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IPTC 2012:International Petroleum Technology Conference
- Conference date: 07 Feb 2012 - 09 Feb 2012
- Location: Bangkok, Thailand
- Published: 07 February 2012
121 - 140 of 358 results
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Investigations of Flow Behavior in Well-Head Jumpers during Restart with Gas and Liquid
Authors Angelina Coletta, Michael Volk and Emmanuel Delle-CaseA very important aspect of offshore operations is the risk associated with flow assurance issues, with hydrates the most
prevalent of them. The risk of hydrate formation brings the possibility of hydrate plug formation in the line which usually
takes a long time to dissociate. Typically, connecting the wellhead with the manifold, the jumper is usually not insulated and
has low spot sections where the water can accumulate - making it one of the most critical locations especially during a restart.
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Capillary Tubing Advancements for Enhanced Production and Reduced Environmental Impact – A Case History Review
Authors Brad Pate and Rick StanleyOver the past several years the industry has seen significant technology advancements that have supported the new
innovative applications for “Capillary Tubing Systems” from basic onshore chemical injection installations to more complex
offshore applications. These innovative applications continuously challenge and redefine the boundaries of conventional well
intervention methodology. Well interventions in any economically challenging environment can sometimes be difficult to
justify. Capillary tubing systems have recently been deployed on challenging new projects in Asia Pacific, Europe and the
USA to provide operators with an alternative cost effective method to maintain well bore integrity and enhance production.
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Real-Time Evaluation of CO2 Production and Sequestration in a Gas Field
Authors M. Aschehoug and C.S. KabirProduction of substantial fraction of CO2 in any hydrocarbon-gas stream poses a significant challenge in terms of separation
and sequestration. Both environmental concerns and economic incentives provide the operators to search for safe, costeffective
ways of disposing CO2.
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IPTT vs. Well Testing and Deconvolution Applications for Thinly Bedded Reservoirs: Case Studies from the Gulf of Thailand
In Asia Pacific region, there are many thinly bedded reservoirs which are composed of interbedded porous and permeable
sands with variable proportions of thin silt and clay beds. These reservoir sand bodies range from millimeters to tens of meters
in thickness. Though the reservoirs are highly permeable, reservoir heterogeneity caused by silt and clay laminations affect
recovery and sweep efficiency.
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Field Scale Geomechanical Modelling Using a New Automated Workflow
Authors Silvia Monaco, Gaia Capasso, Stefano Mantica, S.Donato Milanese, Deepak Datye and Roberto VitaliIn the past, a workflow was internally developed in eni for the field scale study of geomechanical effects induced by reservoir
depletion. This workflow, however, included non-automated procedures as well as simplifications related to the geometry
description, such as smearing of faults and a simplified treatment of layer pinch-outs.
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A 2D on 3D pilot for 4D Feasibility: A Success on a Carbonate Field
Authors Christian Hubans, Enrico Zamboni, Emmanuelle Brechet, Hubert Leher and Alain GiovanniniIt is nothing unusual now to see decisions taken to record time-lapse seismic surveys in unconsolidated sands or turbidite
environments. The Gulfs of Mexico and Guinea are typical areas for which investment in seismic monitoring raises no
questions. However, in other areas, such as carbonate fields, the question is less clear, because the physical behavior of
carbonate rocks is difficult to describe accurately. Very few examples of 4D monitoring in carbonate environments can be
found in the literature.
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Simulation of Hydrate Dynamics in Reservoirs
Authors M.T. Vafaei, B. Kvamme, A. Chejara and K. JemaiGas hydrates in reservoirs are generally not in thermodynamic equilibrium and there may be several competing phase
transitions involving hydrate. Formation of carbon dioxide hydrates during aquifer storage of carbon dioxide involves roughly
10% volume increase compared to groundwater. Dissociation of hydrate towards under saturated fluid phases involves the
same level of contraction. Hydrate phase transitions are generally fast (scales of seconds) compared to mineral dissolution and
precipitation and it is unlikely that a time shifted explicit coupling to geo mechanical analysis will be able to capture the
appropriate dynamic couplings between flow and changes in stress.
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Sinphuhorm, Thailand Pipeline Integrity Management Utilizing Advanced Monitoring Techniques
Authors Lawrence M. Cenegy, Clyde A. McAfee, Rachan Engchanil and Apisith ThatsanaAs a primary energy source, natural gas continues to play a major role in meeting Thailand’s energy requirements and is
preferred for generating the country’s electricity. As energy demand increases, a fully integrated pipeline integrity program
for wet gas pipelines becomes necessary to ensure safe production from Thailand’s gas fields. This paper presents an
overview of the corrosion mitigation and monitoring strategies implemented on a 63.5 km (40 mile) long, 385 mm (15.2 in)
maximum internal diameter, carbon steel wet gas pipeline. The pipeline is in Khon Kaen Province, located northeast of
central Thailand.
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Integrated Crosswell Seismic Application Across a Giant Carbonate Field for High Resolution Reservoir Properties Estimation
Authors F. Miranda, C. D‘Agosto, S. Terzuoli and D. GranaThis paper describes the application of Integrated Crosswell Seismic (ICS) in a carbonate reservoir at a giant carbonate field
to estimate reservoir properties, petrophysics and facies, from seismic information. Besides high resolution seismic imaging
for structural information, sections of porosity, gamma ray and volume of clay distribution were estimated to determine the
vertical and lateral facies changes between the selected wells.
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Modeling Gas Migration, Distribution, And Saturation In A Structurally And Petrologically Evolving Tight Gas Reservoir
Authors John S. Davis, Isolde Belien, Xiaoli Liu and Susan DoughertyEarly prediction of the distribution and saturation state of natural gas in tight gas reservoirs results in improved development
and production strategy, improved recoverable volumes estimates, and decreased costs associated with development and
production. Three-dimensional basin modeling coupled with three-dimensional invasion percolation-based migration
modeling of the NW German Basin shows promise for prediction of gas distributions and saturations in a tight gas reservoir
with a complex history.
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Unlocking the Limits of Sand Screen Reliability with an Innovative and Self-Adapting Technology
Authors C.S. Yeh, T.J. Moffett, C.S. Mayer, N.S. Bailey D.A. Howell, M.D. Barry, M.T. Hecker, A. Green, G.A. Gillespie, C.A. Hall and S. McNameeSand screens subjected to increasingly complex and challenging environments are pushed to the limit of maintaining reliable
sand control. Both preventive and reactive methods have considerably improved sand screen reliability, but the effectiveness
of these methods in sustaining production is still limited by downhole uncertainties. Consequently, innovative sand screens
are required to enhance sand control reliability, while maintaining operational simplicity. MazeFlo™ is one recent
technology innovation from ExxonMobil designed to meet this challenge.
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Thin-skinned Thrust-fault Complex in the Phu Quoc Basin, SW Vietnam
Authors Emil Bach Madsen and Stig A. Schack PedersenThe Phu Quoc Basin is a Late Jurassic to Early Cretaceous foreland basin located SW of Vietnam in the eastern part of the
Gulf of Thailand. A structural model for the basin is provided based on the interpretation of a commercial 2 D digital multichannel
reflection seismic survey in a rectangular open grid with an approximate distance between the lines of 8 km. The
survey consists of 29 profiles totalling about 1500 km with a range of 7 sec TWT depth.
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Fiber Optic Technology for Reservoir Surveillance
Authors J.M.V.A. Koelman, J.L. Lopez and J.H.H.M. PottersFiber-optic sensing technology for in-well applications has traditionally focused on temperature profiling. This has
limited the application of fiber-optic reservoir surveillance to recovery processes with a pronounced thermal signature.
Currently, novel fiber-optic technologies entering the market promise a much wider range of subsurface measurements. This
opens new avenues in well and reservoir management and highlights the opportunity for fiber-optics to become a pervasive
oilfield technology. In this paper we discuss field trials that combine Distributed Temperature Sensing (DTS), Distributed
Strain Sensing (DSS) and Distributed Acoustic Sensing (DAS). These trials demonstrate the potential of fiber-optic sensing
technology for well integrity monitoring, gas lift optimization, in-flow profiling and downhole seismic acquisition.
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Complexity of Minifrac Tests and Implications for In-Situ Horizontal Stresses in Coalbed Methane Reservoirs
Authors Zhi Fang and Abbas KhaksarMinifrac tests are used to obtain key parameters of reservoirs for geomechanical modeling and hydraulic fracture treatment
design. An ideal minifrac test can clearly indicate the leak-off pressure, fracture propagation pressure, shut-in pressure and
fracture closure pressure. Repeated minifrac tests in the same interval provide additional value by verifying the fracture
parameters with similar results. However, minifrac tests of two wells conducted in a coal seam in a coalbed methane (CBM)
reservoir in China showed unconventional results – the fracture profile is less distinguishable for the fracture behaviors, and
the subsequent test cycles in each well exhibited higher pressures than the precursors.
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The Petrophysics of Shale Gas Reservoirs: Technical Challenges and Pragmatic Solutions
Authors Vivian K. Bust, Azlan A. Majid, Joshua U. Oletu and Paul F. WorthingtonThe host rocks of shale gas accumulations act as source, seal and reservoir. They are characterized by complex pore systems
with ultra-low to low interparticle permeability and low to moderate porosity. The word “shale” is used in the sense of a
geological formation rather than a lithology, so shale gas reservoirs can show marked variations in rock type from claystones,
marlstones and mudstones to sandstone and carbonate lithological “sweet spots”. The pore space includes both intergranular
and intrakerogen porosity.
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Process Optimisation in Acid Gas Removal System
This paper mainly describes challenges in process design and operation optimization of Acid Gas Removal System with
membrane separation technology in developing high CO2 gas fields. It concentrates on techniques and applications being
used in CO2 Removal System of Arthit Offshore Processing Plant located in the Gulf of Thailand in which PTT Exploration
and Production Public Company Limited (PTTEP) is an operator. This plant was designed based on export gas at 363
MMscfd with feed CO2 up to 40% and lower down to 23% in Sales gas.
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Advancements in Openhole Completion Technology - Establishing and Sustaining Differentiating Sand Control Completion Performance
Authors M.D. Barry, M.T. Hecker, C.S. Yeh and T.J. MoffettOpenhole completions are often selected as the preferred completion technique to maximize reservoir flow potential and
provide reliable, high capacity, low skin completions. In many environments, these completions will also require some form
of sand control. To meet development objectives, operators are continually challenged to select, design, and install fit-forpurpose
completion strategies to optimize ultimate recovery for these fields. These challenges necessitated the creation of
new practices, procedures, and hardware to ensure consistent delivery of reliable wellbores, across the entire organization, to
achieve long-term, economic success.
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Quantification of Pore Structure in a Miocene Carbonate Build-up of Central Luconia, Sarawak and Its Relationship to Sonic Velocity
Authors Nor Sara Izzatti Bashah and Bernard J. PiersonCarbonate rocks frequently exhibit velocity-porosity relationships less predictable than those found in
siliciclastics because of complex and heterogeneous pore structures. Traditional pore-type classifications
describe these pore structures but are inadequate for correlations to the rock’s physical properties.
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A Multidisciplinary Integrated Approach to Natural Fracture Detection, Characterization and Modeling and Its Application
Authors Zhaoming Wang, Huiwen Xie, Gengxin Peng, Duoming Zheng, Feng Shen and Yang ZhangUnderstanding anisotropic and heterogeneous characteristics of fractures in the seismic and fluid flow leads to a
multidisciplinary approach which can efficiently reduce the uncertainties of the fracture model. This paper presents an
integrated workflow in which multi discipline techniques incorporating static and dynamic field data sets deliver an
understanding of fracture impacts on well performance and reservoir dynamic behavior at different stages of field
development. Imaging logs are used to identify fracture sets and quantify fracture variations of the density and orientation with
the reservoir depth.
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Side-wall Coring: Advanced In-situ Freeze-Core Technique
The importance of obtaining a perfect core of a petroleum reservoir is undisputed. Despite tremendous advances in coring
techniques, some basic problems remain as challenging as ever. One of these is the coring of unconsolidated formations.
Most side-wall cores result in partially damaged cores, totally damaged cores or no core at all, especially in unconsolidated
formations. This proposed technique promises to greatly improve the recovery, quality and longevity of the core, thereby
resulting in a much better interpretation.
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