油源断层输导能力与非生烃层系油气富集的关系——以渤海湾盆地埕岛地区为例

doi:10.7623/syxb202208007

石油学报 ›› 2022, Vol. 43 ›› Issue (8): 1122-1131,1184.DOI: 10.7623/syxb202208007

油源断层输导能力与非生烃层系油气富集的关系——以渤海湾盆地埕岛地区为例

蒋有录¹, 苏圣民¹, 赵凯^1,2

1. 中国石油大学(华东)地球科学与技术学院山东青岛 266580;
2. 中海油研究总院有限责任公司北京 100028

收稿日期:2022-04-05 修回日期:2022-05-23 出版日期:2022-08-25 发布日期:2022-09-05
通讯作者: 蒋有录,男,1959年10月生,1999年获石油大学(北京)博士学位,现为中国石油大学(华东)地球科学与技术学院教授、博士生导师,主要从事油气藏形成与分布规律方面的教学和科研工作。
作者简介:蒋有录,男,1959年10月生,1999年获石油大学(北京)博士学位,现为中国石油大学(华东)地球科学与技术学院教授、博士生导师,主要从事油气藏形成与分布规律方面的教学和科研工作。Email:jiangyl@upc.edu.cn
基金资助:
国家自然科学基金项目(No.41972140)资助。

Relationship between transporting ability of oil-source faults and hydrocarbon enrichment in non-hydrocarbon generating strata:a case study of Chengdao area of Bohai Bay Basin

Jiang Youlu¹, Su Shengmin¹, Zhao Kai^1,2

1. School of Geoscience, China University of Petroleum, Shandong Qingdao 266580, China;
2. CNOOC Research Institute Company Limited, Beijing 100028, China

Received:2022-04-05 Revised:2022-05-23 Online:2022-08-25 Published:2022-09-05

摘要/Abstract

摘要： 在受断层控制的复式油气聚集区,油源断层的输导能力控制了非生烃层系油气富集。以渤海湾盆地埕岛复式油气区为例,综合油源断层发育特征、石油储量分布、烃源岩生烃特征等资料,探讨了油源断层输导能力对非生烃层系新近系油气富集的影响。新近系油源断层的输导能力主要取决于成藏期断层活动速率与活动时间、烃源岩供烃能力、断层延伸长度与断层倾角等影响因素。油源断层切割的烃源岩层的供烃能力总体上控制了新近系油气富集程度;油源断层延伸长度大、主成藏期断层活动速率高且活动时间长,则断层输导油气的能力较强,相关区块的新近系石油储量及圈闭充满度也较大。基于不同地质因素对油源断层输导油气能力的影响,提出了断层活动特征、烃源岩供烃能力和断层静态特征3个影响因子,明确了不同因子影响断层输导能力的权重,建立了油源断层输导能力评价公式。在储-盖组合、圈闭特征、保存条件等成藏条件相似的前提下,油源断层的输导能力与相关区块新近系石油储量具有正相关性,油源断层的输导能力越强,新近系油气富集程度越高。

关键词: 油源断层, 输导能力, 油气纵向运移, 非生烃层系, 油气富集

Abstract: In the compound hydrocarbon accumulation zone controlled by faults,the transportation capacity of oil-source faults controls the hydrocarbon enrichment in the non-hydrocarbon generating strata.This paper is a case study of the compound hydrocarbon accumulation zone in Chengdao area of Bohai Bay Basin.Comprehensively based on the development characteristics of oil-source faults,distribution of petroleum reserves,and hydrocarbon generation features of source rock,the paper explores the influence of the transportation ability of oil-source faults on hydrocarbon enrichment in Neogene strata.The results show that the transportation ability of Neogene oil-source faults mainly depend on the rate and duration of faults activity,hydrocarbon supply capacity of source rocks,and extending length and dip angle of faults during the hydrocarbon accumulation period.On the whole,the Neogene hydrocarbon enrichment is controlled by the hydrocarbon supply capacity of source rocks cut by oil-source faults.The larger the extending length,the higher the rates and the longer the duration of faults activity during the main reservoiring period of oil-source faults,the stronger the fault transportation ability,the larger the Neogene proved reserves,and the higher the trap filling degree in relevant fault blocks.Based on the influence of different geological factors on the hydrocarbon transportation capacity of oil-source faults,this paper proposes three influencing factors such as fault activity characteristics,hydrocarbon supply capacity of source rocks and fault static characteristics,determines the weights of different factors on fault transportation capacity,and sets up the evaluation formula of hydrocarbon transportation capacity of oil-source faults.On the premise of similar reservoiring conditions such as reservoir-cap assemblage,trap characteristics,reservoir physical properties and hydrocarbon preservation conditions,there is a positive correlation between hydrocarbon transportation ability of oil-source faults and the Neogene petroleum reserves in relevant fault blocks;the greater the transportation capacity,the higher the degree of Neogene hydrocarbon enrichment.

Key words: oil-source faults, transportation ability, vertical hydrocarbon migration, non-hydrocarbon generation strata, hydrocarbon enrichment

中图分类号:

TE122.1

蒋有录, 苏圣民, 赵凯. 油源断层输导能力与非生烃层系油气富集的关系——以渤海湾盆地埕岛地区为例[J]. 石油学报, 2022, 43(8): 1122-1131,1184.

Jiang Youlu, Su Shengmin, Zhao Kai. Relationship between transporting ability of oil-source faults and hydrocarbon enrichment in non-hydrocarbon generating strata:a case study of Chengdao area of Bohai Bay Basin[J]. Acta Petrolei Sinica, 2022, 43(8): 1122-1131,1184.

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油源断层输导能力与非生烃层系油气富集的关系——以渤海湾盆地埕岛地区为例

Relationship between transporting ability of oil-source faults and hydrocarbon enrichment in non-hydrocarbon generating strata:a case study of Chengdao area of Bohai Bay Basin

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