注水井层间无干扰测试技术探讨

Discussion about Intrabed Non-interfering Testing Technique in Injectors

地层压力是油田开发过程中的重要开发指标之一,它反映了油田不同开发阶段的生产能力,是确定油田开发调整措施的重要依据。随着油田开发的不断深入,开发调整对象逐渐转为差油层和表外储层,层间差异逐渐增大,给注水井分层压力、分层注水量的测量带来了很大难度。注水井层间无干扰测试技术是集双压力探头压力计、自缩式测试密封段、径向磁感应流量计为一体的桥式偏心分层压力测试新技术。该技术可以使注入井在层间无干扰的情况下实现准确监测分层压力和分层注水量,确定油管内压力与温度的变化,判断油层吸水能力,对搞好油田开发调整具有重要意义。

Formation pressure is one important development index, which indicates the productivity of different development stages and can be the evidence for development adjustment. With oilfield development, the adjusted target changes to poor oil beds and marginal reservoirs. Intrabed difference increases, and this affect the accurate measurements of separate layer pressure and separate layer water injection volume in injectors. The intrabed non-interfering testing technique introduced in this paper is one new method, which combines dual pressure probe manometer, automatically withdraw testing seal section, and radial magnetic induction flowmeter. With the application of this technique, separate layer pressure and separate layer water injection volume can be monitored without intrabed interfering in injectors to determine pressure and temperature changes in tubing and absorption ability of oil beds. This technique is significant to effective development and oilfield adjustment.