VSP技术在牛74块滚动勘探中的应用

牛居油田是辽河坳陷内的一个富油区,具有30多年的勘探开发历程,牛74块是典型的岩性—构造油藏,在复杂断块滚动勘探研究过程中,充分运用新技术、新手段、新方法,不断认识该区的构造、储层及油气成藏规律,但随着牛74块开发程度的不断提高,滚动扩边的难度越来越大。牛74块目的层地震反射层的层位标定不准,周边断层的位置、走向等因素直接影响到滚动扩边成效,运用VSP测井技术,可以从不同方向地震测线上落实断层的走向和方位,进而证实圈闭落实程度。通过在牛74块实施VSP方法结果的应用,加强了地震资料的精细解释,确定断层是否存在或其确切位置,准确落实构造形态和断层展布,为牛74块滚动扩边提供可靠地科学依据。

APPLICATION OF VSP TECHNOLOGY IN CONTINUED EXPLORATION IN NIU-74 BLOCK

 Niuju oilfield as a sub sag in Liaohe basin is abundant in oil with over 30-year’s exploration history. Niu-74 block is a typical litho-structural reservoir, which has been continuously explored via new technologies, means, and methods and has been better understood in its structure, reservoir and oil-gas formation rules. As it is explored on, it becomes more difficult to extend its margin. The seismic reflection layer which can not be set up correctly, and faults are two major factors. This paper applies VSP technology to locate the strike and dipping of faults from seismic exploration lines, and verifies the extent of traps. This application enhances a high-solution explanation of seismic data, reveals the existence and location of faults and describes the structural morphology and faults, providing a reference for continued exploration in Niu-74 block.