文献类型：期刊文献

中文题名：黔北正安地区五峰组—龙马溪组页岩气地质特征及有利区预测

英文题名：Geological characteristics and favorable areas prediction of shale gas in Wufeng-Longmaxi Formation in Zheng’an area of Northern Guizhou

作者：贺永忠 向坤鹏 安亚运 易成兴 杨忠琴 于宁

第一作者：贺永忠

机构：[1]贵州省地质调查院,贵阳550081;[2]贵州理工学院,贵阳550003

第一机构：贵州省地质调查院,贵阳550081

年份：2020

卷号：7

期号：3

起止页码：21-29

中文期刊名：中国地质调查

外文期刊名：Geological Survey of China

基金：中国地质调查局“黔北道真向斜1∶5万页岩气地质调查(编号:12120115101601)”;贵州省科学技术基金“黔北地区寒武系牛蹄塘组页岩气成藏条件及关键控制因素研究(编号:黔科合JZ字[2015]2005号)”;贵州省科学技术厅“贵州省地质调查院院士工作站(编号:黔科合平台人才[2018]5626)”;“黔北地区石牛栏组岩相古地理与页岩气有利储集相带研究(编号:黔地矿科合[2019]24)”项目联合资助。

语种：中文

中文关键词：正安地区;五峰组—龙马溪组;有机地球化学特征;含气性;有利区预测

外文关键词：Zheng’an area;Wufeng-Longmaxi Formation;organic geochemical characteristics;gas-bearing property;favorable areas prediction

摘要：为明确黔北正安地区上奥陶统五峰组至下志留统龙马溪组的页岩气地质特征,充分应用页岩气地质调查、重磁电、二维地震、地质调查井及测试分析等工作方法,开展黔北正安地区1∶5万页岩气基础地质调查,对五峰组至龙马溪组富有机质页岩的分布、沉积环境、有机地球化学、岩石矿物、储集性能及含气性等特征进行分析研究,结果表明研究区五峰组—龙马溪组富有机质页岩为深水陆棚相沉积,主要分布有安场向斜、斑竹向斜和泥高向斜,厚度14.5~55 m,埋深0~3200 m;有机碳(TOC)含量1.0%~4.0%,有机质镜质体反射率(Ro)为1.82%~2.23%,有机质类型以Ⅰ型干酪根为主;岩石主要由石英、长石和黏土矿物组成,脆性矿物含量高,一般大于50%;孔隙度为2.03%~3.89%,渗透率为0.35×10-5~1.86×10-5μm2,表现为低孔、特低渗的特征;最高含气量为2.88 m^3/t,显示出较好的含气性特征。综合分析和评价圈出3个页岩气聚集有利区,分别为安场区块、斑竹区块和泥高区块,这为研究区页岩气进一步勘探开发指明了方向。
In order to determine the shale gas geological characteristics of Wufeng Formation in upper Ordovician and Longmaxi Formation in Lower Silurian of Zheng'an area in Northern Guizhou,the authors used geology survey,gravity,magnetic,two dimensional seismic,geological well and test analysis methods to carry out 1∶50000 shale gas basic geology survey.The distribution,depositional environment,organic geochemical,mineral composition,reservoir properties and hydrocarbon content and other characteristics of Wufeng-Longmaxi Formation rich organic shale were obtained.The results show that the rich organic shale belongs to deep water continental shelf facies,mainly distributed in Anchang,Banzhu and Nigao syncline,with a thickness of 14.5-55 m and burial depth of 0-3200 m.The TOC content is between 1.0%and 4.0%,and the vitrinite reflectance(Ro)is between 1.82%and 2.23%,with the organic matter type mainly I kerogen.The rocks are mainly composed of quartz,feldspar and clay minerals.The brittle mineral content is high,generally more than 50%.The porosity is generally between 2.03%and 3.89%,and the permeability is generally between 0.35×10-5μm2 and 1.86×10-5μm2,showing the characteristics of low porosity and low permeability.The highest gas content is 2.88m^3/t,showing good gas content characteristics.Three favorable target areas for the shale gas in Zheng’an area were identified through comprehensive analysis and evaluation optimization,that is Anchang,Banzhu and Nigao block respectively,which provides exploration direction for shale gas exploration and development in the study area.