中国页岩气资源前景与战略地位

随着页岩气开采技术进步和勘探投入条件的改善，页岩气的开采活动将进一步繁荣和快速扩展。在介绍国内外页岩气资源量的基础上，分析了中国页岩气资源勘探开发前景以及页岩气资源的战略地位。研究表明：从我国油气总体发展的战略角度，积极寻找天然气后备资源已是当务之急；我国地质历史时期广泛发育的富含有机质的页岩地层具有优越的页岩气形成与富集条件，资源潜力巨大，勘探开发前景广阔，必将成为新的天然气勘探开发重要领域。建议加大页岩气资源的研究力度和勘探投入，形成我国的页岩气资源储备和勘探开发特色技术；我国南方的古生界下组合泥页岩、北方中生界泥页岩等层系具有较好的页岩气勘探前景，建议通过老井复查优选有利井段进行试气和试采，以点带面，开创页岩气勘探开发新局面

A preliminary study on accumulation mechanism and enrichment pattern of shale gas

The organic rich shale formations are abundant in China, thus the prospects of shale gas exploration and production are bright. Analyses of the features of gas shale reservoirs and study on the accumulation mechanism and enrichment patterns of shale gas can provide a theoretical basis for assessment and recovery of shale gas resources in China. Gas shale reservoirs are regional continuous unconventional gas accumulations. The major conditions for the formation of gas shale reservoirs include relatively thick shale layers, high organic content, evolutionary stage over gas window, well developed natural fractures, and occurring at the structural low or center of the basin. The main characteristics of shale gas pooling are indigenous generation and accumulation, continuous charging and accumulation, without migration or very short migration. Net thickness, organic content, matrix porosity and natural fractures are the key factors for shale gas enrichment.