All Days 2008
DOI: 10.2118/117373-ms
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Gas Utilizing Methods –A New Technology of Oil Recovery Factor Improvement

Abstract: Today, there is a clear tendency towards structure and quality deterioration of reserves. One of the reasons lies in low initial oil saturation (about 0.45–0.55 for the regions of Western Siberia). Average residual oil saturation is equal to some 0.3 (in this case displacement efficiency - 0.4). With displacement efficiency being that low, final oil recovery factor will be just over 25% even if the reservoir sweep factor can be increased to about 70%. In the mid-XX century the method of oil f… Show more

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“…But the recovery is still in a low level because of uncertainty of oil flow discipline and residual oil distribution. N 2 flooding can be used for EOR of fractured-cavity carbonate reservoir because of its high oil displacement efficiency (Poole, 1986;Karpov and Kokorev, 2008). At present, in terms of the recognition of N 2 flooding mechanism, some main aspects are listed as following (Li et al, 2008b):…”
Section: Introductionmentioning
confidence: 99%
“…But the recovery is still in a low level because of uncertainty of oil flow discipline and residual oil distribution. N 2 flooding can be used for EOR of fractured-cavity carbonate reservoir because of its high oil displacement efficiency (Poole, 1986;Karpov and Kokorev, 2008). At present, in terms of the recognition of N 2 flooding mechanism, some main aspects are listed as following (Li et al, 2008b):…”
Section: Introductionmentioning
confidence: 99%