黔南地区麻页1井寒武系牛蹄塘组页岩特征及页岩气勘探前景
发布时间：2018-10-12 15:33
【摘要】：黔南地区寒武系牛蹄塘组厚度大,底板地层封闭性相对较好,可分为两段,其中第一段为半深水—深水陆棚相黑色碳质页岩夹粉砂岩,厚度为99m,是主要的页岩气目标层段;第二段为浅水陆棚相灰色粉砂岩、页岩,厚165m。针对黔南地区仅有的一口牛蹄塘组页岩气调查井——麻江地区麻页1井取样分析,显示该井牛蹄塘组第一段页岩TOC在0.39%~5.35%之间,镜质组反射率(Ro)在1.56%~2.48%之间,平均为2.06%,干酪根显微组分以腐泥无定形体为主,为Ⅰ型干酪根;岩石主要由石英和黏土矿物组成,脆性矿物含量较高,一般大于50%,孔隙度在1.13%~1.88%之间,渗透率一般为0.0011~0.0082m D,表现为低孔、低渗的特征;总含气量最高可达1.13m3/t。该调查井初步揭示黔南地区寒武系牛蹄塘组页岩地质条件较好,具有进一步深入开展页岩气调查勘探的潜力。
[Abstract]:The Cambrian Niutetang formation in the south of Guizhou has a large thickness and relatively good bottom sealing, which can be divided into two sections. The first section is the black carbonaceous shale siltstone with a thickness of 99m, which is the main target formation of shale gas. The second stage is shallow-water shelf gray siltstone, shale, 165m thick. According to the sampling and analysis of the only shale gas survey well in Niutetang formation in southern Guizhou, Mafe 1 well in Majiang area, the results show that the shale TOC of the first member of Niutetang formation is between 0.39% and 5.35%, and the vitrinite reflectance (Ro) is between 1.56% and 2.48%. The average value is 2.06. The maceral component of kerogen is mainly saproot, which is type 鈪，
本文编号：2266661
[Abstract]:The Cambrian Niutetang formation in the south of Guizhou has a large thickness and relatively good bottom sealing, which can be divided into two sections. The first section is the black carbonaceous shale siltstone with a thickness of 99m, which is the main target formation of shale gas. The second stage is shallow-water shelf gray siltstone, shale, 165m thick. According to the sampling and analysis of the only shale gas survey well in Niutetang formation in southern Guizhou, Mafe 1 well in Majiang area, the results show that the shale TOC of the first member of Niutetang formation is between 0.39% and 5.35%, and the vitrinite reflectance (Ro) is between 1.56% and 2.48%. The average value is 2.06. The maceral component of kerogen is mainly saproot, which is type 鈪，
本文编号：2266661
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