区域应力场的应力方向是人工裂缝方向的普遍控制因素，多数人工裂缝方向沿区域最大水平主应力方向。但构造、原生裂缝、介质间断面也会影响人工裂缝方向。在蒙古国塔木查格盆地及中国黑龙江省海拉尔盆地进行了大量的压裂裂缝监测，监测结果为油田布井提供了依据。监测发现，多数人工裂缝方向沿区域最大水平主应力方向，但也出现一些异常方向的人工裂缝，异常方向人工裂缝的井通常高产。了解异常人工裂缝的形成原因，对提高压裂施工水平，应用压裂裂缝方向布井有重要意义。结合监测结果，探讨了监测区异常方向人工裂缝的形成机制，及有些人工裂缝方向异

Stress orientations of regional stress field is the main influencing factors for the hydraulic fracture. Most of the hydraulic fracture extend along the greatest principal stress direction, which also affected by geological structure, original faults and faulting plane. Lots of hydraulic fracturing have been monitored in the Tamtsag Basin of Mongolia and Hailaer Basin in the Heilongjiang province of China, which provided information for the will distribution. It is proved that the rule of the greatest principal stress direction except some anomaly directions. It will be great helpful for us to study these anomaly cases. The following of this article will analysis the mechanism of the anomaly directions and reasons for high production.