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PGCE 2012
- Conference date: 23 Apr 2012 - 24 Apr 2012
- Location: Kuala Lumpur, Malaysia
- Published: 23 April 2012
96 results
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Key features of TEM and EM-IP investigations in South-East Asia
Authors Y.A. Agafonov, I.V. Bouddo, I.V. Egorov and M.M. SallehCurrently in South-East Asia most of the hydrocarbon discoveries are associated with deposits of the shelf zone. Recently however the amount of exploration work on the mainland is growing.
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Marine Broadband Seismic Data Acquisition: PETRONAS Perspective
Authors C. F. Low, S. Chandola, Z. M. Zawawi, A. Aziz Muhamad, S. Kumar and M. Shah SulaimanBroadband seismic data is the primary requirement for improving resolution, enhanced imaging of thin beds and stratigraphic features, seismic inversion etc.
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A New Perspective of Structural and Property Modelling: A Case Study of Baram Oil Field, Offshore Sarawak, Malaysia
Authors A. I. Latief, A. MacDonald, G. Rahman, M. E. Rahman, W. A. Nasir, A. I. Ridzuan and P. A. FaehrmannBaram is a giant mature oil and gas field located in the Baram Delta area of offshore Sarawak Malaysia. Reservoirs are Late Miocene to Early Pliocene deltaic to shoreface sands with an approximate thickness of 7000 feet and comprise of over 200 sand-shale zones.
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Seismic Reservoir Characterisation of a Channel Sand Oil and Gas Field, Malaysia
Authors T. J. Focht, M. Sams, D. Brookes and J. TingA regional, straight sandstone channel of mid-Miocene age within the Malay Basin forms a reservoir at several areas where the flow direction abruptly turned forming large meanders.
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Value & Insights from Synthetic Seismic Validation of Reservoir Models in Carbonate Gas Fields, Offshore Sarawak
Authors K. N. Baharaldin and A. KayesRobust static and dynamic models of the offshore Sarawak gas fields are of paramount importance for reliable volumetric estimation, production forecasting and optimum gas planning in order to maintain the security of gas supply.
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Imaging Solutions for Geophysical Challenges in South East Asia
Authors N. El Kady, Z. Mohd Dom, Y. Prasetyo, M. Bayly, G. Nyein, P. Vasilyev and N. Mat Don YaSignificant improvements in seismic acquisition, signal processing, imaging algorithms and computing power during the last 3 to 5 year period have made possible robust, reliable and effective solutions for most geological and geophysical challenges facing oil exploration companies in the South East Asia region.
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Enhanced Seismic Imaging of a Mature Oilfield
Authors A. Nalonnil, T. Handayani, W. Triyoso and S. DograCrosswell seismic is an emerging technology which provides enhanced resolution seismic imaging between wells
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Depth Imaging Coil Data: Multi Azimuthal Tomographic Earth Model Building and Imaging of Tulip
Authors S. Chen, M. Buia, L. Livraghi, M. Bakhrudin, M. Tham, M. Bayly, S. Ng and O. ZdravevaThe Tulip survey is located over the continental slope east of Kalimantan, offshore Indonesia in a water depth of 300-1500 m.
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A decade of 4D seismic monitoring of carbonate gas reservoirs in offshore Sarawak, Malaysia
Authors P. Hague and C. Boon HongIn recent years 4D seismic monitoring has been widely used to monitor production effects in clastic reservoirs, to the extent that the seismic response of such reservoirs to saturation and pressure changes has become reasonably well understood and is well documented in the published literature.
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Simultaneous Sources: The Inaugural Full-Field, Marine Seismic Case History from Australia
Authors I. Moore, D. Monk, L. Hansen and C. BeasleySimultaneous-source acquisition is an established technology for land data, and has a proven record of providing enormous increases in acquisition efficiency.
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Geophysical Innovation and Technology - Meeting Challenges of a Transition Zone OBC Survey in Malaysia
Authors S. K. Chandola, M. Zabuddin Zawawi, C. T. Law, R. Faizal, M. Adura, R. Roslan, J. Ismail and M. Asraff AriffA Transition Zone Ocean Bottom Cable (TZ‐OBC) survey was recently conducted by PETRONAS Carigali in offshore Sarawak.
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Marine CSEM with A Novel Towed Acqusition System
Authors F. L. Engelmark, J. Mattsson and J. LinfootMarine controlled source EM has ever since its inception been based on a sparse grid of stationary receivers placed on the sea-floor and a dipole source towed close to the sea-floor.
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Pitfalls in CSEM Inversion; a Case Study of a False Positive
Authors V. Ganesan, H. T. Pedersen, S. K. Chandola and N. N. HalimAll sediments exhibit electrical anisotropy to some extent. Certain sediments are more prone to have ahigher electrical anisotropy ratio than others, e.g. shale has usually larger anisotropy ratio than sands(Ellis et al., 2010).
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Seismic Imaging and Interpretation of Paleo-Cave Systems in Karstified Carbonate Reservoirs of Tarim Basin
More LessPaleocave systems are extensively developed within the deep karstified Ordovician carbonate reservoir in the Tarim Basin, West China.
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A Novel Technique for Carbonates to Enhance Static and Dynamic Models
Authors F. Zakeria, M. Altunbay, R. Poit and J. KijamCarbonates pose extreme challenges in petrophysical studies that lead to higher uncertainty levels for static modeling of reservoirs. Consequently, economic viability studies for the field suffer from low levels of confidence.
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Carbonate Petrophysics Leading to Productivity Analysis in Support of Static Modeling
Authors F. Zakeria, M. Altunbay, R. Poit and J. KijamCarbonates pose extreme challenges in petrophysical studies that lead to higher uncertainty levels for static modeling of reservoirs. Consequently, economic viability studies for the field suffer from low levels of confidence.
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Mapping the Kinta Valley Karst System, Peninsular Malaysia: Implications for Better Insight of Subsurface Karst Features
Authors S. Kassa, B. J. Pierson, W. S. Chow and B. A. T. JasmiTo define reservoir geometry, scale, pore networks, and spatial complexities for purposes of exploration and development, near-surface histories of karst features and their later burial modifications must be understood (Loucks, 1999).
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The Role of Play-Based Exploration in Heartland Portfolio Rejuvenation, Offshore and Onshore Sarawak, Malaysia
Authors S. J. Gough, E. W. Adams and T. EversShell has a long history of exploration in Sarawak, with the first discovery being made over one hundred years ago. Historically, exploration has largely focused on three main plays: Central Luconia carbonates situated above a maximum flooding surface known as the mid-Miocene unconformity (MMU), post-MMU clastics in the Baram Delta, and pre-MMU clastics in the southern Balingian region.
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New Seismic Insight At Kebabangan Field: KPOC Gears Up for A Development Drilling Campaign At a New Major Gas-Oil Hub in Offshore Sabah
Authors V. L. Cathey and C. M. CurtisKebabangan Petroleum Operating Company (KPOC), a joint-operating company owned by PETRONAS Carigali Sdn Bhd, ConocoPhillips Sabah Gas Ltd and Shell Energy Asia Ltd, has the green-light to begin construction on a new major gas-oil hub at Kebabangan Field (KBB) in offshore Sabah (Figure 1). The platform’s strategic location will enable the tie-back and development of otherwise remote deepwater Sabah opportunities.
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Overpressured Carbonate Reservoirs, Offshore Sarawak; Methods of Pore Pressure Prediction
Authors P. Baltensperger, W. Zanussi, S. Bordoloi and S. NathRecent exploration drilling by Newfield and their partners, PETRONAS Carigali and Mitsubishi Corporation, in offshore Sarawak, has encountered hydrocarbons in a highly overpressured carbonate pinnacle. Pressure prediction, and safe, effective drilling is challenging and requires an integrated technical approach.
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Pore Pressure Modeling - How to Overcome HPHT Challenges
Authors S. Bordoloi and A. GhoshWell planning and designing HPHT environment have numerous challenges starting from play identification and prospect de-risking to drillability and finally development and production.
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Drilling Risks Associated With Hydraulic Fractures and Reactivating Faults Due To High Mud Weight/Pore Pressure and Miti
Authors A. A. Bal, D. Maya, K. K. Kyi, R. Guha, M. I. Gabreldar and D. Abang IndiIn the wake of the Deepwater Horizon accident, a proper safety process and qualification is being given highest attention in the industry. Process safety refers to the procedures for minimizing risk generally (Deep Water Final Report 2011, Chpt 8). One of these risks is deciding on the appropriate mud weight to balance the pore pressure without fracturing or damaging the formation.
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Integrated Reservoir Characterisation of Turbidite Deposits within a Submarine Canyon, Offshore Sabah, Malaysia.
Authors K. Maguire, C.W. Hong, T.M. Ting and G. StoneOne of the main subsurface uncertainties that impacts waterflood and enhanced oil recovery (EOR) projects is reservoir connectivity. Reservoir connectivity is controlled by structure (faults) and stratigraphy (reservoir architecture). An understanding of structural connectivity in a field can often be determined by detailed structural mapping from seismic.
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Application of Innovative & Unconventional Techniques Enhanced Subsurface Interpretation of the J Sands, B Field
Authors J. Ranggon, M. H. Abdul Halim, W. N. Wan Mohammad, S. Dang Do and M. H. HashimThe B field is fast track development project under a Risked Service Contract (RSC) agreement. The oil and gas are planned to be produced from multiple reservoirs, ranging from the F to the J sandstones.
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An Integrated Approach for Infill Drilling Opportunity Maturation in a Mature Malay Basin Oil Field
Authors A. A. Abdul Rahim, L.H.K. Lim and F. F. FahmiAlpha field, located approximately 240 km east of Kerteh, comprised of generally east-west trending anticlinal complex with four main culminations. Development began in 1989 with a total of 228 development wells drilled from 8 platforms.
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Well Architecture and Design Criteria for Complex Reservoirs in Mature Fields
Authors K. S. Chan, R. Masoudi, B. P. Kantaatmadja and M. OthmanIn the quest of reducing the field development and production cost in Malaysia in the complex multi stacked compartmentalized mature fields, a new initiative is to couple the reservoir dynamic simulation with reservoir geo-mechanical modeling.
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Deepwater Exploration in Malaysia, Offshore Sarawak
Authors P. Baltensperger, K. Robinson, A. Finlay and A. ThomasRecent exploration drilling by Newfield and their partners, PETRONAS Carigali and Mitsubishi Corporation, has proven a new hydrocarbon province in Deepwater Sarawak, Malaysia. The Newfield operated JV have drilled 2 wells since signing the Deepwater PSC in 2004 resulting in 2 hydrocarbon discoveries.
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Hydrothermally Enhanced Fractured Reservoirs – A New Play?
More LessHave we ignored the possibility of hydrothermally enhanced fractured reservoirs as a play type in its own right? With the exception of Nang Nuan (Heward et al, 2000) and some references to the fractured granites in Vietnam (e.g. Hung and Le 2003), hydrothermally altered hydrocarbon reservoirs are largely unreported in the rocks of Southeast Asia.
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“Pre-MMU” Carbonates and the Influence of Age and Tectonic Regimes on Their Growth Styles, Sarawak, Malaysia
Authors E. W. Adams, R. E. Besems and S. J. GoughIn Shell, recent exploration activities have focused on portfolio rejuvenation and play-based exploration (PBE) studies to assess the remaining exploration potential of onshore and offshore Sarawak. Historically, in Sarawak, carbonate exploration has mostly focused on the renowned Middle to Late Miocene Luconia Province carbonates.
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Sepat Barat Deep-2: The Deepest and Hottest HPHT Well in North Malay Basin
Authors S. Osman, M. F. Nianamuthu, F. A. Ismail, J. J. M. Idris and J. PingSince the late '60's, exploration activities had started in the North Malay Basin region which resulted in the discoveries of Jerneh, Lawit, Bintang, Damar, Noring, Guling and Tujoh by several operators (Figure 1).
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Brittle versus Mobile Shale Tectonics in Deltas: Structural Constraints Derived From Regional Seismic Interpretations
Authors P. A. Restrepo-Pace and Mubadala OilMany deltas e.g. NW Borneo exhibits extensional growth systems landward and compressional structures at the present day slope and deep-water positions. The link between the extensional and compressional systems is hard to pin down as deep seismic data is of poor quality in these areas.
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Maturation of a New Play Concept in Northern Provinces of Offshore Sarawak Basin, Malaysia
Authors S.R. Iyer, H. Rosidah and A. Shahrul AmarNorthern provinces of Offshore Sarawak Basin represent a frontier area with low well density and relatively fair understanding of the petroleum system. Hydrocarbon prospectivity evaluationintegrating seismic, gravity, and well data of northern provinces of offshore Sarawak facilitatedmodeling of tectono-stratigraphic framework and geological evolution of the area, culminating in thedevelopment of a new play concept, hitherto untested in this part of Sarawak Basin. Stratigraphy ofthe study area is characterized by a lower synrift sequence, consisting of transitional to shallow marine sediments, unconformably overlain by passive margin sag phase deep water sediments.Exploration to date has focused on hydrocarbon plays in upper part of synrift section. Present paperdeals with maturation of Sequence-A play as a new concept, primarily based on seismic evidence.This sequence, consisting of postulated lacustrine sediments, filled the early formed half grabensduring the first phase of extension. Uplifted sections of this sequence on footwall closures arepotential hydrocarbon plays with charge from adjoining grabens. Regional review of equivalentsections suggests clastic sequence similar to Sampaguita-1 as the most likely analogue. Proving this play will open up substantial exploration potential in the northern provinces of Offshore Sarawak Basin, with significant economic value.
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Tectono-Stratigraphy and Development of the Miocene Delta Systems on an Active Margin of Northwest Borneo, Malaysia
Authors A. Balaguru and T. LukieThe Paleogene regional tectonic setting of Sabah is very complex with southeasterly subduction of the proto-South China Sea in NW Borneo (Hall, 1996), followed by a period of continued deposition of deep marine Rajang Group turbidites. The Late Eocene tectonic deformation is characterized by folding, thrusting and regional uplift related to the collision of the Luconia Continental Block against NW Borneo (Sarawak Orogeny; Hutchison, 1996).
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Integrated Bio- and Seismostratigraphy of the Southern Sabah Offshore, Malaysia
Authors J. J. Lim and Sarawak SHELL BerhadRecently, the Sarawak Shell Berhad Biostratigraphy team has reviewed a selection of key wells from the Southern Sabah Offshore, and has built a consistent biostratigraphic zonation and framework, largely based on nannoplankton and planktonic foraminifera. The biostratigraphic zonation has been tied to regional seismic lines in order to create a robust bio- and seismic stratigraphic framework. A work flow has been set-up and the value of such an approach has been demonstrated in the regional evaluation projects.
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New Joint Categorical/Continuous Simultaneous Inversion Technology
More LessIn this paper we will first review the industry-standard continuous simultaneous inversion methods and point out some shortcomings. We will then introduce our new joint categorical/continuous simultaneous inversion technology, which reformulates the problem to address these issues. We present some examples and wash up with conclusions.
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Petrophysical Evaluation of “Quasi Wet Pay Zones” (QWPZ) via Integration of Advanced and Conventional Wireline Data
Authors S. Ismail, M. M. Altunbay and N. AulaA “low resistivity-low contrast” (LRLC) and low porosity-permeability sand earns a new name “quasi-wet-pay zone” (QWPZ) encompassing the hindrances of recognition due to lesser conductivity-contrast and diminished hydraulic properties. As we know from each components of this new definition, the evaluation of QWPZ sands by traditional methods has historically proven to be inadequate in deciding if the testing/completion/stimulation of a zone(s) is economically feasible.
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Evaluation of Thin-Bedded Heterogeneous Sands Using Geophysical Applications & Well Data for A Robust Development Plan
Authors M. S. Mohd Adnan and F. FahmiA comprehensive technical evaluation was conducted in a gas field in the Malay Basin, offshore Peninsula Malaysia, to describe the degree of reservoir heterogeneity in the thinly stacked non-associated gas (NAG) reservoirs in the Middle Miocene Group D and E sandstones. This paper focuses on two major reservoirs, D-1 and E-1, using AVO modeling and seismic Vp/Vs inversion with well log and MDT pressure integration to better understand sand distribution for subsequent drillwell development planning in 2014.
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Improved Resolution of Thin Turbiditic Sands in Offshore Sabah with Bandwidth Extension – A Pilot Study
Authors G. Yu, N. Shah, M. Robinson, N. H. Nghi, A. A. Nurhono and G. S. ThuMany of the deepwater reservoirs offshore Sabah are characterized by thinly bedded turbidite sands. The main interpretation challenge in the area of interest, is to define the thickness, extension, and geometry of these sands.
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Seismic Resolution and Analysis of Thin Pay Beds
Authors M. Sajid, D. P. Ghosh and Z. T. H. ZuharNew purposed algorithm is based on derivation of seismic trace amplitude with respect to time. Each order of differentiation represents the finer level of change in signal i.e. higher the order of derivation represents finer the change in signal.
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Cascading Inversion Application for Lithology And Porosity Estimation Of Deepwater Thinly-Bedded Reservoirs
Authors A. Nurhono, B. Kantaatmadja, S. T. Goh, V.W.T. Kong, M. R. Abdul Rahman and N. M. HernandezThis pilot project was the first collaboration study conducted in Malaysia for DW Thinly-Bedded Reservoir Characterization. The essential of reservoir model is including the Cascading Inversion of an integrated multiple disciplines workflow: (1) Seismic Data Conditioning, (2) Sedimentology, SHARP and Rock Model Building, (3) Simultaneous AVO Inversion, (4) Lithology and pay prediction, (5) Stochastic inversion and Geo-Modeling, and (6) Validation.
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Hydrocarbon Source Rock Characteristics of The Gondwana Coals from Barapukuria Basin, Bangladesh
Authors M. Farhaduzzaman and University of MalayaBarapukuria coal deposit, one of the five important coal basins of Bangladesh (Figure 1), was discovered at Dinajpur district in 1985 by Geological Survey of Bangladesh (GSB). On the basis of borehole information and seismic survey, the study reveals that the stratigraphy of Barapukuria basin includes four different formations namely Basement Complex, Gondwana Group, Dupi Tila Formation and Barind Clay (Madhupur Clay) Formation and corresponding ages of the formations are Archaean, Permian, Tertiary and Quaternary respectively (Wardell Armstrong, 1991; Islam & Islam, 2005, Islam & Hossain, 2006; Islam & Kamruzzaman, 2006; Farhaduzzman et al., 2011).
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Source Potential and Hydrocarbon Maturity Modeling of the Onshore Masila Basin, Eastern Yemen
Authors M. Hakimi, W. H. Abdullah and M. R. ShalabyThe Masila Basin is one of the most hydrocarbon-prolific sedimentary basins in the Republic of Yemen and is located in the Hadramaut region in East Central Yemen (Fig. 1). The hydrocarbons produced from Masila Basin are predominantly oil with minor amounts of natural gas. This basin formed as a rift during the Late Jurassic-Early Cretaceous due to the Gondwana breakup. This paper will present subsidence histories, maturation window, hydrocarbon generation and expulsion analysis.
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Geological Controls on Well Productivity and Reservoir Performance in Select North American Shale Gas Plays
Authors P. A. L. Winder, R. Herbert, G. Schmidt, M. Lawford and B. FarajNorth American shales typically exhibit geological variability on a macro and micro scale that results in marked variability in well performance. In the era of unconventional development, technology is driving well performance, but geology still underpins the potential for commercial development.
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Application of Dual Well Micro-Seismic Monitoring in Hydraulic Fracturing Stimulation in a Tight Oil Reservoir
Authors T. K. Lim, Y. Li and X. G. YangThe tight sand oil reservoir found in the Urdos basin is known for its very low porosity and permeability. Almost every well has been stimulated using hydraulic fracturing techniques. The average production for a vertical well is approximately 4-5 ton per day. Among such a large number of fracture jobs, enhanced production after stimulation does not always meet expectations.
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Applications of 3D Micro-CT Images and 2D BSEM-EDS for Petrophysical Reservoir Characterization
Authors L. Riepe and PETRONAS Carigali Sdn BhdThe paper provides an overview on the application of 3D imaging and Pore Network Modeling (PNM) technology to establish a direct relationship between rock micro-structure parameters from 3D via micro-tomographic images, and the simulation of petrophysical properties of reservoir rocks.
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Integrated Interpretation of an Iron-Rich Sediment, Jansz-Io Field, Northwest Shelf, Australia
Authors G. R. Heavysege and A. MillsThis study is focussed on the investigation of clastic reservoirs in the Malay, Sarawak and Sabah Basins, which are mainly shaly and silty sandstone zones, that were not obvious and not classified as “net pay” from previous conventional formation evaluation techniques.
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An Integrated Petrophysical Analysis of Low Resistivity Low Contrast (LRLC) Pays in Clastic Reservoirs in Se Asia
Authors L. Riepe, M. N. Zain and N. S. ZainudinJansz-Io Field is part of the Greater Gorgon Liquefied Natural Gas (LNG) Project on the Northwest Shelf of Australia. The reservoir consists of sub-tidal marine sandstones that will be developed in a present day deep water setting. The majority of the reservoir is highly bioturbated shaly sandstones with significant amounts of Potassium Feldspar and Glauconite. The reservoir is capped with a medium to coarse grained sandstone with abundant iron-rich ooid grains and iron-rich cements including siderite, hematite, limonite, and an amorphous green clay mineral identified as Berthierene, a form of Chamosite.
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Lithology Discrimination Through Elastic Inversion
Authors D. Ghosh and Universiti Teknologi PETRONASSince the advemt of Bright spot DHI bright spot technology in the early 80's, prospect evelauation and reservoir development using amplitudes, or some form of this attribute, is an accepted norm in the oil en gas , and PETRONAS is nog excepition.
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Estimating Porosity from Determinsitic Inversion
Authors M. Sams Sdn Bhd, T. J. Focht and J. TingIn quantitative reservoir characterisation we try to extract absolute information about reservoir rocks from the seismic data. One method is to invert the seismic data to elastic rock properties and then interpret these rock properties in terms of reservoir properties. There are a number of problems that hamper this process.
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The Evolving Role of Geophysics in Exploration. From Amplitudes to Geomechanics
Authors E. C. Andersen and D. GrayThe purpose of this paper is to review a few of the major milestones of geophysical innovations, as we see them. The aim is to provide insight into how geophysics has evolved and provide a glimpse into the direction of the technology and its application to improving exploration and production solutions.
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Xu and White Revisited
Authors M. Sams Sdn Bhd, T. J. Focht and N. Azuairi Che SidikIn this paper we show that a single aspect ratio applied to the total porosity of a sand-clay mixture can accurately model both P- and S-sonic data. We also show that the variation of this optimal aspect ratio can be predicted from the petrophysical properties of the rocks, whilst keeping the effective elastic properties of the minerals constant over large geological intervals. The use of one variable aspect ratio applied to the total porosity provides a much better fit to the data than using a single aspect ratio for each mineral.
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Foresee the Unforeseen: Modeling West Baram Delta Overpressure
Authors C. A. Ibrahim, L. Light, J. Mennie and C.K. NguPETRONAS Carigali and Shell Sarawak Berhad commenced a drilling campaign in SK307 in 2011 that constituted the first HPHT wells to be drilled with a 15K capacity rig in the West Baram Delta. Understanding regional overpressure behaviour will allow more accurate modelling of the pore pressure behaviour for future HPHT exploration opportunities and robust well planning.
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Systematic Evaluation of Play and Prospect Risk Using a New Play-Based Exploration Methodology
More LessPlay-based exploration offers a methodology to evaluate the various elements of petroleum systems in a regional context and then incorporate this knowledge into geologically based and objective evaluations of specific objects.
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Systematic Application & Play-based Exploration Methodology Using ArcGIS in Sabah Exploration Block SB309 & SB310
More LessThe present study aims to improve the understanding of the basin through application of a systematic analysis of all the petroleum risks in the play fairway mapping.
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Deepwater Reservoir Geometry and Characterisation: Analogue from the Semantan and West Crocker Formations
Authors H. H. Ismail, M. Madon, Z.A. Abu Bakar and M.S. LemanThis paper is aimed to highlight the deepwater sedimentary successions as potential analogue for deepwater reservoir geometry and characterisation. The understanding of sandbody geometry, heterogeneity and characterisation of deepwater reservoirs is important for better prediction of gas/chemical movement for EOR purposes especially in the Sabah Basin.
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Well Log Application in Source Rock Evaluation: Using Committee Machine with Intelligent Systems
Authors M. Verdiyar, F. Kamyabi, A. Nazarpour and M.K. Ghassem AlaskariSource rock evaluation consists of assessing the hydrocarbon generating potential of sediments by looking at the sediment's capacity for hydrocarbon generation, type of organic matter present and what hydrocarbons might be generated, and the sediment's thermal maturity and how it has influenced generation. From this, it is possible to begin answering questions about if, how much, what kind, and when hydrocarbon generation has occurred.
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Geochemical Evaluation of Oil Reservoirs in the World's Largest Gas Field from Persian Gulf, Iran
Authors P. Hassanzadeh, M. Khaleghi, A. Ahanjan, M. Kobraei and R. Bagheri TirtashiIn this article hydrocarbon potential of probable source rock formations for Oils is investigated in the South Pars field which is southern extension of the North field of Qatar Country.
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Common Liptinitic Constituents of Mukalla Coals in The Offshore Qamar Basin, Eastern Yemen: Implication for Hydrocarbon
Authors M. Hakimi and W.H. AbdullahThis presentation will identify and describe the type of common liptinitic constituents of the Mukala coals and their relation to hydrocarbon generation potential.
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Generating a New Approach for Continuous Reservoir Model Updating: Non-Gaussian Priors & Nonlinear Data Functions in EnKF
Authors S. Forghany, A.A. Asgari and T. BehrouzIn this study we present a sequential data assimilation procedure, based on a Bayesian framework, where the model parameters and the state variables are updated continuously in time.
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Diverse Origins of Carbonate Cements Revealed By Carbon and Oxygen Isotopic Analysis
Authors D. M. Ince and PETRONAS Carigali Sdn BhdTwo cores were recovered from Lower Miocene reservoir sections. The reservoirs are of shallow marine facies and show extensive bioturbation with distinctive forms such as Ophiomorpha present.
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Conceptual Geology of Dulang Using Sedimentology, Stratigraphy and Netsand Distribution
Authors S. C. Kurniawan, K. Saraton and U. Deliza AleeshaThe objective of this study is to map all the major reservoirs honoring all the available well data and other regional data to have better understanding of the depositional environment and generate a conceptual geological model for Dulang field which after validation will be incorporated into the 3D static model.
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Pore-Pressure and Subsurface-Plumbing Patterns in Central Luconia; Offshore Sarawak, Malaysia
Authors E. Kosa and Sarawak Shell BhdCentral Luconia is a geological province extending over an area of some 40.000km2 offshore Sarawak, NW Borneo (Fig. 1). More than 200 Miocene-Recent carbonate build-ups are found in this province, many of which contain commercial hydrocarbons. Pore-pressure regimes within the carbonate reservoirs range from hydrostatic to lithostatic, and as such have a strong bearing on hydrocarbon prospectivity as well as on safety and performance of drilling operations.
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Reservoir Characterization Enhancement Through Integrated Wellbore-Reservoir Flow Model and Pressure Transient Analysis
Authors K. Khadivi, R. Masoudi, M. Soltanieh and F.A. FarhadpouIn this work, a methodology has been proposed using an integrated wellbore-reservoir model, which has been coupled with the numerical pressure transient analysis for improving the reservoir characterization in vertically heterogeneous reservoirs.
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EB Field: Doubling a Marginal Field's Reserves by Understanding the Application of "Enabling" Technology
Authors K. Afzan, O.T. Suan, M. Lambert and B. GoodinThe EB Field is located 160 miles northeast of Terengganu, Malaysia. The primary oil reservoir is Tertiary age and is regionally extensive, highly porous and permeable sandstone. EB Field is considered a marginal field development. It is a particularly challenging development due to the thin oil column (14 meters) which is entirely within the transition zone.
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Unravel New Exploration Opportunity in Central Luconia
Authors A.H.W. Abdullah, J. Singh, S. Osman and C. AbdullahA recent exploration well, Well-D, has discovered the potential of hydrocarbon in Cycle V clastic reservoir in Central Luconia which has been well-known of its pool of gas-prone carbonate build-ups.
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Structuration & Stratigraphic Influence in Post Carbonate Trap Geometry of ‘K’ Prospect, SK315 Block, Offshore Sarawak
Authors K. A. K. Amry, M. S. M. Sharir, S. S. Wafa and A. M. S. AzlanWhat can we do in an overly matured basin like the Central Luconia province? With top oil and gas companies having explored the area exhaustively, there exists a crucial need to find better ways or implement new mindsets of seeking and finding hydrocarbons (HC).
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Structuration & Stratigraphic Influence in Post Carbonate Trap Geometry of Kumang Prospect, SK315 Block,Offshore Sarawak
Authors K. A. K. Amry, M. S. M. Sharir, S. S. Wafa and A. M. S. AzlanWhat can we do in an overly matured basin like the Central Luconia province? With top oil and gas companies having explored the area exhaustively, there exists a crucial need to find better ways or implement new mindsets of seeking and finding hydrocarbons (HC).
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Sedimentological Characterization of Deeper Group M Reservoirs in Malay Basin
Authors S. A. M. Yusak and Petronas Carigali Sdn BhdThis paper focuses on the sedimentological characteristics of the deeper Group M, the deepest penetrated sedimentary sequence in the study area with hydrocarbon discovery.
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The Exploration Strategic Potential of Rajang Delta System
Authors Z. Ibrahim, B.H. Wei and A. RaufIn this study we established the same stratigraphic markers of the Sarawak basin (Cycle-I up to Cycle-VIII) in the East Natuna in order to come up with sequential stratigraphic basin evolution on both regions as an integrated linked geological event since late Oligocene.
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Shallow Reservoirs, The Neglected Play in The Malay Basin - A Case Study From The A Field
More LessMalay Basin has been one of the prolific hydrocarbon basin in Southeast Asia since 1960's. Being a matured basin now, the hydrocarbon exploration in Malay Basin has become more and more challenging, innovative approaches are required, to identify a new play type for example is becoming more relevant in current scenario.
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Pre-Tertiary Fractured Basement of Mega Host Block A, Malays Basin in Light of Current 3D Seismic Data Interpretation
Authors N. H. Ngoc, S. A. Aziz and P. N. Bt. MokhtarIn this paper the authors would like to present new results of 3D seismic data interpretation to predict high HC potential zones in the study area. Some of the presented data have been applied to design the latest basement appraisal wells for the area with promising results.
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3D Near-Wellbore Structural Modeling, Natural Fracture Characterization and in-Situ Stress Analysis in A Complex Thrust
By R. DashtiIn this study, using a new technique results of borehole images analysis in two wells are integrated to determine the structural configuration of a complex hydrocarbon-bearing structure through construction of a 3D near wellbore fault system and surfaces. Also natural fracture system and in-situ stresses are characterized in incorporation with dipole shear sonic data.
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Application of Stable Isotope Analysis from Central Luconia, Sarawak: Insights into Reservoir Development and Diagenesis
Authors K. K. Ting, B. J. Pierson and O. S. Al-JaaidiThis paper is focused on the last sequence before the platforms drowns, referred to as a sequence of zone 5, interpreted as a highstand sequence capped with a subaerial exposure unconformity.
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CRS-Stack and NIP-Wave Tomography Implemented to the SH-Wave Reflection Seismic Data for Shallow Hydrocarbon Prospecting
Authors M. R. Sule, A.A. Valencia, A. Hendriyana, U. Polom and C.M. KrawczykMost of exploited hydrocarbon reservoirs are situated at the depth of around 2,000 – 3,000 m. The use of P-wave reflection seismic is suitable for that depth interval and commonly implemented in the oil and gas industries.
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Workflows to Improve the Resolution of Post-Stack Seismic Data and Attributes from the Malay Basin
Authors A.E. Barnes, M.F. A. Rahim and A.R. GhazaliAs Malaysia moves towards enhanced oil recovery, it becomes more important to extract as much information as possible from existing seismic data over producing fields. A straightforward and cost-effective means to help achieve this is to enhance the resolution and interpretability of seismic data through modern methods of post-stack interpretive data processing and seismic attributes.
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Integrated Fluid Analysis Technique to Improve Evaluation on Fluid Potential in Downthrown Structure Prospect
Authors T.A. Tiur Aldha and G.T. Gunawan TaslimThis paper describes the process of integrated fluid analysis applied on pre-drilling of appraisal well in downthrown structure area. An integrated study involving seismic attribute analysis and reservoir characterization tools in Peninsular Malaysia provided an understanding of the structure, reservoir continuity and quality of three mature reservoirs that optimized new drilling location of appraisal well.
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Integration of Sequence Stratigraphy and Elastic Inversion Improved Understanding on Reservoir Characterization
Authors N.M. Mohamud, O.A.M. Mahmud, N.A.R. Razali and M.H.M.N. M NorThis paper will present a case study of which sequence stratigraphy and elastic impedance volume was used to understand the reservoir properties and performance in M Field, Offshore Sabah.
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An Efficient Development 2011 Case History from the Gulf of Thailand
Authors R. C. Roever, J. Moon, R. Ripple, D. Cox, N. Htein, J. Mitchell, S. Rubio, J. Pringle, R. The, G. Peace and A. LairdFrom January to December 2011, Coastal Energy (CEC International, Ltd.) has discovered, appraised and started production from the Bua Ban North field. This project encompassed drilling and completing 21 wells with a subsequent hook-up to two Mobile Offshore Producing Units (MOPUs) and Floating Storage Options (FSOs). By year end, average daily oil production over the last five months had increased by over 70% from the previous seven months.
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Reservoir Characterisatioin of Mishrif Formation of Garraf field, Iraq, using 3D seismic and Al Inversion
Authors M. Embong, M. Higashi, H.H. Abu Bakar, K.A. Zamri, F.H. M Ali, S. Moriya, S.B. M Said and A.T. Patrick PantingThis paper will demonstrate the reservoir characterization workflow, the importance of regional understanding, data integration and subsequently reservoir characterization results.
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Geo-Information & GIS: Adding Value to Exploration and Development Activities
Authors G.G. Tan and Sarawak Shell BerhadGeographic Information System (GIS) has always had a role to play in the search for hydrocarbons- and use of GIS in the exploration industry is increasing. The questions posed by exploration activities and the answers offered by GIS are often a natural fit.
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A Structured Approach Towards Quantification of Subsurface Parameter Ranges
Authors A.J.W. Everts, L. Alessio, P. Friedinger and F. RahmatObjective of this paper is to illustrate how a structured approach towards quantifying the expectation ranges of key subsurface parameters, differentiating between true uncertainty and mere variability and recognizing the possibility of biases in our subsurface data, can lead to significantly improved asset management, i.e., better reservoir models, improved accuracy of resource estimates, more objective assessment of appraisal value etc.
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Biostratigraphic Real-time Well-site Support for a NW Palawan, Offshore Philippines Appraisal Well
More LessReal-time biostratigraphic well-site support has been successfully applied in appraisal well, NW Palawan, offshore Philippines, to guide the Shell's Malampaya team to pick the 9 5/8" casing point approximately 50 m. above the targeted Nido carbonates.
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A Sedimentologic and Petrographic Perspective of the Miocene Stage IVA from the Klias Peninsula to Labuan Island
Authors T.D. Lukie and A. BalaguruThe Miocene outcrops in NW Sabah provide an opportunity to study the rocks equivalent to the offshore reservoirs undergoing exploration. The primary target for most exploration is the Stage IV (Figure 1) and it ranges in thickness from 3 to 5 kms and comprises interstratified sandstones and shales deposited within marginal marine to shoreface environments. The Stage IVA which is the focus of this study, sits on the Middle Miocene Unconformity (MMU), also known as the DRU (Deep Regional Unconformity) and marks the onset of the next major phase of sediment accumulation (after Early Miocene Stage III) in NW Sabah.
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Converted Waves Seismic Imaging : Importance of Gamma Estimation
Authors A. G. Mohd Adnan and A. R. GhazaliIn this paper, we studied gamma estimation for 4C seismic imaging and a case example from an offshore field Malaysia is shown.
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An Integrated Approach Towards Delineating Hydrocarbon Prospectivity in Untested Fault Blocks Within a Brown Field. A Case Study in B Field, Offshore Sarawak, Malaysia.
Authors A. Azami, A. Hashim, N. Alias, N. Ujal, M. Bhattacharya, A. Roy, S. Pamungkas and T. AldhaB Field is located approximately 80 km from Bintulu in water depth of about 90 feet, Balingian Province, offshore Sarawak, Malaysia. In was discovered in 1976, with first oil achieved in 1984. Since then, more than 70 wells have been drilled, with production coming from three main accumulations: B North, West, and Northwest.
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Integrated Geoscience Interpretation of Selected Group B Sands In Beta Field, Malay Basin
More LessBeta Field is a non-associated gas field located about 220 km north of Kerteh in water depth of 60 meters,. The field was discovered in 1970 and development of the Group “B” sands began in 2003 with first gas in March 2003. The Group B sands were not targeted during the initial field development. The field is a broad, low relief high side fault dependent closure in the northern part of the Malay Basin. In this paper we will briefly examine future development of the shallow and likely unconsolidated B-A, B-B, B-C, and B-D reservoirs in Beta Field.
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Geohazards Assessment, Data Integration and Visualization via ArcGIS
Authors M. Zulkifli, D.A. Bean and T.K. TiongGeohazards are geological features on the seafloor or in the subsurface that may pose drilling and/or development-related issues (e.g. infrastructure placement). Geohazards are conventionally assessed qualitatively via seismic interpretation and the evaluation of site survey geophysical data such as high resolution 2D seismic, multibeam bathymetry and side scan sonar.
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The Evolution of Tiltmeter-Based Reservoir Monitoring: From Risk Mitigation to Production Optimization
Authors S. Marsic, M. Machovoe and W. RoadarmelTiltmeter technology has proven extremely valuable in heavy oil recovery fields as shown by the increasing installations worldwide, a 15+ year history of monitoring success in regions such as the San Joaquin Valley in California, and now an increasing regulatory demand for its operational use. The use of tiltmeter diagnostics has been a widely accepted tool for mapping of fracture stimulation treatments, but also fulfils a need for a cost effective, near real-time reservoir surveillance tool in thermal enhanced oil recovery (EOR) environments.
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Application of Seismic Inversion to Mitigate Reservoir Heterogeneity Uncertainty for Optimized Well Planning
Authors M.F.M.F. Mohd Fuad, F.F. Fahmi and A.G.W. WilliamsA seismically-derived sand/shale indicator volume was incorporated in the construction of a geologic model used in well placement optimization and production forecasting for the T gas development project.
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Key features of TEM and EM-IP investigations in South-East Asia
This paper reports the characteristics of an onshore EM survey recently conducted in the South-East Asia region. The survey area is located on Northern part of the Borneo island (Sarawak, Malaysia) and is characterized by specific natural and geographical conditions and therefore the production work was complicated by several factors.
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CSEM Application in Carbonate Environment: A Case Study
Authors A. S. Saleh, S. K. Chandola, P. K. Lee, T. Velayatham, P. Kumar, M. S. Wahid and J. BeenfeldtApplication of Controlled Source Electro Magnetics (CSEM) method as a derisking tool has found increasing application, particularly in deep water environment. CSEM provides resistivity distribution in the subsurface to differentiate between hydrocarbon and brine-filled reservoirs. However, the application of CSEM method in carbonate reservoirs has been rare due to the inherent inhomogeneity associated with carbonates.
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Application of TTI Reverse Time Migration, Deepwater Offshore Malaysia
More LessIn this paper we present a case history of applying TTI RTM (Reverse Time Migration) for imaging in a deep-water area offshore Malaysia. Use of RTM is not new but examples tend to come from areas such as the Gulf of Mexico and North Sea and as such, the example presented here may be the first of its kind in South East Asia.
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Application of Upscaling Permeability Workflow: Pore to Core Plug Scale on Malay Basin Thin Sections
Authors L. A. Lubis, Z. Z. Tuan Harith, K. A. Moh Noh, H. Khairy and A. Moh SalihThe main purpose of this paper is to present the application of our newly permeability prediction workflow which can be implemented in real time on standard personal computer.
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Studying Carbonate AvO Response
Authors Y.F. Tiong and Sarawak Shell BerhadAvO inversion has not been done for carbonate fields because carbonate rock does not normally display AvO effects. However, there is no hard evidence for that, so this project was setup to investigate if there are any meaningful AvO effects in Sarawak carbonates.
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Status of Exploration on Shale Gas Resources in India
Authors A. Boruah and University of BarodaThe present paper deals with the investigations and evaluations of shale gas resources of prospective sedimentary basins in India. It also attempts to discuss the gas generation and retention mechanisms within shale rock.
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Time-Pressure Correlation to Estimate Dewatering Time for Coalbed Methane Reservoir at Saturated and Undersaturated Condition
Authors D.C.I. Hutami, I.K. Alhamzany, I.G. Permana, S.K.H. Wicaksono, H.W. Alam and U.W.R. SiagianIn this paper, the authors would like to recognize dewatering time using time-pressure correlation.
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