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引言 当垂直主应力为中间主应力状态时,水压致裂所产生的裂缝方位必然沿着最大主应力方向展布。因此,测定主裂缝的方位,对于确定最大主应力方向、研究区域应力场的形态都是十分重要的。测量压裂裂缝方位通常的方法是用可膨胀橡胶封隔印模器与井下电视,这两种方法的优点是明显的,但它们共同的缺点是只能观察到裂缝在孔壁面上的位置,而其延伸方向
INTRODUCTION When the vertical principal stress is in the middle principal stress state, the fracture orientation caused by hydraulic fracturing inevitably spread along the direction of the maximum principal stress. Therefore, to determine the orientation of the main fracture, it is very important to study the shape of the stress field in the study area to determine the direction of the maximum principal stress. The usual method of measuring the orientation of fracturing fractures is to seal the impressionors with the downhole television with an inflatable rubber. The advantages of these two methods are obvious, but their common drawback is that only the location of the fracture on the wall of the hole can be observed, And its extension direction