垂直断层附近水平井产能的计算
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摘要
有边水存在的垂直断层附近水平井产能的计算模型中,把油层的顶部、底部和断层作为封闭边界,把边水作为供给边界,利用镜像反映原理,把水平井在垂直平面上映射为三个无穷井排,再利用势函数的叠加原理得到平面上任意一点的势,从而得到水平井的产能。研究了断层距离、水平井长度和地层各向异性系数对水平井产能的影响,水平井离断层越近,产能越低,建议把水平井布置在断层和边水之间的中间位置。
In the calculating model of the horizontal well productivity near the vertical fault with the edge water,the top,bottom and faults of the oil reservoir are regarded as the closed boundaries,the edge water is considered as the supply boundary,using the mirror reflection principle,the imaging of the horizontal well in the vertical plane is mapped to three infinite well arrays,and then by means of the superposition principle of the potential function,the potential of any point on the plane is obtained,and furthermore the productivity of the horizontal well is achieved.The influences of the fault distance,horizontal well length and formation anisotropy coefficient on the horizontal well productivity were studied. The closer the horizontal well is to the fault,the lower the productivity will be,it is suggested that the horizontal well should be arranged in the middle position between the fault and the edge water.
In the calculating model of the horizontal well productivity near the vertical fault with the edge water,the top,bottom and faults of the oil reservoir are regarded as the closed boundaries,the edge water is considered as the supply boundary,using the mirror reflection principle,the imaging of the horizontal well in the vertical plane is mapped to three infinite well arrays,and then by means of the superposition principle of the potential function,the potential of any point on the plane is obtained,and furthermore the productivity of the horizontal well is achieved.The influences of the fault distance,horizontal well length and formation anisotropy coefficient on the horizontal well productivity were studied. The closer the horizontal well is to the fault,the lower the productivity will be,it is suggested that the horizontal well should be arranged in the middle position between the fault and the edge water.
引文
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[2]司大志.底水油藏水平井开发优化设计[J].油气地质与采收率,2010,17(1):93-95.SI Dazhi. Optimization of development by horizontal wells in bottom water reservoirs[J]. Petroleum Geology and Recovery Efficiency,2010,17(1):93-95.
[3]范子菲,林志芳.边水驱油藏水平井产能公式研究[J].大庆石油地质与开发,1994,13(2):33-37.FAN Zifei,LIN Zhifang. Productivity formula of horizontal well in reservoirs with edge-water drive[J]. Petroleum Geology&Oilfield Development in Daqing,1994,13(2):33-37.
[4]马帅,王雯娟,张风波.断块油田断层附近水平井产能[J].大庆石油地质与开发,2016,35(6):68-72.MA Shuai,WANG Wenjuan,ZHANG Fengbo. Productivity of the horizontal well near the faults of the fault block oilfield[J]. Petroleum Geology&Oilfield Development in Daqing, 2016, 35(6):68-72.
[5]胥小伟,刘月田.复杂断块油藏水平井开发与封闭断层关系[J].断块油气田,2010,17(2):194-197.XUN Xiaowei,LIU Yuetian. Relationship between horizontal well development and sealed fault for complex fault-block reservoir[J]. Fault Block Oil and Gas Field,2010,17(2):194-197.
[6]叶双江,姜汉桥,孙传宗,等.断块油藏水平井产能研究及断层封堵影响分析[J].西南石油大学学报(自然科学版),2011,33(5):131-135.YE Shuangjiang,JIANG Haqiao,SUN Chuanzhong,et al. Productivity evaluation for horizontal well and analysis of fault sealing impacts in faulted block reservoirs[J]. Journal of Southwest Petroleum University(Science&Technology Edition),2011,33(5):131-135.
[7]JOSHI S D. Augmentation of well productivity using slant and horizontal wells[R]. SPE 15375,1986.
[8]孟琦,黄炳光,王怒涛,等.考虑摩阻的水平井产能[J].油气井测试,2014,23(5):12-15.MENG Qi,HUANG Bingguang,WANG Nutao,et al. Horizontal well productivity considering frictional resistance[J]. Well Testing,2014,23(5):12-15.