单体油气包裹体激光剥蚀在线成分分析技术——以塔河油田奥陶系储层为例

doi:10.7623/syxb201602005

石油学报 ›› 2016, Vol. 37 ›› Issue (2): 196-206.DOI: 10.7623/syxb201602005

单体油气包裹体激光剥蚀在线成分分析技术——以塔河油田奥陶系储层为例

施伟军, 席斌斌, 秦建中, 蒋宏

中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所江苏无锡 214151

收稿日期:2015-06-26 修回日期:2015-12-09 出版日期:2016-02-25 发布日期:2016-03-11
通讯作者: 施伟军,女,1964年6月生,1986年获南京大学矿物岩石学专业学士学位,现为中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所高级工程师,主要从事油气包裹体实验技术开发与地质综合应用研究。Email:shiwj.syky@sinopec.com
作者简介:施伟军,女,1964年6月生,1986年获南京大学矿物岩石学专业学士学位,现为中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所高级工程师,主要从事油气包裹体实验技术开发与地质综合应用研究。Email:shiwj.syky@sinopec.com
基金资助:
中国石油化工股份有限公司科技攻关项目(P06002、P09058、P10027)资助。

Online laser ablation compositional analysis technique for single hydrocarbon inclusion:a case study of the Ordovician reservoirs in Tahe oilfield, Tarim Basin, NW China

Shi Weijun, Xi Binbin, Qin Jianzhong, Jiang Hong

Wuxi Institute of Petroleum Geology, Sinopec Research Institute of Petroleum Exploration and Production, Jiangsu Wuxi 214151, China

Received:2015-06-26 Revised:2015-12-09 Online:2016-02-25 Published:2016-03-11

摘要/Abstract

摘要：

单个油气包裹体成分分析是获得单期次油气充注成分信息的一个重要手段,也是石油地质地球化学领域的世界性难题。利用193 nm准分子激光可以有效剥蚀单个油气包裹体,释放未变化的成分,且富集后高效传输实现了色谱-质谱成分分析。该方法能够检测出单体油气包裹体的分子成分,其化合物种类包括从气态烃类到重质烷烃类组分(C₄-C₃₀₊),从饱和烃组分到单环、双环和三环芳烃化合物,从分子尺度直观反映了单体包裹体烃的来源及成熟度等地球化学特征。利用岩相学和地球化学综合手段分析了塔河油田奥陶系储层不同荧光油气包裹体,确定其分别捕获了不同来源的早期中质原油及晚期轻质原油。通过计算包裹体古压力并结合埋藏史研究判断研究区发生2期主要的油气充注:海西晚期和喜马拉雅期。单体油气包裹体成分分析技术的重要突破为复杂叠合盆地油气溯源及成藏期次研究提供了更加准确的手段。

关键词: 油气包裹体, 激光剥蚀-色谱-质谱在线分析, 古压力模拟, 塔河油田, 多期次油气充注

Abstract:

The compositional analysis of single hydrocarbon inclusion is not only an important means to acquire the composition information of single-phase hydrocarbon filling, but also a world-wide problem in petroleum geological and geochemical field. The 193 nm excimer laser is able to effectively ablate single hydrocarbon inclusion and release unaltered compositions. Meanwhile, the effective propagation after enrichment helps achieve GC-MS compositional analysis. This method can be used to detect molecular compositions of the single hydrocarbon inclusion with multiple types of compounds including gaseous hydrocarbons-heavy alkanes(C₄-C₃₀₊) and saturated hydrocarbons-mono-, bi-and tri-aromatics, intuitively reflecting the source, maturity and other geochemical characteristics of single inclusion hydrocarbon in terms of molecule. Different fluorescence hydrocarbon inclusions in the Ordovician reservoirs of Tahe oilfield are analyzed comprehensively using the petrographical and geochemistrical methods, which have been confirmed to capture the early medium oil and late light oil with different sources respectively. Based on the calculation of the inclusion paleopressure in combination with burial history research, two major stages of hydrocarbon filling in the study area are determined, i.e., Late Hercynian and Himalayan. The great breakthrough in the compositional analysis techniques of single hydrocarbon inclusion provide more accurate means for studying the hydrocarbon source traceability and accumulation stages in complex superimposed basins.

Key words: hydrocarbon inclusion, online LA-GC-MS analysis, paleopressure simulation, Tahe oilfield, multi-stage hydrocarbon filling

中图分类号:

TE122.2

施伟军, 席斌斌, 秦建中, 蒋宏. 单体油气包裹体激光剥蚀在线成分分析技术——以塔河油田奥陶系储层为例[J]. 石油学报, 2016, 37(2): 196-206.

Shi Weijun, Xi Binbin, Qin Jianzhong, Jiang Hong. Online laser ablation compositional analysis technique for single hydrocarbon inclusion:a case study of the Ordovician reservoirs in Tahe oilfield, Tarim Basin, NW China[J]. Acta Petrolei Sinica, 2016, 37(2): 196-206.

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单体油气包裹体激光剥蚀在线成分分析技术——以塔河油田奥陶系储层为例

Online laser ablation compositional analysis technique for single hydrocarbon inclusion:a case study of the Ordovician reservoirs in Tahe oilfield, Tarim Basin, NW China

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