Oil & Gas Geology ›› 2022, Vol. 43 ›› Issue (5): 1127-1140.doi: 10.11743/ogg20220510
• Petroleum Geology • Previous Articles Next Articles
Qianwen Li1(), Zhongbao Liu1, Feiran Chen2, Guangxiang Liu1, Dianwei Zhang1, Peng Li1, Pengwei Wang1
Received:
2021-12-09
Revised:
2022-07-12
Online:
2022-10-01
Published:
2022-09-02
CLC Number:
Qianwen Li, Zhongbao Liu, Feiran Chen, Guangxiang Liu, Dianwei Zhang, Peng Li, Pengwei Wang. Lithofacies types and reservoir characteristics of Jurassic shale in the Sichuan Basin revealed by the Da’anzhai Member, Well Y2, Yuanba area[J]. Oil & Gas Geology, 2022, 43(5): 1127-1140.
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Table 1
Characteristics of different lithofacies types of J1da2, Well Y2, Yuanba area"
取样深度/m | 岩相类型 | 岩心特征 | 微观特征 | TOC/% | 主要矿物含量/% | 矿物结构与沉积构造 |
---|---|---|---|---|---|---|
3 909.44 | 中-高碳粘土质页岩相 (A1型) | 2.16 | 粘土矿物:50.0 石英+长石:41.2 碳酸盐矿物:6.9 | 灰黑色,泥质结构为主,页理发育,少许条带富集,黑色矿物呈斑点状、弯曲短细条状密集分布 | ||
3 914.03 | 低-中碳粘土质页岩相 (A2型) | 0.68 | 粘土矿物:55.8 石英+长石:6.6 碳酸盐矿物:0.7 | 深灰色,泥质结构为主,针状白云母定向分布其中,碎屑颗粒以粉砂为主,不均匀分布介壳类颗粒 | ||
3 885.00 | 中碳含介壳页岩相 (B1型) | 1.56 | 粘土矿物:48.9 石英+长石:44.4 碳酸盐矿物:1.2 | 灰黑色,以粘土矿物为主,局部浸染黑色有机质,零星分布少许介壳状、拉长状等颗粒,主要由方解石组成 | ||
3 888.74 | 低-中碳介壳灰质页岩相(B2型) | 1.06 | 粘土矿物:44.4 石英+长石:40.7 碳酸盐矿物:11.2 | 深灰色,以粘土矿物为主,偶见黑色有机质呈团粒状零星分布,不均匀分布似腕足状、介壳状颗粒,长轴定向明显 | ||
3 901.54 | 低-中碳含灰质介壳页岩相(B3型) | 0.98 | 粘土矿物:47.3 石英+长石:47.1 碳酸盐矿物:3.1 | 深灰色,主要成分为粘土矿物,零星分布似介壳、腕足颗粒,部分颗粒边缘环绕分布碎屑颗粒 | ||
3 907.44 | 低-中碳粉砂质页岩相 (C1型) | 1.18 | 粘土矿物:46.9 石英+长石:45.4 碳酸盐矿物:6.0 | 深灰色,主要成分为粘土矿物,黑色矿物不均匀分布,可能为炭屑,碎屑颗粒以粉砂为主,不均匀星散分布 |
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