页岩气与煤层气成藏特征对比与共生优选

Contrast of the Reservoir Forming Characteristic Between Shale Gas and Coalbed Methane and Symbiotic Optimization

通过对煤层气和页岩气成藏条件、成因机制、赋存机理、运移机理等诸多方面对比研究,探寻煤层气和页岩气的相似性和差异性,二者均表现为具有纳米级孔隙结构、自生自储、原地成藏、连续成藏,成因类型都包括生物成因、热成因和混合成因.同时,其储层岩性、成藏过程、保存条件等具有很大差异性.煤层气和页岩气具有密切联系,并且国内多地区出现二者共生现象,可将其作为一个系统,结合地区特征建立系统评价标准,考虑实现多目的层位共同勘探开发.

The accumulation conditions,formation mechanism and occurrence mechanism,migration mechanism, preservation conditions and many aspects coalbed methane（CBM）and shale gas were studied. The results show that CBM and shale gas has a lot of similarities,as it has nanoscale pore structure,self generation and self preservation, in-situ accumulation and continuous accumulation. Genetic types include biogenic,thermogenic and mix types. Meanwhile,the reservoir lithology,accumulation process,preservation conditions and others also have a great difference. CBM and shale gas have a close contact,and appear symbiosis between them in many domestic areas. It can be served as a system and combined with the regionalism to eatablish system evaluation standard ,considering implement multi purpose horizon of exploration and development together.