超低渗透油藏CO_2驱注入参数优化的实验研究
|
摘要
CO_2驱是提高超低渗油藏采收率的有效方法之一,然而,目前对CO_2在超低渗油藏中的驱油机理认识还不完善。针对西部某超低渗透油藏开发过程中注水矛盾问题,通过物理模拟实验,研究了CO_2驱对该超低渗透油藏的适应性,并通过对比不同的CO_2注入方式和注入参数对驱油效率的影响规律,优选出超低渗透油藏CO_2驱最佳注入参数。实验结果表明:对该超低渗透裂缝性油藏,周期注气方式下驱油效果最佳,且当注入段塞为0.06 PV,注气与焖井时间比为1∶2时延缓气窜的效果最好,驱油效率达到60%以上。研究结果为该类型超低渗油藏现场注气开发设计提供指导作用。
CO_2 flooding is one of the effective methods to enhance recovery in ultra-low permeability reservoir.However,the current understanding of the mechanism of CO_2 flooding in ultra-low permeability reservoirs is not clear. For the contradictions of water injection during development process in a western ultra-low permeability reservoir,study the adaptability of CO_2 flooding in the reservoir through physical simulation experiment and optimize the injection method and injection parameter for the low permeability reservoir by comparing the different injection methods and injection parameters impact on oil displacement efficiency. The results of research shows,for the ultralow permeability fractured reservoirs,cyclic gas injection is best,and when injected slug is 0. 06 PV,gas injection and soak time ratio is 1∶ 2 can effectively delay the gas channeling and improve the overall effect of flooding. The research results provide guidance for gas injection in low permeability reservoir field development.
CO_2 flooding is one of the effective methods to enhance recovery in ultra-low permeability reservoir.However,the current understanding of the mechanism of CO_2 flooding in ultra-low permeability reservoirs is not clear. For the contradictions of water injection during development process in a western ultra-low permeability reservoir,study the adaptability of CO_2 flooding in the reservoir through physical simulation experiment and optimize the injection method and injection parameter for the low permeability reservoir by comparing the different injection methods and injection parameters impact on oil displacement efficiency. The results of research shows,for the ultralow permeability fractured reservoirs,cyclic gas injection is best,and when injected slug is 0. 06 PV,gas injection and soak time ratio is 1∶ 2 can effectively delay the gas channeling and improve the overall effect of flooding. The research results provide guidance for gas injection in low permeability reservoir field development.
引文
1王瑞飞,陈明强,孙卫.特低渗透砂岩储层微观孔隙结构分类评价.地球学报,2008;29(2):213-220Wang Ruifei,Chen Mingqiang,Sun Wei.Classification and evaluation of micro-pore structures in the ultra-low permeability sandstone reservoir.Acta Geoscientica Sinica,2008;29(2):213-220
2高云丛,赵密福,王建波,等.特低渗油藏CO2非混相驱生产特征与气窜规律.石油勘探与开发,2014;41(1):79-85Gao Yuncong,Zhao Mifu,Wang Jianbo,et al.Performance and gas breakthrough during CO2immiscible flooding in ultra-low permeability reservoirs.Petroleum Exploration and Development,2014;41(1):79-85
3郝永卯,薄启炜,陈月明.CO2驱油实验研究.石油勘探与开发,2005;32(2):110-112Hao Yongmao,Bo Qiwei,Chen Yueming.Laboratory investigation of CO2flooding.Petroleum Exploration and Development,2005;32(2):110-112
4 Bangia V K,Yau F F,Hendricks G R.Reservoir performance of a gravity stable,vertical CO2miscible flood:Wolfcamp reservoir wellman unit.SPE Reservoir Engineering,1993;8(4):261-269
5 Bellavance J F R.Dollarhide devonian CO2flood:project performance review 10 years later.SPE Permian Basin Oil&Gas Recovery Conference.Richardson:SPE,1996:SPE 35190
6康浩,高建,宋新民,等.低渗透CO2驱含油饱和度变化特征研究.科学技术与工程,2014;14(14):198-201Kang Hao,Gao Jian,Song Xinmin,et al.Study on oil saturation distribution of CO2drive in low permeability reservoir.Science Technology and Engineering,2014;14(14):198-201
7 Folger L K,Guillot S N A.Case Study of the Development of the Sundown Slaugher Unit CO2Flood Hockley County.SPE Permian Basin Oil&Gas Recovery Conference.Richardson:SPE,1996:SPE 35189
8 Sorbie K S,Dijke M I J.The mechanism of oil recovery by water-alternating-gas injection at near miscible conditions in mixed wet systems.SPE Improved Oil Recovery Symposium.Richardson:SPE,2010:SPE 129837
9 Feng Qingxian,Di Liancheng,et al.A visual micro-model study:The mechanism of water-alter-gas displacement in pours media.SPE/DOE Fourteenth Symposium on Improved Oil Recovery.Richardson:SPE,2004:SPE 89362
10 Gorell S B.Implications of water-alternate-gas injection for profile control and injectivity.SPE/DOE Seventh Symposium on Improved Oil Recovery.Richardson:SPE,1990:SPE 20210
11 Bedrikovetsky P.Optimization of tertiary water-alter-CO2injection.Fourth Latin American and Caribbean Petroleum Engineering Conference.Richardson:SPE,1996:SPE 36133
12李莉,庞彦明,雷友忠,等.特低渗透油藏合理注气能力和开发效果分析.天然气工业,2006;26(9):118-121Li Li,Pang Yanming,Lei Youzhong,et al.The appropriate capacity and development effect of gas injection in extremely low permeability reservoirs.Natural Gas Industry,2006;26(9):118-121
13何应付,周锡生,李敏,等.特低渗透油藏注CO2驱油注入方式研究.石油天然气学报,2010;32(6):131-134He Yingfu,Zhou Xisheng,Li Min,et al.Injection mode of CO2displacement in extra-low permeability reservoirs.Journal of Oil and Gas Technology,2010;32(6):131-134
14 Miller B J.Design and results of a shallow,light oilfield-wide application of CO2huff and puff process.SPE/DOE Enhanced Oil Recovery Symposium.Richardson:SPE,1990:SPE 20268
15 Pu H,Li Y H.CO2EOR mechanisms in Bakken shale oil reservoirs.Carbon Management Technology Conference.Houston:AICHE,2015:CMTC 439769
16 Malcolm D M,Scott M F,Akanni S L.New approach to CO2flood:soak alternating gas.SPE Permian Basin Oil and Gas Recovery Conference.Richardson:SPE,2001:SPE 70023
2高云丛,赵密福,王建波,等.特低渗油藏CO2非混相驱生产特征与气窜规律.石油勘探与开发,2014;41(1):79-85Gao Yuncong,Zhao Mifu,Wang Jianbo,et al.Performance and gas breakthrough during CO2immiscible flooding in ultra-low permeability reservoirs.Petroleum Exploration and Development,2014;41(1):79-85
3郝永卯,薄启炜,陈月明.CO2驱油实验研究.石油勘探与开发,2005;32(2):110-112Hao Yongmao,Bo Qiwei,Chen Yueming.Laboratory investigation of CO2flooding.Petroleum Exploration and Development,2005;32(2):110-112
4 Bangia V K,Yau F F,Hendricks G R.Reservoir performance of a gravity stable,vertical CO2miscible flood:Wolfcamp reservoir wellman unit.SPE Reservoir Engineering,1993;8(4):261-269
5 Bellavance J F R.Dollarhide devonian CO2flood:project performance review 10 years later.SPE Permian Basin Oil&Gas Recovery Conference.Richardson:SPE,1996:SPE 35190
6康浩,高建,宋新民,等.低渗透CO2驱含油饱和度变化特征研究.科学技术与工程,2014;14(14):198-201Kang Hao,Gao Jian,Song Xinmin,et al.Study on oil saturation distribution of CO2drive in low permeability reservoir.Science Technology and Engineering,2014;14(14):198-201
7 Folger L K,Guillot S N A.Case Study of the Development of the Sundown Slaugher Unit CO2Flood Hockley County.SPE Permian Basin Oil&Gas Recovery Conference.Richardson:SPE,1996:SPE 35189
8 Sorbie K S,Dijke M I J.The mechanism of oil recovery by water-alternating-gas injection at near miscible conditions in mixed wet systems.SPE Improved Oil Recovery Symposium.Richardson:SPE,2010:SPE 129837
9 Feng Qingxian,Di Liancheng,et al.A visual micro-model study:The mechanism of water-alter-gas displacement in pours media.SPE/DOE Fourteenth Symposium on Improved Oil Recovery.Richardson:SPE,2004:SPE 89362
10 Gorell S B.Implications of water-alternate-gas injection for profile control and injectivity.SPE/DOE Seventh Symposium on Improved Oil Recovery.Richardson:SPE,1990:SPE 20210
11 Bedrikovetsky P.Optimization of tertiary water-alter-CO2injection.Fourth Latin American and Caribbean Petroleum Engineering Conference.Richardson:SPE,1996:SPE 36133
12李莉,庞彦明,雷友忠,等.特低渗透油藏合理注气能力和开发效果分析.天然气工业,2006;26(9):118-121Li Li,Pang Yanming,Lei Youzhong,et al.The appropriate capacity and development effect of gas injection in extremely low permeability reservoirs.Natural Gas Industry,2006;26(9):118-121
13何应付,周锡生,李敏,等.特低渗透油藏注CO2驱油注入方式研究.石油天然气学报,2010;32(6):131-134He Yingfu,Zhou Xisheng,Li Min,et al.Injection mode of CO2displacement in extra-low permeability reservoirs.Journal of Oil and Gas Technology,2010;32(6):131-134
14 Miller B J.Design and results of a shallow,light oilfield-wide application of CO2huff and puff process.SPE/DOE Enhanced Oil Recovery Symposium.Richardson:SPE,1990:SPE 20268
15 Pu H,Li Y H.CO2EOR mechanisms in Bakken shale oil reservoirs.Carbon Management Technology Conference.Houston:AICHE,2015:CMTC 439769
16 Malcolm D M,Scott M F,Akanni S L.New approach to CO2flood:soak alternating gas.SPE Permian Basin Oil and Gas Recovery Conference.Richardson:SPE,2001:SPE 70023