海上稠油油藏多元热流体吞吐开采气窜规律研究
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摘要
多元热流体吞吐开采技术应用于渤海油田10余井次,油田开采程度大幅提升;但油藏存在大孔道,导致井间气窜现象日趋严重,油井的正常生产受到严重影响。针对此问题,以渤海A油田的油藏特点为基础,研究大孔道长度、大孔道渗透率倍数及大孔道位置对气窜规律的影响。研究表明:大孔道的长度及渗透率倍数与气窜程度、气窜时机呈正相关,大孔道与生产井的相对位置不同,其气窜规律也有所差异。
Multi-component thermal fluid( MCTF) huff & puff technology has been continuously used for the offshore heavy oil development in over 10 wells of Bohai oilfield,which greatly improves the oil recovery in this area.However,the inter-well gas channeling becomes serious with the existence of large pore path in the reservoir,strongly affecting the oil well normal production. Based on reservoir characteristics of oilfield A in Bohai,the influence of large pore path length,permeability multiple and location on gas channeling is studied respectively. Results show that large pore path length and permeability multiple are directly proportional to gas channeling severity and timing. While the different relative locations of large pore path to the production well result in difference in gas channeling law.
Multi-component thermal fluid( MCTF) huff & puff technology has been continuously used for the offshore heavy oil development in over 10 wells of Bohai oilfield,which greatly improves the oil recovery in this area.However,the inter-well gas channeling becomes serious with the existence of large pore path in the reservoir,strongly affecting the oil well normal production. Based on reservoir characteristics of oilfield A in Bohai,the influence of large pore path length,permeability multiple and location on gas channeling is studied respectively. Results show that large pore path length and permeability multiple are directly proportional to gas channeling severity and timing. While the different relative locations of large pore path to the production well result in difference in gas channeling law.
引文
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[2]蔺玉秋,薛宗占,秦艳玲,等.边底水非均质性稠油油藏蒸汽驱关键技术[J].特种油气藏,2007(1):62-65.
[3]李葵英,陈辉,杨东明,等.边底水稠油油藏开发规律研究[J].西南石油大学学报(自然科学版),2008(3):93-96.
[4]袁忠超,郑伟,田冀,等.渤海边水稠油油藏多元热流体吞吐影响因素分析[J].长江大学学报(自然科学版),2015,12(20):60-64.
[5]魏旭光.富气混相驱气窜界定方法及其在阿尔及利亚某油田的应用[J].油气地质与采收率,2012,19(1):75-78.
[6]刘小鸿,张风义,黄凯,等.南堡35-2海上稠油油田热采初探[J].油气藏评价与开发,2011,1(1/2):61-63.
[7]曹嫣镔,刘冬青,张仲平,等.胜利油田超稠油蒸汽驱汽窜控制技术[J].石油勘探与开发,2012,39(6):739-743.
[8]耿朝晖.北过蒸汽驱汽窜控制技术初探[J].中外能源,2012,17(7):49-52.
[9]吴海君,杜庆军,宫汝祥.大孔道水平井多元热流体井间窜流程度表征研究[J].断块油气田,2015,22(2):206-209.
[10]杨兵,李敬松,祁成祥,等.海上稠油油藏多元热流体吞吐开采技术优化研究[J].石油地质与工程,2012,26(1):54-56.