西西伯利亚含油气盆地大型油气田分布的构造控制因素

Structure Controlling Factors of Oil-Gas Field Distribution in Giant Petroliferous Basins in West Siberian Province

50多年来,许多研究者都在研究控制西西伯利亚含油气盆地油气分布的构造因素。М.Я.鲁德凯维奇、Ф.Г.古拉里、А.Э.库特罗维奇等曾对这一问题进行了详细研究。他们认为, 油田分布在新构造运动沉降区或很弱隆起区,而气田分布在较微弱的隆起带; 大型油气田分布与组成1级隆起的构造圈闭有关。长期稳定沉降的大型盆地和坳陷是生油气带; 原油聚集带分布在含油气盆地中部和较低部位, 天然气聚集带分布在盆地边缘。西西伯利亚含油气省共有巨型和大型油气田249个, 其油气储量占了含油气省总储量的90%以上。将西西伯利亚含油气省划分为3个区域性大地构造单元: 外带、亚马尔半岛- 喀拉区域沉降带和鄂毕区域阶地。后两个构造单元组成了台向斜的内带。在这些构造单元中分布着大型和巨型油气田。详细研究了这3个大地构造单元的巨型和大型油气田及其储量。

The structure controlling factors of oil-gas distribution in giant petroliferous basins in West Siberian province were studied in detail by many scholars for over 50 years. M. Ya. Ludekaivich, F. G. Gulali, A. Ai. Kutelovich, et al. point out that the distribution of oilgas fields is related to the depressed areas or to uplift structural traps after neotectonic movement. The giant basins and depressions during long period of stable settlement are the areas for hydrocarbon generation, where the oil accumulations are in the mid and lower positions of the basins, while the gas ones in the margin of the basins. There exist 249 giant and large oil-gas fields in West Siberian province, with over 90% reserves of the total. The province is divided into three regionally geotectonic units, such as external belt, Yamarmi island-Kala regional depressed belt and Ebi regional terrace. The latter two units make up of the internal belt. The large and giant oil-gas fields found are all in these units. Also, these oil-gas fields and their reserves within the geotectonic units are researched in detail.