环渤中地区新近系控藏模式与高丰度油藏勘探实践

doi:10.7623/syxb202103001

石油学报 ›› 2021, Vol. 42 ›› Issue (3): 273-282.DOI: 10.7623/syxb202103001

• 地质勘探 • 下一篇

环渤中地区新近系控藏模式与高丰度油藏勘探实践

王德英¹, 张宏国¹, 官大勇¹, 任健¹, 刘朋波¹, 程燕君²

1. 中海石油(中国)有限公司天津分公司天津 300459;
2. 中国石油大学(华东)地球科学与技术学院山东青岛 266580

收稿日期:2019-09-12 修回日期:2020-06-22 出版日期:2021-03-25 发布日期:2021-04-09
通讯作者: 张宏国,男,1986年10月生,2009年获中国石油大学(华东)学士学位,2012年获中国石油大学(华东)硕士学位,现为中海石油(中国)有限公司天津分公司高级工程师,主要从事油气运聚研究。Email:zhanghg2@cnooc.com.cn
作者简介:王德英,女,1971年11月生,1993年获长春地质学院学士学位,1998年获长春科技大学硕士学位,现为中海石油(中国)有限公司天津分公司高级工程师,主要从事沉积学与石油地质研究。Email:wangdy2@cnooc.com.cn
基金资助:
国家科技重大专项“近海大中型油气田形成条件及勘探技术”（2016ZX05024-002-006）、中海石油（中国）有限公司科研项目“渤海海域典型地区汇聚脊控藏机理研究”（ZZKY-2019-TJ-01）资助。

Neogene reservoir-controlling mode and exploration practice of high-abundance oil reservoirs in Bozhong sag and its surrounding area

Wang Deying¹, Zhang Hongguo¹, Guan Dayong¹, Ren Jian¹, Liu Pengbo¹, Cheng Yanjun²

1. Tianjin Branch, CNOOC China Limited, Tianjin 300459, China;
2. School of Geosciences, China University of Petroleum(East China), Shandong Qingdao 266580, China

Received:2019-09-12 Revised:2020-06-22 Online:2021-03-25 Published:2021-04-09

摘要/Abstract

摘要： 环渤中地区新构造运动强烈，新近系是主要的含油层系。新近系勘探早期集中于凸起区和陡坡带，而斜坡带和凹陷区由于缺乏油气运移条件的系统性研究导致其勘探成效较差。基于前人研究和钻井资料，从分析环渤中地区新近系油气运移路径出发，通过建立“汇聚脊-断层-圈闭（脊-断-圈）”三元控藏模式，明确了受潜山风化壳汇聚脊控制的深层油气的汇聚能力是新近系油气富集的先决条件，并以圈闭面积为核心创建了聚油指数，用于定量评价深层油气的汇聚能力；明确了断层垂向运移是新近系成藏的关键，断层与汇聚脊、区域盖层的配置关系决定了断层的垂向运移量，当深层盖层的断接厚度小于220 m时油气可运移至浅层；明确了圈闭因素是新近系成藏的最终环节，圈闭与断层的配置关系控制了浅层油气的侧向分流能力，其中，“双断型砂体”的侧向充注能力较强。“汇聚脊-断层-圈闭”三元控藏模式进一步丰富了渤海油田晚期成藏理论，在指导发现大-中型新近系油田以及其他他源层系的勘探中展现出良好的应用前景。

关键词: 汇聚脊, 渤海湾盆地, 环渤中地区, 潜山风化壳, 汇聚指数, 新近系, 油气富集

Abstract: The neotectonic movement is intensive in Bozhong sag and its surrounding area, and the Neogene is the main oil-bearing set. In the early stage, the exploration of Neogene focused on the uplift area and steep slope area, while the exploration of slope area and sag area was poor due to the lack of systematic study of hydrocarbon migration conditions. Based on previous researches and drilling data, as well as the analysis of Neogene oil and gas migration pathway in Bozhong sag and its surrounding area, this paper establishes a ternary reservoir-controlling mode of “catchment ridge-fault-trap”. This mode clarifies that the hydrocarbon accumulation ability in deep layers controlled by the catchment ridge of weathering crust of buried hill is the prerequisite for the Neogene oil and gas enrichment, and creates an oil accumulation index using traps as the core to quantitatively evaluate the deep hydrocarbon accumulation ability. Moreover, it is clarified that the vertical migration of faults is the key to the formation of Neogene reservoirs. The configuration relationship between faults, catchment ridges, and regional cap rocks determines the vertical migration of faults. When the faulted-contact thickness of the deep cap rocks is less than 220 m, oil and gas can migrate to shallow strata. It is clear that trap is the final link for the formation of Neogene reservoirs, and the configuration relationship between traps and faults controls the lateral migration of shallow oil and gas. The dual faulted sandbody has a strong lateral charging capacity. The ternary reservoir-controlling mode of “catchment ridge-fault-trap” has further enriched the late accumulation theory of the Bohai oilfield, and has shown good application prospects in guiding the discovery of mid-large Neogene oilfields and the exploration of other external-sourced strata.

Key words: catchment ridge, Bohai Bay Basin, Bozhong sag and its surrounding area, weathering crust of buried hill, accumulation index, Neogene, oil and gas enrichment

中图分类号:

TE122.3

王德英, 张宏国, 官大勇, 任健, 刘朋波, 程燕君. 环渤中地区新近系控藏模式与高丰度油藏勘探实践[J]. 石油学报, 2021, 42(3): 273-282.

Wang Deying, Zhang Hongguo, Guan Dayong, Ren Jian, Liu Pengbo, Cheng Yanjun. Neogene reservoir-controlling mode and exploration practice of high-abundance oil reservoirs in Bozhong sag and its surrounding area[J]. Acta Petrolei Sinica, 2021, 42(3): 273-282.

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环渤中地区新近系控藏模式与高丰度油藏勘探实践

Neogene reservoir-controlling mode and exploration practice of high-abundance oil reservoirs in Bozhong sag and its surrounding area

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