全球前寒武—寒武系含油气盆地石油地质特征及成藏主控因素

发布时间：2018-06-20 14:15

本文选题：前寒武—寒武系 + 阿曼盆地　；参考：《吉林大学学报(地球科学版)》2017年04期

【摘要】：前寒武—寒武系油气作为我国中西部含油气盆地未来油气勘探的重要接替领域,近年来受到广泛关注。本文以阿曼和东西伯利亚盆地为例,阐述全球典型前寒武—寒武系古老含油气盆地石油地质特征及成藏主控因素,为国内前寒武—寒武系油气勘探取得进一步突破提供参考。阿曼和东西伯利亚盆地烃源岩主要发育在盆地初始裂陷作用区,受埋深及地温梯度控制,在志留纪或泥盆纪之前就已大量生油;储集层岩性以砂岩为主,分布面积广,受表生风化淋滤、胶结物溶蚀及构造裂缝改造等后期作用影响,可形成优质区域性储层;优质的区域性盖层是前寒武—寒武系古老油气藏得以保存的关键性因素,盆地膏盐岩累计厚度都超过1 000m。塔里木盆地寒武系盐下深层含油气层系,同国外古老含油气盆地相比,同样具有多套高丰度优质烃源岩生烃、厚层区域性膏盐岩封堵及长距离运移、多层系成藏特征,具有良好的油气勘探潜力。
[Abstract]:Precambrian Cambrian oil and gas, as an important replacement field of hydrocarbon exploration in hydrocarbon bearing basins in central and western China, has received extensive attention in recent years. Taking the Omani and East Siberian basins as examples, this paper expounds the petroleum geological characteristics and the main factors of reservoir formation in typical Precambrian-Cambrian ancient petroliferous basins in the world, which provides a reference for further breakthrough in Precambrian-Cambrian oil and gas exploration in China. The source rocks of Oman and East Siberian basins are mainly developed in the initial rift area of the basin, which are controlled by burial depth and geothermal gradient, and have produced a large amount of oil before Silurian or Devonian, and the reservoir lithology is dominated by sandstone with a wide distribution area. Affected by the late action of epigenetic weathering and leaching, cement dissolution and structural fracture transformation, high-quality regional reservoirs can be formed, and high quality regional caprocks are the key factors for the preservation of Precambrian-Cambrian ancient reservoirs. The accumulative thickness of gypsum salt rock in the basin is more than 1 000 m. Compared with the ancient oil and gas bearing basins of foreign countries, the Cambrian deep oil and gas bearing system of Tarim Basin also has many sets of high abundance and high quality hydrocarbon source rock generation, thick layer regional gypsum salt rock plugging and long distance migration, and multi-layer reservoir forming characteristics. It has good oil and gas exploration potential.
【作者单位】：中国石化勘探南方分公司勘探研究院;中国石油勘探开发研究院;中国石油大学(北京)地球科学学院;
【基金】：国家科技重大专项(2011ZX05004)~~
【分类号】：P618.13

【相似文献】