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通过地质条件与地球化学综合分析,从页岩沉积环境、生烃条件、储集条件及保存条件等方面进行研究,认为下寒武统牛蹄塘组页岩具备较好的页岩气成藏条件,深水陆棚相是页岩气发育的最有利相带。页岩厚度和有机碳含量是影响黔北地区页岩气藏形成的主要因素,并据此进行有利区优选,划定出石阡-瓮安有利区和酉阳-思南有利区。
Based on the comprehensive analysis of geological conditions and geochemistry, this paper studies the shale sedimentary environment, hydrocarbon generation conditions, reservoir conditions and preservation conditions. It is concluded that the Lower Cambrian shales in the Niutitang Formation have good shale gas accumulation Conditions, the deep-shelf phase shale gas development is the most favorable facies belt. Shale thickness and organic carbon content are the main factors influencing the formation of shale gas reservoirs in northern Guizhou. According to the results, the favorable area is selected and the favorable areas of Shiqian-Weng’an and Youyang-Sinan favorable areas are delineated.