渤海P油田注水井储层伤害因素室内研究

Indoor Research of Injection Well Reservoir Damage Factors in Bohai P Oilfield

摘要: 渤海P油田注水井存在的主要问题是注水压力升高块，注水困难，整体注采比偏低，地层亏空严重，采出程度偏低。针对渤海P油田注水井的主要问题，开展了注水伤害机理研究。首先运用油藏工程的方法定量分析注水对储层的伤害程度，然后利用岩心流动实验分别验证注水水质、注入水结垢、粘土水化膨胀等因素对注水堵塞的影响，最终确定注水伤害的主要因素，为后期开展针对性的降压增注措施提供依据。

Abstract: For the Bohai P oilfield, the existing main problems are high water injection pressure, water injection difficulty, low injection-production ratio, formation depletion and low recovery degree. In view of the main problems, the research of water injection damage mechanism was carried out. First the reservoir engineering method was to analyze the water flooding damage degree. Then the core flow experiment was performed to validate the influence of water quality, water scaling, clay swelling, and the “cold damage” on the water injection block. Eventually the main damage factors were determined. It provides important guidance for the development of targeted pressure reduction injection measures in the later stage.