The Linxing area is located in the north of the eastern margin of the Ordos Basin, which has great resource potential for tight gas. In this paper, fluid inclusion analysis and basin modeling are the main means to clarify the gas accumulation mechanism of the Upper Paleozoic in the Linxing area. Petrographic analysis shows that fluid inclusions can be classified into 5 types: aqueous inclusions, hydrocarbon-bearing aqueous inclusions, hydrocarbon inclusions, crystal-bearing aqueous inclusions, and aqueous-carbonic inclusions. According to the statistical analysis of homogenization temperature and salinity of fluid inclusions, combined with the burial-thermal evolution, the study area was divided into 3 areas: the inner-magma baking area, the middle-anomal thermal area, and the outer-normal thermal area. The gas accumulation characteristics are differences among the 3 areas, the closer to Zijinshan magmatic pluton, the earlier gas accumulation period; and the vertical gas accumulation in the inner-magma baking area and the middle-anomal thermal area was not a slow and gradual process from bottom to top. The period from the Middle Jurassic to the Early Cretaceous is the key period for rapid pressure accumulation in the Upper Paleozoic reservoirs, which is consistent with the period of natural gas accumulation. The area near the Zijinshan magmatic pluton was the high fluid potential area during the gas accumulation period, which indicates that natural gas and other fluids migrated from Zijinshan magmatic pluton to the surrounding area. It is concluded that in the Linxing area, the Zijinshan magmatic pluton had a significant impact on natural gas accumulation, and the natural gas accumulation model under the control of magmatic thermal-tectonic effect was proposed.

中文翻译：

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鄂尔多斯盆地临兴地区天然气成藏特征——流体包裹体与盆地模拟综合研究揭示

临兴地区位于鄂尔多斯盆地东缘北部，致密气资源潜力巨大。本文主要通过流体包裹体分析和盆地模拟来阐明临兴地区上古生界天然气成藏机制。岩相分析表明，流体包裹体可分为含水包裹体、含烃含水包裹体、烃类包裹体、含晶体含水包裹体和含水碳包裹体5种类型。根据流体包裹体均一化温度和盐度统计分析，结合埋藏热演化，将研究区划分为3个区域：内岩浆焙烧区、中异常热区和外常温区。热区。3个地区的成藏特征存在差异，越接近紫金山岩浆岩体，成藏期越早；内岩浆焙烧区和中异常热区的垂直气藏自下而上并不是一个缓慢渐进的过程。中侏罗世至早白垩世是上古生界储层压力快速聚集的关键时期，与天然气成藏时期相吻合。紫金山岩浆岩体附近为气藏期高流体势区，表明天然气等流体从紫金山岩浆岩体运移至周边地区。得出的结论是，在临兴地区，