裂缝型底水气藏水侵动态分析方法  

A new method of water influx performance analysis on fracture gas reservoirs with bottom water

作　　者：熊钰[1] 杨水清[2] 乐宏[2] 唐建荣[2] 余翔[2] 

机构地区：[1]西南石油大学石油工程学院 [2]中国石油西南油气田公司蜀南气矿

出　　处：《天然气工业》2010年第1期61-64,共4页Natural Gas Industry

基　　金：四川省天然气开采重点实验室基金项目"裂缝性非均质气藏水侵动态预测方法"(编号:GPL04-07)

摘　　要：对有水气藏水侵动态和储量核实的研究是气藏开发动态分析的基础工作,而针对裂缝型底水气藏相关分析方法的研究还较少,如何利用底水气藏的开发动态数据来研究水体性质及水侵动态,对底水气藏的开发后期实施有针对性的排水采气措施具有重要的实际意义。在参照底水气藏数学模型的基础上,结合针对边水气藏的AIF模型,运用水体影响函数理论,建立了底水驱AIF和压力动态分析模型,得到水体影响下的裂缝型底水气藏水侵动态分析方法,并引入非线性最优化法以获得气藏的水侵动态。利用VisualBasic语言编制气藏水侵动态分析程序,并依据一个实际典型裂缝型底水气藏——川南威远气田的生产数据进行了水侵动态验证分析。实例研究结果表明,该方法可以较为准确获得裂缝型底水气藏动态储量、水体性质和水侵动态,是裂缝型底水气藏水侵动态分析的好方法。The studying of water invasion behavior and reserves substantiation is fundamental work for exploitation performance analysis of aquifer gas reservoirs.However,there is still not enough related research on the fracture gas reservoirs with bottom water.Therefore,using the production data to study the water aquifer character and water invasion performance is very important for performing the measures of drainage gas recovery especially when the life of gas reservoir is coming to the declining period.Thus this paper presents a new kind of aquifer influence function (AIF) of bottom aquifer driving gas reservoirs,the model of which is built up,in combination with the description of the pressure performance characteristics,to get a new method of water influx performance analysis on fracture gas reservoirs with bottom water and analyze the water invasion performance by the nonlinear optimization law.As a case study,this approach was used in the Weiyuan gas reservoir which is a classic fracture gas reservoir with bottom water.The results have indicated that this approach can not only calculate the reserves exactly,but also analyze the aquifer behavior and water invasion performance for those fracture gas reservoirs with bottom water.

关 键 词：底水气藏 水侵 动态分析 底水驱 裂缝(岩石) 数学模型 威远气田 

分 类 号：P618.13[天文地球—矿床学]