鄂东气田韩城区块煤层气富集区预测研究  

Study on Prediction of High-Yield Coalbed Methane Enrichment Zones in Hancheng Block,Eastern Ordos Basin

作　　者：张雷曌 王洁 刘之的 ZHANG Leizhao;WANG Jie;LIU Zhidi(School of Earth Science and Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065;Shaanxi Key Lab of Petroleum Accumulation Geology,Xi’an,Shaanxi 710065)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065

出　　处：《中国煤炭地质》2025年第3期7-15,共9页Coal Geology of China

基　　金：陕西省重点研发计划(2019GY-140)。

摘　　要：煤层气富集区的精准预测直接关系到井位部署和开发方案有效制定。以影响煤层气富集的地质因素入手,从地质构造控气作用、埋深和上覆地层厚度、沉积环境、煤层厚度、煤岩显微组分、煤变质作用、孔隙结构和地层压力八个方面研究对煤层气富集的影响;简要介绍了研究区常用的煤层气选取评价体系之后,从物质基础、吸附性能及地质条件三方面优选了厚度、镜质组、灰分、吸附饱和度、地解比、储层压力、构造条件及埋深等作为高产富集区的评价指标,利用多层次模糊评价方法对其进行富集区优选。研究结果表明,研究区发育两个富集区,分别为韩试13-韩试10-11韩11韩8-03井区;韩-4韩6宜18-20宜14-18井区。The accurate prediction of CBM-enriched areas is directly related to the deployment of wells and the effective formulation of development programs.This paper starts with the geological factors affecting CBM enrichment,and study the influence on CBM enrichment from eight aspects,namely,geological tectonic gas control,burial depth and thickness of overburden strata,depositional environment,thickness of coal beds,microcomposition of coal rocks,coal metamorphism,pore structure and stratum pressure;Following a brief introduction to the evaluation system for coalbed methane(CBM)selection,key evaluation indicators including coal thickness,vitrinite content,ash content,adsorption saturation,desorption pressure ratio,reservoir pressure,tectonic conditions,and burial depth were selected based on material basis,adsorption capacity,and geological conditions.Enrichment zones were optimized using a multi-level fuzzy comprehensive evaluation method.The results show that two rich zones are developed in the study area,which are the well zones of Han-13-Han-10-11 Han-11 Han-8-03 and Han-4 Han-6 Yi-18-20 Yi-14-18,respectively.

关 键 词：煤层气 富集区预测 韩城区块 

分 类 号：P618.13[天文地球—矿床学]