MOE Key Lab of Coal Bed Methane Resources and Reservoir Formation Process School of Resources and Earth
Science, China University of Mining & Technology

多煤层区有利区优选包括平面区段优选和垂向层段优选2个方面,针对现有煤层气评价体系难以适应多煤层区多层合采开发模式的不足,基于前期研究成果及目标区客观实际,提出了针对多煤层区的“基于地质模型的分层分区”平面优选方法和基于叠置含气系统理论的“主地质参数权重优选+数值模拟产能最优化”垂向优选方法。研究表明,地质建模和叠置含气系统理论是区别于单一煤层区煤层气开发优选评价的2个重要理论基础。同时,多煤层区煤层气开发优选研究重点应集中在煤储层参数反演技术及精细化描述、优选体系影响因素及主控因素研究、优选体系评价方法差异性分析及地质建模与数值模拟软件的应用4个方面。

The favorable area optimization of the multi seams area would include the plane section optimization and the vertical layer section optimization.Accordin g to the insufficiency that the available coalbed methane evaluation system was hard to adapt many features existed in the multi seams combined mining and developm ent mode of the multi seams area, based on the previous study results and objective reality of the target area, the paper provided the plan optimized method of"the slici ng subarea based on the geological model" according to the multi seams area and the vertical optimized method of"the weights optimization of the major geological para meters + the optimization of the numerical simulation capacity' "based on the theory of the overlay gas bearing system. The study showed that the geological modeling a nd the overlay gas bearing system theory would be the two important theoretical bases to distinguish the optimized evaluation of the coalbed methane development in a single seam area. Meanwhile, the optimized study focused on the coalbed methane development in the multi seams area should concentrate the parameter inversion te chnology of the coal reservoir and the fine description, the influence factors of the optimized system and the main controlled factor study, the difference analysis on the evaluation method of the optimized system and the geological modeling as well as the application of the numerical simulation software.