页岩气及其勘探研究意义

与传统意义上的泥页岩裂缝气并不完全相同,现代概念的页岩气是主体上以吸附和游离状态同时赋存于具有生烃能力泥岩及页岩等地层中的天然气聚集,具有自生自储、吸附成藏、隐蔽聚集等地质特点。美国的页岩气勘探取得巨大成功,是投入工业性勘探开发的三大非常规天然气类型之一,目前已形成了区域性页岩气勘探开发局面。中国的页岩气研究正在起步,许多盆地及研究区具有页岩气成藏的地质条件。与美国东部地区页岩气成藏地质条件进行初步对比,中国南方具有有利的页岩气发育条件,开展页岩气研究具有重要意义。

Shale Gas and Its Significance for Exploration

Unlike the conventional concept of hydrocarbon in fractures,the current definition of shale gas is the absorbed and free gas accumulation that exists in mudstone and/or shale layers with autogenic gas.Gas accumulation in shale is of many particular geological characteristics,some of which are self-generation and self-reservation,absorption accumulation,subtle aggregation,and so on.Exploration and exploitation for shale gas have achieved great success in USA in which shale gas has become one of the three economic types of unconventional gas with pervasive exploration value and profitable industrial exploitation.Many basins and regions in China are of favorable geological settings for shale gas,and the research on shale gas develops quickly.In contrast with the geological condition in the eastern USA,the southern China has the favorable geology conditions for shale gas exploration.It is important and significant to research and explore shale gas in China.