松辽盆地徐深气田致密火山岩气藏气水分布特征及主控因素  

Characteristics and major controlling factors of gas-water distribution in tight volcanic gas reservoir in Xushen gas field,Songliao Basin

作　　者：周翔 于世泉 张大智 于海生 陈曦 Zhou Xiang;Yu Shiquan;Zhang Dazhi;Yu Haisheng;Chen Xi(Exploration and Development Research Institute,Daqing Oilfield Branch Company,Daqing,Heilongjiang 163712,China)

机构地区：[1]中国石油大庆油田分公司勘探开发研究院

出　　处：《石油与天然气地质》2019年第5期1038-1047,共10页Oil & Gas Geology

基　　金：国家自然科学基金项目(40372066);国家科技重大专项(2016ZX05047-001)

摘　　要：松辽盆地徐深气田是典型的致密火山岩气藏。随着气藏开发不断深入,气井陆续出水,强烈的水侵和水气比不断攀升严重制约了气藏的高效开发,正确认识火山岩气藏内气水关系及其主控因素已成为提高气井产能的重要因素。研究区火山岩气藏气水关系复杂,总体表现为“上气下水”特征,气水分布以火山机构为基本单元,全区无统一气水界面,同一火山机构内可存在多个气水系统,不同的气水系统也可具相同的气水界面。在营城组火山机构刻画的基础上,综合利用生产测试和物性、压汞、薄片等动静态资料,系统分析徐深气田致密火山岩气藏气水分布特征,明确火山岩气藏气水关系主控因素。结果表明:烃源岩展布控制了营城组火山岩气藏气水的宏观分布,火山机构和构造联合作用影响天然气的聚集、调整,火山岩复杂的孔隙微观结构制约着储层内气水分异。Xushen gas field is a typical tight volcanic gas reservoir located in Songliao Basin.With the development of gas reservoir in depth,water breakthrough in wells appears,and the intensive water invasion and rising gas-water ratio have severely restricted the efficient development of volcanic gas reservoir.Therefore,the understanding of inner gas-water distribution,along with its major controlling factors,has becoming a key in enhancing gas well productivity.In the study area,the gas-water distribution is complex in the volcanic gas reservoir,and characterized by“gas on top and water at bottom”overall.Besides,volcanic edifice is the elementary cell of gas-water distribution;there is no unified gas-water interface throughout the study area,while more than one gas-water systems may exist in the same volcanic edifice;and different gas-water systems may share a gas-water interface.Based on the description of volcanic edifices in the Yingcheng Formation,we systematically analyzed the gas-water distribution characteristics of,and clarified the major factors controlling the gas-water distribution in the tight volcanic gas reservoir in Xushen gas field,using production test,as well as some static data in terms of physical property,mercury intrusion porosimetry(MIP)and thin section.The results show that the source rock distribution controls the macroscopic gas-water distribution in the volcanic gas reservoir in the Yingcheng Formation,while the volcanic edifice and structure have jointly had an influence on the accumulation and adjustment of gas,and the complicated microstructure of volcanic rocks is a key to gas-water fractionation in the reservoir.

关 键 词：气水关系 火山机构 火山岩气藏 营城组 徐深气田 松辽盆地 

分 类 号：TE122.3[石油与天然气工程—油气勘探]