滨里海盆地盐下层系的油气地质特征

对滨里海盆地盐下层系的地层与沉积以及石油地质等特征进行了综合研究,抓住了盐下层系储集体发育与分布这一油气成藏的关键,并通过对已发现的油气田(藏)的特点和分布规律分析,认为在盐下层系中,卡腊通—田吉兹隆起区和北里海—阿兹吉尔隆起区为有利勘探目标区;盆地东部延别克—扎尔卡梅斯和扎纳若尔地区为较为有利勘探目标区;盆地西部和西南部的阿斯特拉罕—阿克纠宾斯克隆起带的西南坡和西坡以及盆地西北部的乌津地区为具有一定勘探潜力目标区。

PETROLEUM GEOLOGY OF PRE-SALT SEDIMENTS IN THE PRE-CASPIAN BASIN

An integrated study on lithology, sedimentology and petroleum geology of Pre-Salt Sediments in the Pre-Caspian Basin are carried out in this paper. The key point of oil and gas reservoir formation and distribution in the Pre-Salt Sediments is recognized. By analysis of characters and distribution patterns ofthe found hydrocarbon pools, it is suggested that the Pre-Salt Sediments in Kraton-Tengiz Uplift and North Caspian-Azigiar Uplift are the favorable areas for petroleum exploration, fol-lowed by Yenbek-Zharkames and Zhanazhol areas (eastern part of the basin), and the southwestern and western slopes of the Astrakhan-Oktyabrsk Uplift zone (the western and southwest-ern parts of the basin), as well as Uzensk area (the northwest-ern basin) are of certain potential for petroleum exploration as well.