Comparison of reservoir characteristics between continental shale from faulted basin and marine shale under high-over mature stage: Taking Shahezi Formation in Xujiaweizi faulted basin and Longmaxi Formation in Sichuan Basin as an example

ZHAO Renwen; XIAO Dianshi; LU Shuangfang; ZHOU Nengwu

doi:10.13809/j.cnki.cn32-1825/te.2023.01.006

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Comparison of reservoir characteristics between continental shale from faulted basin and marine shale under high-over mature stage: Taking Shahezi Formation in Xujiaweizi faulted basin and Longmaxi Formation in Sichuan Basin as an example

更新时间：2025-12-05

- Comparison of reservoir characteristics between continental shale from faulted basin and marine shale under high-over mature stage: Taking Shahezi Formation in Xujiaweizi faulted basin and Longmaxi Formation in Sichuan Basin as an example
- Petroleum Reservoir Evaluation and Development Issue 1, Pages: 52-63+99(2023)
- 作者机构：
  
  1. 中国石油大学（华东）地球科学与技术学院，山东青岛 266580中国石油大学（华东）深层油气重点实验室,山东,青岛,266580
  2. 中国石油大学（华东）深层油气重点实验室,山东,青岛,266580
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2023.01.006
  CLC： P618.13
- Published：2023
- 稿件说明：
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ZHAO Renwen, XIAO Dianshi, LU Shuangfang, et al. Comparison of reservoir characteristics between continental shale from faulted basin and marine shale under high-over mature stage: Taking Shahezi Formation in Xujiaweizi faulted basin and Longmaxi Formation in Sichuan Basin as an example[J]. Petroleum Reservoir Evaluation and Development, 2023, (1): 52-63+99.
DOI：

ZHAO Renwen, XIAO Dianshi, LU Shuangfang, et al. Comparison of reservoir characteristics between continental shale from faulted basin and marine shale under high-over mature stage: Taking Shahezi Formation in Xujiaweizi faulted basin and Longmaxi Formation in Sichuan Basin as an example[J]. Petroleum Reservoir Evaluation and Development, 2023, (1): 52-63+99. DOI： 10.13809/j.cnki.cn32-1825/te.2023.01.006.

摘要

我国陆相断陷盆地含气页岩发育广泛，以往主要作为气源岩研究，对其储集性及影响因素的研究较少，亟须开展相应研究来明确陆相断陷盆地页岩储层发育主控因素。选取松辽盆地徐家围子断陷沙河子组与四川盆地龙马溪组页岩，利用有机地化、全岩分析、扫描电镜、低温氮气吸附和核磁共振等实验，对比研究高—过熟陆相断陷盆地和海相含气页岩储层特征差异并探讨主控因素。研究表明：沙河子组页岩形成环境多样，有机质类型以Ⅲ型（腐殖型）为主，黏土矿物含量高，胶结石英发育，黏土相关孔和石英粒间孔为主要孔隙类型，比表面积小但孔径大，储层发育受压实作用、黏土矿物转化和煤层发育的控制；龙马溪组页岩形成于陆棚环境，有机质类型以I型（腐泥型）为主，有机质丰度高，生物成因石英含量高，有机孔和黏土相关孔为主要孔隙类型，有机质类型和成熟度主控孔隙发育。整体上，沙河子组页岩储层发育条件稍差于龙马溪组，但平原沼泽微相页岩紧邻煤层发育，自生胶结石英发育、伊蒙混层比例高，储层有机质丰度高、可压性好、孔体积和比表面积较大、孔隙发育较好，可作为潜在有利目标开展进一步评价研究。

Abstract

Gas bearing shale is widely developed in continental faulted basins in China. In the past

it was mainly studied as the gas source rock

and there was little research on its reservoir and influencing factors. It is urgent to carry out corresponding researches to clarify the main controlling factors of shale reservoir development in continental faulted basins. For the researches

the shale of Shahezi Formation in Xujiaweizi fault depression of Songliao Basin and Longmaxi Formation in Sichuan Basin are selected

and the difference of reservoir characteristics between high over mature continental fault depression basin and marine gas shale is compared and studied by the experiments such as organic geochemistry

whole rock analysis

scanning electron microscope

low-temperature nitrogen adsorption and nuclear magnetic resonance. The research shows that the shale formation environment of Shahezi Formation is diverse

the organic matter type is mainly type Ⅲ

the clay mineral content is high

the cemented quartz is developed

the clay related pores and quartz intergranular pores are the main pore types

the specific surface area is small but the pore diameter is large

and the reservoir development is controlled by compaction

clay mineral transformation and coal seam development; Longmaxi Formation shale was formed in shelf environment. The type of organic matter is mainly type Ⅰ

with high abundance of organic matter and high content of biogenic quartz. Organic pores and clay related pores are the main pore types

and the type and maturity of organic matter mainly control the development of pores. On the whole

the shale reservoir development conditions of Shahezi Formation are slightly worse than those of Longmaxi Formation

but the plain swamp microfacies shale is developed close to the coal seam

the authigenic cemented quartz is developed

the proportion of Yimeng mixed layer is high

the reservoir has high organic matter abundance

good compressibility

large pore volume and specific surface area and good porosity development

which can be used as a potential favorable target for further evaluation and research.

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