物质平衡法计算缝洞型凝析气藏动态储量  

Calculation of Dynamic Reserves in Fractured-Vuggy Gas Condensate Reservoirs with Material Balance Method

作　　者：王娟[1,2] 郭平[2] 王芳[3] 程亮 邹波[1] 

机构地区：[1]中国石油西南油气田分公司,四川成都610000 [2]西南石油大学,四川成都610000 [3]中国石化河南油田分公司,河南南阳473132 [4]中国石油川庆钻探工程公司,四川成都610000

出　　处：《特种油气藏》2015年第4期75-77,154-155,共3页Special Oil & Gas Reservoirs

基　　金：西南石油大学博士点基金项目"高温高压多组分凝析气非平衡相态理论模型研究"(20115121110002)

摘　　要：与一般砂岩凝析气藏不同,缝洞型碳酸盐岩凝析气藏以裂缝-孔洞和基质孔隙作为储集空间,地下缝洞尺寸差异很大,渗流规律复杂。从摩尔质量守恒角度出发,引入缝洞孔隙度概念来描述缝洞空间体积占储层表观总体积的比例,建立并推导适合无边底水缝洞型凝析气藏衰竭式开发的物质平衡方程,应用该方程可分别求取基质系统与缝洞系统的储量。实例计算证明,该方程可在有效计算气井储量的同时计算缝洞体系的储量,对于评估缝洞型凝析气藏的稳产能力具有重要意义。Unlike conventional sandstone gas condensate reservoirs,the fractured- vuggy carbonate gas condensate reservoirs have complicated seepage flow laws,where facture – vug and matrix pores are storage spaces and underground fracture – vug size differs greatly. Starting from molar mass conservation,the concept of fractured – vuggy porosity is introduced to describe the ratio of fracture – vug space volume to apparent reservoir bulk volume,and the material balance equation applicable for fractured- vuggy gas condensate reservoirs without edge / bottom water is established. According to this equation,reserves in matrix system and fracture- vug system could be obtained respectively. The calculation examples showed that,this equation could be used to calculate the reserves in gas wells as well as the reserves in fracture- vug system,and it is meaningful for evaluating the rate-maintenance capacity of fractured- vuggy gas condensate reservoirs.

关 键 词：缝洞型凝析气藏 物质平衡方程 缝洞孔隙度 摩尔质量守恒 储量计算 

分 类 号：TE33[石油与天然气工程—油气田开发工程]