煤储层开发动态地质评价理论与技术进展

The project team took the Qinshui Basin, Ordos Basin, etc. as the research objects and achieved four theoretical understandings, including the geological control model of high-yield CBM well areas, the dynamic laws and mathematical models of physical properties of coal reservoirs, the multi-layer superimposed CBM systems, and the numerical description of the desorption stage of CBM development; formed four evaluation technologies, such as the characterization of coalbed water and pores by low-field nuclear magnetic resonance, the comprehensive geological evaluation of favorable CBM construction and production areas, the geological design of progressive drainage and production of CBM in multi-layer superimposed gas-bearing systems, and the dynamic geological evaluation of coal reservoir development; developed three sets of equipment, such as the physical simulation test system for multi-coal seam and multi-field coupled CBM mining, the fluid parameter detector for CBM vertical wells, and the ultra-low frequency electromagnetic detector for natural sources of coalbed gas content, and initially formed the framework of the geological support technology system for CBM development suitable for the geological conditions of the research area, providing a reference for meeting the needs of large-scale CBM development.

项目组以沁水盆地、鄂尔多斯盆地等为研究对象ꎬ取得了煤层气高产井区地质控制模式、煤储层物性动态规律与数学模型、多层叠置含煤层气系统、煤层气开发解吸阶段数值描述等４ 项理论认识ꎻ形成了煤层水及孔隙低场核磁共振表征、煤层气有利建产区地质综合评价、多层叠置含气系统煤层气递进排采地质设计、煤储层开发地质动态评价等４ 项评价技术ꎻ研发了多煤层多场耦合煤层气开采物理模拟试验系统、煤层气直井流体参数探测仪、煤层含气量天然源超低频电磁探测仪等３ 套装备ꎬ初步形成了适合于研究区地质条件的煤层气开发地质保障技术体系框架ꎬ为满足煤层气大规模开发需求提供了参考ꎮ