鄂西渝东地区东岳庙段陆相页岩气富集主控因素分析

The Main Factors Controlling the Continental Shale Gas Accumulation in Dongyuemiao Section of Western Hubei-Eastern Chongqing Area

鄂西渝东地区东岳庙段以浅湖-半深湖沉积为主,发育厚层灰黑色页岩,横向分布稳定。页岩具有机碳含量高、热演化程度适中、储集空间类型丰富、物性较好、测录井响应明显等特征。综合研究认为,区内页岩气富集主要受有机质丰度、热演化程度及储层物性等关键因素控制,西北部乐福店-临溪场为陆相页岩气勘探的有利区域。

The Dongyuemiao Section in Western Hubei-Southern Chongqing Area was mainly of shallow lake,semi-deep lake deposit with the development of thick gray-black shale that displays a laterally stable distribution.The shale was characterized by high TOC,moderate thermal evolution,variety of reservoir space types,good physical property and obvious logging response.Synthetic study shows that the enrichment of shale gas in the studied area is controlled by organic abundance,thermal evolution degree and reservoir property.Lefudian-Linxichang Area in west is a beneficial are of continental shale gas exploration.