Characteristics of sequence-palaeogeography and coal-accumulating models of the Permo-Carboniferous coal-bearing series in eastern Henan Province

doi:10.7605/gdlxb.2026.034

Journal of Palaeogeography（Chinese Edition） ›› 2026, Vol. 28 ›› Issue (2): 695-707. doi: 10.7605/gdlxb.2026.034

• LITHOFACIES PALAEOGEOGRAPHY AND SEDIMENTOLOGY • Previous Articles Next Articles

Characteristics of sequence-palaeogeography and coal-accumulating models of the Permo-Carboniferous coal-bearing series in eastern Henan Province

WU Huiyong¹(), XU Liji², ZHU Shaojun¹, ZHANG Mengge², XU Jun¹, SHI Xiaowei¹, SHAO Longyi²()

1 Henan Academy of Geology,Zhengzhou 450001,China
2 College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China

Received:2025-06-18 Revised:2025-07-20 Online:2026-04-01 Published:2026-04-07
Contact: SHAO Longyi,born in 1964,is a professor and doctoral supervisor of College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),with main research interests in sedimentology,sequence stratigraphy and coal geology. E-mail: ShaoL@cumtb.edu.cn.
About author:
WU Huiyong,born in 1983,is a senior engineer. He is mainly engaged in coal and coal-gas exploration and development research work. E-mail: 286677899@qq.com.
Supported by:
research projects of Henan Academy of Geology including “Research and Demonstration of Optimal Selection Methods for Beneficial Areas of Deep Coal-Measures-Gas in Eastern Henan Province”(2023-331-XM022-KT03); “Research on Reservoir Properties and Stereoscopic Fracturing Simulation of Deep Coal-Measures-Gas in the Southern North China Basin”(2024-352-XM025-KT05)

豫东地区石炭—二叠纪含煤岩系层序—古地理与聚煤规律^*

吴会永¹(), 许礼纪², 朱绍军¹, 张孟鸽², 许军¹, 史小卫¹, 邵龙义²()

1 河南省地质研究院,河南郑州 450001
2 中国矿业大学(北京)地球科学与测绘工程学院,北京 100083

通讯作者: 邵龙义,男,1964年生,中国矿业大学(北京)地球科学与测绘工程学院教授,博士生导师,主要从事沉积学、层序地层学及煤田地质学教学及研究工作。E-mail: ShaoL@cumtb.edu.cn。
作者简介:
吴会永,男,1983年生,硕士,高级工程师,从事煤及煤系气勘查开发研究工作。E-mail: 286677899@qq.com。
基金资助:
* 河南省地质研究院院管科研项目“豫东地区深部煤系气有利区优选方法研究及示范”(2023-331-XM022-KT03); “南华北盆地深部煤系气储层物性特征及立体压裂模拟研究”(2024-352-XM025-KT05)

Abstract

Abstract:

The eastern Henan Province is located at the southern edge of the North China Basin and is currently one of the main areas for coalbed methane exploration in China. The Permo-Carboniferous is the main coal-forming period in this area,and the coal measures were deposited in the marine-terrestrial transitional environments,being characterized by a wide and stable distribution. On the basis of drilling date,outcrop sections and geophysical logging date,the sequence stratigraphic framework was established for the Permo-Carboniferous coal measures in this area. Based on the regional unconformity surface,the coal-bearing series in the study area are subdivided into three third-order sequences. Combined with formation,percentages of limestones,mudstone thickness,sandstone to mudstone thickness ratios,coal thickness contour map,restore the sequence of the palaeogeographical maps,the main palaeogeographical unit with delta plain,barrier island,tidal-lagoon,and carbonate shelf. The coals in sequence I and sequence Ⅱ were mainly formed in the tidal-lagoon environment,while the coals in sequence Ⅲ were formed in the delta plain and tidal environment.Among them,the major coal seam(A-0,A-5)in sequence Ⅰ and the major coal seam(B-1)in sequence Ⅲ are well developed. The A-0 and A-5 coal seam were formed in a peat swamp developed from the offshore shelf settings,located near the initial flooding surface and the end of the HST in sequence Ⅰ where the slow rate of sea level rise and thus the slow rate of accommodation space growth was balancing with the slow rate of peat accumulation,A-0 coal seam developed well in Zhecheng area and A-5 coal seam developed well in Huaiyang area. The B-1 coal seam was formed in the peat swamp environment developed from of the fluvial-dominated shallow water delta plain,near the maximum flooding surface of sequence Ⅲ where the fast sea level rise and thus the fast growth rate of the accommodation growth was well matching the high rate of peat accumulation. The balance between the rates in peat accumulation and the rates in accommodation space creation is a key condition for coal accumulation in the sequence stratigraphic framework. The B-1 coal seam developed well in Zhecheng,Huaiyang and Taikang areas.

Key words: sequence stratigraphic framework, lithofacies palaeogeography, coal-accumulating model, Permo-Carboniferous, marine and terrestrial transitional facies, easrern Henan Province

摘要：

豫东地区位于华北盆地南缘,是目前中国进行煤系气勘探开发的主要地区之一,石炭—二叠纪是其主要聚煤期。在对钻孔岩心、露头剖面及测井资料分析的基础上,建立了豫东地区石炭—二叠纪海陆过渡相含煤岩系的层序地层格架,将含煤岩系划分为3个三级层序。并结合地层厚度、石灰岩含量、泥岩厚度、砂泥比、煤层厚度等值线图,恢复了各层序的古地理图,主要的古地理单元有三角洲、潮汐沙坝、潮坪—潟湖和碳酸盐岩台地等,层序Ⅰ和层序Ⅱ煤层形成于潮坪—潟湖环境,层序Ⅲ煤层形成于三角洲平原环境以及潮坪—潟湖环境。豫东地区层序Ⅰ底部的0号煤层以及顶部的一₅煤层和层序Ⅲ的二₁煤层发育较好,0号煤层和一₅煤层形成于浅水陆棚淤浅而成的泥炭沼泽环境中,位于层序Ⅰ的初始海泛面附近和高位体系域末期,此时海平面上升速率慢,较慢的可容空间增长速率与较慢的泥炭聚集速率相平衡,形成厚煤层,层序Ⅰ时期0号煤层在柘城一带发育较好,一₅煤层在淮阳附近发育较好; 二₁煤层形成于分流间湾淤浅而成的泥炭沼泽中,在层序格架中,位于层序Ⅲ最大海泛面附近,此时海平面上升速率较快,较快的可容空间的增长速率与较高的泥炭聚集速率相平衡,形成该厚煤层,二₁煤层在柘城以及太康、淮阳等地区发育较好。

关键词: 层序地层格架, 岩相古地理, 聚煤模式, 石炭—二叠纪, 海陆过渡相, 豫东地区

CLC Number:

P618.11

WU Huiyong, XU Liji, ZHU Shaojun, ZHANG Mengge, XU Jun, SHI Xiaowei, SHAO Longyi. Characteristics of sequence-palaeogeography and coal-accumulating models of the Permo-Carboniferous coal-bearing series in eastern Henan Province[J]. Journal of Palaeogeography（Chinese Edition）, 2026, 28(2): 695-707.

吴会永, 许礼纪, 朱绍军, 张孟鸽, 许军, 史小卫, 邵龙义. 豫东地区石炭—二叠纪含煤岩系层序—古地理与聚煤规律^*[J]. 古地理学报, 2026, 28(2): 695-707.

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Figures/Tables 10

Fig.1 Regional geological background in eastern Henan Province

Fig.2 Key sequence stratigraphic boundary of the Permo-Carboniferous in eastern Henan Province (Well ZM-1)

Fig.3 Basal erosion surface in incised valley sandstone of the Xiashihezi Formation and rooted clay in Yuzhou Dafengkou section

Fig.4 Columnar section showing sedimentary facies and sequence stratigraphy of the Permo-Carboniferous coal measures in eastern Henan Province(Well ZK6404)

Fig.5 Cross section showing sequence stratigraphic correlation of the Permo-Carboniferous coal measures in eastern Henan Province

Fig.6 Contours of single-factor lithological parameters and palaeogeography of sequence I of the Permo-Carboniferous in eastern Henan Province

Fig.7 Tidal bedding in the Taiyuan Formation of eastern Henan Province

Fig.8 Contours of single-factor lithological parameters and palaeogeography of sequence Ⅱ of the Permo-Carboniferous in eastern Henan Province

Fig.9 Contours of single-factor lithological parameters and palaeogeography of sequence Ⅲ of the Permo-Carboniferous in eastern Henan Province

Fig.10 Accumulating models of thick coal seams in sequence I and sequence Ⅲ of the Permo-Carboniferous in eastern Henan Province

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