摘要
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。
Taking Che-66 well area in Chezhen sag as an example, the horizontal direction of terrestrial stress is studied using electric imaging logs and dipole acoustic logs. The drilling-induced fractures given by the imaging logging interpretation are accordant with the maximum horizontal stress orientation, while the minimum horizontal stress orientation is obtained by the hole collapse direction and macroaxis orientation. The fast S-wave orientation from auisotropic imaging map by dipole acoustic logs means the maximum horizontal stress azimuth. The orientation frequency diagram of maximum horizontal stress for drilling-induced fractures, hole collapse and fast S- wave azimuth is presented according five wells＂ electric imaging logs and dipole acoustic logs. The major orientation indicates that the present maximum horizontal stress azimuth of Che-66 well area is the orientation of NWW-SEE, basically accordant with the strike of basin-dipping fractures adjacent to this well area, reflecting the hereditability of terrestrial stress field.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2009年第3期369-372,共4页
Xinjiang Petroleum Geology
关键词
成像测井
声波测井
地应力
钻井
裂缝
imaging logging
acoustic log
terrestrial stress
drilling
＇ fracture
