摘要
临汾-洪洞区块位于山西省霍西煤田南部,石炭二叠系煤系总体上埋深在2000m以深,非常具有煤系非常规天然气成藏的可能性。通过对研究区最新勘查成果的分析,依据泥页岩、煤层、致密砂岩层地球化学、储层物性、含气性等数据分析了研究区煤系非常规天然气的赋存特征。研究表明煤及富有机质泥页岩为非常规天然气系统的烃源岩,二者有机质处于高-过成熟度阶段;致密砂岩的孔隙度最大,煤层其次,页岩孔隙度最小;在含气性方面,泥页岩含气量平均为1.17m 3/t,煤层含气量为8.50m 3/t,上石盒子组底部近200m砂岩层均显示出了较好的气测值,表明该地区煤系非常规天然气有较大的成藏潜力。
The Linfen-Hongtong block is situated in the southern part of Huoxi coalfield,Shanxi Province.As a whole,the buried depth of Permo-Carboniferous coal measures strata is 2,000m below,thus very likely to have unconventional natural gas reservoiring.Through latest exploration results from the study area,according to argillutite,coal seam,compact sandstone geochemistry,reservoir physical property and gas-bearing property data analyzed study area coal measures unconventional natural gas hosting features.The study has shown that coal and organic matter rich argillutite are unconventional natural gas source rocks.Organic matter of both is at high-over maturity stage.Porosity of compact sandstone is the largest,coal the second and shale the least.On gas-bearing property,average gas content of argillutite is 1.17m 3/t,coal 8.50m 3/t.The Shangshihezi Formation bottom near 200m sandstone has presented better gas logging values,showing coal measures in the area have larger unconventional natural gas reservoiring potential.
作者
郝少伟
Hao Shaowei(ShanxiLu’an Jinyuan Coalbed Methane Exploitation Co.Ltd.,Changzhi,Shanxi 046200)
出处
《中国煤炭地质》
2020年第2期67-73,共7页
Coal Geology of China
基金
2014年度山西省煤基重点科技攻关项目-煤层气、页岩气资源潜力综合评价及共探共采选区研究,项目编号MQ2014-02。
关键词
临汾-洪洞区块
煤系非常规天然气
非常规天然气系统
成藏潜力
Linfen-Hongtong block
coal measures unconventional natural gas
unconventional natural gas system
reservoiring potential
