低渗透气藏采收率预测研究  

Study on predicting the recovery efficiency of low permeability gas reservoirs

作　　者：穆中奇 代金友[1] 赵正军[2] 吕利刚[2] 代恒[2] 张子为[2] MU Zhongqi(College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249)

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油长庆油田公司第一采气厂

出　　处：《石油地质与工程》2018年第6期70-72,120,共4页Petroleum Geology and Engineering

基　　金：国家科技重大专项"复杂油气田地质与提高采收率技术"(2008ZX05009-004-03);中国石油大学(北京)科研基金"柳杨堡气田气水分布规律及气井出水机理研究"(2462015YQ0214)

摘　　要：低渗透气藏的渗透率低、非均质性强,开发气藏时动用不均一,给计算采收率带来困难,为此,提出了更适合低渗透气藏的采收率计算方法。针对气藏动用很不均衡的特点,对各生产井分别计算:采用了盈亏平衡法、气井垂直管流理论、气井产能方程、物质平衡法等方法,最终提出了预測现有井网形式下的低渗透气藏采收率方法。靖边气田S井区实际应用表明,计算的采收率为49. 4%,和实际情况较接近,与同类型气藏相比处于较高水平。Low permeability gas reservoir is particularly low in permeability and strong in heterogeneity, which easily causes the extremely uneven employment of the whole gas reservoir during development and brings inconvenience to the calculation of recovery. In order to propose a method more suited to low permeability gas reservoirs for calculating the recovery, the strategy that calculate each production well separately was adopted in consideration of the disequilibrium of employment, then a method for predicting the recovery of low permeability gas reservoir under the existing well pattern was proposed, which was based on break-even analysis, theory of vertical pipe flow in gas well, deliverability equation and material balance equation. The S area in Jinghian gas field was taken as an example of calculating the recovery and the result was49.4%, which was obviously lower than that of middlehigh permeability dry gas reservoir.

关 键 词：靖边气田 低渗透气藏 可采储量 采收率 

分 类 号：TE372[石油与天然气工程—油气田开发工程]