浅层稠油油藏CO_2吞吐控水增油机理研究
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摘要
针对低稠油油藏和稠油油藏注水开发中后期含水上升快、原油采收率的低等问题,开展了CO2吞吐控水增油的室内物理模拟实验和单井CO2吞吐控水增油的数值模拟。为了研究CO2吞吐控水增油的机理及可行性,在室内分别开展了CO2与地层原油/地层水配伍性实验和CO2吞吐控水增油长岩芯实验。CO2与地层原油/地层水配伍性实验结果表明:CO2对原油有增容膨胀和降黏作用;一定温度下,随着压力的降低,饱和CO2的地层水的体积膨胀,CO2在地层水中的溶解度降低,CO2吞吐过程中,地层水遇到狭小孔隙受阻,产生贾敏效应,控制水的产出。长岩芯实验也表明,CO2吞吐有明显的控水增油的作用。单井CO2吞吐控水增油的数值模拟结果同样证实了CO2吞吐具有良好的控水增油显著。
To solve the problems of rapidly increase water cut and low oil recovery in the later water-flooding of low heavy oil and heavy oil reservoirs,we conducted laboratory physical simulation experiments and single well numerical simulation of CO2 huff and puff in water control and oil enhancement. To find out the mechanism and feasibility,CO2 and reservoir oil/water compatibility experiment and long core experiment of CO2 huff and puff are carried out respectively. The former has shown that CO2 has capacity expansion and viscosity reduction effects on the heavy oil. At a certain temperature,as the pressure decreases,the volume of reservoir water saturated with CO2 expands and the solubility of CO2 in reservoir water declines which indicates that in CO2 huff and puff,water is trapped by the small core thus causing Jamine Effect,and preventing the water from being produced. The long core experiment has also shown that CO2 huff and puff has a significant effect on controlling the water and enhancing the oil recovery. This has also been demonstrated by single well numerical simulation of CO2 huff and puff.
To solve the problems of rapidly increase water cut and low oil recovery in the later water-flooding of low heavy oil and heavy oil reservoirs,we conducted laboratory physical simulation experiments and single well numerical simulation of CO2 huff and puff in water control and oil enhancement. To find out the mechanism and feasibility,CO2 and reservoir oil/water compatibility experiment and long core experiment of CO2 huff and puff are carried out respectively. The former has shown that CO2 has capacity expansion and viscosity reduction effects on the heavy oil. At a certain temperature,as the pressure decreases,the volume of reservoir water saturated with CO2 expands and the solubility of CO2 in reservoir water declines which indicates that in CO2 huff and puff,water is trapped by the small core thus causing Jamine Effect,and preventing the water from being produced. The long core experiment has also shown that CO2 huff and puff has a significant effect on controlling the water and enhancing the oil recovery. This has also been demonstrated by single well numerical simulation of CO2 huff and puff.
引文
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[2]郭莉,王延斌,刘伟新,等.大港油田注水开发过程中油藏参数变化规律分析[J].石油实验地质,2006,28(1):85–89.
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[9]杨志,侯攀,马吉祥,等.水平井均衡流入控水技术[J].特种油气藏,2012,19(1):116–118.Yang Zhi,Hou Pan,Ma Jixiang,et al.Uniform inflow and water control technology for horizontal wells[J].Special Oil&Gas Reservoirs,2012,19(1):116–118.
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[14]刘建新,张营华,任韶然,等.新型相对渗透率改善剂控水性能试验研究[J].石油天然气学报,2008,30(5):140–142.
[15]李士伦,潘毅,孙雷.提高凝析气藏采收率的新思路[J].天然气工业,2008,28(9):1–5.Li Shilun,Pan Yi,Sun Lei.An new idea on enhancing the recovery rate of condensate gas reservoirs[J].Natural Gas Industry,2008,28(9):1–5.
[16]宫汝祥,李翔,李效波,等.海上油田氮气泡沫稳油控水注采参数数值模拟[J].科技导报,2011,29(33):58–61.
[17]王继刚,刘庆旺,段勇.新型控水窜泡沫剂的室内研制与评价[J].钻井液与完井液,2007,24(5):53–55.
[18]杨红斌,吴飞鹏,李淼,等.低渗透油藏自适应弱凝胶辅助氮气泡沫复合调驱体系[J].东北石油大学学报,2013,37(5):78–84.Yang Hongbin,Wu Feipeng,Li Miao,et al.Composite profile control of self–adaption weak assisted nitrogen foam in low permeability reservior[J].Journal of Northeast Petroleum University,2013,37(5):78–84.
[19]邓兴梁,郭平,蒋光迹.裂缝–孔洞型凝析气藏不同开发方式的长岩心实验[J].天然气工业,2011,31(6):60–62.Deng Xingliang,Guo Ping,Jiang Guangji.A long–core experimental study of different development schemes on fractured cavernous gas condensate reservoirs[J].Natural Gas Industry,2011,31(6):60–62..
[20]鹿腾,李兆敏,刘伟,等.强水敏稠油油藏CO2吞吐技术研究[J].西南石油大学学报:自然科学版,2013,35(1):122–126.Lu Teng,Li Zhaomin,Liu Wei,et al.Study on CO2huff and puff technology for strong water sensitive heavy oil reservoir[J].Journal of Southwest Petroleum University:Science&Technology Edition,2013,35(1):122–126.
[21]李国永,叶盛军,冯建松,等.复杂断块油藏水平井二氧化碳吞吐控水增油技术及其应用[J].油气地质与采收率,2012,19(4):62–65.Li Guoyong,Ye Shengjun,Feng Jiansong,et al.Research and application of water–control and oil–enhance for horizontal wells CO2huff and puff in complex fault–block reservoir[J].Petroleum Geology and Recovery Efficiency,2012,19(4):62–65.
[22]Asghari K,Torabi F.Laboratory experimental results of huff–and–puff CO2flooding in a fractured core system[C].SPE 110577,2007.
[23]Farshidand T,Koorosh A.Effect of connate water saturation,oil viscosity and matrix permeability on rate of gravity drainage during immiscible and miscible displacement tests in matrix–fracture experimental model[C].SPE141295,2010.
[2]郭莉,王延斌,刘伟新,等.大港油田注水开发过程中油藏参数变化规律分析[J].石油实验地质,2006,28(1):85–89.
[3]张本艳,张继超,涂文利.胜利油田注水现状及对储集层的影响[J].石油勘探与开发,2007,34(3):364–368.
[4]王小琳,武平仓,韩亚萍,等.西峰油田长8层注水现状及投注措施效果[J].石油勘探与开发,2008,35(3):344–348.Wang Xiaolin,Wu Pingcang,Han Yaping.et al.Current situation and measures of water injection in Chang 8 Layer,Xifeng Oilfield,Changqing[J].Petroleum Exploration and Development,2008,35(3):344–348.
[5]李兆敏,张东,刘崴挂,等.冻胶泡沫体系选择性控水技术研究与应用[J].特种油气藏,2012,19(4):1–6.Li Zhaomin,Zhang Dong,Liu Weigua,et al.Study and application of foamed gel system for selective water control[J].Special Oil&Gas Reservoirs,2012,19(4):1–6.
[6]李良川,肖国华,王金忠,等.冀东油田水平井分段控水配套技术[J].断块油气田,2010,17(6):655–658.Li Liangchuan,Xiao Guohua,Wang Jinzhong,et al.Sectionalized water control matching technology of horizontal well in Jidong Oilfield[J].Fault–Block Oil&Gas Field,2010,17(6):655–658.
[7]强晓光,姜增所,宋颖智.调流控水筛管在冀东油田水平井的应用研究[J].石油矿场机械,2011,40(4):77–79.Qiang Xiaoguang,Jiang Zengsuo,Song Yingzhi.Research and application of water control screenpipe in Jidong Oilfield horizontal well[J].Oil Field Equipment,2011,40(4):77–79.
[8]赵旭,姚志良,刘欢乐.水平井调流控水筛管完井设计方法研究[J].石油钻采工艺,2013,35(1):23–27.Zhao Xu,Yao Zhiliang,Liu Huanle.Technical research on well completion design with Inflow Control Device(ICD)in horizontal wells[J].Oil Drilling&Production Technology,2013,35(1):23–27.
[9]杨志,侯攀,马吉祥,等.水平井均衡流入控水技术[J].特种油气藏,2012,19(1):116–118.Yang Zhi,Hou Pan,Ma Jixiang,et al.Uniform inflow and water control technology for horizontal wells[J].Special Oil&Gas Reservoirs,2012,19(1):116–118.
[10]王金忠,肖国华,陈雷,等.水平井管内分段调流控水技术研究与应用[J].石油机械,2011,39(1):60–61,84.Wang Jinzhong,Xiao Guohua,Chen Lei,et al.Research and application of the staged flow–regulating and water–control technology with screen or tubing in horizontal holes[J].China Petroleum Machinery,2011,39(1):60–61,84.
[11]饶富培,董云龙,吴杰生,等.大港油田底水油藏水平井控水完井工艺[J].石油钻采工艺,2010,32(3):107–109.Rao Fupei,Dong Yunlong,Wu Jiesheng,et al.Technology of water control and well completion of horizontal wells in bottom water reservoir in Dagang Oilfield[J].Oil Drilling&Production Technology,2010,32(3):107–109.
[12]宋金波,郑铎,梅明霞,等.超疏水复合控水砂表面结构及疏水性能研究[J].油田化学,2011,28(4):402–405.Song Jinbo,Zheng Duo,Mei Ming Xia,et al.Study on the surface structure and hydrophobicity of superhydrophobic composite water control sand[J].Oilfield Chemistry,2011,28(4):402–405.
[13]任闽燕,宋金波,郑铎,等.复合控水砂表面结构及疏水性能研究[J].石油钻采工艺,2012,34(1):103–106.Ren Minyan,Song Jinbo,Zheng Duo,et al.Study on surface structure and hydrophobicity of super–hydrophobic composite water control sand[J].Oil Drilling&Production Technology,2012,34(1):103–106.
[14]刘建新,张营华,任韶然,等.新型相对渗透率改善剂控水性能试验研究[J].石油天然气学报,2008,30(5):140–142.
[15]李士伦,潘毅,孙雷.提高凝析气藏采收率的新思路[J].天然气工业,2008,28(9):1–5.Li Shilun,Pan Yi,Sun Lei.An new idea on enhancing the recovery rate of condensate gas reservoirs[J].Natural Gas Industry,2008,28(9):1–5.
[16]宫汝祥,李翔,李效波,等.海上油田氮气泡沫稳油控水注采参数数值模拟[J].科技导报,2011,29(33):58–61.
[17]王继刚,刘庆旺,段勇.新型控水窜泡沫剂的室内研制与评价[J].钻井液与完井液,2007,24(5):53–55.
[18]杨红斌,吴飞鹏,李淼,等.低渗透油藏自适应弱凝胶辅助氮气泡沫复合调驱体系[J].东北石油大学学报,2013,37(5):78–84.Yang Hongbin,Wu Feipeng,Li Miao,et al.Composite profile control of self–adaption weak assisted nitrogen foam in low permeability reservior[J].Journal of Northeast Petroleum University,2013,37(5):78–84.
[19]邓兴梁,郭平,蒋光迹.裂缝–孔洞型凝析气藏不同开发方式的长岩心实验[J].天然气工业,2011,31(6):60–62.Deng Xingliang,Guo Ping,Jiang Guangji.A long–core experimental study of different development schemes on fractured cavernous gas condensate reservoirs[J].Natural Gas Industry,2011,31(6):60–62..
[20]鹿腾,李兆敏,刘伟,等.强水敏稠油油藏CO2吞吐技术研究[J].西南石油大学学报:自然科学版,2013,35(1):122–126.Lu Teng,Li Zhaomin,Liu Wei,et al.Study on CO2huff and puff technology for strong water sensitive heavy oil reservoir[J].Journal of Southwest Petroleum University:Science&Technology Edition,2013,35(1):122–126.
[21]李国永,叶盛军,冯建松,等.复杂断块油藏水平井二氧化碳吞吐控水增油技术及其应用[J].油气地质与采收率,2012,19(4):62–65.Li Guoyong,Ye Shengjun,Feng Jiansong,et al.Research and application of water–control and oil–enhance for horizontal wells CO2huff and puff in complex fault–block reservoir[J].Petroleum Geology and Recovery Efficiency,2012,19(4):62–65.
[22]Asghari K,Torabi F.Laboratory experimental results of huff–and–puff CO2flooding in a fractured core system[C].SPE 110577,2007.
[23]Farshidand T,Koorosh A.Effect of connate water saturation,oil viscosity and matrix permeability on rate of gravity drainage during immiscible and miscible displacement tests in matrix–fracture experimental model[C].SPE141295,2010.