青海木里地区下—中侏罗统窑街组烃源岩生烃潜力分析  

Hydrocarbon Potential Analysis of Source Rock of Lower-Middle Jurassic Yaojie Formation in Muli Area,Qinghai Province

作　　者：张耀明 焦志良 Zhang Yaoming;Jiao Zhiliang(China Energy and Chemical Industry Development Construction Group Co.,Ltd.,Guiyang,Guizhou 550029;Hebei Jiatzer Surveying and Mapping Service Co.,Ltd.,Qinhuangdao,Hebei 050010)

机构地区：[1]中能化发展建设集团有限公司,贵州贵阳550029 [2]河北嘉泽测绘服务有限公司,河北秦皇岛050010

出　　处：《中国煤炭地质》2022年第10期31-36,共6页Coal Geology of China

摘　　要：木里地区的侏罗纪烃源岩出露面积大,厚度也大,具有很高的研究价值。以木里矿区下—中侏罗统窑街组为研究对象,开展烃源岩发育特征和生烃潜力分析。研究发现:(1)木里地区侏罗系烃源岩主要发育在窑街组泥岩和页岩中,在木里地区窑街组主要位于聚乎更和弧山一带。下部为河湖相夹泥炭沼泽相,岩性为灰白—灰色粗粒砂岩、粉砂岩与厚煤层互层夹泥岩、炭质页岩及煤线。(2)通过实验室内分析数据显示研究区侏罗系可作为烃源岩的泥岩及页岩中有机碳含量大于0.4;干酪根类型为Ⅰ型和Ⅱ_(1)型;热演化温度显示,侏罗系烃源岩基本处于低成熟时期。研究结果表明,研究区侏罗系中可作为烃源岩的泥岩、页岩具有一定的生烃潜力,对后期的天然气水合物研究和开发有一定指导作用。The Jurassic source rocks in Muli area have large outcrop area and a large thickness,which has high research value.In this research,the Lower-Middle Jurassic Yaojie Formation in Muli mining area is taken as the research object,the development characteristics and hydrocarbon generation potential of source rocks were analyzed.It is found:(1) The Jurassic source rocks in Muli area are mainly developed in mudstone and shale of Yaojie Formation,and Yaojie Formation in Muli area is mainly located in the area of Juhugeng and Arc Mountains.The lower part is fluvial and lacustrine facies interbedded with peat swamp facies.The lithology is grey white-grey coarse-grained sandstone,siltstone and thick coal seam interbedded with mudstone,carbonaceous shale and coal line.(2) According to the laboratory analysis data,the organic carbon content in the mudstone and shales which can be used as hydrocarbon source rock in Jurassic is greater than 0.4;The kerogen type is type I and type II_(1);The thermal evolution temperature shows that the Jurassic source rock is basically in the low maturity period.It can be concluded that the mudstone and shale that can be used as source rocks in the Jurassic in the study area have certain hydrocarbon generation potential,and have a certain guiding effect on the research and development of natural gas hydrate in the later stage.

关 键 词：下—中侏罗统 烃源岩 生烃潜力 窑街组 木里地区 

分 类 号：TE122.1[石油与天然气工程—油气勘探]