控制平顶山矿区煤层气赋存的构造与热演化史

在一定条件下,构造演化和有机质热演化史,控制着煤层气的生成、富集和保存特征.在其它控气地质因素相似的前提下,有效生气阶段和有效阶段生气率控制着煤层含气量的高低.通过分析平顶山矿区构造特征及演化史,恢复了主要煤层上覆地层原始厚度,对煤层热演化史进行了模拟,进而确定了煤层的有效生气阶段.

The structure of coalbed methane possession and metamorphil process in Pingdingshan Mining Area

Under givenconditions, structual evolution and metamorphic process of organic matter controlgeneration, enrichment and preservation of coalbed methane. With similar geology factorsof controlling gas, the content of coalbed methane is controlled by effective stage of gasgeneration and the rate of gas generation in this stage. Through the analyses of thestructual features and evoluation process, we determine the original thickness of strataover main coalbeds, and study metamorphic process of coalbed to ascertain effective stageof gas generation.