纳雍补作区块煤层气成藏控因及勘探方向
Coalbed Methane Accumulation Control Factors and Exploration Direction in Nayong Buzuo Block
邓兰 1曾家瑶1
作者信息
- 1. 贵州省煤层气页岩气工程技术研究中心,贵州贵阳 550000;贵州省煤田地质局,贵州贵阳 550000
- 折叠
摘要
基于大量的煤田地质勘探资料,深入分析了研究区煤的变质程度、煤岩煤质特征、煤层顶底板封盖性、煤层埋深、构造和水文地质条件等煤层气成藏控制因素,采用体积法估算了研究区煤层气地质资源量,并进一步提出下一步勘探方向.结果表明:研究区水文地质和高致密的煤层顶底板对煤层气起到封闭控气作用;煤层埋深、煤岩煤质和煤的变质程度是造成各主采煤层含气量差异的主要因素;估算出研究区煤层气资源量为68.82×108 m3,为中型气藏,另外优选出区块1为I级甜点区,可作为研究区先期勘探开发区.
Abstract
Based on a large number of coal geological exploration data,in-depth analysis of the study area of the metamorphic degree of coal,coal,poroperm characteristics,the coal seam roof and floor block sex,coal seam buried depth,structure and hydrogeological condition such as control factors,the coalbed methane volume method is used to estimate the CBM geological resources in the study area,and further puts forward the next step prospecting direction.The results show that the hydrogeology and high density coal seam top and bottom plate in the study area play a sealing and gas control role on coalbed methane.The depth of coal seam,the quality of coal rock and the degree of coal metamorphism are the main factors that cause the difference of gas content in each main coal seam.It is estimated that the CBM resources in the study area are 68.82×108 m3,which is a medium-sized gas reservoir.In addition,block 1 is selected as a Grade I sweet spot,which can be used as a preliminary exploration development zone in the study area.
关键词
煤层气/成藏控制因素/构造/水文地质/勘探方向Key words
coal bed methane(CBM)/control factors of accumulation/structure/hydrogeology/exploration direction引用本文复制引用
基金项目
贵州省科技计划(黔科合战略找矿[2022]ZD001)
出版年
2024
NETL
NSTL
万方数据