考虑裂缝与井筒不同夹角的水平井产能分析  

PRODUCTIVITY ANALYSIS OF THE FRACTURED HORIZONTAL WELL WITH A CERTAIN ANGLE TO THE WELLBORE

作　　者：李铁军[1] 柯西军[1] 郭大立[1] 唐志昊[1] 

机构地区：[1]西南石油大学理学院,四川成都610500

出　　处：《大庆石油地质与开发》2011年第6期122-126,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：四川省教育厅重点项目（10ZAl50）和西南石油大学自然科学基金（2010XJZ196）联合资助.

摘　　要：水平井压裂后形成的多条裂缝与水平井井筒夹角不尽相同，增加了压后水平井产能计算的复杂性，而水平井的产量预测分析是制定压裂方案的关键技术之一。从裂缝与井筒存在不同夹角的情形出发，结合数学理论和复位势理论、势能叠加原理等渗流理论，应用考虑裂缝干扰的产能计算模型，提出了一个好的数值计算方法。通过大量的实例计算和对比，分析了裂缝平面与水平井井筒不同夹角时的产能。结果表明：裂缝与水平井筒夹角越大，产量越高；裂缝与水平井井筒夹角的不同组合对产能影响较大；对于不同的裂缝布局，不同位置的裂缝应该尽量错开排列。研究结果对现场水平井压裂方案优化设计具有指导意义。For a fractured horizontal well, the different included angles between the many reduced fractures and the wellbores are not all the same, thus the complexity of the well~ productivity calculation becomes more serious, but the above calculation and analysis is one of the key techniques of setting up the fracturing program of the hori- zontal well. For the different included angles existed above, by integrating mathematic theory and the following fil- trating theories such as reset potential, potential energy stacking theory and so on, a good method of numerical cal- culation is proposed with the help of the productivity calculating method considering fracture disturbance. The re- suits show that the bigger the angle is, the higher the productivity is; the different assemblages of the angle have a great impact on the productivity; for the different fracture layouts, the different positions of the fractures should try best to arrange staggered. The studied results possess a certain guiding significance for the design optimization of practical horizontal well fracturing program.

关 键 词：压裂水平井 夹角 夹角组合 裂缝布局 产能分析 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程]