贵州省主要黑色页岩层页岩气成藏规律及找矿潜力

卢树藩; 何犇; 罗香建; 符宏斌

卢树藩,何犇,罗香建,符宏斌.贵州省主要黑色页岩层页岩气成藏规律及找矿潜力[J].贵州地质,2023,40(4):398-407

贵州省主要黑色页岩层页岩气成藏规律及找矿潜力

The Reservoir Forming Law and Prospecting Potential of Shale Gas in the Main Black Shale Layers in Guizhou Province

投稿时间：2023-08-31

DOI：

中文关键词: 贵州省页岩气主要页岩层成藏条件找矿潜力

英文关键词:Guizhou Province Shale gas Major shale layers Reservoir forming condition Prospecting potential

基金项目:中国矿产地质志·贵州卷，贵州省地矿局科研项目(2021黔地矿科合6号，2021黔地矿科合9号)；贵州省页岩气资源勘探开发战略研究项目(GZYQY2020001)。

作者	单位
卢树藩	贵州省地质调查院，贵州贵阳550081
何犇	贵州省地质调查院，贵州贵阳550081
罗香建	贵州省地质调查院，贵州贵阳550081
符宏斌	贵州省地质调查院，贵州贵阳550081

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中文摘要:

贵州发育多套黑色页岩层，其中最重要的页岩层为寒武系牛蹄塘组/渣拉沟组、奥陶系五峰组-志留系龙马溪组和石炭系打屋坝组/旧司组，前期实施了多口探井调查其页岩气资源条件，勘查结果显示不同的黑色页岩页岩气富集成藏特征有明显差异。牛蹄塘组/渣拉沟组页岩层在全省分布最广，有机质丰度最高，但热演化程度同样很高，页岩气含量偏低甚至局部地区以氮气为主，受构造破坏影响很大；五峰组—龙马溪组、打屋坝组/旧司组页岩层分布范围和有机质丰度不如牛蹄塘组/渣拉沟组，但生烃演化历程相对要短，热演化程度适中，受构造破坏影响相对较小，页岩气富集受有机质丰度、微观孔隙发育、矿物成分影响明显。三个主要页岩层中，五峰组—龙马溪组和打屋坝组/旧司组页岩气勘查显示较好，资源条件较佳，找矿潜力大，是下一步贵州页岩气勘查开发的重点层位。

英文摘要:

There are many black shale layers in Guizhou province，and the most important shale layers are the Cambrian Niutitang formation/Zhalagou formation，Ordovician Wufeng formation-Silurian Longmaxi formation，Carboniferous Dawuba formation/Jiusi formationThe wells have been implemented to investigate their shale gas resource conditionsThe exploration showed significant differences in the characteristics of different black shale gas rich reservoirsThe Niutitang formation/Zhalagou formation shale is the most widely distributed in the Guizhou province，with the highest organic matter abundanceHowever，the degree of thermal evolution is also high，with low shale gas content and even partial areas dominated by nitrogen gasThe enrichment characteristics are complex and greatly affected by structural damageThe distribution range and organic matter abundance of the Wufeng formation-Longmaxi formation，Dawuba formation/Jiusi formation shale formations are not as good as those of the Cambrian Niutitang formation/Zhalagou formationHowever，the hydrocarbon generation evolution process is relatively short，the degree of thermal evolution is moderate，and the impact of structural damage is relatively smallShale gas enrichment is significantly influenced by organic matter abundance，micro pore development，and mineral compositionAmong the three main shale formations，the shale gas exploration of the Wufeng formation-Longmaxi formation and the dawuba formation/Jiusi formation are good，with good resource conditions and great exploration potentialThey are the key horizons for further shale gas exploration and development in Guizhou Province

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