Optimization of Steam Injection Pressure in SAGD Using Artificial Neural Network

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2009 Vol.46, Issue 2 Preview Page Next Page

Optimization of Steam Injection Pressure in SAGD Using Artificial Neural Network 인공신경망을 이용한 SAGD 증기주입압력 최적화: 감동재, 민배현, 정성훈, 박창협, 강주명, 김지영, 장일식, 최영락
Dongjae Kam, Baehyun Min, Sunghoon Chung, Changhyup Park, Joe M. Kang, Jiyoung Kim, Ilsik Jang and Youngrak Choi

30 April 2009. pp. 143-150

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Abstract

SAGD has been widely used to extract oil from heavy oil and bitumen reservoir as in-situ recoverable technology. Effective steam injection was important because SAGD depended on the combustion of natural gas to generate steam of which cost was dominant. Numerical approach based on ANN (Artificial Neural Network) scheme was developed to obtain an optimized schedule of variable injection pressure in SAGD. ANN model predicts cSOR in SAGD while it does a production benefit in ES-SAGD. The model was verified by showing accurate prediction error, less than 5.5% compared with typical reservoir simulator. Optimized schedule decreased 26% of cSOR in SAGD while improved an economical value up to 34% in ES-SAGD rather than that of conventional approach, constant pressure scheduling.

Keywords

SAGD

Artificial Neural Network

Steam injection pressure

Variable-pressure method

SAGD공법(증기배유공법)은 중유나 비튜멘의 생산에 효과적이지만 증기 생성을 위해 다량의 담수와 천연가스를 사용하는 한계를 가지고 있다. 천연가스 사용이 생산 비용의 큰 부분을 차지하므로 적절한 압력의 증기주입은 SAGD공법의 경제성에 매우 중요하다. 이 연구에서는 SAGD공법의 에너지 효율을 향상시키고 다수의 증기 주입압력 시나리오의 신속한 평가를 위하여 인공신경망을 이용한 증기주입압력 최적화 모델을 개발하였다. 개발한 인공신경망 모델로 SAGD공법의 생산기간별 증기주입압력에 따른 누적 증기-오일비와 ES-SAGD공법의 생산이윤을 예측하였다. 개발한 모델을 대상 저류층에 적용한 결과, 저류층 시뮬레이션 결과와 개발 모델의 예측값이 상관계수 0.9 이상, 예측 오차 5.5% 이하로 인공신경망 모델의 예측 성능을 확인하였다. 생산기간동안 증기주입압력을 조절한 SAGD공법의 최적 시나리오는 일정 압력으로 증기를 주입하는 기존의 경우에 비해 26% 낮아진 누적 증기-오일비를 나타내었고, ES-SAGD도 34% 향상된 생산이윤을 얻었다.

키워드

증기배유공법

인공신경망

증기주입압력

변동압력법

References

Butler, R. M., Mcnab, G. S., and Lo, H. Y., 1981, “Theoretical studies of the Gravity Drainage of Heavy Oil During Steam Heating,” Can. J. Chem. Eng., Vol. 59, pp. 455-460.
Butler, R. M., 1997, Thermal Recovery of Oil and Bitumen, GravDrain Inc., Calgary, Canada.
Edmunds, N. and Chhina, H., 2000, “Economic Optimum Operating Pressure for SAGD Projects in Alberta,” JCPT, Vol. 40, No. 12, pp. 13-17.
Gates, I. D., Kenny, J., Hernandez-Hdez, I. L., and Bunio, G. L., 2005, “Steam-Injection Strategy and Energetics of Steam-Assisted Gravity Drainage,” SPE 97742, presented at SPE International Thermal Operations and Heavy Oil Symposium, Calgary, Canada, November 1-3.
Gates, I. D. and Chakrabarty, N., 2006, “Optimization of Steam-Assisted Gravity Drainage in McMurray Reservoir,” JCPT, Vol. 45, No. 9, pp. 54-62.
Nasr, T. N., Beaulieu, G., Golbeck, H., and Heck, G., 2003, “Novel Expanding Solvent-SAGD Process ES-SAGD,” JCPT, Vol. 42, No. 1, pp. 13-16.
Shin, H., and Polikar, M., 2005, “Optimizing the SAGD Process in Three Major Canadian Oil-Sands Areas,” SPE 95754, presented at SPE Annual Technical Conference and Exhibition, Dallas, Texas, U.S.A, October 9-12.
Singhal, A. K., Ito, Y., and Kasraie, M, 1998, “Screening and Design Criteria for Steam-Assisted Gravity Drainage Projects,” SPE 50410, presented at SPE International Conference on Horizontal Well Technology, Calgary, Canada, November 1-4.

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 : 46
No :2
Pages :143-150

[1] Butler, R. M., Mcnab, G. S., and Lo, H. Y., 1981, “Theoretical studies of the Gravity Drainage of Heavy Oil During Steam Heating,” Can. J. Chem. Eng., Vol. 59, pp. 455-460.

[2] Butler, R. M., 1997, Thermal Recovery of Oil and Bitumen, GravDrain Inc., Calgary, Canada.

[3] Edmunds, N. and Chhina, H., 2000, “Economic Optimum Operating Pressure for SAGD Projects in Alberta,” JCPT, Vol. 40, No. 12, pp. 13-17.

[4] Gates, I. D., Kenny, J., Hernandez-Hdez, I. L., and Bunio, G. L., 2005, “Steam-Injection Strategy and Energetics of Steam-Assisted Gravity Drainage,” SPE 97742, presented at SPE International Thermal Operations and Heavy Oil Symposium, Calgary, Canada, November 1-3.

[5] Gates, I. D. and Chakrabarty, N., 2006, “Optimization of Steam-Assisted Gravity Drainage in McMurray Reservoir,” JCPT, Vol. 45, No. 9, pp. 54-62.

[6] Nasr, T. N., Beaulieu, G., Golbeck, H., and Heck, G., 2003, “Novel Expanding Solvent-SAGD Process ES-SAGD,” JCPT, Vol. 42, No. 1, pp. 13-16.

[7] Shin, H., and Polikar, M., 2005, “Optimizing the SAGD Process in Three Major Canadian Oil-Sands Areas,” SPE 95754, presented at SPE Annual Technical Conference and Exhibition, Dallas, Texas, U.S.A, October 9-12.

[8] Singhal, A. K., Ito, Y., and Kasraie, M, 1998, “Screening and Design Criteria for Steam-Assisted Gravity Drainage Projects,” SPE 50410, presented at SPE International Conference on Horizontal Well Technology, Calgary, Canada, November 1-4.

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

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