黔北东部地区页岩气富集主控因素分析——以YH1井为例

林瑞钦; 何清波; 王奕松; 陈祎

林瑞钦,何清波,王奕松,陈祎.黔北东部地区页岩气富集主控因素分析——以YH1井为例[J].贵州地质,2025,42(4):466-478

黔北东部地区页岩气富集主控因素分析——以YH1井为例

Analysis on Main Controlling Factors for Shale Gas Enrichment in East Northern Guizhou——A Case Study of Well YH1

投稿时间：2025-08-15

DOI：

中文关键词: 黔北东部页岩气五峰-龙马溪组含气性富集主控因素

英文关键词:East Northern Guizhou Shale gas Wufeng-Longmaxi formation Gas-bearing properties Main controlling factors for enrichment

基金项目:贵州省科技支撑计划项目“黔北褶皱区页岩气差异性评价关键技术研究”(编号:黔科合支撑〔2023〕一般370)资助

作者	单位
林瑞钦	自然资源部复杂构造区非常规天然气评价与开发重点实验室,贵州贵阳550000 贵州省油气勘查开发工程研究院,贵州贵阳550000
何清波	自然资源部复杂构造区非常规天然气评价与开发重点实验室,贵州贵阳550000 贵州省油气勘查开发工程研究院,贵州贵阳550000
王奕松	自然资源部复杂构造区非常规天然气评价与开发重点实验室,贵州贵阳550000 贵州省油气勘查开发工程研究院,贵州贵阳550000
陈祎	自然资源部复杂构造区非常规天然气评价与开发重点实验室,贵州贵阳550000 贵州省油气勘查开发工程研究院,贵州贵阳550000

摘要点击次数: 871

全文下载次数: 281

中文摘要:

黔北地区五峰-龙马溪组页岩气资源丰富，但东部地区勘探研究程度较低，为深入研究其页岩气富集主控因素，启发区域页岩气的勘探及相关研究，以黔北东部地区的YH1井五峰-龙马溪组富有机质页岩为目标，开展了TOC、物性、矿物组分等与页岩含气性关系分析。研究显示，烃源岩热演化程度、孔隙物性对页岩气富集的影响较小，而区域页岩气富集的主控因素在不同TOC含量的层段上有明显的区别:在TOC含量较低的层段，矿物组分对其有十分明显的控制作用，脆性矿物越高、碳酸盐矿物和黏土矿物越低，含气性越好；在TOC含量较高的层段，其含气性在一定程度上受控于有机质丰度和孔隙结构，受矿物成分影响较小。古生产力和氧化还原条件共同控制了有机质的富集，区域古生产力整体偏低，且龙马溪组长期处于偏氧化环境，导致优质烃源岩厚度有限。后期燕山期和喜山期强烈的构造抬升与改造，破坏了页岩气的保存条件，也是影响YH1井最终含气性的关键原因。

英文摘要:

The Wufeng-Longmaxi formation in northern Guizhou exhibits abundant shale gas resources，yet exploration and research in its eastern region remain limitedTo investigate the main controlling factors for shale gas enrichment and inspire regional exploration and related studies，organic-rich shales from the Wufeng-Longmaxi formation in well YH1 in east Northern Guizhou were analyzedRelationships between TOC(total organic carbon)，physical properties，mineral composition，and gas-bearing properties were examinedThe results indicate that the thermal maturity of source rocks and pore physical properties have minimal influence on shale gas enrichmentIn contrast，the main controlling factors for regional shale gas enrichment vary significantly across intervals with different TOC contents:In low-TOC intervals，mineral composition exerts a pronounced control，where higher brittle mineral content and lower carbonate/clay mineral content correlate with better gas-bearing propertiesIn high-TOC intervals，gas-bearing properties are primarily governed by organic matter abundance and pore structure，with minimal influence from mineral compositionPaleoproductivity and redox conditions collectively governed organic matter enrichmentThe overall paleoproductivity in the region was low，and the Longmaxi formation remained in a moderately oxidized environment for a long period，resulting in limited thickness of high-quality source rocksIntense tectonic uplift and transformation during the Late Yanshanian and Himalayan periods destroyed the shale gas preservation conditions，which is also a key factor leading to the poor gas-bearing properties of well YH1

查看全文查看/发表评论下载PDF阅读器