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63rd EAGE Conference & Exhibition
- Conference date: 11 Jun 2001 - 15 Jun 2001
- Location: Amsterdam, Netherlands
- Published: 11 June 2001
501 - 516 of 516 results
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The role of capillary effects - waterflooding efficiency in heterogeneous sandstone reservoirs
Authors L. Surguchev and B. AndersenCapillary forces govern oil flow in the porous medium. Wettability of the rock determines efficiency of oil displacement by injection agents. But, due to lack of reservoir data, complexity of the physical process and traditional simplistic simulation approach the role of capillary effects and zone rock properties is often neglected. This leads to inaccuracy in modelling reservoir sweep and oil displacement in heterogeneous reservoirs.
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Improved oil productivity by selective water control
Authors A. Stavland, A. Lohne and A. OlsenThis paper discusses a simple and cost effective method for selective water control using an oil soluble surfactant system. Bullhead injection of this system forms a blocking emulsion at high water cut without any permeability reduction at low water cut.
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Restriction of water production in gas wells using alcohol-containing polymer solutions
Authors I. Lakatos, J. Lakatos-Szabó, B. Kosztin and G. PalásthyGas production from gas fields and underground gas storage is usually accompanied by substantial water production. The high water production and limitations of water liquidation jointly deteriorate the recovery efficiency and hamper maintaining an environmentally friendly production.
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Comparison of polymer and waterflood residual oil saturations
Authors D. J. Element, S. G. Goodyear, N. C. Sargent and A. J. JayasekeraPolymer flooding can increase recovery in vissous oil fields compared to waterflooding, through a combination of improvements in microscopic sweep (lowering the effective residual oil saturation) and areal and vertical sweep (reducing the detrimental effect of heterogeneity and gravity slumping of injected water).
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Geological fundamentals for using the methods for Improved Oil Recovery in the fields of Volga-Ural oil-and-gas province
Authors N. A. Lebedev, A. N. Shakirov, G. I. Vasyasin and V. V. ChendarevBy the present many different technologies for oil recovery increase have been tested on commercial scale. The technological effect of their use in the same deposits often varies greatly preventing the objective and statistically reliable evaluation of the technologies' efficiency. That means that the efficient commercial use of the tested technologies for the physical and chemical treatment is not feasible under the changed conditions without establishing the detailed scientific geological fundamentals for their use.
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The use of distributed well temperature measuremens in waterflood management
Authors D. J. Element, S. G. Goodyear and C. BlenkinsopFibre optic sensor technology is being increasingly used by the oil industry. Optical fibres can be permanently installed in a well, providing distributed real time temperature data at a one-metre resolution. This paper investigates the link between the temperature distribution in the well and the reservoir performance. A range of fine grid reservoir simulations have been examined to study the temperature changes in a production well over the course of field history, aiming to assess the potential value of accurate distributed well temperature data for management of reservoir waterfloods.
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Pulse injection technology for IOR
Authors A. S. Cable, M. P. Dorey, S. G. Goodyear and A. J. JayasekeraThis study investigated the effects of pressure pulsing on laboratory SCAL measurements using an unconsolidated and consolidated sand, refined oils and y-ray in-situ saturation monitoring (ISSM). Published literature presented at the 1999 European lOR Symposium has suggested that under pulsed flow conditions, Darcy's law may no longer be a valid description of single phase flow and that suppression of viscous fingering may allo lead to significant improvement in oil productivity.
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Dacion field rehabilitation
Authors M. Frorup, S. Adams, N. Charlwood and R. WoodThe Dacion field, which is located in the eastern Venezuelan basin, came on production about 50 years ago. In the early years of development more than 300 wells were drilled and production reached a peak of 45000 bbl/D of oil at about 1958. After that the drilling slowed down and the field was operated on a race maintenance basis. By 1997 the rate had fallen to approximately 11500 bbl/D. In 1998 Lasmo Venezuela took over operations of the Dacion field after the third Venezuelan licensing round lead by PDVSA and has, in two years, more than tripled the production at takeover. The field rehabilitation to date has been based on drilling of additional replacement and infill wells as well as increasing the overall water production.
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Combination of enhanced oil recovery and near zero CO2 emission power plants
Authors C. Schroeder, S. Houyou, P. Illing, P. Mathieu and A. MonjoieThis paper addresses two basic today's issues, namely the release of CO2 in the atmosphere from fossil fuels combustion and the depletion of fossil fuels resources. The objective here is double: mitigate the CO2 emissions and increase the resources of fossil fuels.
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Foam assisted WAG, a summary of field experience at the Snorre Field
Authors A. Skauge, L. Rasmussen, T. Blaker, H. Celius, H. A. Martinsen, I. Svorstøl and M. G. AarraThe Foam Assistel WAG (FAWAG) is a large-scale demonstration of foam for gas mobility control. Foam has been applied at the Snorre field several times, first as a production well treatment, thereafter in a large scale gas mobility control proces.
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Optimum rock bit program selection by integrated geostatistics and artificial intelligence
Authors S. Akin, S. Yilmaz and C. DemirciogluOptimum bit selection is one of the important issues in drilling engineering. Usually, optimum bit selection is determined by the lowest cost per foot and is a function of bit cost and performance as well as penetration rate.
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Physico-chemical IOR method for cyclic steam stimulation of high-viscosity oil reservoir
Authors V. A. Kuvshinov, L. K. Altunina and V. V. KuvshinovTechnology has been developed to improve the efficiency of steam-cyclic treatment of wells in high-viscosity oil fields using chemical reagents.
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Thermal gas-dynamical technologies for recovery of viscous oils - application experience
Authors Y. I. Stashok, D. G. Antoniadi, G. G. Gilaev and E. A. LysenkovPresented in the paper are the basic results of pilot-commercial introduction of technological processes for production of vissous oils.
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Influence of collector's irreversible deformation on oil recovery
Authors N. A. Cheremisin, V. P. Sonich and P. A. EfimovThe rocks of hydrocarbon deposits consisting of granular reservoirs and occurring on their historical maximum depth are subject to an additional stress at a reservoir pressure drop during their development. This additional stress leads to not only the elastic but also to the plastic deformation of rocks. Based on the laboratory and theoretical studies results it is shown that the irreversible deformation has a considerable influence on the deposit performance changing not only reservoir properties and a ratio of the fluids saturating the rocks, but also on the oil recovery.
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The application of magnetic liquide treatment in oil fields of West Siberia
Authors O. V. Gavriluk and O. V. GlazkovThe formations of asphalt-resin-paraffin (ARPD) and saline deposits in the tubing string (TS) and in delivery lines are considered as the most urgent problems arising during exploitation of some oil fields in West Siberia. As a consequence - increased equipment failures, shortened cleaning (CP) and overhaul (OP) periods of well operation, as well as the increased pulling the tubing for cleaning and partial replacement causing production tosses and unavoidable environment pollution.
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Current statue and prospects of EOR methods and oil production - intensification in the fields of OJSC "Surgutneftegaz
Authors G. A. Malyshev, V. P. Sonich and D. F. SedachOne of the first priority trends of OJSC Surgutneftegaz's activities is an oil recovery enhancement and oil production intensification. During the period from 1990 to 2000 more than 53 thousand well operations were performed using about 60 various techniques that resulted in production of more than 60 million tops of incremertal oil. The annual increase in the volumes of EOR methods application is more than 20%, which allowed for planning an increase in oil production during the period from 2000 to 2015 of more than 160 million tons.
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