镇泾地区曙光油田延长组构造裂缝分布评价  

Evaluation on Distribution of Structural Fractures of Yanchang Formation of Shuguang Oilfield of Zhenjing Region

作　　者：周文[1] 林家善[1] 张银德[1] 景小燕[1] 高雅琴[1] 戴建文[1] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室(成都理工大学),四川成都610059

出　　处：《石油天然气学报》2008年第5期1-4,376,共4页Journal of Oil and Gas Technology

摘　　要：根据曙光油田延长组岩心、常规测井等资料,对研究区井剖面中的裂缝发育情况及平面上裂缝的分布情况进行了预测,并对地层中裂缝的参数进行了计算。结果表明,地层中主要有构造成因的垂直裂缝、高角度斜交裂缝及重力卸载作用形成的层理、纹理缝,垂直缝及高角度斜交缝是主要的有效裂缝,裂缝延伸长度大且无充填或充填少量的方解石。由于地层中的有效裂缝主要是构造裂缝,因此采用反映构造变形的主曲率法和构造滤波技术对研究区的构造裂缝发育情况进行了预测评价。研究结果表明:构造轴线、高点、构造鼻隆等变形大的部位且正向构造叠加次数多的区域,裂缝相对越发育。According to the core and conventional log data from Yanchang Formation in Shuguang Oilfield,the fracture development on well profile and possible distribution in studied area was predicted,the parameters of fractures were estimated and evaluated.The results show that there exist vertical and high-angle oblique fractures of tectonic origin as well as bedding and texture fractures of gravity-unloading.The vertical and high-angle oblique fractures are effective ones with long extension length and uncovered or little covered by calcite.And the structural fracture distribution in the studied area is predicted and evaluated by applying the principal curvature and the structural filter for structural deformation.Study shows that developed fractures should be found in locations of high curvature and high stack fold numbers of positive structure such as structural axes,structural high and structural nose,etc.

关 键 词：镇泾地区 延长组 构造裂缝 主曲率法 构造滤波技术 

分 类 号：P618.13[天文地球—矿床学]