Evidence of fluid inclusions for the hydrocarbon charging history of Ordovician reservoirs in Yingmaili low-uplift, northern Tarim Basin

doi:10.7623/syxb201203005

Editorial office of ACTA PETROLEI SINICA ›› 2012, Vol. 33 ›› Issue (3): 372-378.DOI: 10.7623/syxb201203005

• Petroleum Exploration • Previous Articles Next Articles

Evidence of fluid inclusions for the hydrocarbon charging history of Ordovician reservoirs in Yingmaili low-uplift, northern Tarim Basin

XIAO Hui 1　ZHAO Jingzhou 1　YANG Haijun 2　CAI Zhenzhong 2　ZHANG Lijuan 2　ZHU Yongfeng 2

Received:2011-10-25 Revised:2012-01-03 Online:2012-05-25 Published:2012-07-20

塔北英买力低凸起奥陶系油藏充注历史的流体包裹体证据

肖　晖 1　赵靖舟 1　杨海军 2　蔡振忠 2　张丽娟 2　朱永峰 2

1 西安石油大学油气资源学院　陕西西安　710065； 2 中国石油塔里木油田公司勘探开发研究院　新疆库尔勒　841000

通讯作者: 肖　晖
作者简介:肖　晖，男，1980年5月生，2008年获西北大学地质学博士学位，现为西安石油大学油气资源学院讲师，主要从事盆地构造热演化史及成藏地质学研究。
基金资助:
国家自然科学基金项目（No.41102082和No.41002052）、国家重大科技专项（2008ZX05005-004-08HZ）资助。

Abstract

Abstract:

Combined with analysis of thermoevolutionary burial history, we determined hydrocarbon charge phases of the YM1 and YM2 Ordovician oil reservoirs in the Yingmaili low-uplift of the Tarim Basin through microscopic observations of petrography, polarized-light and fluorescence as well as measurements of homogenization temperature and Fourier transform infrared spectroscopy (FTIR) on fluid inclusions. The result showed that four types of hydrocarbon inclusions were recognized and liquid hydrocarbon inclusions could be further divided into two subclasses: heavy-oil inclusions and medium-light oil inclusions based on their petrographic characteristics. The generation order of hydrocarbon inclusions was determined according to the relation between mineral diagenesis and distributions of hydrocarbon inclusions and the peak distributions of homogenization temperature ranged in 66.7~72.5℃ and 86.4~95.3℃, respectively, suggesting the occurrence of two main phases for oil migration and accumulation. Characteristics of infrared spectra of oil inclusions and their calculated parameters indicated that the early charged oil with brown and yellow-brown fluorescent light had a relatively lower maturity while the late charged oil with yellow-white to blue-green fluorescent light showed a relatively higher maturity. The early and late phases of hydrocarbon charge were determined to correspond to Late Caledonian and Late Hercynian, respectively, by reconstructing the thermal burial history of deposits in the Yingmaili low-uplift. Comprehensive analyses of reservoir bitumen and present oil density data implied that the reservoir degradation occurred mainly in Early Hercynian while a critical moment of the major petroleum charge emerged in Late Hercynian.

Key words: Tarim Basin, Yingmaili area, fluid inclusion, charge phase, Fourier transform infrared spectroscopy (FTIR)

摘要：

通过流体包裹体偏光—荧光镜下观察、均一温度测试、红外光谱等分析手段，结合埋藏热演化史分析，确定了塔北隆起西部英买力低凸起奥陶系油藏充注期次。奥陶系储层共发育4类烃类包裹体，根据荧光颜色对液烃包裹体进一步划分为重质油包裹体和中-轻质油包裹体；根据包裹体岩相学特征将烃类包裹体分为早、晚两期，均一温度峰值分别为66.7~72.5℃和86.4~95.3℃，表明主要发生过两期原油运移、充注过程。石油包裹体红外光谱特征及参数计算结果表明，早期充注原油成熟度较低，烃类包裹体主要发褐色、黄褐色荧光；晚期充注原油成熟度相对较高，烃类包裹体显示黄白—蓝绿色荧光。包裹体均一温度结合埋藏热演化史确定早、晚两期原油充注过程分别对应于晚加里东期和晚海西期。根据油藏沥青特征和现今油藏原油密度等综合因素分析认为，油藏降解过程主要发生在早海西期，而晚海西期是主成藏期。

关键词: 塔里木盆地, 英买力地区, 流体包裹体, 充注期次, 红外光谱

XIAO Hui　ZHAO Jingzhou　YANG Haijun　CAI Zhenzhong　ZHANG Lijuan　ZHU Yongfeng. Evidence of fluid inclusions for the hydrocarbon charging history of Ordovician reservoirs in Yingmaili low-uplift, northern Tarim Basin[J]. Editorial office of ACTA PETROLEI SINICA, 2012, 33(3): 372-378.

肖　晖　赵靖舟　杨海军　蔡振忠　张丽娟　朱永峰. 塔北英买力低凸起奥陶系油藏充注历史的流体包裹体证据[J]. 石油学报, 2012, 33(3): 372-378.

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Evidence of fluid inclusions for the hydrocarbon charging history of Ordovician reservoirs in Yingmaili low-uplift, northern Tarim Basin

塔北英买力低凸起奥陶系油藏充注历史的流体包裹体证据

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