相控砂体展布与富水规律研究——以文家坡井田延安组二段为例  

On the Distribution of Sandbody Controlled by Sedimentary Facies and Its Water Enrichment Law:A Case Study of the 2nd Member of Yan'an Formation in Wenjiapo Mine Field

作　　者：陈贤良[1,2] 冯西会 CHEN Xianliang;FENG Xihui(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China;Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Development,Xi'an University of Science and Technology,Xi'an 710054,China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Ministry of Natural Resources,Xi'an 710021,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]西安科技大学陕西省煤炭绿色开发地质保障重点实验室,陕西西安710054 [3]自然资源部煤炭资源勘查与综合利用重点实验室,陕西西安710021

出　　处：《湖南科技大学学报（自然科学版）》2024年第2期1-8,共8页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：自然资源部煤炭资源勘查与综合利用重点实验室项目资助(6000180299);陕西省科技厅一般项目(青年)资助(2023-JC-QN-0315)。

摘　　要：从沉积学角度揭示沉积相与砂体展布以及富水规律的内在联系,为矿井水害防治提供理论依据,以文家坡井田延安组二段为研究对象,利用录井、测井、地震和水文等地质资料开展相控砂体展布与富水规律研究.结果表明:延安组二段主要发育湖泊和曲流河三角洲沉积,识别出分支河道、水下分支河道、河口坝和滩坝4种主要砂体类型;砂体的空间展布受沉积相控制明显,研究区东北部的分支河道砂体和中南部的水下分支河道砂体的厚度大、粒度粗、孔隙度值高,为研究区富水异常的重点区域,在后期4号煤层开采过程中应加强矿井水害防治工作.In order to provide theoretical basis for mine water hazard prevention and control,the internal relationships between sedimentary facies,sandbody distribution and water enrichment law are revealed from sedimentology.Taking the 2^(nd) member of Yan'an formation in Wenjiapo Coal Mine Field as the research object,this paper studies the sandbody distribution which is controlled by sedimentary facies and water enrichment law by using geological data such as logging,seismic and hydrology.Results show that lacustrine and meander river dela deposits are mainly developed in the 2nd member of Yan'an formation,and four main sandbodies are identified:branch channel,subaqueous branch channel,mouth bar,and beach bar.The spatial distribution of sandbodies is obviously controlled by sedimentary facies.The branch channel sandbodies in northeast and the subaqueous branch channel sandbodies in central and southern of the study area are the key areas of water enrichment nomaly with large thickness,coarse grain size and high porosity,the prevention and control of mine water hazard should be strengthened in later mining process of 4^(#) coal seam.

关 键 词：沉积相 砂体展布 富水性 延安组二段 文家坡井田 

分 类 号：TD745[矿业工程—矿井通风与安全]