考虑相分离影响的低渗透有水气藏试井解释方法  

WELL TEST INTERPRETATION METHOD OF LOW PERMEABILITY WATERED GAS RESERVOIRS AFFECTED BY PHASE SEGREGATION

作　　者：李成勇[1,2] 伊向艺 邓元洲[3] 龚伟 张锦良[5] 

机构地区：[1]成都理工大学"地质资源与地质工程"博士后工作站 [2]成都理工大学能源学院 [3]川庆钻探工程公司钻采工程技术研究院 [4]西南油气田公司重庆气矿 [5]川庆钻探工程公司地质勘探开发研究院

出　　处：《钻采工艺》2010年第6期40-42,154,共3页Drilling & Production Technology

基　　金：教育部博士学科点新教师类基金资助(编号:20095122120012)

摘　　要：部分低渗透气藏在关井过程中产生凝析水,由于气体上升、液体下沉,导致压力恢复曲线异常;受启动压力梯度影响,低渗透气藏不易出现径向流动段,导致低渗透有水气藏试井资料的解释较困难。为此,从渗流基本理论出发,采用Laplace变换等数学手段建立低渗透有水气藏渗流数学模型,获得其在拉氏空间中的无因次井底压力响应。通过计算得到了无因次压力和压力导数双对数理论图版,分析了低渗透有水气藏渗流特征及其影响因素。此研究成果对低渗透有水气藏试井资料的正确解释有一定的指导作用。Some low permeability gas reservoirs will produce condensate water during well shutdown.At the same time,the gas rises and the liquid drops,leading to an abnormal build-up curve.The analysis of well test data in low permeability watered gas reservoirs is very difficult because it is not easy to appear radial flow stage affected by trigger pressure gradient.On the basis of seepage mechanics,a seepage flow mathematical model of low permeability watered gas reservoirs was built up by using Laplace transform,and a dimensionless pressure response function was got finally in Lagrangian space.The double logarithmic plate between dimensionless pressure and pressure derivative was acquired by calculation,the percolation features and its effect factors were analyzed.This research will conduced to explain the well test data in low permeability watered gas reservoirs correctly.

关 键 词：相分离 低渗透 试井解释 有水气藏 

分 类 号：TE353[石油与天然气工程—油气田开发工程]