不稳定方法在低渗透气藏产能评价中的应用  

APPLICATION OF TRANSIENT TESTING METHOD IN LOW PERMEABLE GAS RESERVOIRS FOR PRODUCTIVITY EVALUATION

作　　者：张仕强 任山 

机构地区：[1]中石化西南分公司川西采输处 [2]中石化西南分公司井下作业处

出　　处：《天然气勘探与开发》2005年第4期24-27,33,共5页Natural Gas Exploration and Development

基　　金：国家自然科学基金资助项目(编号:90210022)

摘　　要：“一点法”在气井产能测试中被广泛应用。但在低渗透气藏中,由于气井不稳定渗流时间很长,“一点法”测试难以有效评价气井产能。文中以气井不稳定渗流为基础,在现有“一点法”测试的基础上,提出了针对低渗透气藏不稳定流动的“一点法”测试新方法。该方法将气井的绝对无阻流量与生产时间联系在一起,反映了低渗透气井产能的实际特征,能较好地预测不稳定流动状态下气井的产能变化。'One point method' is widely applied in gas wells for productivity testing.But in low permeable gas reservoirs,it is difficult for 'one point method' to evaluate productivities of gas wells effectively because it will take very long time for instable percolation of gas wells.According to the instable percolation of gas wells,based on the existing 'one point method',a new testing method of 'one point method' is proposed aiming at the characteristics of the instable percolation of low permeable gas reservoirs.The method connects absolute open flow rate with production time of the gas well and reflects the real features of the productivity of low permeable gas wells.It can predict productivity variation of gas wells under the conditions of instable percolation very well.

关 键 词：低渗透储集层 气井产能 无阻流量 不稳定 计算方法 

分 类 号：TE328[石油与天然气工程—油气田开发工程]