【摘要】 在压裂过程中,利用地层岩石破裂产生的微地震波对松辽盆地头台油田10口水力压裂井的人工裂缝及天然裂缝方位、几何形态进行测试,确定了该油田地应力特征。分析结果表明,头台油田人工裂缝形成水平最大主应力方向为100°~120,°平均为110°;天然裂缝方向70%为0°~50,°地层中三向应力为南部较小、北部较大,构造断裂与天然裂缝的走向近似平行。更多还原

【Abstract】 In the process of fracturing,fracture azimuths and geometries of artificial and natural fractures of 10 hydraulic fractured wells of Toutai Oil Field in Songliao basin are tested by microseismic wave from formation rock bursts,to confirm its characteristics of ground stress field.It is indicated from analysis results that,the maximum azimuth of horizontal principal stress of artificial fractures of Toutai Oil Field is 100°~120°,average 110°;70% of natural fracture azimuths range from 0°~50°.Triaxial stress of formation is lower in the south and higher in the north and the strike of structural faults parallels with natural fractures.更多还原