塔河油田下寒武统烃源岩生排烃史差异演化及成藏效应

徐勤琪; 张黎; 李斌; 钟笠; 张欣; 周浩栋

doi:10.3969/j.issn.1006-6535.2024.01.003

特种油气藏 >

2024 , Vol. 31 >Issue 1: 20 - 30

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.01.003

地质勘探

塔河油田下寒武统烃源岩生排烃史差异演化及成藏效应

徐勤琪 ,
张黎 ,
李斌 ,
钟笠 ,
张欣 ,
周浩栋

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1.中国石化西北油田分公司,新疆乌鲁木齐 830011;
2.西南石油大学,四川成都 610500;
3.西南石油大学油气藏地质及开发工程全国重点实验室,四川成都 610500;
4.中国石油塔里木油田分公司,新疆库尔勒 841000

徐勤琪(1985—),男,副研究员,2007年毕业于西南石油大学资源勘查工程专业,现从事石油地质、油气成藏研究工作。

收稿日期: 2023-07-06

修回日期: 2023-12-16

网络出版日期: 2024-04-18

基金资助

中国石化科技部项目“塔北奥陶系油气富集规律与增储目标评价”(P21048-3);四川省区域创新合作项目“复杂油藏高效开发相关技术研究及推广应用”(21QYCX0048)

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Differential Evolutions of Hydrocarbon Generation and Expulsion History of Lower Cambrian Source Rocks in Tahe Oilfield and Accumulation Effects

Xu Qinqi ,
Zhang Li ,
Li Bin ,
Zhong Li ,
Zhang Xin ,
Zhou Haodong

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1. Sinopec Northwest Oilfield Company, Urumqi, Xinjiang 830011, China;
2. Southwest University of Petroleum, Chengdu, Sichuan 610500;
3. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
4. PetroChina Tarim Oilfied Campany, Korla, Xinjiang 841000, China

Received date: 2023-07-06

Revised date: 2023-12-16

Online published: 2024-04-18

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摘要

针对塔河奥陶系油藏多相态油气富集主控因素认识不清的问题,采用盆地模拟技术再现了塔河油田下寒武统烃源岩热演化史、生烃史及典型剖面油气运聚过程。研究表明:塔河地区下寒武统烃源岩从加里东早期进入成熟阶段,目前处于高成熟—湿气阶段,发育断续埋藏、持续埋藏和长期浅埋藏3种热演化模式,分别对应油气并举双峰型、油强气弱型、单峰型3种生烃模式。烃源岩热演化差异致使奥陶系油气发育多期充注、垂向疏导、侧向调整改造的演化历史,油气相态呈现轻质油藏—中质油藏—重质油藏的有序分布格局。塔河地区不同构造带下寒武统烃源岩热演化具有由北西向南东递增的趋势,与油气相态差异呈现明显的正相关性,体现出“源控”特征,喜山期控制了现今油气藏分布。研究发现,塔河油田盐下、托甫台生烃强度高,喜山期生烃总量相对较大,可作为下一步勘探开发的有利区。研究结果对塔河油田深层油气资源和目标评价有一定指导意义。

关键词： 烃源岩; 埋藏史; 热史; 盆地模拟; 成藏效应; 塔河油田

本文引用格式

徐勤琪 , 张黎 , 李斌 , 钟笠 , 张欣 , 周浩栋 . 塔河油田下寒武统烃源岩生排烃史差异演化及成藏效应[J]. 特种油气藏, 2024 , 31(1) : 20 -30 . DOI: 10.3969/j.issn.1006-6535.2024.01.003

Abstract

In response to the unclear understanding of the main controlling factors for multiphase oil and gas enrichment of the Ordovician oil reservoirs in Tahe Oilfield, the basin simulation technology was used to reconstruct the thermal evolution history and hydrocarbon generation history of the Lower Cambrian source rocks, and oil and gas migration and accumulation processes of typical profiles. The research shows that the Lower Cambrian source rocks in Tahe Area have entered a mature stage from the early Caledonian period and are currently in a high maturity-wet gas stage. They have developed three thermal evolution models of intermittent burial, continuous burial, and long-term shallow burial, corresponding to three hydrocarbon generation models of dual peak, strong oil and weak gas, and single peak. The differential thermal evolutions of source rocks lead to the history of oil and gas evolution with multiple stages of filling, vertical migration, and lateral adjustment and transformation in the Ordovician. The oil and gas phases present an orderly distribution pattern of light-medium-heavy oil reservoirs. The thermal evolutions of the Lower Cambrian source rocks in different structural belts in Tahe Area show a trend of increasing from northwest to southeast, showing a clear positive correlation with the differences in oil and gas phases, reflecting the characteristics of "source control". The thermal evolution characteristics controlled the distribution of current oil and gas reservoirs in the Himalayan period. Research indicates that the hydrocarbon generation intensities in the salt zone and Tuofutai of Tahe Oilfield are high, and the total amount of hydrocarbon generation during the Himalayan period is relatively large, making it a favorable area for further exploration and development. The research results have certain guiding significance for the evaluation of deep oil and gas resources and targets in Tahe Oilfield.

Key words： source rock; burial history; heat history; basin simulation; accumulation effect; Tahe Oilfield

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