【摘要】：黔南地區(qū)寒武系牛蹄塘組厚度大,底板地層封閉性相對較好,可分為兩段,其中第一段為半深水—深水陸棚相黑色碳質(zhì)頁巖夾粉砂巖,厚度為99m,是主要的頁巖氣目標(biāo)層段;第二段為淺水陸棚相灰色粉砂巖、頁巖,厚165m。針對黔南地區(qū)僅有的一口牛蹄塘組頁巖氣調(diào)查井——麻江地區(qū)麻頁1井取樣分析,顯示該井牛蹄塘組第一段頁巖TOC在0.39%~5.35%之間,鏡質(zhì)組反射率(Ro)在1.56%~2.48%之間,平均為2.06%,干酪根顯微組分以腐泥無定形體為主,為Ⅰ型干酪根;巖石主要由石英和黏土礦物組成,脆性礦物含量較高,一般大于50%,孔隙度在1.13%~1.88%之間,滲透率一般為0.0011~0.0082m D,表現(xiàn)為低孔、低滲的特征;總含氣量最高可達(dá)1.13m3/t。該調(diào)查井初步揭示黔南地區(qū)寒武系牛蹄塘組頁巖地質(zhì)條件較好,具有進(jìn)一步深入開展頁巖氣調(diào)查勘探的潛力。
[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，

本文編號：2266661