产水对低渗气藏气井流入动态的影响  

Influence of Water Producing on Gas- well's Inflow Performance in Low- permeability Gas Reservoir

作　　者：王天龙[1] 袁淋[1] 刘从领[2] 汪文斌 

机构地区：[1]西南石油大学石油工程学院,成都610500 [2]江苏油田石油工程技术研究院,江苏扬州225009 [3]西南油气田分公司天然气研究院院中试生产实验室,四川泸州610213

出　　处：《重庆科技学院学报（自然科学版）》2015年第1期6-8,43,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项(2009E-0307);西南石油大学创新基金项目(GIFSS1122)

摘　　要：低渗气藏由于储层具有低孔低渗的特征,气井产能普遍较低,而气井产水则严重影响了气井产能的发挥,从而加大了气藏开发的难度。基于平面径向渗流原理,定义气水两相拟压力以及气水两相启动压力梯度,考虑启动压力梯度、应力敏感、滑脱效应、表皮效应及紊流效应对产能的影响,推导出了低渗气藏气水同产井三项式产能公式。实例分析表明气井产水将会降低气相驱动动力,使气井无阻流量降低43.58%。The characteristics of low porosity and low permeability in gas reservoir will lead to low productivity of gas well,so it is of great development difficulty. Based on the theory of radial seepage in gas reservoir,the author defined the pseudo- pressure and start- up pressure gradient of gas- water two phase,considering influence of stress sensitivity,slippage effect,skin effect and turbulence effect on productivity,and tried to deduce the trinomial productivity formula of gas- water well in low- permeability gas reservoir. Case study shows gas well producing water will cut down the reservoir drive energy,and eventually influence the absolute open flow of gas well,which has been reduced by 43. 58%.

关 键 词：低渗气藏 产水 启动压力梯度 应力敏感 滑脱效应 无阻流量 

分 类 号：TE331.1[石油与天然气工程—油气田开发工程]