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IOR 1997 - 9th European Symposium on Improved Oil Recovery
- Conference date: 20 Oct 1997 - 22 Oct 1997
- Location: The Hague, Netherlands
- ISBN: 978-90-73781-08-5
- Published: 20 October 1997
41 - 60 of 72 results
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Optimisation and Risk Assessment of a Water Shut-Off Treatment in a Wytch Farm Horizontal Well
Authors D. J. Franklin, J. R. Todd, C. L. Woods and B. R. GaneLimitations on water handling capacity at Wytch Farm mean high water-cuts from horizontal wells could lead to toss of oil production. To avoid this, a pilot study has been undertaken on a single horizontal well, to investigate the potential for a water shut-off treatment and estimate the associated risk. The study has shown that a water shut-off treatment early in 1997 should be economically beneficial to the performance of the field as a whole. Conditions that would reduce the return on the treatment have been identified and can be avoided by optimising the strategy, increasing the robustness of the project.
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Well Shut-Off Treatments - Near Well Simulation and Evaluation
More LessMany North Sea reservoirs are produced with waterflooding, gas or Water-Alternate-Gas (WAG) injection schemes. Non conformance of flooding, gravity override or underride, and the presente of the high permeable thief zones cause premature water or gas breakthrough problems in production wells.
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Placement Simulations Improve the Design of Water Shut-Off Treatments
Authors M. Hardy, D. van Batenburg and W. BotermansIn the past, high-volume water shutoff treatments have not been applied because of the economic burdens they incur. Today, many operators have reconsidered high-volume water shutoff treatments because these treatments make oil production from mature reservoirs more economically feasible. Many wells in mature North Sea reservoirs produce a large amount of water. Consequently, these wells often produce less oil than they potentially could.
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A Successful Immiscible CO2 Field Pilot in a Carbonate Heavy Oil Reservoir in the Ikiztepe Field, Turkey
Authors H. Ishii, H. K. Sarma, K. Ono and K. IsseverAn immiscible CO2 field pilot was completed successfully by Japan National Oil Corporation (JNOC) and Turkish Petroleum Corporation (TPAO) in a collaboration with the Japan EOR Research Association (JEORA) in the Sinan heavy oil reservoir in the Ikiztepe field, Turkey.
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Polymer Velocity Enhancement and Accumulation at Water Oil Interfaces
Authors G. A. Bartels, J. Bruining and P. ZithaAn important aspect in polymer flooding is the existence of inaccessible and excluded pore volume in the reservoir. This leads to velocity enhancement i.e. polymere move faster through the porous medium than the water in which they are dissolved. In the conventional description the velocity enhancement factor is taken to be constant. We derived new model equations based on a percolation model. It turns out that the velocity enhancement factor can be expressed in terms of relative permeabilities and is therefore saturation dependent. This results in an accumulation of polymers at the oil interface. We verified the the theoretical findings with two-phase polymer flow experiments. Our experimental results show indeed a considerable pile-up of polymers at the interface.
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An Experimental and Numerical Study of Polymer Action on Relative Permeability and Capillary Pressure
Authors P. Barreau, D. Lasseux, H. Bertin, P. Glénat and A. ZaitounInjection of polymer or gels in oiI or gas production wells is commonly used, among other techniques, to reduce the water cut when excessive water production occurs.
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Role of Polymer Adsorption and of Petrophysical Properties in Water-Cut Control Treatments by Polymer Injection in Gas Wells
Authors L. Chiappa, A. Mennalla and M. OrtolaniControlling water production is an increasing concern to oil companies as currently developed hydrocarbon fields mature. Reduced well productivity, increased costs associated to produced water treatment and premature well abandonment (in gas fields) are typical drawbacks caused by excessive water production.
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Water Shut-Off by Disproportional Reducing Gel - a Case Study
Authors K. O. Hettervik, S. R. Jakobsen, B. Schilling and A. StavlandApplications of disproportional permeability reducing (DPR) gel is discussed in this paper.
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Gravitation in Thermal EOR - How Disadvantage Can Be Used to Improve Efficiency of Thermal EOR
Authors D. G. Antoniady, A. A. Boxerman, A. R. Garushev and Y. I. StashokIt is a matter of general experience that gravitational effects arising during injection of air or steam most often affect adversely the efficiency of thermal EOR methods. Advantages of these methods are generally used where possibility exists of engineering a horizontal displacement.
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Laboratory R & D Leads to MEOR Field Pilot in Fuyu-Oilfield, China
Authors H. Yonebayashi, H. Enomoto, K. Fujiwara and C. -X. HongA MEOR field test is being conducted in Fuyu-oilfield, China to increase oil recovery from a mature reservoir through the waterflood for over 20 years.
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Evaluation of Post Stream Scenarios and Infill Potential
Authors G. Fabel, P. M. Nilsson, T. Scheer and C. A. KossackBEB operates six steam drive projects in Northwest Germany with a total of 18 steam injectors and 140 producers in two oilfields (25° API, 120-140 mPa•s). The first project, Georgsdorf SD1, was started in 1975 and until mid 1996 about 0.75 pore volumes (PV) of steam have been injected. Earlier analyses showed that the oil steam ratios peaked at an injection volume of 0.35 PV and were slowly decreasing afterwards. However, there was no experience on when to end steam injection and how to proceed in the most efficient way. Since the few accessible case histories were not directly applicable, simulation models were used to analyse some key issues, listed below, which are critical to the future economics of all steam drive projects.
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Enhanced Oil Recovery with Waste Products from Thermal Plastics Recycling
Authors M. Fink and J. K. FinkPlastics recycling has become a major challenge because either resources are restricted or because of the increasing problems of waste disposal management, which nowadays is deeply linked to environmental aspects. Various different routes have been invented and are actually in use, covering the range from material recycling, chemical recycling, to energy recycling.
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Vibroseismic Stimulation for Rehabilitation of Highly Watered Reservoirs
More LessCorrelation between oil rates and earthquakes was observed in the 1970s. It resulted in first attempts to use the energy of seismic waves to mobilize residual oil spreaded in the reservoir in the form of drops of different sites, and to rehabilitate depleated oil fields with high water production.
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Microbial EOR - Hopes and Disappointments
Authors I. M. Ametov and S. V. KaluzhnyAt present time MEOR is considered as one of the most promising methods. But though research in this area have been already conducting for several decades, these methods have not reached large scale application in spite of many positive laboratory and especially field tests results.
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A New Horizontal Well Concept for IOR from Light Oil Reservoirs Using Air Injections
Authors M. Greaves and A. M. SaghrThere is growing interest in the application of air injection in deep light oil reservoirs, especiaily in remote locations and offshore. Air represents a cheap source of injection gas, and with low temperature oxidation (LTO) the oxygen is generating an in situ source of N2 or `flue gas' to carry out immiscible or miscible displacement processes. If the oil and reservoir matrix are sufficientiy reactive, high temperature oxidation (HTO) can be implemented to sustain fully-propagating in situ combustion, with excellent improved oil recovery (IOR).
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Chemical Flooding - a Technological, Economical and Effective Method for Enhanced Oil Recovery in China
More LessMost of the oil fields in China are discovered in Continental Sedimentary basins with fluvial-delta and alluvial fan-fan delta sedimentary systems.
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Tenguiz Oil Field - Recovery Prediction by Expansion Above the Bubblepoint
More LessThe Giant Tenguiz oil field in Kaazakhstan was discovered in 1981 and put into development in 1991. The primary drive mechanism is of rock compaction and fluid expansion is above the bubblepoint. Due to anomal high initial reservoir pressure and large differente between initial reservoir pressure and saturation pressure, a record-high oil recovery is expected.
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Thermoreversible Polymer Gels for EOR
Authors L. K. Altunina, V. A. Kuvshinov, L. A. Stasyeva, Y. A. Poddubny and V. V. GusyevPhysico-chemical control of filtration flows in the formation is considered to be a promising method to enhance oil recovery in oil fields developed by flooding. The methods increasing conformance by the injected fluid (water and gas) have been found to be the most effective in West Siberia. At a later stage of flooding physico-chemical control of filtration flows in heterogeneous reservoirs is carried out by selective isolation, i.e. blocking of well drainaged and highly permeable zones, causing the drowing of producing wells. It is convenient to employ gels with controled generation time [1, 2].
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Using Formation Damage as a Tool to Alleviate Near Wellbore Water Influx
Authors I. Ionescu, I. Dragoi, L. Olarasu and F. BaltoiuThis paper presents a laboratory based method that minimizes the water influx info the production wellbore by controlling induced fines and plugging mechanisms. Rock pore size distribution, lnduced particle size distribution and their wettability, relative permeability before and after mud circulation will be the milestones in the proposed proces.
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Biopolymer Flooding Pilot Test on the High Viscous Oil Field
More LessPolymer flooding (Polyactrylamide) bas been successfally conducted in oil fields of China in recent years and on the basis of these pilot tests, the extend demonstration test and the commercial application has been carried out. These efforts and achievements have helped to for enhancing oil recovery and stablizing oil production in these oil fields.
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