川西坳陷上三叠统须家河组的流体包裹体均一温度研究
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摘要
川西坳陷上三叠统须家河组发育致密砂岩气藏,对于其成藏温度和时间存在较大争议。而流体包裹体技术是研究油气成藏特征的最直接有效的技术,因此本文采用流体包裹体的均一温度研究成藏温度和时间。利用偏光显微镜和冷热台对样品进行了分析测试,认为须二段成藏温度主要为95-109℃;须三段成藏温度主要为85℃-114℃;须四段成藏温度主要为90℃-104℃。结合该区地层埋藏史—热史,认为须二段成藏时间为在晚三叠世-中侏罗世,须三段主要成藏时间中侏罗世-晚侏罗世;须四段主要成藏时间在晚侏罗世。本研究为研究区致密砂岩气藏的成藏温度和时间研究提供了新的视角。
Tight sandstone gas reservoir are developed in the Xujiahe Formation Reservoirs of Western Sichuan Depression. However, its accumulation temperature and time are confused to geologists. Fluid inclusion is the most direct and effective tool to study the accumulation characteristics. Thus, fluid inclusion is used to research the accumulation temperature and time. With the polarized light microscopy and hot and cold machine, the main accumulation temperature of T3x2 is 95-109℃. The main accumulation temperature of T3x3 is 85℃-114℃. The main accumulation temperature of T3x4 is 90℃-104℃. Based on the buried-thermal history, the main accumulation time of T3x2 is Late Triassic-middle Jurassic. The main accumulation time of T3x3 is middle Jurassic-Late Jurassic. The main accumulation time of T3x4 is Late Jurassic. This study provides a new perspective for the study of accumulation temperature and time of tight sandstone gas reservoirs in the study area.
Tight sandstone gas reservoir are developed in the Xujiahe Formation Reservoirs of Western Sichuan Depression. However, its accumulation temperature and time are confused to geologists. Fluid inclusion is the most direct and effective tool to study the accumulation characteristics. Thus, fluid inclusion is used to research the accumulation temperature and time. With the polarized light microscopy and hot and cold machine, the main accumulation temperature of T3x2 is 95-109℃. The main accumulation temperature of T3x3 is 85℃-114℃. The main accumulation temperature of T3x4 is 90℃-104℃. Based on the buried-thermal history, the main accumulation time of T3x2 is Late Triassic-middle Jurassic. The main accumulation time of T3x3 is middle Jurassic-Late Jurassic. The main accumulation time of T3x4 is Late Jurassic. This study provides a new perspective for the study of accumulation temperature and time of tight sandstone gas reservoirs in the study area.
引文
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[7]朱如凯,邹才能,张鼐,等.致密砂岩气藏储层成岩流体演化与致密成因机理—以四川盆地上三叠统须家河组为例[J].中国科学D辑:地球科学. 2009, 39(3):327-339.
[2]李明诚,单秀琴,马成华,等.油气成藏期探讨.新疆石油地质.2005,26(5):587-591.
[3]刘文斌,姚素平,胡文蠧,等.流体包裹体的研究方法及应用.新疆石油地质. 2003,24(3):264-267.
[4]王先彬,刘刚,陈践发,等.地球内部流体研究的若干关键问题.地学前缘(中国地质大学,北京). 1996,3(3-4):105-118.
[5]赵靖舟.油气包裹体在成藏年代学研究中的应用实例分析.地质地球化学. 2002, 30(2):83-89.
[6]周慧,郗爱华,熊益学,等.流体包裹体的研究进展.矿物学报. 2013, 33(1):92-100.
[7]朱如凯,邹才能,张鼐,等.致密砂岩气藏储层成岩流体演化与致密成因机理—以四川盆地上三叠统须家河组为例[J].中国科学D辑:地球科学. 2009, 39(3):327-339.