分注井直接测试技术

The Direct Testing Techniques for Seperate Injection Well

油田进入开发后期，为了控制高渗层的注水量，加强中、低渗层的注水，需要从监测注入水的动态入手掌握分层吸水状况。分注井直接测试技术采用偏孔直接测试和井筒流动测试两种途径，测试进入每一个层段的注水量、分层压力温度，较真实地反映了各层段的吸水状况，并在测试过程中验证注水封隔器的密封性，不会造成地居污染。应用层面流褶积试井理论分析层段压力、流量资料，得到层段渗透率、表皮系数、吸水指数等资料。18井次现场测试表明，该技术是掌握注水现状、搞好注水结构调整的一项行之有效的动态监测手段。

Water injection is always running through the whole process of oil-field development. During the late period of oil field development, in order to control the water injection volume in high permeable formation, and increase the water injection volume in middle-low permeable formation, the performance of water injection should be monitored to know about the water absorbing conditions. The direct testing techniques for seperate water injection well are divided into two aspects, direct testing offcentre and flow testing in well-bore,measuring the injected water volume of every layer, separate layer pressure and termperature, identifying the status of hygroscopicity and checking the sealing ability of flooding packer, no pollution to the reservoirs. Using the layer flow convolution theory can obtain individual-layer permeabilities, skin factors, water injectivity index for layered reservoirs. Through field test for 18 wells, this techniques are effective development monitoring method of handling current sitiuation of water injection, and adjusting the water injection structure.