鲁西南地区石炭-二叠系煤系页岩气资源潜力分析  

Permo-Carboniferous Coal Measures Shale Gas Resource Potential Analysis in Southwestern Shandong Area

作　　者：李翠芳 Li Cuifang(Shandong Provincial Coal Geological Planning,Exploration and Research Institute,Jinan,Shandong 250104)

机构地区：[1]山东省煤田地质规划勘察研究院,济南250104

出　　处：《中国煤炭地质》2020年第10期15-21,共7页Coal Geology of China

基　　金：山东省地质勘查专项基金项目(鲁勘字(2013)5号)。

摘　　要：对鲁西南地区石炭-二叠系泥页岩进行研究,明确了泥页岩的有机质丰度、有机质类型和有机质成熟度,并进行了页岩气资源潜力预测。得出以下几点结论:识别出了潮坪-潟湖、台地-潟湖、三角洲和曲流河4种沉积体系;暗色泥岩主要发育于潮坪、潟湖、泥炭沼泽等沉积环境中,且利于页岩气的成藏;泥页岩厚度为30~140m,埋深为500~3500m;得出区内有机质类型以Ⅱ2、Ⅲ型为主,Ⅱ1型少量分布;区内有机质含量多集中在0.75%~3%,有机质丰度处于低—中等;有机质成熟度大于0.5%,处于低成熟—成熟阶段。区内泥页岩多为低孔-低渗储层,石炭-二叠系至少进入了晚期成岩阶段;鲁西南地区的济宁潜凹陷、成武潜凹陷-单县煤田-金乡煤田之间的为页岩气有利发育区,菏泽潜凸起、汶上-宁阳潜凹陷、兖州潜凸起、鱼台潜凹陷-滕州潜凹陷、黄岗潜凹陷为页岩气发育的远景区。研究成果对今后鲁西地区页岩气的勘探开发具有一定的指导意义。The study on Permo-Carboniferous argillutite in southwestern Shandong area has cleared up organic matter abundance,type and maturity of argillutite and carried out shale gas resource potential prediction. Following conclusions have been worked out: the study has identified tidal flat-lagoon,platform-lagoon,delta and meandering river four sedimentary systems. Dark mudstone has mainly developed in tidal flat,lagoon,peat bog etc sedimentary environments,and beneficial to shale gas reservoiring. Argillutite thickness is between 30 ~ 140 m,buried depth between 500 ~ 3 500 m;organic matter mainly belongs to Ⅱ2,Ⅲ types and a few type Ⅱ1;organic matter contents mainly 0. 75% ~ 3% with abundance low to medium,maturity >0. 5%,thus in low maturity to maturity. Argillutite reservoirs have mostly low porosity and low permeability. The Carboniferous and Permian systems in the area have at least entered into later diagenetic stage. Southwestern Shandong area Jining buried depression,Chengwu depression-Shanxian coalfield-Jinxiang coalfield between are beneficial shale gas developed areas;while Heze buried bulge,Wenshang-Ningyang buried depression,Yanzhou buried bulge,Yutai buried depression-Tengzhou buried depression,Huanggang buried depression are shale gas prospect areas. The study has certain guiding significance to shale gas exploration and exploitation in western Shandong area henceforth.

关 键 词：石炭-二叠系 页岩气 暗色泥岩 潜力预测 鲁西南地区 

分 类 号：P618.3[天文地球—矿床学]