页岩气的开发

 页岩气作为一种资源量巨大的非常规天然气，具有“自生自储，原地成藏”的特征，其储层致密、开采难度大、气井投产后“初产高，递减快，长期低产”的特点明显。综述了全球页岩气的储量、开发技术及意义，介绍了目前中国页岩气的开发现状。中国页岩气资源丰富，地质资源量134.42×10¹² m³，技术可采资源量25.08×10¹² m³，“水平井+体积压裂+工厂化作业”是页岩气成功开发的基本模式，目前在长宁-威远、昭通和涪陵3个南方海相页岩气示范区实现了初步规模开发，已经具备了年产气97亿m³的生产能力。分析表明，合理高效地开发页岩气，对于缓解中国能源供需矛盾、调整能源消费结构、增强国际天然气定价影响力及促进区域经济发展均具有重要意义。

A summary of shale gas development

Being a unconventional resource, shale gas is usually generated and preserved in-situ, and its ultra-low permeability results in huge difficulty for commercial development. A typical shale gas production profile would start with high level initial production, followed by a sharp decline and a long-term of low level production. The global shale gas resource volume, the development technology and the significance of shale gas development are summarized, and the development status of shale gas industry in China is introduced as well. The shale gas geological resource of China is estimated as 134.42×10¹² m³, and the technically recoverable resource is 25.08×10¹² m³. Engineering experiences have proved that "horizontal well+volume fracturing+factory operation" is a successful and effective mode of shale gas development. China has so far preliminarily developed three marine shale gas reservoirs, i.e.,Changning-Weiyuan, Zhaotong and Fuling, and the total productivity is 97×10¹² m³/a. The efficient development of shale gas will help China relieve the imbalance between energy supply and demand, adjust the energy consumption structure, strengthen the influence on international pricing power of natural gas, and boost regional economic development.