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不同开采方式下应力敏感对低渗气藏的影响
断块油气田
2007年 14卷 第02期
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Title
Inf luence of stress sensibility on low permeability gas
reservoir in different production methods
Authors
Zhang Li,ZhangMaolin, MeiH aiyan.
单位
西南石油大学研究生院, 四川成都610500
Organization
SouthwestP etroleum University, Chengdu
610500, China
摘要
低渗气藏存在明显的应力敏感性。文中采用固定围压、改变内压(四升四降内压)的方法, 研究内压变化对储集层渗透率的影响, 同时分析评价渗透率的应力敏感性。根据实验结果, 采用数值模拟软件对苏里格气田的低渗气井进行不同的开采方式研究, 进一步论证应力敏感对低渗气井开采带来的影响, 提出合理的开采方式, 为低渗透气藏的开采提供参考。
Abstract
M any resea rches indicate that the ex istence o f stress
sensibility appears frequently in low perm eability gas
reservo ir. The me thod of fix ing per ipheral pressure and
alter ing interna l pressure, nam e ly, the chang e o f e ffectiv e
stress, is d iscussed in this pape r to study the e ffect of the
reservo ir perm eab ility caused by the a lternation of the interna l
pressure, and to ana lyze the stress sensibility of perm eab ility
at the sam e tim e. Based on the resu lts of the expe rim en t, the
num erical simu lation so ftw are Ec lipse is utilized to study the
d ifferen t m eans of production abou t a low perm eab ility gas
w e ll in Sulige gas fie ld. A compar ison be tw een the con tinuous
production and the in term ittent production w ill dem onstra te
the impact brough t by the stress sensib ility on low
perm eab ility gas reservoir. And the reasonab le m eans o f
production is brough t forw ard in o rder to prov ide the re ference
for the exp lo itation o f low perm eability gas reservo ir.
关键词：
应力敏感 有效应力 低渗气藏 连续式生产 间歇式生产 数值模拟;
Keywords:
stress sensib ility, effec tive stress, low
perm eab ility gas reservo ir, con tinuous production, inte rm ittent
production, num er ica l simu lation;
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