摘要
为研究不同渗流特征对致密气藏水平井产能的影响,以川西中浅层致密砂岩新场-沙溪庙组(XS)气藏参数场为基础,运用商业软件CMG(2012版)建立精细机理模型,模拟计算了启动压力梯度、应力敏感、高速非达西渗流和滑脱效应对水平井渗流和产能的影响。结果表明,当启动压力梯度达到0.05 MPa/m时,累产气量减少4%;当启动压力梯度小于0.01 MPa/m时,其影响很小,工程上可忽略;应力敏感使日产气量降低,累产气量减少24%,影响程度较大;高速非达西渗流,水平井累计产气量降低约1%~2%,压力波及程度变小,总体上对低渗气藏影响较小;滑脱效应系数为有利因素,但主要在低压阶段表现出来。因此,在致密砂岩气藏开采过程中应充分研究不同渗流机理对产能的影响及工程适用性。
To study the influence of different percolation characteristics on dense gas reservoir horizontal well productivity, shal-low XS tight sandstone gas reservoir parameters in the field in west Sichuan as the basis, fine mechanism model was set upusing the commercial software CMG （2012）,the influences of start-up pressure gradient, stress sensitivity, high-speed non-Darcy seepage flow and slippage effect on horizontal well productivity were simulated and calculated. The results show that the exhaus-ted gas isdecreased by 4 percentwhenstart-up pressure gradient isat 0. 05 MPa/m. After the start-up pressure gradient is less than 0. 01 MPa/m, its effect is very small, engineering can be ignored. The stress sensitive makes daily gas is reduced, tired gas isde-creased by 24 percent, the influence is bigger. The high-speed non-Darcy seepage, cumulative yield decreases about 1-2 percent, the degree of pressure spread is smaller, and the influence of low permeability gas reservoir is small Slippage effect coefficient is a favorable factor, but is mainly reflected in the low voltage phase. Therefore, tight sandstone gas reservoir exploitation should fully study the influence of different percolation mechanism on capacity and engineering applicability.
作者
薛洪刚
汤勇
郭慧玲
闫兆金
汪洋
XUE Honggang TANG Yong GUO Huiling YAN Zhaojin WANG Yang(College of Petroleum Engineering,Southwest Petroleum University,Chengdu 610500？ China Gas Production Factory,Zhongyuan Oil Field Puguang Branch,SinopeCf Dazhou, Sichuan 636156？ China)
出处
《中国科技论文》
北大核心
2017年第3期263-268,共6页
China Sciencepaper
基金
国家自然科学基金资助项目(51274173)
关键词
致密气藏
渗流机理
水平井产能
数值模拟
压力波及范围
dense gas reservoir
seepage mechanism
horizontal well production
numerical simulation
pressure range
