Experimental Observation of Varying Oil Viscosity on Oil Recovery by CO2 Injection

doi:None

All Issue

2012 Vol.49, Issue 4 Next Page

Research Paper

Experimental Observation of Varying Oil Viscosity on Oil Recovery by CO₂ Injection CO2 주입 시 오일의 점성도에 따른 회수율에 대한 실험적 고찰: 오주영·전보현·유형석
Juo Young Oh, Bo Hyun Chon and Hyung Seok Yu

31 August 2012. pp. 521-530

PDF

Abstract

This study presents to evaluate oil recovery related to two kinds of crude oil which have different viscosities by miscible and immiscible WAG. VGH was used as relatively heavy oil and KWT was used as lighter oil. To estimate the pressure conditions for miscible and immiscible processes, MMP was measured by slim-tube apparatus. It showed that VGH needed higher MMP than KWT. In WAG, KWT showed higher than VGH and Miscible processes were more effective than immiscible in oil recovery, respectively. The residual CO2 saturation in the core was the highest in miscible WAG with KWT than any other processes. To improve the efficiency of immiscible WAG with VGH that showed the lowest oil recovery, CO2 injection rate was increased at each injection cycle. As a result, it showed higher oil recovery and injection efficiency than conventional immiscible WAG.

Keywords

WAG

Miscible process

Immiscible process

MMP

Oil recovery

본 연구에서는 WAG 공법을 이용하여 혼합 공정 조건과 비혼합 공정 조건에서 각각 점성도가 다른 두 원유의 회수율 차이를 확인하였다. 비교적 점성도가 높은 원유로는 VGH, 점성도가 낮은 원유로는 KWT 원유를 사용하였다. 혼합 공정과 비혼합 공정의 압력조건을 설정하기 위해 슬림튜브 장치를 이용하여 MMP를 측정하였고 VGH 원유가 KWT 원유보다 CO2와의 혼합 압력이 더 높은 것으로 나타났다. WAG 공법 적용 시, KWT 원유가 VGH 원유보다 회수율이 높게 확인되었고 혼합 공정이 비혼합 공정보다 높은 오일 회수율을 나타냈다. 코어 내 CO2 잔류 포화도는 KWT 원유에 적용한 혼합 WAG 공법에서 가장 높게 나타났다. 오일 회수율이 가장 낮게 나타났던 VGH 원유에 대한 비혼합 WAG 공법의 회수율을 높이기 위해 CO2의 주입유량을 매 주입주기마다 올려준 결과, 1:1 슬러그 비율의 전형적인 비혼합 WAG 공법보다 높은 오일 회수율과 CO2 주입효율이 나타났다.

키워드

WAG 공법

혼합 공정

비혼합 공정

MMP

회수율

References

이영수, 박용찬, 권순일, 성원모, 2008, “국내 대륙붕 고래 V 구조 대염수층에의 CO2 저장타당성 분석 연구,” 한국지구시스템공학회지, 제43권 4호, p. 381.
이원석, 허대기, 성원모, 김현태, 1996, “비정상유동법에 의한 상대투과율 측정,” 한국자원공학회지, 제33권 6호, p. 417.
장영호, 김기홍, 성원모, 2010, “고래 V 구조내 대염수층에 노달분석을 통한 CO2 주입 최적 설계,” 한국지구시스템공학회지, 제47권 6호, pp. 862-863.
Bon, J., Sarma, H.K., and Theophilos, A.M., 2005, “An Investigation of Minimum Miscibility Pressure for CO2-Rich Gases with Pantanes-Plus Fraction,” SPE97536, presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, Kuala Lumpur, Malaysia, Dec. 5-8.
Christensen, J.R., Stenby, E.H., and Skauge, A., 1998, “Review of the WAG Field Experience,” SPE71203, presented at the SPE International Petroleum Conference and Exhibition , Villhermosa, Mexico, Mar. 3-5.
Craig, F.F., Jr., 1971, The Reservoir Engineering Aspects of Waterflooding, Society of Petroleum Engineers of AIME, Henry L. Doherty Series, Dallas, Texas, USA, pp. 12-44.
Danesh, A, 1998, “PVT and Phase Behaviour of Petroleum Reservoir Fluid,” Developments in Petroleum Science, Vol. 47, Elsevier Science B.V. pp. 260-265
Elsharkawy, A.M., Poettmann, F.H., and Christiansen, R.L., 1996, “Measuring CO2 Minimum Miscibility Pressures: Slim-tube or rising-bubble method?,” Energy & Fuels, Vol. 10, pp. 443-449.
Filoco, P.R., and Sharma, M.M., 1998, “Effect of Brine Salinity and Crude-Oil Properties on Oil Recovery and Residual Oil Saturations,” SPE65402, presented at the SPE Annual Technical Conference and Exhibition, New Orleans, LA, USA, Sept. 27-30.
Gheden, S., 2009, “Global Laboratory Experience of CO2-EOR Flooding,” SPE125581, Presented at the 2009 SPE/EAGE Reservoir Characterization and Simulation Conference, Abu Dhabi, UAE, Oct. 19-21.
Hao, Y., Wu, Z., Ju, B., Chen, Y. and Luo, X., 2004, “Laboratory Investigation of CO2 Flooding,” SPE88883, presented at the 28th Annual SPE International Technical Conference and Exhibition, Abuja, Nigeria, Aug. 2-4.
Hinderaker, L. et al., 1996, “RUTH - A Comprehensive Norwegian R&D Program on IOR,” SPE36844, Presented at the SPE European Petroleum Conference, Milan, Italy, Oct. 22-24.
Holm, L.W., 1986, “Miscibility and Miscible Displacement,” SPE15794, Journal of Petroleum Technology, Vol. 38, No. 8, pp. 817-818.
Kulkarni, M.M., 2003, Immiscible and Miscible Gas-Oil Displacements in Porous Media, MS Thesis, The Craft and Hawkins Department Of Petroleum Engineering, Louisiana State University, Baton Rouge, LA, USA.
Mangalsingh, D., and Jagai, T., 1996, “A Laboratory Investigation of Carbon Dioxide Immiscible Process,” SPE36134, Presented at the 4th Latin American/Caribbean Petroleum Engineering Conference, Port-of-Spain, Trinidad & Tobago, Apr. 23-26.

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 : 49
No :4
Pages :521-530

[1] 이영수, 박용찬, 권순일, 성원모, 2008, “국내 대륙붕 고래 V 구조 대염수층에의 CO2 저장타당성 분석 연구,” 한국지구시스템공학회지, 제43권 4호, p. 381.

[2] 이원석, 허대기, 성원모, 김현태, 1996, “비정상유동법에 의한 상대투과율 측정,” 한국자원공학회지, 제33권 6호, p. 417.

[3] 장영호, 김기홍, 성원모, 2010, “고래 V 구조내 대염수층에 노달분석을 통한 CO2 주입 최적 설계,” 한국지구시스템공학회지, 제47권 6호, pp. 862-863.

[4] Bon, J., Sarma, H.K., and Theophilos, A.M., 2005, “An Investigation of Minimum Miscibility Pressure for CO2-Rich Gases with Pantanes-Plus Fraction,” SPE97536, presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, Kuala Lumpur, Malaysia, Dec. 5-8.

[5] Christensen, J.R., Stenby, E.H., and Skauge, A., 1998, “Review of the WAG Field Experience,” SPE71203, presented at the SPE International Petroleum Conference and Exhibition , Villhermosa, Mexico, Mar. 3-5.

[6] Craig, F.F., Jr., 1971, The Reservoir Engineering Aspects of Waterflooding, Society of Petroleum Engineers of AIME, Henry L. Doherty Series, Dallas, Texas, USA, pp. 12-44.

[7] Danesh, A, 1998, “PVT and Phase Behaviour of Petroleum Reservoir Fluid,” Developments in Petroleum Science, Vol. 47, Elsevier Science B.V. pp. 260-265

[8] Elsharkawy, A.M., Poettmann, F.H., and Christiansen, R.L., 1996, “Measuring CO2 Minimum Miscibility Pressures: Slim-tube or rising-bubble method?,” Energy & Fuels, Vol. 10, pp. 443-449.

[9] Filoco, P.R., and Sharma, M.M., 1998, “Effect of Brine Salinity and Crude-Oil Properties on Oil Recovery and Residual Oil Saturations,” SPE65402, presented at the SPE Annual Technical Conference and Exhibition, New Orleans, LA, USA, Sept. 27-30.

[10] Gheden, S., 2009, “Global Laboratory Experience of CO2-EOR Flooding,” SPE125581, Presented at the 2009 SPE/EAGE Reservoir Characterization and Simulation Conference, Abu Dhabi, UAE, Oct. 19-21.

[11] Hao, Y., Wu, Z., Ju, B., Chen, Y. and Luo, X., 2004, “Laboratory Investigation of CO2 Flooding,” SPE88883, presented at the 28th Annual SPE International Technical Conference and Exhibition, Abuja, Nigeria, Aug. 2-4.

[12] Hinderaker, L. et al., 1996, “RUTH - A Comprehensive Norwegian R&D Program on IOR,” SPE36844, Presented at the SPE European Petroleum Conference, Milan, Italy, Oct. 22-24.

[13] Holm, L.W., 1986, “Miscibility and Miscible Displacement,” SPE15794, Journal of Petroleum Technology, Vol. 38, No. 8, pp. 817-818.

[14] Kulkarni, M.M., 2003, Immiscible and Miscible Gas-Oil Displacements in Porous Media, MS Thesis, The Craft and Hawkins Department Of Petroleum Engineering, Louisiana State University, Baton Rouge, LA, USA.

[15] Mangalsingh, D., and Jagai, T., 1996, “A Laboratory Investigation of Carbon Dioxide Immiscible Process,” SPE36134, Presented at the 4th Latin American/Caribbean Petroleum Engineering Conference, Port-of-Spain, Trinidad & Tobago, Apr. 23-26.

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

All Issue