细粒沉积岩岩相组合特征及评价——以苏北盆地高邮凹陷阜宁组二段深层为例

doi:10.13809/j.cnki.cn32-1825/te.2024386

油气藏评价与开发 ›› 2026, Vol. 16 ›› Issue (1): 153-161.doi: 10.13809/j.cnki.cn32-1825/te.2024386

细粒沉积岩岩相组合特征及评价——以苏北盆地高邮凹陷阜宁组二段深层为例

杨保良¹^,²(), 于雯泉¹, 段宏亮¹, 付茜¹, 孙雅雄¹^,³(), 仇永峰¹, 杨艳¹, 刘世丽¹^,³, 周进峰¹, 傅强²

^1.中国石化江苏油田分公司，江苏扬州 225009
^2.同济大学海洋与地球科学学院，上海 200092
^3.页岩油气富集机理与高效开发全国重点实验室，北京 102206

收稿日期:2024-09-18 发布日期:2026-01-06 出版日期:2026-01-26
通讯作者: 孙雅雄（1993—），男，博士，副研究员，从事非常规油气地质理论与评价研究。地址：江苏省扬州市文汇西路1号江苏油田分公司，邮政编码：225009。E-mail： sunyaxiong2015@163.com
作者简介:杨保良（1988—），男，博士，助理研究员，从事非常规细粒沉积与页岩油气储层评价研究。地址：江苏省扬州市文汇西路1号江苏油田分公司，邮政编码：225009。E-mail： yangbl564@163.com
基金资助:
国家科技重大专项“渤海湾超级盆地油气富集规律与新领域勘探技术”(2024ZD1400100);中国石化科技开发部项目“内陆断陷湖盆断块型页岩油勘探开发技术”(P23189);中国石化科技开发部项目“东部断陷盆地页岩储层差异演化机制及建模”(P24207);中国石化江苏油田分公司科研课题“苏北盆地阜二段细粒混合沉积岩展布特征及分布规律”(JD23002);中国石化江苏油田分公司科研课题“高邮凹陷阜四段页岩油形成条件及资源潜力”(JS24002);江苏省卓越博士后计划“湖相细粒沉积岩混合沉积特征及其对页岩油气甜点发育的影响”(2024ZB364)

Characteristics and evaluation of lithofacies combination of fine-grained sedimentary rocks: A case study of deep second member of Funing Formation in Gaoyou Sag, Subei Basin

YANG Baoliang¹^,²(), YU Wenquan¹, DUAN Hongliang¹, FU Qian¹, SUN Yaxiong¹^,³(), QIU Yongfeng¹, YANG Yan¹, LIU Shili¹^,³, ZHOU Jinfeng¹, FU Qiang²

^1.Sinopec Jiangsu Oilfield Company, Yangzhou, Jiangsu 225009, China
^2.School of Ocean and Earth Science, Tongji University, Shanghai 200092, China
^3.State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China

Received:2024-09-18 Online:2026-01-06 Published:2026-01-26

摘要/Abstract

摘要：

陆相湖盆泥页岩具有岩相类型多样、垂向叠置复杂的特征，在岩相类型划分基础上开展岩相组合类型划分和有利组合优选，对于落实页岩油“甜点”层、“甜点”区具有重要意义。高邮凹陷阜宁组二段（以下简称阜二段）是苏北盆地页岩油勘探的重点区带和层系，其岩相类型单层厚度薄且纵向变化频繁，对于岩相组合类型划分及评价研究尚处于初步阶段。以高邮凹陷阜二段深层HY7井为研究对象，通过岩心观察、薄片鉴定、全岩X衍射分析、主微量元素分析等手段，在岩相类型识别和纵向沉积环境演化规律分析基础上，开展岩相组合类型划分与发育规律研究，并结合不同岩相组合类型的评价参数对比，优选有利组合类型。研究结果表明：HY7井阜二段以混积类岩相和长英质类岩相为主，以层状或纹层状长英质-灰质或白云质混积岩最为发育。阜二段沉积环境纵向上表现为气候早干晚湿、水深早浅晚深、盐度早高晚低、物源供给早高晚低、生产力早低晚高，可划分为6个演化阶段。结合各演化阶段内沉积旋回升降变化、不同岩相类型的垂向叠置关系、厚度占比等，划分出7种主要岩相组合类型。其中，层状或纹层状长英质-黏土质混积岩、长英质-灰质或白云质混积岩互层组合为最有利组合类型；层状或纹层状碳酸盐岩、长英质-灰质或白云质混积岩占主导的组合可作为较好的储集层。

关键词: 细粒沉积岩, 岩相组合, 苏北盆地, 高邮凹陷, 阜宁组二段

Abstract:

Shale in continental lacustrine basins has the characteristics of diverse lithofacies types and complex vertical superposition. On the basis of lithofacies type classification, the classification of lithofacies combination types and the selection of favorable combination are of great significance for identifying the “sweet spot” layers and areas of shale oil. The second member of the Funing Formation in Gaoyou Sag is a key area and stratigraphic unit for shale oil exploration in Subei Basin. Its lithofacies types have thin single layers and frequent vertical variations. Therefore, the research on the classification and evaluation of lithofacies combination types is still in the preliminary stage. Taking the well HY7 in the deep second member of the Funing Formation in Gaoyou Sag as the research object, methods including core observation, thin section identification, whole-rock X-ray diffraction analysis, and major and trace element analysis were employed. Based on lithofacies type identification and vertical sedimentary environment evolution analysis, the lithofacies combination type classification and development patterns were investigated. By comparing the evaluation parameters of different lithofacies combination types, the favorable combination types were optimized and selected. The results showed that the well HY7 in the second member of Funing Formation was mainly composed of mixed rock facies and felsic rock facies, with layered or laminated felsic-calcareous/dolomitic mixed rocks being the most developed. The sedimentary environment of the second member of the Funing Formation vertically showed early dry-late wet climate, early shallow-late deep water depth, early high-late low salinity, early high-late low provenance supply, and early low-late high productivity, which could be divided into six evolution stages. Considering sedimentary cycle changes in each evolution stage, the vertical superposition relationships of different lithofacies types, and their thickness proportions, seven main lithofacies combination types were identified. Among them, the interbedded combination of layered or laminated felsic-argillaceous mixed rocks and felsic-calcareous/dolomitic mixed rocks had the highest thickness proportion and was the most favorable combination type. The lithofacies assemblages dominated by layered/laminated carbonate rocks and felsic-calcareous/dolomitic mixed rocks could serve as good reservoir layers.

Key words: fine-grained sedimentary rock, lithofacies combination, Subei Basin, Gaoyou Sag, second member of Funing Formation

中图分类号:

TE122

杨保良,于雯泉,段宏亮, 等. 细粒沉积岩岩相组合特征及评价——以苏北盆地高邮凹陷阜宁组二段深层为例[J]. 油气藏评价与开发, 2026, 16(1): 153-161.

YANG Baoliang,YU Wenquan,DUAN Hongliang, et al. Characteristics and evaluation of lithofacies combination of fine-grained sedimentary rocks: A case study of deep second member of Funing Formation in Gaoyou Sag, Subei Basin[J]. Petroleum Reservoir Evaluation and Development, 2026, 16(1): 153-161.

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岩相组合代号	岩相类型	发育层段	厚度比/%	ω（TOC）/%	S₁/ (mg/g)	S₁+S₂/ (mg/g)	含油饱和指数/(mg/g)	孔隙度/%	力学脆性指数
Ⅰ	块状黏土质长英细粒岩、长英质-黏土质混积岩	Ⅰ 亚段	11.66	1.58	0.85	4.59	54.59	3.71	30.75
Ⅱ	块状或层状长英质-灰质或白云质混积岩夹薄层长英质-黏土质混积岩	Ⅱ、Ⅳ亚段	16.84	1.14	0.99	3.71	111.13	2.88	55.56
Ⅲ	层状碳酸盐岩、长英质-灰质或白云质混积岩互层	Ⅲ亚段	4.90	0.69	1.07	2.88	150.43	3.32	60.84
Ⅳ	层状或纹层状的黏土质长英细粒岩或长英细砂岩、长英质-黏土质混积岩、长英质-灰质或白云质的混积岩，灰质或白云质英细粒岩互层	Ⅴ亚段	14.70	0.51	0.66	1.46	121.86	2.57	45.45
Ⅴ	层状或纹层状长英质-黏土质混积岩、长英质-灰质或白云质混积岩互层	Ⅳ亚段	6.92	1.19	1.01	4.31	101.54	4.00	52.60
Ⅵ	层状或纹层状长英质-灰质或白云质混积岩、灰质或白云质长英细粒岩夹薄层长英细粒岩、长英质-黏土质混积岩	Ⅳ、Ⅴ亚段	30.22	0.70	1.12	2.35	140.19	3.01	54.67
Ⅶ	层状或纹层状的黏土质长英细粒岩或长英细粒岩夹薄层长英质-灰质或白云质混积岩、长英质-黏土质混积岩	Ⅴ亚段	14.77	0.85	1.09	3.02	136.36	3.07	47.82

细粒沉积岩岩相组合特征及评价——以苏北盆地高邮凹陷阜宁组二段深层为例

Characteristics and evaluation of lithofacies combination of fine-grained sedimentary rocks: A case study of deep second member of Funing Formation in Gaoyou Sag, Subei Basin

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