A Study on the Recovery Factor Estimation of Water Flooding for a Heterogeneous Multi-layered Oil Reservoir

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2011 Vol.48, Issue 5 Preview Page Next Page

A Study on the Recovery Factor Estimation of Water Flooding for a Heterogeneous Multi-layered Oil Reservoir 수공법 적용 시 불균질 다층 석유저류층의 회수율 평가: 신창훈, 이영수, 백영순, 이정환
Changhoon Shin, Youngsoo Lee, Youngsoon Baek and Jeonghwan Lee

31 October 2011. pp. 639-647

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Abstract

It is known that waterflooding is one of the most effective secondary oil recovery methods. In applying waterflooding, the estimation of the RF(recovery factor) or EUR(estimated ultimate recovery) can be a main concern in the aspects of Engineering. The analysis of the heterogeneous multi-layered oil reservoir like our research case is regarded as more difficult, especially in case that there’s no crossflow between vertical sub-layers. For this reason, we tried to survey several theoretical and experimental analysis methods for an oil recovery factor of the water flooded reservoir. Upon investigation, we found two appropriate analysis methods, called as Dykstra & Parsons’s method, known useful for an heterogeneous vertically multi-layered oil reservoir. And then, we fulfilled an analytic and graphical analysis to get the reasonable value of RF and examined the reliability by comparing the results from the two methods. As a result, we can confirm that the two suggested evaluation methods can produce relatively reasonable values of RF and they are applicable for the calculation of heterogeneity reservoir applied waterflooding. Also, we examined the parameters that are related with waterflooding application in an oil field operation and yielded several important values for the verification of the reliability for reservoir simulation model and analysis result.

Keywords

Waterflooding

Reservoir heterogeneity

Multi-layer oil reservoir

Recovery factor estimation

Vertical crossflow

수공법은 가장 효과적인 유전의 생산증진방법 중의 하나로 알려져 있다. 수공법 적용에 있어서, 가장 관심이 되는 공학적인 변수는 수공법을 통해 궁극적으로 얼마만큼의 석유를 증산할 수 있는가하는 궁극회수량 또는 회수율의 산정이다. 특히, 본 연구대상과 같이 수직지층간의 교차유동이 발생하지 않는 불균질 다층 석유저류층의 경우는 해석이 더욱 까다롭다. 이에 본 연구에서는 불균질성이 큰 수직다층 석유저류층의 회수율 산정을 위하여, 선행연구자들로부터 제안된 수공법 적용시 회수율 산정을 위한 다양한 이론적, 실험적 해석방법을 조사하고, 실제 운영 중인 유전에 대한 적용을 시도하였다. 이를 위해 Dykstra와 Parsons가 제시한 이론적 해석방법과 도해적 해석방법을 적용하여 불균질 다층 석유저류층에서 회수율을 산출하고, 두 방법의 상호비교와 신뢰성 검토를 위한 해석을 수행하였다. 검토결과, 이러한 저류층의 해석에 있어 Dykstra와 Parsons의 두 가지 해석방법의 적용이 가능하며, 동일한 범위의 회수율 평가 결과를 산출함으로써, 불균질 저류층에 수공법이 적용되는 경우, 타당한 수준의 회수율 평가가 가능함을 확인하였다. 아울러 실제 현장의 운영을 위한, 수공법 적용과 관련된 공학적 변수들을 검토하고, 향후 저류층 해석모델과 시뮬레이션 해석결과의 신뢰성 검증에 필수적인 주요 공학적 변수들을 도출하였다.

키워드

수공법

저류층 불균질성

다층 석유저류층

회수율 평가

수직 교차유동

References

류상수, 2000, “천이유동시 다층 저류층에 대한 단일저류층으로의 모델링방법,” 한국자원공학회지, 제37권 2호, pp. 138-147.
이영수, 김기홍, 권순일, 황상훈, 서준우, 이태훈, 설창현, 성원모, 2009, “다중 저류층의 층별 생산량 규명 연구,” 한국지구시스템공학회지, 제46권 4호, pp. 482-489.
허대기, 김현태, 1996, “수공법에서의 저류층간 교차흐름 연구,” 한국자원공학회지, 제33권 5호, pp. 391-397.
Arps, J.J., 1956, “Estimation of Primary Oil Reserves,” Trans. Am. Inst. Mining Met. Engrs., Vol. 207, pp. 182-191.
Buckley, S.E. and Leverett, M.C., 1942, “Mechanism of Fluid Displacement in Sands,” Trans. AIME, Vol. 146, pp. 107-116.
Carl, E.J. Jr., 1956, “Prediction of Oil Recovery by Water Flood - A Simplified Graphical Treatment of the Dykstra- Parsons Method,” SPE, 733-G, Technical Note 373.
Dake, L.P., 2001, The Practice of Reservoir Engineering (Revised Edition), Elsevier, Amsterdam, Netherlands.
Dyes, A.B., Caudle, B.H. and Erickson, R.A., 1954, “Oil Production after Breakthrough - As Influenced by Mobility Rates,” Trans. AIME, Vol. 201, pp. 27-32.
Dykstra, H. and Parsons, R.L., 1950, The Prediction of Oil Recovery by Waterflood, Secondary Recovery of Oil in US, API, 160, New York, USA.
Forrest F.C. Jr., 1971, The Reservoir Engineering Aspects of waterflooding, SPE of AIME, New York, USA.
Stiles, W.E., 1949, “Use of Permeability Distribution in Water Flood Calculations,” Trans. AIME, Vol. 186, pp. 9-13.
Suder, F.E. and Calhoun, J.C., Jr. 1949, Water-Flood Calculations, Drilling and Production Practice, API, New York, USA, pp. 260-270.
Welge, H.J., 1952, “A Simplified Method for Computing Oil Recovery by Gas or Water Drive,” Trans. AIME, Vol. 195, pp. 91-98.
Yuster, S.T. and Calhoun, J.C., 1944, “Behavior of Water Injection Wells,” Producers Monthly, Vol. 9, No. 1, pp. 40-48.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society for Geosystem Engineering
Journal Title(Ko) :한국지구시스템공학회지
Volume : 48
No :5
Pages :639-647

[1] 류상수, 2000, “천이유동시 다층 저류층에 대한 단일저류층으로의 모델링방법,” 한국자원공학회지, 제37권 2호, pp. 138-147.

[2] 이영수, 김기홍, 권순일, 황상훈, 서준우, 이태훈, 설창현, 성원모, 2009, “다중 저류층의 층별 생산량 규명 연구,” 한국지구시스템공학회지, 제46권 4호, pp. 482-489.

[3] 허대기, 김현태, 1996, “수공법에서의 저류층간 교차흐름 연구,” 한국자원공학회지, 제33권 5호, pp. 391-397.

[4] Arps, J.J., 1956, “Estimation of Primary Oil Reserves,” Trans. Am. Inst. Mining Met. Engrs., Vol. 207, pp. 182-191.

[5] Buckley, S.E. and Leverett, M.C., 1942, “Mechanism of Fluid Displacement in Sands,” Trans. AIME, Vol. 146, pp. 107-116.

[6] Carl, E.J. Jr., 1956, “Prediction of Oil Recovery by Water Flood - A Simplified Graphical Treatment of the Dykstra- Parsons Method,” SPE, 733-G, Technical Note 373.

[7] Dake, L.P., 2001, The Practice of Reservoir Engineering (Revised Edition), Elsevier, Amsterdam, Netherlands.

[8] Dyes, A.B., Caudle, B.H. and Erickson, R.A., 1954, “Oil Production after Breakthrough - As Influenced by Mobility Rates,” Trans. AIME, Vol. 201, pp. 27-32.

[9] Dykstra, H. and Parsons, R.L., 1950, The Prediction of Oil Recovery by Waterflood, Secondary Recovery of Oil in US, API, 160, New York, USA.

[10] Forrest F.C. Jr., 1971, The Reservoir Engineering Aspects of waterflooding, SPE of AIME, New York, USA.

[11] Stiles, W.E., 1949, “Use of Permeability Distribution in Water Flood Calculations,” Trans. AIME, Vol. 186, pp. 9-13.

[12] Suder, F.E. and Calhoun, J.C., Jr. 1949, Water-Flood Calculations, Drilling and Production Practice, API, New York, USA, pp. 260-270.

[13] Welge, H.J., 1952, “A Simplified Method for Computing Oil Recovery by Gas or Water Drive,” Trans. AIME, Vol. 195, pp. 91-98.

[14] Yuster, S.T. and Calhoun, J.C., 1944, “Behavior of Water Injection Wells,” Producers Monthly, Vol. 9, No. 1, pp. 40-48.

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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