利用时移地震资料划分油藏流体流动单元的可行性分析

Feasibility analysis on division of flow units using time-lapse seismic data

油田开发过程中,油层内部流体渗流所引起的含油饱和度、流体压力变化以及原油脱气均可导致时移地震资料的差异振幅.时移地震资料可以揭示油层内部渗流的影响,为划分油藏流体流动单元提供依据,根据差异振幅的幅度及范围可以确定流动单元的品质及范围,并且油层内部的渗流影响发生在同一流动单元之内.本文从理论上分析并证明了该方法的可行性.

Fluid flow of oil-bed results in changes such as oil saturation reducing and fluid pressure decreasing or gas-free during oil field production. These changes lead to different responses of time-lapse seismic data. These data can reveal fluid flow, and offer evidence to divide the fluid flow units in oil-bed, The size and extension of differential amplitude can be used to determine the quality and range of fluid flow units, and fluid flows in the same unit. We have analyzed and proved theoretically the feasibility of using time-lapse seismic to divide flow units.