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ID:36560759
大小:1.78 MB
页数:9页
时间:2019-05-12
《黔西地层热流体差异作用及其煤层气成藏效应》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第44卷第2期煤炭科学技术Vol.44No.22016年2月CoalScienceandTechnologyFeb.2016黔西地层热流体差异作用及其煤层气成藏效应唐淑玲,汤达祯,许浩,陶树,李松(中国地质大学(北京)煤层气国家工程中心煤储层实验室,北京100083)摘要:为了研究煤层气系统热流体偶合地质作用机制,对织金、盘县煤系热流体地质特征进行了对比,并从地层热流体活动新的视角分析了黔西煤层气富集成藏地质选择过程。研究表明:织金、盘县均存在两期区域性热流体活动,早期以钙质流体为载体,晚期以硅质流体和少量钙
2、质流体为载体,分别属于地层流体热循环作用和深源高温热流体的差异注入。热流体作用促使煤层气集中高强度生成和运移,产生密集成群管状气孔,与构造应力协同,导致煤体开裂破碎,明显影响煤的孔渗性。煤系地层中相对封闭滞留的热流体环境,是导致煤层气系统高压形成的重要因素之一。黔西北部台隆处于相对封闭滞留区,高温热流体配置条件更有利于煤层气富集成藏。关键词:热流体;地质作用机理;煤层气;富集成藏作用中图分类号:P618?11文献标志码:A文章编号:0253-2336(2016)02-0008-09Differentialef
3、fectofhydrothermalfluidinformationandaccumulationeffectofcoalbedmethaneinWestGuizhouTangShuling,TangDazhen,XuHao,TaoShu,LiSong(CoalReservoirLaboratoryofNationalCBMEngineeringCenter,ChinaUniversityofGeosciences(Beijing),Beijing100083)Abstract:Inordertodiscus
4、sthecouplinggeologicalmechanismofhydrothermalfluidincoalbedmethanesystem,thispapercomparedthegeologicalcharacterofthehydrothermalfluidbetweenZhijinandPanxianinWestGuizhou,andanalyzedthegeologicalprocessofenrich⁃mentandaccumulationofcoalbedmethanefromnewpers
5、pectiveofhydrothermalfluidactivitiesinformation?TheresultsshowedthattwostagesregionalthermalfluidactivitieshappenedintheZhijinandPanxian?Intheearlystage,thecalciumfluidwasthecarrier,butitbe⁃cametosiliceousfluidandasmallamountofcalciumfluidinthelaterstage?Th
6、eformerwastheresultofthermalcyclingeffectoffluidinformation,andthelatterwascausedbythedifferentialinjectionofdeep-sourceandhightemperaturefluid?Thehydrothermalfluidim⁃pelledcoalbedmethanetogenerateandmigrateathighintensity,alongwithproducingdenseswarmstubul
7、arpores,whichwerecoincidentwithtectonicstress?Asaresult,thecoalbodywasbrokenandtheporosityandpermeabilityofcoalwereaffectedobviously?Oneofthemostimportantfactorswhichleadtohighstressincoalbedmethanesystemwastherelativelyclosedandstrandedhydrothermalfluidenv
8、i⁃ronmentincoalmeasurestrata?PlatformupriseinthenortheastofGuizhouregionwasjustinsuchanenvironment,wherethehightempera⁃turefluidcouldprovidemorefavorableconditionsfortheenrichmentandaccumulationofcoalb
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