岩性油气藏  2012, Vol.24 Issue (4): 121-124  
考虑流体压缩性的应力敏感油藏水平井稳定渗流模型
1.中国石化西南油气分公司广西采油厂,广西田东531500; 2.中国石化西南石油局井下作业公司,四川德阳618000; 3.中国石油山东天然气管道有限公司青岛分输清管站,山东胶州266300;4.中国石油管道公司中原输油气分公司阀门技术服务中心,山东德州253000>
A steady seepage flow model of horizontal wells based on fluid compressibility and stress sensitivity
1. Guangxi Oil Production Plant, Southwest oil & Gas Company, Sinopec, Tiandong 531500, China; 2. Downhole ServiceCompany, Southwest Petroleum Bureau, Sinopec, Deyang 618000, China; 3. Qingdao Points Lost Pigging Station,Shandong Natural Gas Pipeline Company Ltd., CNPC, Jiaozhou 266300, China; 4. Technology Service Center,Zhongyuan Oil & Gas Transportation Company, CNPC, Dezhou 253000, China>

摘要

将水平井的渗流场划分为以水平井两端点为焦点的椭球体内部三维渗流和以椭圆柱状直井为中心
的外部平面渗流,分别推导出内部渗流区域和外部渗流区域考虑流体压缩性和油层应力敏感性的渗流模
型,再利用保角变换和等值渗流阻力法来整合内外部渗流,最终求得考虑流体压缩性和油层应力敏感性
的水平井稳定渗流产能公式。与经典公式对比计算表明,该公式合理、可靠。考虑流体压缩性和油层应力
敏感性,即α≠0 时,水平井产量与生产压差不再呈线性关系;产量随CK的增大而减小,随Cρ的增大而增大;当储层的应力敏感性较强时,产量随生产压差增大而增加缓慢。

Abstract

The seepage field of horizontal wells can be divided into outer region, which is a radial flow to an ellipse
vertical well, and inner one, which is an ellipsoid flowto horizontal well. Each seepage model is deduced considering
fluid compressibility and stress sensitivity, and then the formula for the performance of horizontal well is gained by utilizing conformal transformation and equivalent flow resistance law. Compared with classic formula,
the derived formula is reasonable and reliable. When considering fluid compressibility and stress sensitivity, it means
when α is not equal to zero, there is no longer a linear relationship between conduction of horizontal well and the
drawdown pressure; the production will decrease with the increasing of CK and increase with the increasing of Cρ .
When stress sensitivity is strong, it increases slowly with the increasing of drawdown pressure.

基金资助

国家科技重大专项“火山岩气藏完井优化与产能评价”(编号:2008ZX05054)资助

引用本文

[中文]
张强,刘生国,张俊松,王健,冯京莎. 考虑流体压缩性的应力敏感油藏水平井稳定渗流模型[J]. 岩性油气藏, 2012, 24(4): 121-124.
[英文]
ZHANG Qiang1, LIU Shengguo2, ZHANG Junsong2, WANG Jian3, FENG Jingsha4. A steady seepage flow model of horizontal wells based on fluid compressibility and stress sensitivity[J]. LITHOLOGIC RESER VOIRS, 2012, 24(4): 121-124.
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