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IOR 2007 - 14th European Symposium on Improved Oil Recovery
- Conference date: 22 Apr 2007 - 24 Apr 2007
- Location: Cairo, Egypt
- Published: 22 April 2007
21 - 40 of 47 results
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Impact of Brine Chemistry on Oil Recovery
Authors A. Lager, K.J. Webb and C.J.J. BlackA24 Impact of Brine Chemistry on Oil Recovery A. Lager* (BP) K.J. Webb (BP) & C.J.J. Black (BP) SUMMARY Since its accidental discovery at the beginning of the 20th century waterflooding has become the most successful form of oil rcovery and the vast majority of oil fields without an active aquifer or with a partial water drive are or will be under waterflood. Waterflooding is considered by the majority of reservoir engineers as a technique for pressure maintenance to energise the reservoir and as such the majority of waterflooding research has been conducted on fluid mechanics and the physics behind
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Microbial Enhanced Oil Recovery: A Review with special reference to Uneconomical/Marginal Reserves
Authors S. Zahid, H.A. Khan, M.F. Idrees and U. AsimA25 Microbial Enhanced Oil Recovery: A Review with special reference to Uneconomical/Marginal Reserves S. Zahid* (University of Engineering & Technology) H.A. Khan (University of Engineering & Technology) M.F. Idrees (University of Engineering & Technology) & U. Asim (University of Engineering & Technology) SUMMARY Oil and natural gas are vital for any economy and the importance of these resources in determining the social stability and economic viability of a nation is enormous. As the search for petroleum continues recovery of known reserves must be improved if the goal of avoiding shortages is to be met. In today’s energy sector the high
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Bugs for Oil? Potential of MEOR in Selected Australian Reservoirs
Authors A.K. Becis, H.K. Sarma and B. SetiadiA26 Bugs for Oil? Potential of MEOR in Selected Australian Reservoirs A.K. Becis* (University of Adelaide) H.K. Sarma (University of Adelaide) & B. Setiadi (Santos Ltd) SUMMARY Microbial Enhanced Oil Recovery (MEOR) is an Enhanced Oil Recovery (EOR) process with no applications in Australia. However there have been limited successful applications world-wide most notably in China USA Venezuela and Eastern Europe. The varied nature of MEOR applications suggest that possibilities should also exist in Australian reservoirs. MEOR involves the use of microbes their metabolic activities and by-products to improve the recovery of oil from the reservoir. It also encompasses microbial
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Performance of Ivanhoe Energy's HTL Crude Oil Upgrading Process
Authors N. Malpiede, E. Veith and J. KuhachA27 Performance of Ivanhoe Energy's HTL Crude Oil Upgrading Process N. Malpiede* (Ivanhoe Energy) E. Veith (Ivanhoe Energy) & J. Kuhach (Ivanhoe Energy) SUMMARY Ivanhoe Energy’s proprietary heavy oil to light oil (HTL) upgrading technology is designed to cost effectively process heavy oil in the field and provide a stable significantly upgraded synthetic oil product along with by-product energy which can be used to generate steam or electricity. Analysis shows that HTL can virtually eliminate cost exposure to natural gas and diluent and capture the majority of the heavy to light price differential for oil producers. HTL accomplishes this at
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Preparing a Fractured Carbonate Field for Steam Injection
Authors B. Wassing, J. Van Wunnik, G. Warrlich, A. Lamki, T. Johnson, J. Gittins and M. RiyamiB01 Preparing a Fractured Carbonate Field for Steam Injection B. Wassing* (PDO) J. Van Wunnik (PDO) G. Warrlich (PDO) A. Lamki (PDO) T. Johnson (PDO) J. Gittins (PDO) & M. Riyami (PDO) SUMMARY The subject field is a fractured carbonate reservoir located in the Ghaba Salt Basin in Oman containing heavy viscous oil. The field was discovered in 1972 and has been producing since 1976 through a process of mainly fracture depletion and natural water-influx. Without the application of an EOR technique the recovery will be low as the processes that displace oil from the matrix reservoir rock are adversely
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Pilot Tests of IOR-Technology Alternating Thermal-Steam and Physicochemical Treatments of High-Viscosity Oil Pools with oil-displacing systems
More LessB02 Pilot Tests of IOR-Technology Alternating Thermal-Steam and Physicochemical Treatments of High-Viscosity Oil Pools with oil-displacing systems L.K. Altunina* (Russian Academy of Sciences) SUMMARY To increase efficiency of thermal-steam and cyclic-steam treatments of high-viscosity oil pools we propose to combine them with physicochemical methods. Therefore IOR-technology has been developed to alternate thermal-steam and physicochemical treatments of high-viscosity oil pools with oil-displacing systems to improve oil recovery. Oil-displacing systems contain surfactants and at thermal stimulation they generate CO2 and alkaline buffer solution in situ. Use of such systems decreases oil viscosity interfacial tension and clay swelling and simultaneously increases mobility of
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Pilot Tests of Gel-Technology for Water Shutoff
More LessB03 Pilot Tests of Gel-Technology for Water Shutoff V.A. Kuvshinov* (Russian Academy of Sciences) SUMMARY Thermal-steam treatment of oil pool by means of stationary or cyclic steam injection is considered as the most effective out of all current methods for high-viscosity oil production. However problem consists in low coverage by steam injection and decreased efficiency of thermal-steam treatment at later stage of oil field development. We propose to increase efficiency of thermal-steam treatment combining it with physicochemical methods using gel-forming and oil-displacing systems. Gels increase coverage by steam injection and oil-displacing systems provide extra displacement of oil. Technologies have been
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Water Flooding of Carbonate Reservoirs – Effects of a Model Base and Natural Crude Oil Bases on Chalk Wettability
Authors T. Puntervold, S. Strand and T. AustadB08 Water Flooding of Carbonate Reservoirs – Effects of a Model Base and Natural Crude Oil Bases on Chalk Wettability T. Puntervold* (University of Stavanger) S. Strand (University of Stavanger) & T. Austad (University of Stavanger) SUMMARY Polar components especially the carboxylic material in crude oil are known to have great impact on the wetting conditions of carbonates. The water-wetness decreases as the acid number AN of the crude oil increases. The success of enhanced oil recovery by water flooding in fractured carbonates is strongly depending on the wetting conditions of the formation. The impact on wettability of basic compounds
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Complex Laboratory Investigation of Fluid Flow Properties for Anisotropic Porous Media
Authors A.A. Semenov, V.V. Kadet, N.M. Dmitriev and M.N. DmitrievB09 Complex Laboratory Investigation of Fluid Flow Properties for Anisotropic Porous Media A.A. Semenov* (Gubkin Russian State University of Oil & Gas) V.V. Kadet (Gubkin Russian State University of Oil & Gas) N.M. Dmitriev (Gubkin Russian State University of Oil & Gas) & M.N. Dmitriev (Gubkin Russian State University of Oil & Gas) SUMMARY Nowadays the condition of oil development is characterized by involvement of hard recoverable oil reserves with sophisticated reservoir structure. Therefore a more adequate description of fluid flow requires taking into account the anisotropy of porous media. At the heart of our work lies an assumption based
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The Impact of Fault Rocks on Improved Oil Recovery
Authors S.M.S. Al-Hinai, Q.J. Fisher and C.A. GrattoniB10 The Impact of Fault Rocks on Improved Oil Recovery S.M.S. Al-Hinai* (University of Leeds) Q.J. Fisher (University of Leeds) & C. A. Grattoni (University of Leeds) SUMMARY Faults can severely compartmentalize reservoirs which have a significant influence in the profitability as more wells needs to be drilled. Therefore it is important to account for their effects in production simulation models. The advances in fault seal analysis have recently led to dramatic reductions in the time required to achieve a history match of production data. In addition as the history matches are more geologically-reasonable they may prove better for predicting
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Feasibility Study of SAGD for a Carbonate Heavy Oil Reservoir
Authors F. Rashidi and B. Sedaee SolaB11 Feasibility Study of SAGD for a Carbonate Heavy Oil Reservoir B. Sedaee Sola (Amir Kabir University) & F. Rashidi* (Amir Kabir University) SUMMARY Steam injection is the most important thermal enhanced oil recovery method in sandstone reservoirs and in this method Steam-Assisted Gravity Drainage (SAGD) is a very effective in mobilizing of heavy oil and achieving high recovery from thick and high permeability reservoirs. The method creates short distance and stable displacement of steam and increases production rates by using gravity force as a driving potential and a pair of horizontal wells for Injection/production. SAGD in Sandstone oil Reservoirs
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Flow Regimes of Heavy Oils under Water Displacement
Authors E.S. Vittoratos Inc., C.C. West Inc. and C.J. BlackB12 Flow Regimes of Heavy Oils under Water Displacement E.S. Vittoratos* (BP Exploration (Alaska) Inc.) C.C. West (BP Exploration (Alaska) Inc.) & C.J. Black (BP Sunbury) SUMMARY We have examined the production data from heavy oil reservoirs produced by waterflooding. Previous observations from a waterflooded heavy oil reservoir on the North Slope of Alaska have indicated sequential flow regimes characterized by steps in the Water Oil Ratio (WOR) vs Cumulative Recovery curve. The most prominent feature is a period with a constant WOR near one of variable duration but often persisting for many years; this is followed by a large
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Complex Thermodynamic Behaviour to Assess the Performance of Solvent Injection into Heavy Oil
Authors N. Guillonneau and G. DarcheB13 Complex Thermodynamic Behaviour to Assess the Performance of Solvent Injection into Heavy Oil N. Guillonneau* (TOTAL) & G. Darche (TOTAL) SUMMARY Injection of gaseous solvent in heavy oil reservoirs might be an alternative recovery technique as compared to thermal processes. Several uncertainties remain on the physical behaviour of the solvent-oil interaction: amount of diffusion/dispersion gravity and capillary effects nature of the thermodynamic equilibriums. This paper will address some of these uncertainties through the history match of a coreflood experiment in order to tune some of the physical parameters. This experiment was performed by injecting a C2 – C3 gas
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Optimal Economic Strategies for SAGD+Solvent Processes
By G. DarcheB14 Optimal Economic Strategies for SAGD+Solvent Processes G. Darche* (TOTAL SA) SUMMARY The SAGD process (Steam Assisted Gravity Drainage) is currently favoured for developing bitumen fields and also shows potential to develop mobile heavy oils beyond the economic performances of classical cold production. However to reduce steam injection needs and increase recovery associated to SAGD engineers are trying to improve SAGD by adding extra fluids to the injected steam. One of the most promising techniques ES- SAGD consists in adding condensable solvents to the steam which still reduces the bitumen viscosity and improves the oil recovery. In this paper we
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A Pre-Feasibility Study in View of an IOR/EOR Pilot in a Heavy Oil Field in the Western Desert (Egypt)
Authors S. Renna, G. Fanello, A. Godi, A. Badr and E. El MoutyB15 A Pre-Feasibility Study in View of an IOR/EOR Pilot in a Heavy Oil Field in the Western Desert (Egypt) S. Renna* (ENI E&P) G. Fanello (ENI E&P) A. Godi (ENI E&P) A. Badr (AGIBA) & E. El Mouty (AGIBA) SUMMARY The field located in the Egyptian Western Desert is mineralised at heavy oil (16°API 23 cP@RC)and it shows a current recovery factor of 1%. The objective of this study was to increase the oil production by investigating the applicability of different IOR/EOR techniques thermal and chemical methods included. The achievement of this goal went through the following steps: 1.Preliminary
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Steam Flooding a 200 m Thick Clastic Heavy Oil Reservoir
Authors V. van Engelen, S. Al-Harthy and J. van WunnikB16 Steam Flooding a 200 m Thick Clastic Heavy Oil Reservoir V. van Engelen* (PDO) S. Al-Harthy (PDO) & J. van Wunnik (PDO) SUMMARY The discussed field is located in South Oman and contains a 200m thick column of heavy oil in sandstone reservoir at a depth of 1150m below surface. The field has been in production for 20 years and is currently in decline. A pattern steam flood re-development is proposed potentially doubling or tripling ultimate recovery. The extreme thickness of the heavy oil reservoir (up to 200m) is unique and poses both opportunities as well as challenges. Given
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Fundamentals Solutions for Steam and Nitrogen Injection
Authors D. Marchesin, W. Lambert and J. BruiningB17 Fundamentals Solutions for Steam and Nitrogen Injection W. Lambert (IMPA - Instituto de Matematica Pura e Aplicada) D. Marchesin* (IMPA-Inst. De Matemat. Pura e Aplicada) & J. Bruining (Dietz Laboratory Centre of Tech. Geos. Tudelft) SUMMARY Steam is applied to recover oil and to clean up oil spills. However the a steam temperature is often unnecessary and adds to costs in the case of oil recovery and killing bacteria worms etc. which play a vital role in a "life" soil in environmental applications. Coinjection of an inert gas (nitrogen carbondioxide) would be able to keep the temperature low. Moreover
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Testing a Giant Light Oil Reservoir for Steam Flooding
Authors F. Van Beek, R. Hamm, D. Green-Armytage, S. al Ghafri and M. al GharbiB18 Testing a Giant Light Oil Reservoir for Steam Flooding F. Van Beek* (PDO) R. Hamm (PDO) D. Green-Armytage (PDO) S. al Ghafri (PDO) & M. al Gharbi (PDO) SUMMARY An accelerated steam injection development is planned for a limited area of a giant oil field in Oman. The prime objective of this 1st Phase is to prove the development concept of steam injection in this light oil fractured carbonate reservoir. Unlike traditional heavy oil steam floods a complex interplay of recovery mechanisms have been identified leading to a large range of incremental oil forecasts. Hence proof of concept is
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Wettability Modification of Oil-Wet Rock – Modelling and Experiments
Authors W.M. Stoll, J.P. Hofman, D.J. Ligthelm and M.J. FaberB19 Wettability Modification of Oil-Wet Rock – Modelling and Experiments W.M. Stoll* (Shell International EP B.V.) J.P. Hofman (Shell International EP B.V.) D.J. Ligthelm (Shell International EP B.V.) & M.J. Faber (Shell International EP B.V.) SUMMARY An oil-saturated oil-wet rock does not naturally imbibe brine. In order to release its oil in place an external viscous pressure gradient must be applied that overcomes the capillary pressure. If however the rock is pervasively fractured such a pressure gradient cannot be established and the oil remains inaccessible to traditional IOR techniques. Recently a new concept termed “wettability modification” of oil-wet reservoirs has
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EOR Methods to Enhance Gas Oil Gravity Drainage - Modeling Aspects
Authors P.M. Boerrigter, M.L. Verlaan and D. YangB20 EOR Methods to Enhance Gas Oil Gravity Drainage - Modeling Aspects M.L. Verlaan (Shell International Exploration & Production) P.M. Boerrigter* (Shell International Exploration & Production) & D. Yang (Shell Canada Energy) SUMMARY Conventional displacement methods such as water flooding do not work effectively in densely fractured reservoirs: due to the high fracture permeability it is not possible to establish significant pressure differentials across oil bearing matrix blocks to drive oil from matrix rock towards producers. In such reservoirs one has to rely on natural mechanisms like capillary imbibition or gravity to recover oil from the matrix reservoir rock. In
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