摘要
本文在岩芯描述和三维有限元数值模拟的基础上，对大安油田裂缝的分布特征、发育规律、分组裂缝所起作用及其对开发的影响等方面进行了综合评价。大安油田储层中发育了受沉积微相和构造控制的四组裂缝。它们在现应力场作用下，目前以近东西向裂缝的渗透性最好，在动态上反应最明显，其次是北西向和北东向的裂缝，而近南北向裂缝作用较小。在该油田的泥岩中，同时发育高角度构造裂缝和低角度层间滑脱裂缝，使泥岩的吸水严重，影响着油田的开发效果。
Based on the core description and three dimensional finite element numerical simulation, the authors comprehensively evaluated the distribution characteristics, development rule and effect on exploitation of different fracture groups .There are four group fractures which were controlled by sedimentary microfacies and structure in Daan oil field. Under the effect of modern stress field, the permeability of the EW fracture is the best, then the NW and NE fractures, the NS fracture is the worst. The mudstone partings absorb water seriously and have important influence on exploitation effect because both hig dip tectonic fracture and low dip bedding detachment fracture are developed well.
出处
《高校地质学报》
CAS
CSCD
1998年第4期459-464,共6页
Geological Journal of China Universities
