二连盆地阿南凹陷致密油勘探潜力分析

对二连盆地阿南凹陷的致密油形成条件进行分析,表明阿南凹陷致密储层发育,其中腾一下段发育的特殊岩性段具有分布面积大、储层物性普遍差的特点。它与湖相暗色泥岩互层有机配置,呈层状连续分布,具备良好的致密油形成条件,可形成源储一体,油气运移距离短的致密油藏。通过对有利区带进行综合评价,认为构造翼部是较为有利的勘探区域。在此区域优选井位进行初步勘探,取得了一定效果,阿南凹陷具有较大的致密油勘探潜力,值得进一步探索。

Analysis of the exploration potential of tight oil in Anan Sag,Erlian Basin

By analyzing the forming conditions of tight oil reservoir in Anan Sag of Erlian Basin, it was shown that the tight reservoirs were developed in Anan Sag,in which the special lithologic section developed at the lower of Tengl member had a large distribution area and poor reservoir physical property. It was configured organically with the lacustrine dark mudstone interbedding, forming a layered continuous distribution, and had good forming conditions of tight oil. It can form the tight oil reservoir with source in reservoir, and short oil - gas migration distance. Through comprehensive evaluation, it was considered that the tectonic wings were the favorable exploration regions. Preliminary exploration was carried out in the area and has obtained certain results, showing that Anan Sag has large exploration potential of tight oil, and is worth for fur- ther exploration.