贵州五峰组—龙马溪组页岩气研究进展

Research on Shale Gas of Wufeng-Longmaxi Formation, Guizhou Province

伴随着DY2井页岩气勘探开发取得成功,在贵州五峰组—龙马溪组页岩气泥页岩层系、沉积相和页岩气富集等研究方面取得一定进展,其认识主要有:泥页岩层系和沉积相的划分对页岩气勘探开发起关键性的作用;富有机质泥页岩厚度、有机碳含量随沉积相变化而变化;优质泥页岩、良好的保存条件是页岩气富集的主控因素,其中,优质泥页岩是页岩气富集高产的重要因素,良好的保存条件是控制页岩气富集高产的关键因素之一;构造影响页岩气的埋深、地层压力、保存和富集。最后提出了页岩气研究方向。

Along with a success exploration and development of shale gas in SY 2 well,we have made a certain progress on some research domains of Wufeng-Longmaxi Formation shale gas in Guizhou province,containing shales,sedimentary facies,and accumulation.Those obtained results include that(1)to divide both shales and sedimentary facies plays the key role in shale-gas exploration and development;(2)for organic-rich shale,its thickness and organic-carbon content change with sedimentary facies;(3)both high quality and better preservation condition are the main factors affecting shale-gas accumulation,in which the former is material basis for shale-gas reservoirs and the latter is basic guarantee for high yield and shale-gas accumulation;and(4)structure affects burial depth,formation pressure,preservation,and accumulation.Finally,some research directions on shale gas are also put forward.