柴达木盆地西部南区红柳泉岩性油气藏成藏特征

doi:10.7623/syxb201501006

石油学报 ›› 2015, Vol. 36 ›› Issue (1): 50-59.DOI: 10.7623/syxb201501006

柴达木盆地西部南区红柳泉岩性油气藏成藏特征

桂丽黎^1,2, 刘可禹^1,2,3, 柳少波^1,2, 刘建良^1,2, 孟庆洋^1,2, 袁莉⁴, 郝加庆^1,2, 吴凡⁵

1. 中国石油勘探开发研究院北京 100083;
2. 中国石油天然气集团公司盆地构造与油气成藏重点实验室北京 100083;
3. CSIRO Earth Science and Resource Engineering Bentley Australia P.O. Box 1130;
4. 中国石油青海油田公司勘探开发研究院甘肃敦煌 736202;
5. 中联煤层气有限责任公司北京 100016

收稿日期:2014-07-06 修回日期:2014-11-02 出版日期:2015-01-25 发布日期:2014-12-09
通讯作者: 刘可禹, 男, 1963年10月生, 1984年获青岛海洋大学学士学位, 1993年获澳大利亚国立大学博士学位, 现为CSIRO首席研究员, "千人计划"国家特聘专家, 中国石油勘探开发研究院石油地质实验中心总工程师、研究员, 中国海洋大学、中国石油大学、中国地质大学客座教授;主要从事沉积学、层序地层学模拟、岩石物理、油气运移及充注史分析、提高采收率等研究工作.Email:Keyu.Liu@csiro.au
作者简介:桂丽黎, 女, 1986年9月生, 2009年获吉林大学资源勘查专业学士学位, 2012年获吉林大学沉积、矿物学专业硕士学位, 现为中国石油勘探开发研究院博士研究生, 主要从事含油气系统定量分析研究.Email:lilygui1023@126.com
基金资助:
国家重大科技专项(2011ZX05003)和中国石油天然气股份有限公司科学研究与技术开发项目(2011B-04,2011A-0207)资助.

Hydrocarbon accumulation characteristics of Hongliuquan lithologic reservoirs in south area of weatern Q aidam Basin

Gui Lili^1,2, Liu Keyu^1,2,3, Liu Shaobo^1,2, Liu Jianliang^1,2, Meng Qingyang^1,2, Yuan Li⁴, Hao Jiaqing^1,2, Wu Fan⁵

1. PetroChina Research Institute of Exploration and Development, Beijing 100083, China;
2. CNPC Key Laboratory of Basin Structure and Hydrocarbon Accumulation, Beijing 100083, China;
3. CSIRO Earth Science and Resource Engineering, Bentley P.O. Box 1130, Australia;
4. Exploration and Development Research Institute, PetroChina Qinghai Oilfield Company, Gansu Dunhuang 736202, China;
5. China United Coalbed Methane Corporation Limited, Beijing 100016, China

Received:2014-07-06 Revised:2014-11-02 Online:2015-01-25 Published:2014-12-09

摘要/Abstract

摘要：

岩性油气藏已成为中国陆上找油的重要目标,其成藏条件和过程的研究对陆相油气勘探有指导意义.柴达木盆地西部岩性油气藏的勘探尚处于起步阶段,对油气成藏过程的研究相对比较薄弱,通过对柴达木盆地西部南区的红柳泉油藏进行原油地球化学、流体包裹体和定量荧光分析,从流体演化的角度系统分析了红柳泉油藏的演化过程.研究结果表明:红柳泉下干柴沟组下部油藏原油来源于咸化湖盆母质烃源岩,为同源的低成熟度原油,原油特征一致且不存在高成熟度原油;该区发育3类油气包裹体,早期为低成熟度的黄色荧光气-液烃包裹体,晚期为高成熟度的蓝色荧光气-液烃包裹体和伴生的气包裹体.该油藏经历了干柴沟组沉积末期(约26 Ma)低成熟油充注和上油砂组沉积期(5 Ma)至今油气调整与改造成藏过程,蓝色荧光气-液烃包裹体和气烃包裹体是早期低成熟度油气沿后期构造产生的断层输导体系向上调整运移至浅层分馏与脱气的产物.

关键词: 傅立叶变换, 红外光谱, 定量颗粒荧光, 包裹体, 地球化学, 红柳泉, 柴达木盆地西部

Abstract:

Lithologic reservoirs have become the important targets of onshore oil exploration in China, and studies on their formation conditions and processes provide a guide for continental hydrocarbon exploration. Since the exploration of lighologic reservoirs in western Qaidam Basin is still in the starting stage, there are insufficient researches on hydrocarbon accumulation process. Aiming at Hongliuquan oil reservoirs in the south of western Qaidam Basin, fluid inclusion, crude-oil geochemical and quantitative fluorescent analyses were conducted in this study. On this basis, the evolutionary process of Hongliuquan oil reservoir was analyzed in terms of fluid evolution. The results show that the crude oil in the lower reservoir of Lower Ganchaigou Formation of Hongliuquan is originated from the parent source rocks of saline lacustrine basin, which is homologous low-maturity crude oil with consistent characteristics. However, there exists no high-maturity crude oil. In this region, three kinds of hydrocarbon inclusions were developed, i.e., low-maturity yellow fluorescent gas-liquid hydrocarbon inclusions in the early stage, blue fluorescent gas-liquid hydrocarbon inclusions and associated gas inclusions in the late stage. This oil reservoir underwent a formation process from low-maturity oil charging in the late sedimentary stage of Ganchaigou Formation (about 26 Ma) to the sedimentary stage of upper oil sand formation (5 Ma), till current adjustment and transformation of hydrocarbon accumulation. Blue fluorescent gas-liquid hydrocarbon inclusions and gas hydrocarbon inclusions are the products of low-maturity hydrocarbon in the early stage through fractionation and degasification in the process of adjusting and migrating upwards to shallow layer along the fault translocation system formed in the late tectonism.

Key words: Fourier transform infrared spectoscopy, quantitative grain fluores, fluid inclusion, geochemistry, Hongliuquan, western Qaidam Basin

中图分类号:

TE122.1

桂丽黎, 刘可禹, 柳少波, 刘建良, 孟庆洋, 袁莉, 郝加庆, 吴凡. 柴达木盆地西部南区红柳泉岩性油气藏成藏特征[J]. 石油学报, 2015, 36(1): 50-59.

Gui Lili, Liu Keyu, Liu Shaobo, Liu Jianliang, Meng Qingyang, Yuan Li, Hao Jiaqing, Wu Fan. Hydrocarbon accumulation characteristics of Hongliuquan lithologic reservoirs in south area of weatern Q aidam Basin[J]. Acta Petrolei Sinica, 2015, 36(1): 50-59.

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柴达木盆地西部南区红柳泉岩性油气藏成藏特征

Hydrocarbon accumulation characteristics of Hongliuquan lithologic reservoirs in south area of weatern Q aidam Basin

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