玛湖凹陷西北缘侏罗系三工河组油藏特征  

Reservoir Characteristics of Jurassic Sangonghe Formation in Northwest Margin of Mahu Depression

作　　者：邱争科[1] 吴让彬[1] 李武[1] 于超[1] 王超[1] Qiu Zhengke;Wu Rangbin;Li Wu;Yu Chao;Wang Chao(No.2 Oil Production Plant,Karamay,Xinjiang,834008,China)

机构地区：[1]中国石油新疆油田分公司采油二厂,新疆克拉玛依834000

出　　处：《新疆地质》2020年第3期378-382,共5页Xinjiang Geology

基　　金：准噶尔盆地油藏富集规律及勘探技术研究与应用(2017E-0401)资助。

摘　　要：近年来玛湖凹陷勘探研究多集中在深层,浅层油气藏勘探尚属空白。侏罗系三工河组储层薄,分布面积广,物性好,在实施探井恢复试油过程中,三工河组获得重大突破。据地震、钻井、岩心观察及分析化验等测试资料,对油藏特征分析认为:凹陷发育NE向、NW向两大物源体系,有利相带为辫状河三角洲前缘;储集层主要为灰色细砂岩,储集空间以剩余粒间孔为主;油源为玛湖生烃凹陷二叠系风城组烃源岩,该烃源岩有机质丰度及成熟度高,排烃期为三叠纪和中晚侏罗纪—白垩纪,该区三工河组成藏属于后者。区内大侏罗沟走滑断裂及伴生断裂有助于油气的纵向疏导及调整,渗透性薄砂体与断裂配置形成整个三工河组油气运聚的立体网络。因此,区内三工河组为断层-岩性油藏。In recent years,the exploration of Mahu depression is concentrated in the deep layer,while the exploration of shallow oil and gas reservoir is still blank.The reservoir of Sangonghe Formation in Jurassic is thin,widely distributed and has good physical properties.In the process of recovery and oil testing,Sangonghe formation has made a significant breakthrough.According to the test data of earthquake,drilling,core observation and analysis,the reservoir characteristics are analyzed.It is considered that the sag develops two major source systems of NE and NW,and the favorable facies belt is the braided river delta front;the reservoir is mainly gray fine sandstone,and the reservoir space is mainly the residual intergranular pores;the oil source is the Permian Fengcheng Formation source rock of Mahu hydrocarbon generation sag,which is organic The hydrocarbon expulsion period is Triassic and middle Late Jurassic Cretaceous,and Sangonghe reservoir belongs to the latter.The large Jurassic channel strike slip fault and associated fault in the area are conducive to the vertical distribution and adjustment of oil and gas.The permeable thin sand body and fault configuration form a three-dimensional network of oil and gas migration and accumulation of the whole Sangonghe formation.Therefore,Sangonghe Formation in the area is a fault lithologic reservoir.

关 键 词：准噶尔盆地 西北缘 玛湖凹陷 侏罗系三工河组 油藏特征 

分 类 号：P618.130.1[天文地球—矿床学]