压裂水平井产能影响因素的实验研究  

EXPERIMENTAL STUDY ON THE FACTORS AFFECTING THE PRODUCTIVITY OF FRACTURED HORIZONTAL WELL

作　　者：高海红[1] 曲占庆[2] 赵梅[3] 

机构地区：[1]中国石化国际石油勘探开发有限公司,北京100083 [2]中国石油大学石油工程学院,山东东营257061 [3]中国石化胜利油田有限公司地质研究院,山东东营257061

出　　处：《西南石油大学学报（自然科学版）》2008年第4期73-76,共4页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金项目"水平井压裂改造及砾石充填防砂技术研究"(50274055)

摘　　要：压裂缝改变了水平井周围的渗流场,是影响压裂水平井产能的主要因素,压裂前需研究裂缝参数对压裂水平井产能的影响趋势。利用电模拟实验研究了水平井筒与压裂缝成不同夹角的压裂水平井的等压线分布特点及压裂缝各参数对压裂水平井产能的影响。结果表明:夹角改变了压裂水平井等压线的形状,等压线因夹角而发生了扭转,随夹角增大相同压力的等压线所控制的泄流面积增加,且产能随夹角α的增大而增大,与sinα成明显的线性关系;在具体的油藏地质条件下,存在裂缝夹角、裂缝数、裂缝长度、水平井筒长度及裂缝间距的最优匹配关系。电模拟实验结果为压裂水平井的施工设计和其产能预测提供了理论依据。Fractures change the flow field near the well bore,and are the important factors affecting the performance of fractured horizontal wells.In order to successfully fracture horizontal wells,it is noted to study the relations between the fracturing parameters and the performances.The pressure distribution characters of fracturing horizontal wells are studied,in which,there are different inclinations between the fractures and the boreholes.Conclusions are drawn as following,firstly,the inclinations between the fractures and the boreholes change the shape of the pressure contour near the well bore,and the contour twists along the inclinations.The contour controls the bigger drainage area with the increasing angle,accordingly the productivity increases with the increasing angle α,and lines with the angle sinα.Secondly,there exits the optimal match including the inclinations,the fracture numbers,the fracture length,the horizontal section length and the fracture space.So the results are instructive for designing fracturing horizontal wells and forecasting productivity.

关 键 词：压裂水平井 电模拟 裂缝 等压线 增产系数 

分 类 号：TE355.6[石油与天然气工程—油气田开发工程]