中高煤阶煤储层煤层气产出的煤岩学控制机理研究——以沁南和韩城地区为例

项目名称： 中高煤阶煤储层煤层气产出的煤岩学控制机理研究——以沁南和韩城地区为例

项目编号： No.41272175

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 汤达祯

作者单位： 中国地质大学（北京）

项目金额： 86万元

中文摘要： 煤储层煤岩组成及本构关系差异显著。目前煤岩学主控的煤储层储渗空间特征及其与产能耦合关系研究远不能满足煤层气开发需求，煤层气开发中单井配产、多层合采、层段优化、排采制度的建立等仍然处于探索阶段，阐明煤岩制约下的储层有效孔渗空间发育特征、层内（间）本构关系变化及煤层气开发过程储层物性响应成为亟待探索的科学问题。本项目将以沁南、韩城中、高煤阶煤储层为对象，重点研究：1、在煤储层宏观-微观煤岩分层刻画基础上，揭示煤储层物性显现特征及非均质性发育演化机理；2、从煤体本构关系，厘定气-水-固三相介质相互作用特点，建立煤岩组构与可动流体空间、有效孔渗空间配置关系；3、将煤相控制的储层条件、煤化过程储层物性演化与煤层气开发过程储层物性响应结合，揭示层内（间）矛盾表现方式与作用机制。通过研究提供适配的层内-层间、宏观-微观和初始-动态煤岩描述理论和方法，为有效规避和化解储层改造及排采过程储层非均质性矛盾提供

中文关键词： 煤岩类型；非均质性；煤层气产出；控制机理；中高煤阶煤储层

英文摘要： There were significant differences on the petrological composition and constitutive relation of coal reservoirs. So far, the research about the storage-permeable spaces characteristics of coal reservoirs and its coupling relationship with CBM production which are dominated by coal petrology is far from reaching the technology requirements of CBM development. During the CBM exploitation, the single well proration, commingling production, perforated intervals optimization, production system establishment are still at exploring stage. Clarifying the storage-permeable spaces characteristics controlled by coal petrology, the constitutive relation variation in internal or interlayer, and the reservoir physical properties response in CBM exploring process have become scientific problems and are urgent to be explored. Focusing on the middle-high rank coal reservoirs in the Qinnan and Hancheng areas, the research is devised to develop in following aspects: 1. Reveal the appearing characteristics of coal reservoir physical properties and the developing and evolving mechanism of their heterogeneity based on the depiction of macroscopic-microcosmic layers, collate the three-phase medium interaction characteristics of gas-liquid-solidity; 3. Combine the reservoir conditions controlled by coal facies, the reservoir physical p

英文关键词： coal macrolithotype；heterogeneity；coalbed methane production；control mechanism；middle-high rank coal reservoir