黔北绥页1井牛蹄塘组页岩气地质特征及资源潜力分析

黔北地区位于上扬子地台区,断裂构造发育。该地区下寒武统牛蹄塘组海相沉积发育,以陆棚沉积为主,尤以深水陆棚沉积对页岩气形成有利。目标层位牛蹄塘组绥页1井资料分析的结果表明: 牛蹄塘组有利潜质页岩主要位于该组下部,有机质丰度高、成熟度高、微裂隙发育、含气性好,页岩气的保存条件好,牛蹄塘组上段成为保存页岩气的良好盖层。牛蹄塘组页岩气地质特征分析表明,牛蹄塘组页岩气资源潜力较大。

Geological characteristics and resource potential of shale gas from well Suiye 1 in the Niutitang Formation,northern Guizhou

The fault structure and the Lower Cambrian Niutitang Formation are widely distributed in northern Guizhou of the upper Yangtze platform. The Niutitang Formation is a set of marine sedimentary and is mainly composed of shelf deposit, especially deep water shelf deposit which is favorable for the formation of shale gas. Information from well Suiye 1 in the Niutitang Formation revealed that the upper deposit was a good cap rock, and the advantageous potential shale mainly located in the lower, with high organic matter abundance, high maturity, a large number of micro-fissure, high gas-bearing properties and favorable preservation condition. According to the comprehensive analysis of the shale gas geological characteristics, we proposed that the Niutitang Formation was a good prospect for shale gas exploration.