摘要
钻井过程中井眼跨塌、水力压裂裂缝的形成与应力场的分布有十分密切的关系。从不对称应力所造成的裂缝、断裂等地层各向异性属性出发,根据横波在各向异性地层中传播时所导致的分裂现象,利用偶极横波成像测井(DSI)资料所提取的快、慢横波信息来指示地层的各向异性特性及其方向。利用现今地应力方向与有效裂缝展布方向关系,对研究区现今最大主应力的方向进行了分析和讨论,该研究结果为钻井施工的顺利进行和储层改造措施的实施提供了依据。
The borehole falling and hydraulic fracture during drilling have a close relation with the distribution of stress field. According to the divided feature of fast and slow shear waves traveling in the anisotropic formation, the anisotropic properties of formation and ground stress direction were indicated by the fast and slow wave information drawn from DSI data. The distribution direction of the greatest principal stress was elementarily analyzed and discussed on the basis of relationship between direction of the current greatest principal stress and distribution direction of the effective fractures in the studied area. The studied result can provide a basis for successively ensuring drilling operation and acid-fracturing treatment.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2005年第4期54-57,共4页
Acta Petrolei Sinica
基金
中国石油天然气集团公司"十五"科技攻关项目"塔里木盆地测井解释技术研究"推广应用课题"全波列测井解释处理系统推广应用"(No.2000070549)部分成果。
关键词
成像测井
偶极横波
地层各向异性
应力场
井眼
裂缝展布
image logging
dipole shear wave
formation anisotropy
stress field
borehole
fracture distribution
