页岩气主要富集因素与核心区选择及评价

Shale gas enrichment factors and the selection and evaluation of the core area

影响页岩气规模开发的因素很多,最核心的因素是首先要通过建立地质评价标准,选出页岩气核心区。核心区的确定关系到在页岩气勘探初期,是否能找准页岩气最富集的目标,选择最有利地区进行勘探,突破出气关,进而实现大规模经济开发。从页岩气成藏特征、页岩气富集因素分析入手,重点探讨我国富有机质页岩的丰度、成熟度、脆性矿物含量、含气性以及盖层等关键参数及其作用。借鉴北美页岩气勘探开发和研究成果,结合我国页岩气勘探开发和研究新进展,初步建立我国页岩气核心区地质评价标准,并优选出我国南方海相页岩气的核心区,指出四川盆地南部是我国最现实的页岩气开发区。

Many factors affect the size of the shale gas development. First and foremost factor is how to establish the geological evaluation standards and select the core area of shale gas. In the early stage of exploration the optimized shale gas core area makes it possible to identify the target and to select the most favorable region for ex- ploration. The main purpose is to find shale gas and achieve economic development. Based on the analysis of shale gas reservoir characteristics and the enrichment factors we discuss the organic-rich shale maturity, mineral content, gas content and conservation parameters in China. Learn from the U. S. shale gas exploration and development and research, combined with the new progress of China＇ s shale gas exploration and development and research, we establish china＇ s first shale gas core area parameter system and value standards. Finally,. we optimize some favorable areas and core areas of the marine shale in southern China and point out Southern Siehuan Basin is the most realistic area for shale gas development.