渤南地区地应力方向及裂缝展布规律分析

Crustal stress orientation and fracture distribution pattern in Bonan area

裂缝性储层是非常规油气主要的储层类型。研究裂缝走向直接关系到该类油藏的井位部署。而裂缝的展布方向与应力场的分布密切相关。在充分利用成像测井资料的基础上,以井壁坍塌原理为指导,通过经验应力分析,明确了罗家地区沙三段、沙四段的应力方向;根据得到的最大、最小主应力方向,推断研究区域内裂缝为北东—南西走向,现今地应力的走向与储层裂缝的走向近似平行。

The fractured reservoir is the main reservoir type of the unconventional hydrocarbon, the understanding of the fracture orientation is very important to the well location deployment of this type of reservoir. The fracture distribution orientation is in close relationship with the distribution of the stress field. Based on the use of the image log information and took the rule of the borehole wall sloughing as guidance, the crustal stress orientation of the Es3 and Es, of Luojia area is understood by analysis of the empirical stress. The fracture orientation is confirmed to be NE-SW in the study area. Nowadays the crustal stress orientation is almost parallel to the reservoir fracture orientation.