川中磨溪地区嘉二气藏气水分布规律  

Gas and water distribution regularity of Jia2 gas reservoir in Moxi area,Central Sichuan Basin

作　　者：刘乾乾 罗水亮[1] 阮基富[2] 高达[1] 唐松[2] 李生 漆影强 LIU Qianqian;LUO Shuiliang;RUAN Jifu;GAO Da;TANG Song;LI Sheng;QI Yingqiang(School of Geosciences,Yangtze University,Wuhan 430100,China;Central Sichuan Oil and Gas District,PetroChina Southwest Oil&Gas Field Company,Suining 629000,China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]中国石油西南油气田分公司川中油气矿,四川遂宁629000

出　　处：《天然气地球科学》2024年第12期2264-2276,共13页Natural Gas Geoscience

基　　金：国家自然科学基金青年基金项目(编号:41502104)资助。

摘　　要：嘉二气藏是川中磨溪地区一个特殊的含水气藏,储层非均质性较强、气水关系十分复杂是造成该气藏气井出水严重、产量递减的重要原因,也成为制约气藏高效开发的主要原因。在综合地质资料、前人研究成果、生产动态资料的基础上,采用动静结合的方法,从气水分异程度、储层的物性特征、隔夹层以及异常高压等方面,对嘉二气藏复杂的气水分布关系及其控制因素进行深入研究。结果表明:嘉二气藏横向上气水分布主要受储层物性的非均质性和气水分异程度的影响,储集体之间连通性差,气水分布混杂;纵向上,嘉二气藏稳定分布的膏岩和泥岩隔层将嘉二1亚段和嘉二2亚段分隔为2个相对独立的气水系统,嘉二2亚段是主要的气水分布层和主产层;受多种因素的影响导致嘉二气藏形成了2种气水分布模式,构造起伏带模式下的气井产量高、产能差异大,构造平缓带模式下的气井生产情况普遍较差。气水分布模式的建立为气藏下一步的合理开发工作提供了参考依据。The Jia2 gas reservoir is a special water-bearing gas reservoir in the central Sichuan Basin.The strong heterogeneity of the reservoir and the complex gas and water relationship are the important reasons for the seri⁃ous water production and production decline of the gas well in the gas reservoir,and become the main reason for restricting the efficient development of the gas reservoir.Based on the geological data,previous research results and production dynamic data,the complex gas and water distribution relationship and its controlling factors of Moxi Jia2 gas reservoir were studied from the degree of gas-water differentiation,reservoir physical characteris⁃tics,interlayer and abnormal high pressure by using the method of dynamic and static combination.The results show that the lateral gas and water distribution of Jia2 gas reservoir is mainly affected by the heterogeneity of reservoir physical properties and the degree of gas-water differentiation,and the connectivity between reservoir bodies is poor and the gas and water distribution is mixed;The stable distribution of gypsum rock and mudstone interlayers separates Jia2^(1) and Jia2^(2) sub-members into two relatively independent gas-water systems in longitudi⁃nal direction,and Jia2^(2) sub-member is the main gas and water distribution layer and main producing layer;Due to the influence of many factors,two distribution patterns of gas and water have been formed in the Jia2 gas res⁃ervoir.The gas well production under the pattern of structural undulating zone is high and the productivity differ⁃ence is large,and the gas well production under the pattern of structural gentle zone is generally poor.The estab⁃lishment of gas and water distribution pattern provides a reference for the rational development of the gas reser⁃voir in the next step.

关 键 词：嘉陵江组 磨溪构造 川中地区 气水分布 控制因素 

分 类 号：TE133[石油与天然气工程—油气勘探]