岩性油气藏 ›› 2021, Vol. 33 ›› Issue (6): 39–47.doi: 10.12108/yxyqc.20210605

• 油气地质 • 上一篇    下一篇

鄂尔多斯盆地中南部侏罗系直罗组流体包裹体特征

杨水胜1, 王汇智1, 闫骁龙1, 付国民2   

  1. 1. 延长油田股份有限公司 勘探开发技术研究中心, 陕西 延安 716000;
    2. 长安大学 地球科学与资源学院, 西安 710045
  • 收稿日期:2021-04-20 修回日期:2021-07-07 出版日期:2021-12-01 发布日期:2021-11-25
  • 第一作者:杨水胜(1993-),男,硕士,主要从事油田地质与开发工作。地址:(716000)陕西省延安市宝塔区李渠镇崖里坪延长油田研究中心。Email:1160670234@qq.com。
  • 基金资助:
    国家自然科学基金项目“盐度响应型水包稠油乳状液的构建及其在多孔介质中的运移行为研究”（编号：51804036）资助

Characteristics and indication of fluid inclusions of Jurassic Zhiluo Formation in south-central Ordos Basin

YANG Shuisheng1, WANG Huizhi1, YAN Xiaolong1, FU Guomin2   

  1. 1. Research Center of Exploration and Development Technology, Yanchang Oilfield Co., Ltd., Yan'an 716000, Shaanxi, China;
    2. School of Earth Science and Resources, Chang'an University, Xi'an 710045, China
  • Received:2021-04-20 Revised:2021-07-07 Online:2021-12-01 Published:2021-11-25

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摘要： 为了明确鄂尔多斯盆地中南部侏罗系直罗组流体包裹体特征及其指示意义，利用包裹体显微测温、显微荧光，结合埋藏史和热演化史模拟进行分析。结果表明：研究区直罗组主要发育2期油气包裹体，早期油气包裹体主要分布在石英颗粒表面溶蚀孔、石英早期裂隙，成熟度低，发橘黄色—黄绿色荧光，同期盐水包裹体均一温度为250～320 ℃；晚期油气包裹体主要分布在石英晚期裂隙中，成熟度高，发暗绿色荧光，测得同期盐水包裹体均一温度为120～180 ℃。结合埋藏史-热演化史研究，包裹体均一温度高于地层温度，分布范围大且2期温度间断明显，推测直罗组油气运聚成藏受构造热事件影响，是一个相对漫长且不连续的过程。研究成果对直罗组成藏机理研究及其油气勘探具有重要意义。

关键词: 流体包裹体, 均一温度, 成岩演化, 油气充注, 直罗组, 鄂尔多斯盆地

Abstract: In order to clarify the characteristics of fluid inclusions and their indication of Jurassic Zhiluo Formation in south-central Ordos Basin, micro thermometry, micro fluorescence, burial history and thermal history simulation of inclusions were applied to carry out the analysis. The results show that there are mainly two stages of oil and gas inclusions in Zhiluo Formation in the study area. The early stage of oil and gas inclusions are mainly distributed in dissolved pores on the surface of quartz particles and the early fractures of quartz, with low maturity and orange-yellow-green fluorescence. The homogenization temperature of brine inclusions in the same period ranges from 250 ℃ to 320 ℃. The late stage of oil and gas inclusions are mainly distributed in the late quartz fractures, with high maturity and dark green fluorescence. The homogenization temperature of brine inclusions in the same period is 120-180 ℃. Combined with the study of burial history and thermal history, the homogenization temperature of inclusions is higher than the formation temperature, the distribution range is large, and the temperature discontinuity is obvious in the two stages. It is speculated that the oil and gas migration and accumulation in Zhiluo Formation are affected by tectonic thermal events, which is a relatively long and discontinuous process. The research results are of great significance to the study of reservoir forming mechanism of Zhiluo Formation and are important to the further breakthroughs of oil and gas exploration in the study area.

Key words: fluid inclusions, homogenization temperature, diagenetic evolution, hydrocarbon charging, Zhiluo Formation, Ordos Basin

中图分类号: 

  • TE122.1
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