摘要
查明天然气水合物的沉积环境是研究其成藏规律的基础。以青海木里聚乎更矿区为研究对象,通过对野外露头、钻孔岩芯等资料分析的基础上,对研究区侏罗系沉积类型及沉积演化进行分析。研究结果表明研究区沉积相类型主要为辫状河相、曲流河三角洲相及湖泊相;木里地区水合物的分布赋存层位以江仓组上段为主,岩性则以较细颗粒的岩石为主,江仓组上段沉积相主要为半深湖及滨浅湖亚相,江仓组下段沉积相主要为滨浅湖-半深湖亚相,木里组下段沉积相主要是辫状河相、三角洲平原相、三角洲前缘相,木里组上段沉积相主要是滨浅湖相、浅湖亚相。
This paper provides sedimentary environment of gas hydrate for the basis of reservoirforming regularity.Under the research background on Juhugeng mine of Muli in Qinghai province,it is investigated sedimentation type and evolution of sedimentary environment.The results show that sedimentary facies types are mainly braided facies,meandering-delta facies,lacustrine facies.The upper member of the Jiangcang formation,where the gas hydrates were frequently discovered,is dominated byfine grain of rock.The sedimentation type of upper Jiangcang formation is semi-deep lake facies and shallow lake subfacies,and the lower part is shallow lake-half-deep lake subfacies.The sedimentation type of lower Jiangcang formation is braided facies,delta plain facies,delta-front facies,and the upper part is coastal shallow-lake facies and shallow lake subfacies.
出处
《中国矿业》
北大核心
2017年第S1期195-199,共5页
China Mining Magazine
基金
中国地质调查局油气资源调查中心"祁连山冻土区天然气水合物资源勘查项目"项目资助(编号:中地调油合同(2014)第153号)
