塔北—塔中隆起奥陶系富油气三角带断裂特征及控藏分析

汪如军; 冯建伟; 李世银; 昌伦杰; 杜赫; 邓兴梁

doi:10.3969/j.issn.1006-6535.2023.02.004

特种油气藏 >

2023 , Vol. 30 >Issue 2: 26 - 35

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.02.004

地质勘探

塔北—塔中隆起奥陶系富油气三角带断裂特征及控藏分析

汪如军 ,
冯建伟 ,
李世银 ,
昌伦杰 ,
杜赫 ,
邓兴梁

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1.中国石油塔里木油田分公司,新疆库尔勒 841000;
2.中国石油大学(华东),山东青岛 266580

汪如军(1968—),男,教授级高级工程师,1990年毕业于江汉石油学院石油地质勘察专业,现主要从事油气田开发方面的研究工作。

收稿日期: 2022-04-29

修回日期: 2022-12-12

网络出版日期: 2023-05-29

基金资助

中国石油重大科技项目“塔里木盆地深层油气高效勘探开发理论及关键技术研究”(ZD2019－183－006)

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Analysis on Fault Characteristics and Reservoir Control of Ordovician Hydrocarbon-Rich Triangle Zone in Tabei-Tazhong Uplift

Wang Rujun ,
Feng Jianwei ,
Li Shiyin ,
Chang Lunjie ,
Du He ,
Deng Xingliang

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1. PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China;
2. China University of Petroleum (East China), Qingdao, Shandong 266580, China

Received date: 2022-04-29

Revised date: 2022-12-12

Online published: 2023-05-29

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摘要

针对塔北—塔中奥陶系碳酸盐岩富油气三角带断裂控储控藏欠缺系统性认识的问题,通过地震精细解释和构造力学机制分析,对塔北—塔中地区走滑断裂和油藏分布特征进行系统性研究,尤其从断层形成的力学机制、断层规模、断层分段性及断层组合样式等方面,剖析富油气三角带的发育特征及油气富集机制。研究表明:塔北—塔中地区的油气受控于2条区域级走滑断裂,其组合形成的富油气三角带内各断裂级别差异明显,且存在明显分段特征;塔中地区断裂带一般分为线性段、斜列段和羽状段,塔北地区断裂带可分为辫状堑垒段、拉分段和羽状段;断裂分段性导致同一断裂不同段油气富集特征具有明显差异,针对不同段可采用不同程度的开发方式,能有效提高储量整体动用程度。该研究可为国内外相似地质条件的碳酸盐岩油气藏勘探提供有益的借鉴。

关键词： 奥陶系; 碳酸盐岩; 控藏因素; 断裂系统; 油气运移; 塔北—塔中隆起

本文引用格式

汪如军 , 冯建伟 , 李世银 , 昌伦杰 , 杜赫 , 邓兴梁 . 塔北—塔中隆起奥陶系富油气三角带断裂特征及控藏分析[J]. 特种油气藏, 2023 , 30(2) : 26 -35 . DOI: 10.3969/j.issn.1006-6535.2023.02.004

Abstract

In view of the lack of systematic understanding of reservoir and accumulation control of faults in the Ordovician hydrocarbon-rich triangle zone in Tabei-Tazhong Uplift, a systematic study was conducted on the distribution characteristics of the strike-slip faults and reservoirs in the Tabei-Tazhong Area through detailed seismic interpretation and tectonic mechanic mechanism analysis, especially the development characteristics and hydrocarbon enrichment mechanism of hydrocarbon-rich triangle zone were analyzed through the mechanical mechanism of fault formation, fault scale, fault segmentation and fault combination style, et al. It was found in the study that the hydrocarbons in Tabei-Tazhong Area were controlled by two regional strike-slip faults, there were obvious differences in fault levels in the hydrocarbon-rich triangle zone formed by the two faults, and there were obvious segmentation characteristics; the fault zone in Tazhong Area was generally divided into linear, diagonal and feather segments, while the fault zone in Tabei Area could be divided into braided-grabon, tensilesegment and pinnate feather segments; the fault segmentation resulted in significant differences in hydrocarbon enrichment characteristics in different segments of the same fault, and different development methods could be used for different segments to improve the overall productivity of reserves. The study can provide valuable reference for the exploration of carbonate reservoirs with similar geological conditions at home and abroad.

Key words： Ordovician; carbonate rock; reservoir control factors; fracture system; hydrocarbon migration; Tabei-Tazhong Uplift

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