油气藏开发监测中地-井三维电磁法的数值模拟研究

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摘要在油气田开采的中后期，油气藏动态监测与剩余油气的探测是至关重要的问题。基于地层流体含油气饱和度的变化将导致电阻率差异这一机理，提出多场源多方位地-井垂直电磁剖面法。根据油气藏及其开采过程设计了油气藏动态开发四个进程，采用积分方程方法模拟了多方位、多场源地-井垂直电磁剖面法在油气藏注水开采进程中油气储层电阻率和含油饱和度动态变化的电磁响应特征。通过不同方位地-井电磁场异常强度及形态变化来指示注水开采进程。数值模拟结果表明：该方法可有效监测油气动态变化过程，指示剩余油分布、注水水淹进程。

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关键词：油气藏开发多方位监测地井垂直电磁剖面三维积分方程模拟

Abstract： Dynamic exploration for oil and gas requires careful monitoring of reservoir contents for safety and efficiency of oil extraction. This paper proposes a multi-source and multi-azimuth walk-around vertical electromagnetic profiling (MM-VEP) technique for surface-to-borehole electromagnetic surveying. Based on the difference in conductivities between reservoirs with different concentrations of oil and water, MM-VEP can be used to monitor reservoirs as they are injected with water. The MM-VEP response in five azimuth planes is modeled with three-dimensional (3D) integral equation calculations. The progress of waterflooding in four stages for enhanced oil recovery is shown to be indicated by field anomalies MM-VEP caused by variations in the reservoir resistivity. Numerical modeling demonstrates that MM-VEP measurements provides enough quantitative information from an underground reservoir to accurately detect oil deposits and monitor the progress of waterflooding.

Key words： Reservoir detecting multi-azimuth MM-VEP integral equation method

收稿日期: 2017-03-13;

基金资助:

本研究项目由国家重大专项课题（编号：2011ZX05019-007）、国家自然科学基金（编号：41604097）、国家博士后科学基金（编号：2016M592611）和桂林理工大学科研启动基金（编号：002401003503和002401003514）联合资助。

引用本文:

. 油气藏开发监测中地-井三维电磁法的数值模拟研究[J]. 应用地球物理, 2017, 14(4): 559-569.

. Three-dimensional numerical modeling of surface-to-borehole electromagnetic method for monitoring reservoir[J]. APPLIED GEOPHYSICS, 2017, 14(4): 559-569.

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