四川盆地川西坳陷东坡沙溪庙组油气成藏关键时刻研究

发布时间：2018-05-23 10:47

本文选题：流体包裹体 + 均一温度　；参考：《石油实验地质》2017年01期

【摘要】：四川盆地川西坳陷是印支期以来龙门山挤压推覆所形成的前陆盆地,中段东坡地区包含合兴场—高庙子、丰谷、永太、中江—回龙和知新场—石泉场共计5个三维地震勘探区块,涉及3个构造区带。通过研究烃源岩生烃演化史并对研究区6口井22块流体包裹体样品进行荧光观察、显微测温、测盐等系统分析,结果表明:上三叠统须家河组五段烃源岩于151~145 Ma进入生烃门限,130 Ma达到生烃高峰;研究区侏罗系沙溪庙组砂岩储层发生过3期与油气成藏有关的流体活动,分别发生在距今141~128 Ma(J_3-K_1),105~88 Ma(K_1-K_2),83~68 Ma(K_2),成藏关键时刻主要在烃源岩的生烃高峰期130~68 Ma(K_1-K_2)。
[Abstract]:Sichuan Basin West Sichuan Depression is a Foreland basin formed by the compression and nappe of Longmen Mountain since Indosinian period. The east slope area of the middle section contains Hexingchang-Gaomiaozi, Fenggu, Yongtai, etc. There are five 3D seismic exploration blocks in Zhongjiang Huilong and Zhixinchang-Shi Quan fields involving three tectonic zones. Based on the study of hydrocarbon generation evolution history of source rock and the systematic analysis of 22 fluid inclusion samples from 6 wells in the study area, such as fluorescence observation, microthermometry, salt measurement, etc. The results show that the source rocks of the fifth member of the Xujiahe formation of the Upper Triassic reached the peak of hydrocarbon generation at 151- 145Ma entering the hydrocarbon generation threshold of 130Ma, and the sandstone reservoir of Shaximiao formation of Jurassic system occurred fluid activity related to oil and gas accumulation in three periods in the study area. Respectively, at 141T 128MaS J3-KS / T / 88 / 88 Ma-K1-K _ 2S / T _ 1 / K _ 1-K _ 2S / T _ 1 / T _ 1-K _ 2 / T _ 1 / T _ 1 / T _ 1 / K _ 2 respectively, the key time of reservoir formation is mainly at the peak of hydrocarbon generation of source rocks, 130m ~ 68 Mai K _ 1-K _ 2S _ 2.
【作者单位】：长江大学油气资源与勘探技术教育部重点实验室;长江大学地球科学学院;中国石油大港油田分公司第二采油厂;
【基金】：国家科技重大专项“海相碳酸盐岩油气资源潜力与大油气田形成条件、分布规律研究”(2011ZX05004-001)资助
【分类号】：P618.13

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