Oil & Gas Geology ›› 2021, Vol. 42 ›› Issue (3): 627-638, 701.doi: 10.11743/ogg20210309
• Petroleum Geology • Previous Articles Next Articles
Jinmin Song1(), Yaxiong Zhang2, Kewei Yin1,3, Shugen Liu1,4, Zongyu Chen5, Zhiwu Li1, Yanhong Tian1,6, Wei Sun1, Ying Liu3, Xin Jin1, Lingli Zhao1
Received:
2018-10-10
Online:
2021-06-28
Published:
2021-06-23
CLC Number:
Jinmin Song, Yaxiong Zhang, Kewei Yin, Shugen Liu, Zongyu Chen, Zhiwu Li, Yanhong Tian, Wei Sun, Ying Liu, Xin Jin, Lingli Zhao. Characteristics and geological significance of mixed sediments in the Lower Cambrian Longwangmiao Formation, central Sichuan Basin[J]. Oil & Gas Geology, 2021, 42(3): 627-638, 701.
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Table 1
Mixed sediments comparison of the Lower Cambrian Longwangmiao Formation between the central and northern Sichuan Basin"
对比项 | 川中地区 | 川北地区 |
石英含量/% | 5~40 | 15~90 |
石英粒径/mm | < 0.10 | 0.10~0.25 |
石英产状 | 沿缝合线分布;分散于基质中;与碳酸盐颗粒相接触;充填于碳酸盐颗粒间;碳酸盐颗粒内部 | 沿缝合线分布;分散于基质中;与碳酸盐颗粒相接触;碳酸盐颗粒间;碳酸盐颗粒内部;碎屑岩组分 |
混积强度 | 1,2级为主,最高3级 | 1,2级为主,最高4级 |
混积岩性 | 混积型碳酸盐岩 | 混积型碳酸盐岩、混积型碎屑岩、高度混积岩 |
混积层系 | 碳酸盐岩-混积岩层系、混积岩层系 | 陆源碎屑岩-碳酸盐岩层系、碳酸盐岩-混积岩层系、混积岩层系 |
混积类型 | 渐变式、复合式Ⅱ | 渐变式、复合式Ⅱ |
混积发育段 | 高石梯为全井段、磨溪中下段 | 龙王庙组全段 |
风暴作用强度 | 高石梯最强、磨溪地区次之 | 弱 |
与物源区距离 | 远 | 近 |
储层厚度/m | 30~70 | 15~50 |
颗地比/% | 38~85 | 15~35 |
面孔率% | 2~15 | 2~9 |
储集空间 | 粒间溶孔、粒内溶孔、晶间溶孔 | 粒间溶孔、晶间孔 |
沥青含量/% | 1~15 | 0.5~2.0 |
沥青产状 | 弥散状 | 斑点状 |
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