含沥青重晶石结核的发现及研究

Discovery and Study of the Asphalt-bearing Barite Nodules in the Western Area of Tarim Basin

本文对新疆塔里木盆地西缘的阿克苏地区肖尔布拉克附近的下寒武统底部海相地层内发现的重晶石结核中的沥青进行了研究。该重晶石结核可分同生结核和成岩结核两种。结核的抽提沥青,贫饱和烃而富芳香烃和硫,是由下寒武统地层中自生自储的原油衍生而来的储层沥青。含沥青重晶石结核的发现及对结核中沥青的分布和沥青化学性质的初步研究。为在塔里木盆地寻找与下寒武统有关的石油与天然气提供了有价值的新线索。

Asphalt-bearing barite nodules were discovered in the marine deposit of the bottom of Lower Cambrian formation in the western margin of Tarim Basin located in the Xiorbrag area, Arksu. Xinjiang. A preliminary investigation has been made an the characteristics and distribution of asphalt in the barite nodules. The barite nodules might be divided into syngenetic and diagenetic nodules. The asphalt is a reservoir asphalt derived from the autogenous oil trapped in Lower Cambrian formation itself. The discovery and preliminary investigation of asphalt-bearing barite nodules provide new, direct and voluable leads for exploring oil and gas in the Lower Cambrian formation in Tarim Basin.