王建光，张大志，石记鹏，等.渤海湾盆地外围凹陷含油气特征与资源潜力评价［J］.河南理工大学学报(自然科学版), doi: 10.16186/j.cnki.1673-9787.2024040018.

WANG J G, ZHANG D Z, SHI J P, et al. Petroleum characteristics and resource potential evaluation of peripheral depressions in the Bohai Bay Basin［J］. Journal of Henan Polytechnic University（Natural Science），doi: 10.16186/j.cnki.1673-9787.2024040018.

渤海湾盆地外围凹陷含油气特征与资源潜力评价(网络首发)

王建光¹，张大志¹，石记鹏¹，刘海涛²，张致远¹，张航¹，李婷¹，何山¹

（1.河南省地质矿产勘查开发局第一地质勘查院，河南 郑州 450000；2.中国石油勘探开发研究院，北京 100080）

摘要:以往渤海湾盆地研究多集中于主体坳陷，对外围凹陷缺乏重视，研究认识薄弱。 目的 为进一步明确渤海湾盆地外围凹陷的含油气特征与资源潜力分布情况， 方法 基于地质结构、沉降类型和成藏组合特征对渤海湾盆地外围凹陷的含油气特征进行对比分析，并根据烃源岩条件、储集层条件、圈闭条件、油气保存条件以及圈闭形成与生烃高峰期时空匹配关系建立渤海湾盆地外围凹陷资源潜力的分级评价标准，对渤海湾盆地外围凹陷的资源潜力进行分级评价。 结果 结果表明：富油气凹陷以面积大、烃源岩埋藏深的箕状Ⅱ型凹陷为主，外围凹陷以面积较小的箕状Ⅰ型凹陷为主，含油气情况相对较差；外围凹陷一般为早期强烈断陷型，生烃能力差，油气富集程度偏低；外围凹陷往往以一至两套成藏组合相对含油，而富油凹陷三大成藏组合普遍存在。武清凹陷和盐山凹陷为Ⅰ类凹陷，资源潜力大，勘探开发前景好，为下步油气增储的靶向区域；乐亭凹陷、大厂凹陷、南宫凹陷、保定凹陷、石家庄凹陷和涧河凹陷为Ⅱ类凹陷，资源潜力一般，具有一定的勘探开发价值；吴桥凹陷、北京凹陷、徐水凹陷和昌黎凹陷为Ⅲ类凹陷，油气成藏条件差，资源潜力小，勘探开发难度大。 结论 渤海湾盆地外围凹陷的剩余油气资源依然丰富，具备形成规模油气藏的有利条件。通过精细研究，有望成为未来油气勘探的重要接替领域。

关键词: 渤海湾盆地；外围凹陷；含油气特征；油气成藏条件；烃源岩；资源潜力

中图分类号：TE122　　

doi: 10.16186/j.cnki.1673-9787.2024040018

基金项目: 国家重点研发专项项目（2023YFF0804303）

收稿日期：2024-04-11

修回日期：2024-09-19

网络首发日期：2024-10-28

Petroleum characteristics and resource potential evaluation of peripheral depressions in the Bohai Bay Basin (Online)

WANG Jianguang¹, ZHANG Dazhi¹, SHI Jipeng¹, LIU Haitao², ZHANG Zhiyuan¹, ZHANG Hang¹, LI Ting¹, HE Shan¹

（1.The First Geological Exploration Institute of Henan Provincial Bureau of Geology and Mineral Exploration and Development, Zhengzhou, 450000, Henan, China;2.PetroChina Research Institute of Petroleum Exploration & Development, Beijing, 100080, China）

Abstract: Previous studies on the Bohai Bay Basin have mostly focused on the main depression, neglecting the peripheral depressions, resulting in limited understanding. Objectives To further clarify the hydrocarbon-bearing characteristics and the distribution of resource potential in the peripheral depressions of the Bohai Bay Basin. Methods A comparative analysis of the hydrocarbon-bearing characteristics of the peripheral depressions in the Bohai Bay Basin was conducted, based on geological structures, subsidence types, and reservoir-forming assemblages. Furthermore, a graded evaluation standard for the resource potential of these peripheral depressions was established, taking into account the conditions of hydrocarbon source rocks, reservoir rocks, traps, hydrocarbon preservation, and the spatial-temporal matching relationship between trap formation and hydrocarbon generation peak. This standard was then applied to conduct a graded evaluation of the resource potential of the peripheral depressions in the Bohai Bay Basin. Results Hydrocarbon-rich depressions are mainly large-area, deeply buried, dustpan-shaped Type II depressions, while peripheral depressions are mainly small-area, dustpan-shaped Type I depressions with relatively poor hydrocarbon-bearing conditions; Peripheral depressions are generally early-stage intense faulted depressions with poor hydrocarbon generation capacity and low hydrocarbon enrichment; Peripheral depressions often contain one to two relatively oil-bearing reservoir-forming assemblages, while hydrocarbon-rich depressions commonly have three reservoir-forming assemblages. The Wuqing and Yanshan depressions are classified as Type I depressions with significant resource potential and good exploration and development prospects, serving as target areas for future oil and gas reserve growth. The Laoting, Dachang, Nangong, Baoding, Shijiazhuang, and Jianhe depressions are classified as Type II depressions with average resource potential and certain exploration and development value. The Wuqiao, Beijing, Xushui, and Changli depressions are classified as Type III depressions with poor hydrocarbon accumulation conditions, small resource potential, and great difficulty in achieving exploration discoveries. Conclusions The peripheral depressions of the Bohai Bay Basin harbor abundant residual hydrocarbon resources, presenting favorable conditions conducive to the formation of substantial hydrocarbon reservoirs. Through meticulous research endeavors, these depressions hold immense potential to evolve into pivotal successor domains for the future landscape of hydrocarbon exploration.

Key words: Bohai Bay Basin; peripheral depression; hydrocarbon bearing characteristics; conditions for hydrocarbon accumulation; source rock; resource potential

CLC: TE122