储层裂缝宽度应力敏感性可视化研究  

STUDY ON VISUALITION FOR STRESS SENSIBILITY OF FRACTURE WIDTH IN RESERVOIR

作　　者：张浩[1] 康毅力[1] 陈景山[2] 陈一健[1] 吴娟[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室 [2]西南石油大学资源与环境学院

出　　处：《钻采工艺》2007年第1期41-43,共3页Drilling & Production Technology

基　　金：四川省青年科技基金项目(02ZQ026-042);油气藏地质及开发工程国家重点实验室基金项目(PLN9720)。

摘　　要：油气资源开发过程中应力环境变化引发的渗透率敏感性问题在天然裂缝性储层中表现尤为明显。裂缝性储层应力敏感性本质是有效应力增加不断压缩裂缝空间导致了储层渗流能力减弱,因此,裂缝宽度应力敏感性与渗透率应力敏感性研究同等重要。目前为止,仍然缺乏对微观裂缝宽度变化特征直接描述的有效手段。基于应力敏感性实验原理,自行设计研制了加载岩石微观图像分析系统,能够对加压条件裂缝图像宽度变化特征进行直观量测。与其它加载裂缝宽度测量方法相比,应用加载岩石微观图像分析法具有易操作、更直观、更经济的优点,加载岩石微观图像分析系统丰富了直观测量微裂缝宽度的有效手段,其宽度参数变化特征测量结果与岩心造缝模拟应力实验法裂缝宽度求取结果具有良好的一致性。The stress sensitivity of permeability is very distinguished in natural fractured reservoir with the transformation of stress circumstance during the development of oil and gas reservoirs. The essence of stress sensitivity of fractured reservoir is that the continuously increasing effective stress declines the permeability of reservoir by reducing fracture width. So, study on stress sensitivity of fracture width is the same importance as stress sensitivity of permeability. Up to date, there is still absence of measurement to directly descript micro-fracture width under applied forces. On the basis of the principle of stress sensitivity experiment, the loading analysis system for microscopic image of rock has been developed, which can measure the variation of fracture width. Versus other loading analysis systems for fracture image, the system presented in this paper is easier operation, more intuitive, and more profitable, which has enriched the measurement of microscopic fracture width. The result of fracture width variation with effective stress measured by the loading analysis system for microscopic image of rock is accordant to the result of test of created fracture by simulating stress alteration.

关 键 词：储层 天然裂缝 裂缝宽度 应力敏感性 岩心 可视化 

分 类 号：P618.13[天文地球—矿床学]