江汉盆地潜江凹陷盐间页岩油储层不同岩相微观储集特征——以古近系潜江组三段4亚段10韵律为例

徐二社; 陶国亮; 李志明; 吴世强; 张文涛; 饶丹

doi:10.11781/sysydz202002193

江汉盆地潜江凹陷盐间页岩油储层不同岩相微观储集特征——以古近系潜江组三段4亚段10韵律为例

doi: 10.11781/sysydz202002193

徐二社^{1, 2, 3, 4,},
陶国亮^{1, 2, 3, 4},
李志明^{1, 2, 3, 4},
吴世强⁵,
张文涛^{1, 2, 3, 4},
饶丹^{1, 2, 3, 4}

1.
中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126
2.
页岩油气富集机理与有效开发国家重点实验室, 江苏无锡 214126
3.
国家能源页岩油研发中心, 江苏无锡 214126
4.
中国石油化工集团公司油气成藏重点实验室, 江苏无锡 214126
5.
中国石化江汉油田分公司勘探开发研究院, 武汉 430223

基金项目:

国家科技重大专项 2017ZX05049001-002

国家科技重大专项 2017ZX05036-002-003

国家重点基础研究发展计划（973计划）项目 2014CB239102

详细信息

作者简介:
徐二社(1981-), 男, 硕士, 高级工程师, 从事非常规油气地质研究。E-mail: xues.syky@sinopec.com

中图分类号: TE122.23
计量
- 文章访问数: 727
- HTML全文浏览量: 154
- PDF下载量: 133
- 被引次数: 0
出版历程
- 收稿日期: 2019-09-26
- 修回日期: 2020-02-12
- 刊出日期: 2020-03-28

Microscopic reservoir characteristics of different lithofacies from inter-salt shale oil reservoir in Qianjiang Sag, Jianghan Basin: a case study of Paleogene Eq₃⁴-10 rhythm

XU Ershe^{1, 2, 3, 4
,},
TAO Guoliang^{1, 2, 3, 4},
LI Zhiming^{1, 2, 3, 4},
WU Shiqiang⁵,
ZHANG Wentao^{1, 2, 3, 4},
RAO Dan^{1, 2, 3, 4}

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu 214126, China
3.
State Energy Center for Shale Oil Research and Development, Wuxi, Jiangsu 214126, China
4.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China
5.
Research Institute of Exploration and Development, SINOPEC Jianghan Oilfield Branch Company, Wuhan, Hubei 430223, China

摘要

摘要: 通过岩石薄片鉴定、扫描电镜、压汞—液氮吸附联合测定及微米CT三维重构等实验手段，对江汉盆地潜江凹陷潜江组页岩油储层的矿物组成、岩相组合、孔缝类型、孔隙结构及孔隙发育规律进行研究。盐间古近系潜江组三段4亚段10韵律页岩油储层主要岩相有纹层状泥质白云岩相、纹层状云（灰）质泥岩相和钙芒硝充填纹层状云质泥岩相；储集空间主要包括层间缝、晶间孔、晶间溶孔等。盐间页岩油储层孔隙的发育主要受岩性、岩相控制，钙芒硝充填纹层状云质泥岩相—纹层状云（灰）质泥岩相—纹层状泥质白云岩相孔隙发育程度依次增强。纹层状泥质白云岩相孔隙中宏孔最为发育，孔隙连通性最优，含油性最佳，为盐间页岩油储层中的优势岩相，是盐间页岩油最有利的勘探目标。
- 储集特征 /
- 岩相组合 /
- 盐间 /
- 页岩油 /
- 潜江组 /
- 潜江凹陷 /
- 江汉盆地
Abstract: The mineral composition, lithofacies association, pore-fracture type, pore structure and pore development control of the Qianjiang Formation shale oil reservoir in the Qianjiang Sag of the Jianghan Basin were studied using thin section petrography, scanning electron microscopy, mercury injection-liquid nitrogen adsorption and 3D reconstruction of micro-CT. The main lithofacies of Eq₃⁴-10 rhythm (the tenth rhythm in the fourth submember of the third member of the Qiangjiang Formation) are laminated argillaceous dolomite, laminated dolomitic (calcareous) mudstone and mirabilite filled laminated dolomitic mudstone. The main reservoir porosity includes interlayer fractures, intergranular pores and intergranular solution pores. The pore development of inter-salt shale oil reservoir is mainly controlled by lithology and lithofacies, and the pore development degree of mirabilite filled laminated dolomitic mudstone, laminated dolomitic (calcareous) mudstone and laminated[JP3]argillaceous dolomite increase accordingly. Macro-pores are the most developed porosity in the laminated argillaceous dolomite facies, with the best pore connectivity and oil-bearing properties, and is the dominant lithofacies in the inter-salt shale oil reservoir and the most favorable exploration target.
- reservoir characteristics /
- lithofacies association /
- inter-salt /
- shale oil /
- Qianjiang Formation /
- Qianjiang Sag /
- Jianghan Basin

HTML全文

图 1 江汉盆地潜江凹陷区域构造、沉积相及取样位置^[14]

Figure 1. Regional structures, sedimentary facies and sample locations of Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 2 江汉盆地潜江凹陷W99井Eq₃⁴-10韵律综合柱状图

Figure 2. Comprehensive stratigraphic chart of Eq₃⁴-10 rhythm in well W99, Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 3 江汉盆地潜江凹陷W99井Eq₃⁴-10韵律样品岩相分类

Figure 3. Classification diagram of Eq₃⁴-10 rhythm samples in well W99, Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 4 江汉盆地潜江凹陷潜江组盐间地层微裂缝、层理缝发育概况

Figure 4. Development of micro-fractures and bedding fractures of inter-salt strata in Qianjiang Formation, Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 5 江汉盆地潜江凹陷盐间潜江组页岩不同岩相主要的孔隙类型

Figure 5. Main pore types of different lithofacies of inter-salt shale in Qianjiang Formation, Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 6 江汉盆地潜江凹陷盐间潜江组页岩不同岩相全孔径分布特征

宏孔(直径大于50 nm)为压汞法；微孔—介孔(0~50 nm)为吸附法

Figure 6. Pore diameter distribution characteristics of different lithofacies of inter-salt shale in Qianjiang Formation, Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 7 江汉盆地潜江凹陷W99井Eq₃⁴-10韵律不同岩相微米CT三维重构图

Figure 7. 3D reconstruction of different lithofacies with micro CT from Eq₃⁴-10 rhythm in well W99, Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

表 1 江汉盆地潜江凹陷W99井Eq₃⁴-10韵律不同岩相微米CT分析计算结果

Table 1. Micron CT analysis for different lithologies from Eq₃⁴-10 rhythm in well W99, Qianjiang Sag, Jianghan Basin

岩性	深度/m	主体孔隙直径/μm	主体喉道直径/μm	平均喉道长度/μm	CT孔隙度/%
纹层状泥质白云岩相	1 676.88	100~400	1~4	8.49	13.30
纹层状灰质泥岩相	1 680.42	4~40	0.8~4	7.99	3.58
纹层状云质泥岩相	1 678.26	4~40	2~4	7.42	3.46
钙芒硝充填云质泥岩相	1 684.04	4~20	0.8~2	7.88	3.20

下载: 导出CSV

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