摘要
火山岩气藏已成为中国石油重要的天然气勘探和开发的主要领域之一。根据火山岩气藏特征,用小岩心和全直径岩心对火山岩气藏岩石进行了大量的应力敏感性实验,分析了不同因素对火山岩岩样应力敏感性的影响。研究表明:不同渗透率的小岩心和全直径岩心,其渗透率都随有效压力的升高而下降;与小岩心相比,全直径岩心渗透率随有效压力的升高而下降幅度要大。裂缝或孔洞的发育程度和含水饱和度对火山岩岩心的应力敏感性有较大的影响:裂缝越发育,应力敏感性越强;含水岩样的渗透率随有效压力增大而降低的幅度要大于干燥的岩样。
Volcanic gas reservoir becomes an important domain of natural-gas E & P for PetroChina. In this study, based onthe reservoir characteristics, a lot of stress experiments on volcanic rock are carried out by core and full-diameter core analysis; andthe effect of different factors on stress sensitivity is also summed up. It is shown that for small cores with different permeability and full-diameter cores, the permeability decreases along with an increase of effective pressure; compared with the permeability of smallcores, the permeability of full-diameter cores decreases more along with an increase of effective pressure; in addition, the development degree of both fracture and pore as well as the water saturation have a larger effect on stress sensitivity: more developed fractureis, stronger stress sensitivity is; compared with the permeability of dry rock sample, the permeability of rock sample with water decreasea more along with an increase of effective pressure.
出处
《天然气勘探与开发》
2011年第1期29-31,38,共4页
Natural Gas Exploration and Development
基金
国家重点基础研究发展规划(973)项目(2007CB209500)
国家自然科学基金(No.10672187)联合资助
关键词
火山岩气藏
应力敏感性
含水饱和度
裂缝
实验
volcanic gas reservoir, stress sensitivity, water saturation, fracture, experiment
作者简介
杨正明，男，1969年出生，2009年获中国石油大学博士后，现为中国科学院渗流流体力学研究所高级工程师，武汉工业学院客座教授；主要从事渗流理论、低渗透油田扣火山岩气葳开发方面的研究工作。地址：（065007）中国石油勘探开发研究院廊坊分院。E—mail：yzmhxj@263．net
