摘要
对于存在微裂缝的油藏,开展储层微裂缝的评价和预测,弄清微裂缝的分布规律,是储层综合评价的重要内容。本文从平面应力场理论分析入手,介绍了简单褶皱的力学模式、复合构造模式,并进行了构造裂缝的理论分析。在此基础上,本文进行了平面应力场的计算,根据最大主应力、最小主应力和剪切应力的分布和方向,可分析古、新构造的纵张裂缝、横张裂缝及剪切裂缝的理论发育及其延伸区。本文方法在W2断块的实际应用中取得较好的效果。
Appreciation and prediction of micro-fractures in reservoir and verifying their distribution are important contents of integrative reservoir appreciation for micro-fractured reservoirs. Starting from analyzing the theory of plane stress field,the paper introduced mechanical mode for simple fold and composite structural mode and analyzed the theory of structural fracture. On that basis, the paper computed plane stress field. According to distribution and direction of major,minor principle stress and shear stress, the theoretical development for longitudinal, transverse and shear tensile fractures of paleo-structure and new-structure and its extension can be analyzed. The method was applied in W2 fault block which gained a good result.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2003年第4期400-404,共5页
Oil Geophysical Prospecting
