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
陈贤良 1冯西会2
作者信息
- 1. 西安科技大学 地质与环境学院,陕西 西安 710054;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
- 2. 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
- 折叠
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.
Abstract
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 2ndmember 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 delta 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Key words
sedimentary facies/sandbody distribution/water-enrichment/the 2nd member of Yan'an formation/Wenjiapo Coal Mine Field引用本文复制引用
基金项目
自然资源部煤炭资源勘查与综合利用重点实验室项目(6000180299)
陕西省科技厅青年一般项目(2023-JC-QN-0315)
出版年
2024
NETL
NSTL
万方数据