柴西地区南翼山构造天然气来源及成藏模式

doi:10.7623/syxb201504005

石油学报 ›› 2015, Vol. 36 ›› Issue (4): 446-456.DOI: 10.7623/syxb201504005

柴西地区南翼山构造天然气来源及成藏模式

汤国民^1,2, 罗群³, 庞雄奇², 向才富², 汪立群⁴, 魏浩元⁵

1. 中海石油(中国)有限公司天津分公司勘探开发研究院天津 300452;
2. 中国石油大学地球科学学院北京 102249;
3. 中国石油大学非常规天然气研究院北京 102249;
4. 中国石油青海油田公司勘探开发研究院甘肃敦煌 736202;
5. 中国石油玉门油田公司勘探开发研究院甘肃酒泉 735019

收稿日期:2014-11-04 修回日期:2015-02-13 出版日期:2015-04-25 发布日期:2015-04-04
通讯作者: 罗群,男,1963年9月生,1986年获中国地质大学(武汉)学士学位,2001年获中国石油勘探开发研究院博士学位,现为中国石油大学(北京)非常规天然气研究院副教授、硕士生导师,主要从事非常规油气资源成藏与评价研究工作。Email:luoqun2002@263.net
作者简介:汤国民,男,1987年6月生,2011年获长江大学学士学位,2014年获中国石油大学(北京)硕士学位,现为中海石油(中国)有限公司天津分公司勘探开发研究院助理工程师,主要从事石油地质综合研究及地化分析工作。Email:tgm610@163.com
基金资助:
国家重点基础研究发展计划(973)项目(2011CB201100)和国家重大科技专项(2008ZX05008-004-012)资助。

Origin and accumulation model of natural gas in Nanyishan structure of western Q aidam Basin

Tang Guomin^1,2, Luo Qun³, Pang Xiongqi², Xiang Caifu², Wang Liqun⁴, Wei Haoyuan⁵

1. Exploration and Development Research Institute of Bohai Oil Field, Tianjin Branch of CNOOC China Limited, Tianjin 300452, China;
2. College of Geosciences, China University of Petroleum, Beijing 102249, China;
3. Unconventional Gas Research Institute, China University of Petroleum, Beijing 100429, China;
4. Research Institute of Exploration and Development, PetroChina Qinghai Oilfield Company, Gansu Dunhuang 736200, China;
5. Research Institute of Petorleum Exploration and Development, PetroChina Yumen Oilfield Company, Gansu Jiuquan 735019, China

Received:2014-11-04 Revised:2015-02-13 Online:2015-04-25 Published:2015-04-04

摘要/Abstract

摘要：

以现今南翼山构造古近系和新近系天然气藏及其共生油藏的特征为研究基础,利用已发现气藏中天然气碳同位素特征及其共生原油的地球化学特征,进行了气源分析和油源对比,通过天然气成藏史恢复,对南翼山构造古近系和新近系气藏的成藏过程进行了系统分析。研究认为:①南翼山构造古近系和新近系气藏中高成熟度的天然气是以中生界煤系烃源岩演化生成的煤型气为主,古近系和新近系烃源岩演化生成的天然气量相对较少;②南翼山构造长期活动的基底断裂是古近系和新近系天然气藏形成的主控因素。通过对天然气来源分析,并结合构造演化,总结出了南翼山构造多源混合供烃、断裂裂缝输导体系输导、晚期构造混合聚集成藏模式,以此为依据预测了柴达木盆地中生界煤系烃源岩新的沉积范围,可以成为下一步煤型气勘探的有利方向。

关键词: 天然气, 南翼山构造, 成藏模式, 油源对比, 构造演化史

Abstract:

Based on the characteristics of Paleogene and Neogene natural gas reservoirs as well as their symbiotic reservoirs of Nanyishan structure, carbon isotope characteristics of natural gas and geochemical characteristics of symbiotic crude oil in the existing gas reservoirs were used for gas source analysis and oil source correlation. Through the restoration of natural gas accumulation history, a systematical analysis was conducted on the accumulation process of Paleogene and Neogene gas reservoirs in Nanyishan Structure. Studies have shown that: 1) in Nanyishan structure, the high-maturity natural gas in the Paleogene and Neogene gas reservoirs are dominated by coal-related gas evolving from Mesozoic coal-measure source rocks with less amount of natural gas evolving from Paleogene and Neogene source rocks; 2) the basement faults with long-term activities are the main control factor for the formation of Paleogene and Neogene natural gas reservoirs. Through an analysis on natural gas sources in combination with tectonic evolution, the accumulation model of Nanyishan structure was obtained including the multi-source hybrid hydrocarbon supply, transportation of fault-fissure transport system and late tectonic hybrid aggregation. Accordingly, the new sedimentary scope of Mesozoic coal-measure source rocks in Qaidam Basin was predicted, providing a favorable direction for the next step of coal-related gas exploration.

Key words: natural gas, Nanyishan structure, accumulation model, oil-source correlation, structural evolution history

中图分类号:

TE122.1

汤国民, 罗群, 庞雄奇, 向才富, 汪立群, 魏浩元. 柴西地区南翼山构造天然气来源及成藏模式[J]. 石油学报, 2015, 36(4): 446-456.

Tang Guomin, Luo Qun, Pang Xiongqi, Xiang Caifu, Wang Liqun, Wei Haoyuan. Origin and accumulation model of natural gas in Nanyishan structure of western Q aidam Basin[J]. Acta Petrolei Sinica, 2015, 36(4): 446-456.

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柴西地区南翼山构造天然气来源及成藏模式

Origin and accumulation model of natural gas in Nanyishan structure of western Q aidam Basin

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