吐哈盆地台北凹陷葡萄沟地区岩性油气藏勘探技术及效果分析

吐哈盆地台北凹陷葡萄沟地区受后期构造活动掀斜作用的改造,形成了岩性油气藏的构造背景。葡萄沟地区中侏罗统主要目的层砂、泥岩纵向上薄互层分布及横向上相变急剧的展布格局,砂、泥岩波阻抗分异能力差等因素,使该区岩性圈闭预测十分困难。在油气勘探的过程中,以层序地层学和沉积微相研究为基础,采用岩性测井曲线重构反演、地震属性分析、地震子波吸收分析、平点等技术手段,有效地预测并评价了岩性圈闭及油气藏的发育条件。经近几年的勘探技术攻关,发现了葡萄沟地区构造—岩性油气藏富集带。

Exploration Technology of Lithologic Reservoir in Putaogou Zone in Taibei Sag in Turpan-Hami Basin and Its Effect Analysis

The Taibei sag is changed by the tilting action of late structural movement, so the structure of lithologic reservoir is formed. The prediction of lithologic traps gets very difficult due to the vertical distribution of thin interbeded layers of sandstone and mudstone which are the major target strata in middle Jurassic formation of Putaogou zone, the sharp horizontal phase change, and the small difference of wave impedance characteristics between sandstone and mudstone. This paper makes an effective predic...