四川盆地及其周缘典型地区龙潭组页岩岩相划分对比及特征
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何燚,唐玄,单衍胜,刘光祥,谢皇长,马子杰
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Lithofacies division and comparison and characteristics of Longtan Formation shale in typical areas of Sichuan Basin and its surrounding
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Yi HE,Xuan TANG,Yan-sheng SHAN,Guang-xiang LIU,Huang-chang XIE,Zi-jie MA
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表2 M1井和DC1井龙潭组矿物组分
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Table 2 Mineral composition of Longtan Formation in Wells M1 and DC1
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| 井号 | 编号 | 井深/m | 岩性 | 黏土/% | 石英/% | 钾长石/% | 斜长石/% | 方解石/% | 白云石/% | 黄铁矿/% | 菱铁矿/% | 硬石膏/% |
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| M1井 | M2 | 4 941.5 | 灰色灰质页岩 | 36 | 16 | / | 3 | 11 | 29 | 3 | 1 | 1 | | M5 | 4 944.4 | 灰黑色炭质页岩 | 21 | 45 | / | 3 | 20 | 6 | 4 | 1 | / | | M9 | 4 949.2 | 灰黑色炭质页岩 | 38 | 43 | / | 4 | 6 | 4 | 3 | / | 2 | | M11 | 4 951.2 | 灰黑色炭质页岩 | 25 | 59 | / | 2 | 8 | 2 | 4 | / | / | | M15 | 4 955.7 | 灰色泥质页岩 | 22 | 11 | / | 1 | 4 | 59 | 3 | / | / | | M16 | 4 956.8 | 灰黑色页岩 | 65 | 8 | / | 4 | 1 | 14 | 6 | 1 | 1 | | M19 | 4 959.4 | 灰黑色页岩 | 55 | 20 | / | / | 1 | 2 | 19 | 3 | / | | M20 | 4 960.4 | 灰黑色页岩 | 67 | 5 | 1 | 11 | / | 4 | 12 | / | / | | M21 | 4 962.3 | 灰黑色含砂页岩 | 58 | 19 | / | 15 | / | / | 7 | / | 1 | | DC1井 | D1 | 632.6 | 灰黑色含砂页岩 | 55.3 | 29.9 | 0.9 | 2.3 | / | / | 10.3 | / | 1.3 | | D2 | 671 | 煤 | 25.3 | 74.7 | / | / | / | / | / | / | / | | D4 | 723.2 | 黑色炭质页岩 | 88.2 | 11.8 | / | / | / | / | / | / | / | | D6 | 854.1 | 灰黑色粉砂质页岩 | 41.1 | 41.9 | 0.6 | 14.2 | / | / | 2.2 | / | / | | D7 | 862.6 | 黑色炭质页岩 | 54.3 | 19.4 | 1.2 | 8.2 | / | 15.8 | 1.1 | / | / | | D8 | 891.5 | 黑色炭质页岩 | 76.6 | 15 | 2.2 | 1.9 | 3.9 | / | 0.4 | / | / | | D9 | 920.7 | 灰黑色粉砂质页岩 | 60.2 | 23 | 0.8 | 9.8 | 6.2 | / | / | / | / | | D10 | 957.8 | 黑色炭质页岩 | 87.5 | 11.9 | 0.4 | / | 0.2 | / | / | / | / |
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