中国非常规天然气资源基础与开发技术

中国非常规天然气资源丰富，合理有效地开发可为中国经济的可持续发展提供能源保障。致密砂岩气藏远景资源量超过12×1012 m3，已经实现规模开发；煤层气勘探在高阶煤中取得突破；页岩气研究刚刚起步，四川盆地、塔里木盆地、鄂尔多斯盆地等具有良好的页岩气成藏和开发条件；在中国南海多处发现天然气水合物存在的证据。但是，由于非常规天然气地质条件具有复杂性和特殊性，现有的部分勘探开发技术适用性差、不够成熟，加之低渗透储层单井产量低等因素，严重制约了非常规天然气开发利用的步伐。因此应加强以下工作：研发不同类型致密砂岩气藏的开发技术；优选煤层气有利目标区及扩大勘探开发规模；研发适合高阶煤层气田的高效勘探开发关键技术；调查页岩气资源分布并查明成藏主控因素；开展天然气水合物资源评价。

The unconventional natural gas resources and exploitation technologies in China

The abundant unconventional natural gas resources, if exploited reasonably and efficiently, will provide stable energy supply for the sustainable development of Chinese economy. In China, the prospective reserves of condense sandstone gas resources is estimated to be more than 12 tcm and some progress has been made in its commercial production; breakthrough has been made in the high rank coal of coalbed methane exploration; the study of shale gas has just started, and good conditions have been found in the Sichuan, Tarim, and Ordos basins for both pooling and exploitation of shale gas; many evidences of methane gas hydrate have been found in the South Sea of China. However, due to the complexity and the specific characteristics of geological conditions, some technologies of exploration and exploitation can not meet the needs for the recovery or commercial production of the unconventional natural gas resources. Therefore, this paper presents some suggestions: ①to research into and develop various technologies of exploiting different types of condense sandstone gas reservoirs; ②to optimize the favorable blocks for the coalbed methane and enlarge its scale of exploration and development; ③to research into and develop high and efficient exploration and exploitation technologies for high coal rank coalbed gas fields; ④to survey the distribution of shale gas resources and identify the main controlling factors of shale gas pooling; ⑤to make assessment on methane gas hydrate resources.