利用三维地震资料分析胜北构造带构造演化与油气聚集

Analysis of structural evolution and hydrocarbon accumulation in Shengbei Structural Zone using 3-D seismic data

1. 吐哈石油勘探开发指挥部物探公司,哈密839001;2. 成都理工学院,成都610059

Geophysica Prospecting Company, Tuha Headquarter of Oil Exploration and Development, Hami 839001

在三维地震资料解释的基础上利用时间厚度法, 详细分析了吐哈盆地台北凹陷胜北构造带主要目的层三间房组在燕山中、晚期及喜马拉雅期的构造演化特征．认为胜北2号构造是燕山期古构造, 且在喜马拉雅期继承性发育。在时间上, 构造发育与胜北次四烃源岩(J_1b-J_2x)生排烃高峰匹配良好；在空间上, 胜北2号构造长期位于生油凹陷北倾斜坡的高部位, 是油气运移的优势方向．具备燕山期、喜马拉雅期两期成藏的有利条件, 且后期保存好。胜北3号构造形成于喜马拉雅早期, 具凹中隆的特点, 其成藏期在喜马拉雅期。

Based on the interpretation of 3-D seismic data from the Shengbei Structural Zone,Taibei Depression, Tuba Basin, the authors employ the time-thickness method to analyze thestructural evolution of the main target Sanjianfang Formation in the Yenshan and Himalaya Age.It is thought that the Shengbei-2 structure is a paleostructure of Yenshan Age, developinginheritedly in Himalaya Age. Its structural development is well matched with the hydrocarbongeneration and drainage peak of the Shengbei source rocks. Spatially, the Shengbei-2 structure liesat the high position of the slope of oil-generating depression, which is a predominant direction ofhydrocarbon migration. It has a beneficial condition of forming reservoir in two ages andpreserving hydrocarbon. The Shengbei-3 structure is formed in the early Himalaya Age, locatingin the uplift area within depression. Its reservoir-forming time is during the Himalaya Age.