摘要
大多数低渗气藏具有明显的变形效应,对此一般采用流固耦合方法来处理,但是其算法非常复杂。为此,提出了一种简单的变形效应处理方法,适合于工程上使用。该方法先建立渗透率与压力的函数,再根据渗透率压力敏感实验的结果计算出渗透率修正系数,这能够简单而准确地考虑变形效应对流动的影响,并且在通用数值模拟软件上可以使用。用此法研究了变形效应对选择合理生产压差的影响,结果表明是否考虑变形效应对预测的产量有很大影响,而在低渗气藏生产中,超过某一界限的生产压差并没有明显地提高产量的作用。
Obvious deformation effect,which is usually treated with complex fluid-solid coupling method,exists in most low-permeability gas reservoirs.In the paper,a simple treatment method was provided,available for engineering applications.Through this method,a function of permeability and pressure is firstly set up,then,permeability modification factor is calculated according to the results of permeability-pressure sensitivity experiment.Thus,the effect of deformation on fluid flow is easily and accurately included,as well realizable in numerical simulation software.This method was used to study the effect of deformation on the decision of reasonable production pressures.The results showed that the deformation effect had great influence on production forecast,and for production from low-permeability reservoirs,pressure differentials higher than certain value had little effect for production improvement.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2007年第2期93-94,106,共3页
Natural Gas Industry
基金
长江大学"油气资源与勘探技术"教育部重点实验室(编号:K200613)资助。
关键词
低渗透油气藏
岩石变形
生产压差
选择
增产
low-permeability reservoirs,rock deformation,producing pressure differential,selection,production improvement
