苏里格气田西部S48区气水分布特征  

Gas-water distribution characteristics in S48 block,western Sulige Gas Field

作　　者：冯强汉[1] 阳生国[1] 熊哲[1] 高航[1] 张佳超[1] 杨懿[2] 杨振 FENG Qianghan;YANG Shengguo;XIONG Zhe;GAO Hang;ZHANG Jiachao;YANG Yi;YANG Zhen(No. 3 Gas Production Plant,PetroChina Changqing Oilfield Company,Wushenqi 017300,Inner Mongolia,China;School of Petroleum Engineering,Xi'an Shiyou University,Xi'an 710065,China;Department of Geology,Northwest University,Xi'an 710069,China)

机构地区：[1]中国石油长庆油田分公司第三采气厂,内蒙古乌审旗017300 [2]西安石油大学石油工程学院,西安710065 [3]西北大学地质学系,西安710069

出　　处：《岩性油气藏》2019年第5期61-69,共9页Lithologic Reservoirs

基　　金：国家重大科技专项“柴达木复杂构造区油气成藏关键勘探技术与新领域目标优选”（编号：2016ZX05003-006）;国家高科技研究发展计划（“863”计划）“二氧化碳地质封存关键技术”（编号：2012AA050103）联合资助

摘　　要：苏里格气田西部盒8段、山1段为主力产层,气水关系十分复杂,投产气井大多存在不同程度产水现象,严重影响了气井正常生产和产能评价部署。基于试气、动态监测资料,分析苏里格气田西部S48区产水气井和不产水气井生产曲线特征的差异性,将生产井划分为3种类型,即试气和生产中均无水型、试气无水但生产中出水型、试气和生产中均出水型,进而以生产动态资料和试气资料作为约束,分析出水井出水部位所对应的测井曲线特征。结果表明:试气无水但生产中出水井,若测井含气响应良好,试气结论为气层,生产出水的水源多为产层上下围岩中的地层水,若测井响应较差,试气结论为含气层,则生产出水的水源多为产层内的毛细管水;试气和生产中均出水型井,测井解释、试气结论多为气水同层,生产出水的水源多为产层内的自由水;将测井资料结合试气、生产资料综合分析,有利于判断气层、水层;含气层与气水同层测井响应特征相似,在电阻率-声波时差交会图中均分布于气层区、干层区、水层区之间的过渡区域。根据气藏中气层、含气层、气水同层、干层、水层的纵向配置关系,将气水分布纵向特征划分为5种类型,即纯气型、上气下水型、上干/水下气型、气水共存型、气层与干/水层间互型,并针对不同类型的气水分布,分别提出了工程改造措施。He 8 member and Shan 1 member are the main production layers in western Sulige Gas Field.The gaswater relationship is complex,and most of the gas wells produce water,which seriously affects the normal production of gas wells and deployment plan design of blocks.Based on gas test and dynamic monitoring data,the differences of production curve characteristics between water-producing gas wells and non-water-producing gas wells in block S48 of western Sulige Gas Field were analyzed.The production wells were divided into three types:non-water-producing in gas test and production process,non-water-producing in gas test but producing water in production process,producing water in gas test and production process.Then the characteristics of logging curve of water-producing well were analyzed by the constraint of dynamic production date and gas test data.The results show that:For the wells with non-water-producing in gas test but water-producing in production process,if logging data reflects good,gas test conclusion is gas layer,then the water source is mostly from the upper and lower adjacent layers;if the logging response is poor and the gas test conclusion is gas layer,the water source is mostly from the capillary water in the production layer.For the wells that with water-producing in gas test and production process,the logging interpretation and gas test conclusions are mostly gas-water layers,the water source is mostly from free water and capillary water in the production layer.Comprehensive analysis of logging data combined with gas test and production data is useful to identify gas and water layers.Gas-bearing layer and gas-water layer have similar logging response characteristics,and they are all distributed in the transitional zone between gas layer,dry layer and water layer in the resistivity-acoustic moveout crossplot.Five types of gas-water distribution were divided:pure gas,gas above the water,dry(water)above the gas,gas-water coexi-stence,gas layer inter-distributed between dry/water layer.Engineering reform

关 键 词：产水井 气水分布 自由水 毛细管水 测井响应 苏里格气田 

分 类 号：TE341[石油与天然气工程—油气田开发工程]