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黄骅坳陷沧东凹陷孔店组石油资源潜力及勘探方向

作    者:姜文亚1,2,王 娜2,汪晓敏2,林常梅2,祝必兴2,代 昆2,于 超2,邹磊落2
单    位:1 中国石油大学(北京);2 中国石油大港油田公司
基金项目:受中国石油集团重大专项之课题“大港探区第四次油气资源评价”联合资助
摘    要:
渤海湾盆地黄骅坳陷沧东凹陷的主要烃源岩层系为古近系孔店组二段,它生成的油气主要富集于孔店组和沙河街组储层中。在石油地质条件综合分析的基础上,以孔二段优质烃源岩为核心,建立了源上孔一段构造-岩性油藏、源侧孔二段地层-岩性油藏和源内页岩油等3种成藏模式。采用改进的成因法进行常规油与页岩油资源评价,其核心思想是用剥离计算的生烃量、排烃量及残留烃量进行约束,采用多参数类比法计算运聚系数并评价常规油资源,采用质量含油率法评价页岩油资源。评价结果表明:沧东凹陷孔店组常规石油资源量约为6.9×108 t,页岩油资源量约为6.8×108 t;孔店组剩余石油资源分布在源上孔一段构造-岩性油藏、中低斜坡区地层-岩性油藏和湖盆中心区页岩油等3大领域。页岩油资源潜力巨大,是未来最主要的勘探接替领域。
关键词:地质条件;资源潜力;勘探方向;石油;沧东凹陷;黄骅坳陷;渤海湾盆地

Oil resources potential and exploration direction of Kongdian Formation in Cangdong Sag , Huanghua Depression of Bohai Bay Basin

Author's Name: JIANG Wenya, WANG Na, WANG Xiaomin, LIN Changmei, ZHU Bixing, DAI Kun, YU Chao, ZOU Leiluo
Institution: China University of Petroleum
Abstract:
The Kongdian Member-2 of the Paleogene is the main source rock series in Cangdong Sag, Huanghua Depression in Bohai Bay Basin. The oil and gas generated by it are mainly concentrated in the reservoirs of Kongdian Formation and Shahejie Formation. Based on analysis of comprehensive petroleum conditions, three reservoir-forming patterns, i.e. structural-lithologic reservoir in Kong member-1 above source rocks, stratigraphic-lithologic reservoir in Kong member-2 beside source rocks and shale oil in source rocks, have been established with high-quality source rocks as the key factor. The improved genesis method is used to evaluate the conventional oil and shale oil resources with the calculated amounts of the generated, expulsion and residual hydrocarbons based on experiment as constraint. The multi-parameters analogy method is used to calculate the migration and accumulation coefficient and then evaluate the conventional oil resources. The quality-oil-content method is used to evaluate the shale oil resources. The results show that the amounts of conventional oil resources and shale oil resources of Kongdian Formation in Cangdong Sag are about 6.9×108 t and 6.8×108 t respectively, and the remaining oil resources of Kongdian Formation are distributed in three major fields, namely, structural-lithologic reservoirs in Kongdian Member-1, stratigraphic-lithologic reservoirs in middle-low slope areas and shale oil in the central area of the lake basin. The potential of shale oil resources is huge, and it will be the main exploration fileds in the future.
Keywords: geological conditions; resource potential; exploration direction; oil; Cangdong Sag; Huanghua Depression; Bohai Bay Basin
投稿时间:2018-12-08  
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