Formation conditions and characteristics of large-scale unconsolidated lithologic sandstone reservoirs in Bohai Bay Basin

Xue Yong'an; Li Long; Wang Haixue; Guo Jingzhen

doi:10.7623/syxb202606002

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Formation conditions and characteristics of large-scale unconsolidated lithologic sandstone reservoirs in Bohai Bay Basin

更新时间：2026-07-10

- Formation conditions and characteristics of large-scale unconsolidated lithologic sandstone reservoirs in Bohai Bay Basin
- ACTA PETROLEI SINICA Vol. 47, Issue 6, Pages: 1149-1160(2026)
- 作者机构：
  
  1. 天津大学海洋科学与技术学院,天津,300072
  2. 中海石油(中国)有限公司天津分公司,天津,300459
  3. 东北石油大学地球科学学院,黑龙江,大庆,163319
- 作者简介：
- 基金信息：
- DOI：10.7623/syxb202606002
  CLC： TE122.3
- Online First：02 July 2026，
  
  Published：2026
- 稿件说明：
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薛永安, 李龙, 王海学, 郭景震. 渤海湾盆地大型疏松砂岩岩性油藏形成条件与特征[J]. 石油学报, 2026, 47(6): 1149-1160,1189.

Xue Yong'an, Li Long, Wang Haixue, et al. Formation conditions and characteristics of large-scale unconsolidated lithologic sandstone reservoirs in Bohai Bay Basin[J]. ACTA PETROLEI SINICA, 2026, 47(6): 1149-1160.
薛永安, 李龙, 王海学, 郭景震. 渤海湾盆地大型疏松砂岩岩性油藏形成条件与特征[J]. 石油学报, 2026, 47(6): 1149-1160,1189. DOI： 10.7623/syxb202606002.

Xue Yong'an, Li Long, Wang Haixue, et al. Formation conditions and characteristics of large-scale unconsolidated lithologic sandstone reservoirs in Bohai Bay Basin[J]. ACTA PETROLEI SINICA, 2026, 47(6): 1149-1160. DOI： 10.7623/syxb202606002.

摘要

浅层新近系是渤海油田的主力储量、产量层系

随着勘探程度越来越高

渤海海域浅层规模储量发现的难度越来越大。为了保证渤海油田持续增储上产

针对渤海海域浅层大型疏松砂岩岩性油藏

结合其油气成藏要素的配置关系、富集规律研究

对其成藏主控因素与成藏模式进行了系统梳理

重新认识了渤海海域浅层油气的运移条件

明确了浅层油气富集与深层油气初次、二次运移的关系以及浅层油气富集、贫化的机理

建立了“汇聚脊”控制浅层油气富集的模式。研究结果表明:①渤海海域浅层油气的规模成藏受控于“汇聚脊”类型和岩性圈闭规模;②“汇聚脊”是油气初次、二次运移的优势汇聚部位

“汇聚脊”的类型控制了源外浅层油气成藏;③“枝蔓式”砂体形成的疏松砂岩大型岩性圈闭控制了油气的富集。在新认识的指导下

渤海海域多个构造带的浅层油气勘探取得了突破

获得一系列亿吨级新发现。渤海海域浅层油气运移成藏理论和技术的创新与勘探突破不仅对其后续勘探具有重要的促进作用

也对渤海湾盆地陆区甚至中国东部老油区勘探具有一定的借鉴意义

同时具有很高的科学价值。

Abstract

The shallow Neogene reservoirs dominate reserves and production in Bohai oilfield. As exploration matures

discovery of large-scale shallow reserves in Bohai Sea has become increasingly challenging. To ensure sustained increase in reserve and production

this study systematically evaluates the main controlling factors and accumulation models of large-scale shallow unconsolidated lithologic sandstone reservoirs in Bohai Sea

integrating the configuration of petroleum system elements with enrichment patterns. Through a reassessment of shallow hydrocarbon migration conditions

it elucidates the relationship between shallow enrichment and the primary and secondary migration of deep-seated hydrocarbons

as well as the mechanisms governing shallow enrichment and depletion. Consequently

a convergence ridge mode for shallow hydrocarbon enrichment is established. The research results indicate as follows. (1) Large-scale shallow hydrocarbon accumulation in Bohai Sea is governed by catchment ridge types and lithological trap scales. (2) Catchment ridges serve as preferential pathways for primary and secondary hydrocarbon migration

with their specific types controlling the accumulation of shallow reservoirs beyond the source kitchens. (3) Large-scale unconsolidated sandstone lithologic traps

characterized by dendritic sand bodies

dictate hydrocarbon enrichment. Guided by these new insights

significant breakthroughs in shallow hydrocarbon exploration have been achieved across multiple structural zones in Bohai Sea

leading to a series of hundred-million-ton discoveries. The innovations in migration-accumulation theory and technology

along with the subsequent exploration successes

not only facilitate future efforts in Bohai Sea but also provide strategic references and high scientific value for exploration in the onshore Bohai Bay Basin and mature oil provinces across eastern China.

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