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本篇论述中、新生界煤型气的有关问题。中生界煤型气资源集中分布在北方,气源岩以侏罗纪煤系为主,以西北区资源前景最好。其中吐—哈盆地最具代表性,构造环境反转是本区煤层气形成并富集的特殊构造条件。新生界煤型气资源则集中分布于大陆架裂谷系,第三纪煤系为主力气源岩,裂谷高温构造环境是源岩热演化生烃的有利条件,而背斜—断层圈闭是最有利成藏的构造类型。崖13-1气田为本区典型代表并具自生自储的特点。
This discussion, the Cenozoic coal-related issues. The Mesozoic coal-bed gas resources are concentrated in the north, with gas source rocks dominated by Jurassic coal measures and resource prospects in the northwestern region are the best. Among them, the Tuoha Basin is the most representative and the inversion of tectonic environment is a special tectonic condition for the formation and enrichment of coalbed methane in this area. Cenozoic coal gas resources are concentrated in the continental shelf rift system, the Tertiary coal system is the main source rock, rift high temperature tectonic environment is source rock thermal evolution hydrocarbon generation favorable conditions, and anticline-fault trap is The most favorable tectonic type of accumulation. Cliff 13-1 gas field is a typical representative of this area and has its own characteristics of self-storage.