天然气水合物研究的新进展

天然气水合物的调查评价刚刚起步，有关其成藏机理等许多问题有待解决。最近国际上关于天然气水合物资源和成藏机理的研究有新的进展，现根据大量的实际调查资料重新估算了天然气水合物资源量，并认为过去报道的资源量过高；海底天然气水合物的聚集与烃流体的垂向运移有关，泥火山底辟构造控制了海底天然气水合物的聚集和分布；天然气水合物的开采方式与常规油气藏开发不同，宜采用简单加热法、抑制剂法和减压法开采；近期应主要进行海底及浅层的天然气水合物勘探。

New Progresses in Natural Gas Hydrate Researches

The investigation and evaluation of natural gas hydrate are just at the beginning of the work, and thus many problems such as pooling mechanism of the gas hydrate still remain to be solved. Recently, studies on gas hydrate in the world have made new progresses, and resources of the hydrate have been re estimated on the basis of amounts of actual survey data. As a result of the re estimation, previously calculated resources are considered too much more than the real resources. The accumulation of natural gas hydrate beneath the seafloor is related with the vertical migration of hydrocarbon fluid, and diapir structure of mud volcano has controlled the accumulation and distribution of the hydrate. Mining of the gas hydrate is much different from that of conventional oil and gas pools, and simple heating and depressuring methods are suitable. At present, we should give our work to explorations of seafloor and shallow gas hydrate.