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郑庄东大井区煤层含气量主控地质因素
供稿: 付庆华;宋智华;姚磊;陶宇;樊梅荣 时间: 2018-11-19 次数:

作者:付庆华宋智华姚磊陶宇樊梅荣

作者单位:中国矿业大学(北京)地球科学与测绘工程学院;中国石油大学地球科学学院中国矿业大学资源与地球科学学院华北油田总医院廊坊矿区第一医院华北油田山西煤层气勘探开发分公司

摘要:以郑庄区块东大井区为主要研究对象,综合运用实验测试数据、煤田钻孔及煤层气井资料,并结合沉积、构造和地下水动力的原理和方法,深入分析了该区煤层含气量分布和主控地质因素。研究结果表明:研究区煤层含气量较高,总体呈自东向西逐渐增大的趋势,且主要受煤层埋藏深度、地质构造和水动力条件三个因素控制。即煤层埋深对含气量分布具有较好的控制作用,总体上含气量高值区大都位于北部深埋区域;地质构造对含气量的影响主要表现为次级构造叠加在煤层埋深影响的总体背景之上导致含气量展布复杂化;北部地区水动力条件对煤层气的运移和富集具有显著的控制作用,是影响煤层含气量展布的主要因素;而南部地区则由于埋深和断层等因素的影响,从而导致水动力条件与煤层含气量的相关性不太明显。

基金:国家科技重大专项(2011ZX05033,2011ZX05033-001,2011ZX05043-006);中国博士后科学基金资助项目(2012T50121);

关键词:煤层气;郑庄东大井区;埋藏深度;水动力;

DOI:10.16186/j.cnki.1673-9787.2015.02.011

分类号:P618.13

Abstract:It analyzed the coalbed methance ( CBM) occurrence regularity and main controlling factors of Dongda wellblock located in the east of Zhengzhuang, based on the principle and methods of sedimentology, structure, hydrodynamics and a comprehensive analysis of the experiment data, coal field, and CBM well data. It is confirmed that the CBM content is relatively high in this area with the tendency of gradual increase from east to west, and is mainly controlled by the coal seam buried depth, geological structures, and hydrodynamic conditions. The CBM content improves with the increase of coal seam buried depth. Geological structures complicate the distribution of CBM content on the basis of coal seam buried depth. The hydrodynamic condition, which has significant impacts on CBM migration and accumulation, is the main factor that affects gas content distribution in the northern area. But there is not a good correlation between hydrodynamic condition and gas content in the southern area due to the factors of buried depth and faults.

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