库车拗陷野云2致密砂岩气藏地质特征及成藏机制  

Geological feature and accumulation mechanism of Yeyun 2 tight sandstone gas reservoir in the Kuqa depression

作　　者：曹少芳[1] 李峰[2,3] 张博[1] 姜振学[2,3] 秦红[1] 李卓[2,3] 邢星[1] 杜忠明[2,3] 李鑫[4] 

机构地区：[1]塔里木油田公司勘探开发研究院,新疆库尔勒841000 [2]中国石油大学(北京)非常规天然气研究院,北京102249 [3]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [4]大庆油田有限责任公司第三采油厂,黑龙江大庆163000

出　　处：《东北石油大学学报》2014年第3期42-48,7-8,共7页Journal of Northeast Petroleum University

基　　金：国家自然科学基金项目(40972088);国家重点基础研究发展计划(973计划)项目(2011CB201105);国家油气重大专项(2011ZX05003-001)

摘　　要：运用包裹体岩相学观察、显微测温等方法,分析油气充注历史,利用岩心、薄片等资料恢复孔隙度演化史,确定野云2致密砂岩气藏的成藏过程.结果表明:野云2致密砂岩气藏主要具有以康村期少量原油充注、库车期以来天然气充注为主的两期油气充注历史;白垩系储集层孔隙度在中新世以来迅速下降,在上新世致密化,演化至现今孔隙度约为5.9%;经历"康村期早期原油充注、库车期天然气充注、西域期以来调整破坏"3期成藏过程.该研究结果对库车拗陷东部野云地区的致密砂岩气藏勘探具有指导意义.In order to define the geological feature and accumulation mechanism of Yeyun 2tight sandstone gas reservoir in the Kuqa depression,the hydrocarbon charging history has been confirmed through the method of fluid inclusion petrological observation and microthermometric analysis.The reservoir porosity evolution history has been restored by the information such as core and thin section.Based on the comprehensive analysis above,the accumulation process of Yeyun 2tight sandstone gas reservoir has been verified.The study results show that Yeyun 2tight sandstone gas reservoir has mainly two-stage hydrocarbon charging history:the first stage is in Kangcun age with small amount of oil charging;the second stage is mainly charged by natural gas since Kuqaage.The cretaceous reservoir porosity of Yeyun 2tight sandstone gas reservoir dropped rapidly since Miocene and desificated in Pliocene.The porosity dropped to about 5.9%because of evolution.Based on the research of hydrocarbon charging history and reservoir porosity evolution history,three stages of hydrocarbon charging process of Yeyun 2tight sandstone gas reservoir has been verified:(1)charged with oil in Kangcun period,(2)charged with natural gas in Kuqaperiod,(3)adjusted and destroyed since Xiyu period.The research has important guiding significance for exploration of tight sandstone gas reservoir in Yeyun area of eastern Kuqa depression.

关 键 词：致密砂岩气藏 地质特征 成藏机制 野云2 库车拗陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]