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IPTC 2008: International Petroleum Technology Conference
- Conference date: 03 Dec 2008 - 05 Dec 2008
- Location: Kuala Lumpur, Malaysia
- Published: 03 December 2008
1 - 20 of 303 results
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Global Petroleum Market Entry Risk Assessment and Opportunity Mining Through Comparison Matrix Approach
By S. RajanEscalation of per-barrel crude prices is expected to continue on an inflation adjusted basis in the foreseeable future according
to most analysts. Rising prices are largely attributed to market forces fueled by surging world economy and growing
demand, particularly in Asia and Middle East. Relatively flat rates of exploration and exploitation success have been unable
to keep pace with that growth, leading to tight supplies. Politics, weather, speculation and other factors further contribute to
supply uncertainty.
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A Methodology for Gauging the Sensitivity of Project Value During Concept Comparison and Selection
Authors M. Neuhold, S.A. Shedid, C. Jablonowski and C. Wiboonkij-ArphakulProject value is highly correlated with decisions made
during concept comparison and selection. Decisions as
such are made amid uncertainty, putting value at risk. This
study details a methodology for determining the loss in
project value when inaccurate estimates are used during
concept comparison and selection. The difference between
net present values (NPVs) based on inaccurate estimates
and those based on an alternate hypothesis that is assumed
to represent the truth determines the magnitude of loss.
The value of the information required to reduce
uncertainty can then be obtained.
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A Novel Method to Construct Capillary Pressure Curves by Using NMR Log Data and Its Application in Reservoir Evaluation
More LessBy analyzing hundreds of capillary pressure curves, the controlling factors of shape and type of capillary pressure curves are
found and a novel method is presented to construct capillary pressure curves by using reservoir permeability and a synthesized
index. The accuracy of this new method is verified by mercury-injection experiments. Considering the limited quantity of
capillary pressure data, a new method is developed to extract the Swanson parameter from the NMR T2 distribution and
estimate reservoir permeability. Integrating with NMR total porosity, reservoir capillary pressure curves can be constructed,
which could be used to evaluate reservoir pore structure and calculate reservoir originality water saturation in the intervals
with NMR log data. At last, the constructed NMR capillary pressure curve by this new method is used in well site to detect the
change in reservoir pore structure and initial water saturation as a function of depth, comparision among the calculated result,
core data and Archie water saturation, demonstrate the responsibility and accuracy.
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Post-Frac Analysis Based on Flowback Results Using Chemical Frac-Tracers
Authors M. Asadi, R.A. Woodroof and J.D. Dumas Jr.Chemical frac tracing is used to evaluate flowback and cleanup efficiencies. The technique utilizes a family of
unique, environmentally-friendly, fracturing fluid compatible chemical tracers to quantify segment-by-segment
recovery for individual fracturing treatments and stage-by-stage recovery for multi-stage fracturing treatments.
These chemical tracers with their unique chemical characteristics are mixed at a known concentration into frac fluid
stages as the frac fluid is pumped downhole. Upon flowback, samples are collected and analyzed for tracer
concentration. With the use of the mass balance method the flowback efficiency for each stage is calculated.
These precise flowback calculations yield a more accurate assessment of cleanup efficiency. This paper presents
several case histories in which the technique was implemented. Results and fracture flowback prognoses are
presented. The results are also used to assess post-frac performance as a function of flowback efficiency.
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Reserves Are Added By Re-Thinking a 1983 Steamflood Pilot
Authors D.G. Nelson and M.J. EconomidesA 1983 steamflood pilot project was abruptly terminated in the Edison Field in California. Recently discovered and reinterpreted
information suggests that the decision was unjustified. A critical review of the pilot and the original steamflood
simulation along with a comparison of actual field measurements make it clear that the steamflood should be reconsidered,
and in the process, greatly adding to the field oil reserves.
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State-of-the-Art BHA Program Produces Unprecedented Results
Authors D.C-K. Chen and M. WuThis paper presents the development of a new bottomhole
assembly (BHA) program and how it is used to deliver
optimal BHA design. The new program allows users to run
static and dynamic models in the same application which will
save time and minimize errors.
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Acoustic Thin-bed Analysis to Enhance Stoneley Permeability and Mechanical Properties Processing in Laminated Carbonate Reservoirs
Authors J.A. Franquet, S.A. Al-Arfi and A.H.A. AmiriThis paper presents an acoustic thin-bed analysis in a
laminated carbonate reservoir in order to enhance the
Stoneley-wave permeability estimation and the rock
mechanical characterization. The results of the enhanced
acoustic characterization were corroborated and validated
by a wireline acoustic image log.
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Diagnosis of Excessive Water Production in Horizontal Wells Using WOR Plots
Authors M.A. Al Hasani, S.R. Al Khayari, R.S. Al Maamari and M.A. Al WadhahiMany oil fields in Oman are developed with horizontal wells
to maximize productivity and develop wider drainage areas for
more cost effective recovery. Premature water breakthrough
either from water injectors or from water aquifer reduces the
wells profitability because of both reduction in net oil rate and
additional cost for water handling. To determine the best
solution to shut-off, source and nature of the water entries
must be well identified.
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Comprehensive Mini-Frac Testing in the Gullfaks Field as a Tool for Characterization of Reservoir Structure and Rock Mechanics
More LessThis paper describes the stress field and rock mechanical
aspects in the Gullfaks Field reservoirs. The data analyses are
mainly based on large volume water and gel “mini-fracs”
associated with data gathering in conjunction with propped
fracture stimulation jobs. A few data points represent results
from Pump-In/Decline Tests after perforating/before start-up
of single zone water injectors. The data are based on “state of
the art” mini-frac analysis techniques which also are discussed
in this paper.
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A Monte Carlo Approach to Value of Information Evaluation
Authors Ø. Arild, H.P. Lohne and R. BratvoldThe value of information (VOI) methodology can be used for determining whether further information should be collected
before making a decision. Typically, a VOI is calculated on an expected monetary value (EMV) basis by means of a decision
tree, and the cost of the information is compared to the VOI to determine whether to undertake further data collection. A
majority of VOI studies employ the discrete decision tree approach to VOI evaluation, thus simplifying the problem by
reducing the range of the outcomes and the number of uncertainties addressed at the same time.
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Killing of a Gas Well: Successful Implementation of Innovative Approaches in a Middle-Eastern Carbonate Field—A Field Case
Authors S. Salehi, G. Hareland, M. Soroush, K.K. Dehkordi and F.K. SalehA casing collapse occurred in a gas producing well with about 2.5 million cubic meters per day gas flow rate at a depth of
216 ft due to tectonic movements. As a result, the well blew out and different serious procedures were put into play to kill the
well (Figure 1). This paper aims to review the practical and innovative approach that was used to secure and extinguish the
well.
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Characterization of Fracture Dynamic Parameters to Simulate Naturally Fractured Reservoirs
Authors H. Bahrami, J. Siavoshi, H. Parvizi, S. Esmaili, M.H. Karimi and A. NasiriFractures identification is essential during exploration,
drilling and well completion of naturally fractured
reservoirs since they have a significant impact on flow
contribution. There are different methods to characterize
these systems based on formation properties and fluid flow
behaviour such as logging and testing.
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Determination and Prediction of Wax Deposition from Alaska North Slope Crude Oil
Authors V.B. Kulkarni, T. Zhu and F. HvedingDue to increasing oil demand, oil companies are moving into arctic environments for oil production. Due to low temperature in
these regions, wax starts to deposit when the temperature falls below Wax Appearance Temperature (WAT). These solid wax
particles cause additional pressure drop in production tubing, pipeline and processing equipment eventually leading to
plugging. Problems associated with wax deposition are very costly due to production down time and removal of wax. Hence
accurate prediction of WAT and the amount of wax formed at given condition becomes important for sustainable operation in
this kind of environment.
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Navigating the Fog of Reservoir Uncertainties to Decision Makings with Advanced Mathematical Models in New Field Development
Authors T.R. Pham, F.A. Al-Ajmi and M.A. Al-ShehabReservoir development, most of the time coming at the
heel of an exploration effort, faces enormous challenges
in terms of uncertainties in all aspects of the event,
especially with respect to the reservoir parameters. A
survey by Bickel and Bratvold(1), highlighted the
difficulty in the industry of making the connection from
the uncertainty quantifications and analyses that are
probabilistic to decisions that are deterministic. The
survey also highlighted the observation that the decision
making process has not improved in proportion with the
industry’s capability pertaining to probability analyses.
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Combined Underground Gas Storage and Enhanced Oil Recovery in a Fractured Reservoir
Authors J. de Kok and T. ClemensThe Schönkirchen Tief reservoir is located in the Vienna Basin. The reservoir contained 19 mn m3 oil originally in place. The
current recovery factor after 45 years of production is 59 %. The field was produced by water injection. The wells, located at
the crest of the high relief structure are exhibiting a high water cut. In 2006-2007, a comprehensive study was performed to
optimise the future development of the field.
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Effective Stimulation of Carbonate Reservoirs around the World by Creating Multiple Drainage Holes
Authors R.S. Aboud, J.D. Diaz, A. Mendez, L.J. Kalfayan, L.N. Portman, R. Stanley and J.A. CurtisA new stimulation technique of limestone and dolomite wells has been successfully implemented in several regions around the
world (South America, Europe, Middle East, and South East Asia), since 2005.
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Swelling Packers: Lab Testing and Field Application
Authors A.S. Al-Yami, H.A. Nasr-El-Din, M.Z. Awang, A.S. Al-Humaidi and M.K. Al-ArfajThe best well completion is the lowest cost one that meets the demands for the well during its life time. There are different
aspects that we need to consider when designing completion such as reservoir consideration (Allen and Roberts, 2006).We
can have openhole completions, perforated casing completion, or horizontal completions. In this study, we present lab
evaluation of oil and water swelling elastomers for potential field application in Saudi Arabia fields.
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Methodology for Exploratory Offshore Wells Design and Construction, Plataforma Deltana – Venezuela Study Case
By N.L. BizzaroThe object of this project is the development of a planning model for the construction of off-shore exploratory wells. The
starting phase of the investigation comprised the assessment of seismic and geological information, drilling program, weather
and oceanographic conditions in off-shore region of eastern Venezuela.
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Low Salinity Brine Injection for EOR on Alaska North Slope (ANS)
Authors S. Patil, A.Y. Dandekar, S.L. Patil and S. KhataniarDisplacement of oil from reservoir rock pore spaces is a function of many interacting variables, among which the
reservoir wetting state has been shown to be one of the most important, which is affected by the rock lithology; oil chemistry
and brine salinity. Therefore, efficient and cost-effective oil recovery requires an understanding of the nature and, where
possible, the optimal manipulation of these interacting variables.
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Simulation on Technical Limits of Multi-Molecular-Weight Polymer Flooding in Heterogeneous Multi-Layer Reservoirs in Daqing Oilfield
Authors Z. Xiaoqin, G. Wenting, M. Nan, L. Changsen and G. SonglinBeing a heterogeneous multi-layer oilfield, Daqing Oilfield benefits remarkably from polymer flooding. However, for the low
permeability oilfields with severe multi-layer and heterogeneity problems, applying molecular weight injection technology
alone may cause uneven injection; and surface split injection may result in high cost. So, downhole separate polymer injection,
as a multipurpose adjustment measure to minimize the heterogeneity, is feasible and necessary. And Daqing has successfully
realized the downhole technology.
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