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根据成像测井和偶极声波测井资料,研究了车镇凹陷的地应力。研究表明,电成像图解释的钻井诱导缝走向与最大水平主应力方向一致,井壁崩落方向和崩落椭圆井眼长轴方位指示最小水平主应力方向,偶极声波横波各向异性成像图的快横波方位指示最大水平主应力方向。根据5口井成像测井和偶极声波测井解释成果,编制了钻井诱导缝、井壁崩落和快横波方位指示的最大水平主应力方位频率图,其优势方位表明,车66井区现今最大水平主应力方向为北西西-南东东向,与井区周围盆倾断层走向基本一致,反映了地应力场的继承性。
According to imaging and dipole sonic logging data, the geostress of Chezhen depression is studied. The results show that the direction of drilling induced fracture is consistent with the direction of the maximum horizontal principal stress explained by electrical imaging. The direction of the cave wall cavern and the long axis of the caving oval borehole indicate the direction of the minimum horizontal principal stress and the dipole acoustic shear wave anisotropy The direction of shear wave indicates the direction of the maximum horizontal principal stress. According to the imaging interpretation results of 5 wells and dipole sonic logging, the azimuth frequency maps of the maximum horizontal principal stress of drilling induced seams, borehole caverns and fast shear wave azimuths are compiled. The horizontal principal stress direction is north west-south-east-east direction, which basically coincides with the trend of basin-dip fault around the well area, which reflects the succession of the geostress field.