元坝气田不同类型储层气水两相渗流特征  

Study on gas-water two-phase flow characteristics in different types of reservoirs of Yuanba gas field

作　　者：黄仕林 杨博文[1] 张娟 汪周华[1] 张明迪 易枫[5] HUANG Shilin;YANG Bowen;ZHANG Juan;WANG Zhouhua;ZHANG Mingdi;YI Feng(Petroleum Engineering School,Southwest Petroleum University,Chengdu City,Sichuan Province,610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu City,Sichuan Province,610500,China;Second Gas Production Plant of SINOPEC Southwest Oil&Gas Company,Langzhong City,Sichuan Province,637400,China;Exploration and Development Research Institute of PetroChina Southwest Oil&Gas Field Company,Chengdu City,Sichuan Province,610000,China;Exploration and Development Research Institute of SINOPEC Southwest Oil&Gas Company,Chengdu City,Sichuan Province,610041,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]油气藏地质与开发工程国家重点实验室,四川成都610500 [3]中国石化西南油气分公司采气二厂,四川阆中637400 [4]中国石油西南油气田分公司勘探开发研究院,四川成都610000 [5]中国石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《油气地质与采收率》2022年第4期122-127,共6页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项“超深层复杂生物礁底水气藏高效开发技术”(2016ZX05017-005)。

摘　　要：气水两相相对渗透率曲线是描述产水气藏气水渗流规律的重要基础参数,但是采用水驱气方法还是气驱水方法来确定气驱水相对渗透率曲线仍存在较大争议。以元坝气田为研究对象,基于室内实验测试方法,系统开展了孔隙型、裂缝型岩心气驱水相对渗透率曲线测试,对比分析不同类型储层岩心气驱水相对渗透率曲线特征,推荐产水气藏气水相对渗透率曲线测试法。结果表明:裂缝型岩心气驱水相对渗透率曲线表现出凹形曲线特征,与常规的X形曲线特征差异较大;与裂缝型岩心比较,孔隙型岩心气驱水相对渗透率曲线整体右移,两相流动饱和度区间范围更宽、水相相对渗透率上升更慢。与气驱水方法相比,水驱气相对渗透率曲线的束缚水饱和度更接近储层实际情况、水相渗流能力弱、气相渗流能力大于水相,实验设计符合产水气藏气水渗流过程。因此,针对产水气藏的产能评价、开发方案编制等,建议采用水驱气法测试的气驱水相对渗透率曲线开展模拟计算。The gas-water relative permeability curve is an important basic parameter to describe the gas-water flow law of water-producing gas reservoirs.However,it is still controversial to determine the gas-water relative permeability curve by the water-drive-gas method or the gas-drive-water method.Taking reservoirs in Yuanba gas field as the research objects,the systematic laboratory experiments were conducted to study the gas-water relative permeability curves of porous and fractured cores.The gas-water relative permeability curves of cores from different types of reservoirs were compared and analyzed,and the test method was recommended for the gas-water relative permeability curves in water-producing gas reservoirs.The results demonstrate that the gas-water relative permeability curves of fractured cores are concave,which are quite different from conventional X-shaped curves;compared with that of fractured cores,the gas-water relative permeability curves of pored cores move to the right as a whole;the ranges of two-phase flow saturation are wider,and the water phase relative permeability rises more slowly.Compared with that by the gas-drive-water method,the irreducible water saturations from the permeability curves by the water-drive-gas method are closer to the actual situation of the reservoir;the water phase flow capacity is weak,while the gas phase flow capacity is greater than that of the water phase.The experimental design is in line with the gas-water flow process in water-producing gas reservoirs.Therefore,for the productivity evaluation and development plan design for water-producing gas reservoirs,it is recommended to use the gas-water relative permeability curve tested by the water-drive-gas method for numerical simulation.

关 键 词：相对渗透率曲线 水驱气 气驱水 孔隙型储层 裂缝型储层 元坝气田 

分 类 号：TE312[石油与天然气工程—油气田开发工程]