渤海海域中南部潜山源‒储配置与油气成藏规模研究

官大勇; 王昕; 叶涛; 彭靖淞; 滑彦岐

doi:10.3799/dqkx.2026.104

Volume 51 Issue 5

May 2026

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Guan Dayong, Wang Xin, Ye Tao, Peng Jingsong, Hua Yanqi, 2026. Source-Reservoir Configuration and Hydrocarbon Accumulation Scale of Buried Hills in Central-Southern Bohai Sea Area. Earth Science, 51(5): 1652-1666. doi: 10.3799/dqkx.2026.104

Citation:

Guan Dayong, Wang Xin, Ye Tao, Peng Jingsong, Hua Yanqi, 2026. Source-Reservoir Configuration and Hydrocarbon Accumulation Scale of Buried Hills in Central-Southern Bohai Sea Area. Earth Science, 51(5): 1652-1666. doi: 10.3799/dqkx.2026.104

Citation:

Guan Dayong, Wang Xin, Ye Tao, Peng Jingsong, Hua Yanqi, 2026. Source-Reservoir Configuration and Hydrocarbon Accumulation Scale of Buried Hills in Central-Southern Bohai Sea Area. Earth Science, 51(5): 1652-1666. doi: 10.3799/dqkx.2026.104

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Source-Reservoir Configuration and Hydrocarbon Accumulation Scale of Buried Hills in Central-Southern Bohai Sea Area

doi: 10.3799/dqkx.2026.104

Tianjin Branch of CNOOC (China) Limited, Tianjin 300459, China

Received Date: 2025-12-31
Publish Date: 2026-05-25

Abstract

Abstract

The central-southern Bohai Sea area develops diverse types of buried hills with substantial petroleum exploration potential. However, the scale of hydrocarbon accumulation varies significantly among different buried hills, and the key controlling factors remain to be clarified. The source-reservoir configuration is the core element controlling efficient hydrocarbon accumulation and enrichment scale. This study systematically analyzes the source-reservoir configuration characteristics of buried hills in different structural positions within the study area and their control on accumulation scales by integrating seismic, geological, and geochemical data. Based on the spatial coupling relationship between buried hills and source rocks, migration pathways, and reservoir development characteristics, the buried hills are classified into three types: source-reservoir superimposed, source-reservoir lateral-connected, and distal-source transported types. The results indicate that source-reservoir superimposed buried hills, typically located in sag areas, exhibit the highest accumulation efficiency due to their proximity to source rocks, large source-reservoir pressure differential, and superior preservation conditions characterized by "source-caprock integration", securing their optimal configuration for discovering giant oil and gas fields. Source-reservoir lateral-connected buried hills, often situated in slope zones/low uplift, feature multiple source rock contributions, three-dimensional migration pathways, and favorable reservoir-seal assemblages, facilitating the formation of medium to large oil and gas fields. In contrast, distal-source transported buried hills, predominantly found in uplift areas, despite their shallow burial depths, present high exploration risks due to long migration distances from source rocks, small source-reservoir pressure differentials, low migration efficiency, and poor preservation conditions. This study establishes a buried hill classification and evaluation model based on source-reservoir configuration, identifying source-reservoir superimposed and lateral-connected buried hills in sag to slope zones as favorable targets for subsequent exploration. The findings provide an important theoretical basis and decision-making guidance for the exploration deployment of large-scale buried hill oil and gas fields in sag areas of "Super basins".
- Super basin,
- Bohai Sea,
- buried hill oil and gas reservoirs,
- source-reservoir coupling relationship,
- hydrocarbon enrichment,
- exploration direction,
- petroleum geology,
- marine geology

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References(61)

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Source-Reservoir Configuration and Hydrocarbon Accumulation Scale of Buried Hills in Central-Southern Bohai Sea Area

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