注水剖面测井确定分层吸水指数方法研究

针对常规方法获取分层吸水指数存在的问题,结合渗流理论和注水剖面测井一次下井能连续测量流量和压力的特点,提出了测井时多次改变井口注水量,通过注水剖面资料的处理确定各储层的相对吸水量、确定各储层的地层压力和吸水指数的方法,由此还能掌握各储层地层压力和吸水能力的差异.理论分析和实例表明该方法实用可行,克服了传统方法不能分层求取地层参数的不足.

On Method for Determining Injectivity Index of Each Zone by Water Injection Profile Logging

To adjust oilfield development program,it is important to understand the difference between each reservoir's formation pressure and injection capacity of each injection well.In order to solve the problems from obtaining reservoir's formation pressure and injectivity index of each zone by conventional methods,combined with percolation theory and the characteristics for continuous measuring the data of flow,pressure in setting the water injection profile logging unit in one run,a new method is proposed for determining the formation pressure and injectivity index of each reservoir,relative water injection rate by means of changing wellhead injection rate for several times while logging and processing water injection preofile data.Theoretical analysis and practical application indicate the method is useful and feasible,and overcome the limitation that conventional methods can't determine formation parameters of each reservoir.