校正续流段压力落差的早期试井分析

在注水井分层测试中,由于油藏的低渗透性或者测试时间相对较短等原因,各层的压力恢复曲线难以出现径向流直线段.通过校正续流段压力数据,使用了考虑嘴损的早期试井方法进行解释,同时反求出续流量,计算出地层参数.实例分析表明,该方法在缩短关井时间的同时,分析结果更接近于常规分析和图版拟合的结果,能够相对精确地获得各层的地层参数.所提出的方法是可行的.

Early Well Testing Method of Correcting Afterflow Region Pressure Fall-off Data

In the multiplelayered test for injection we ll s, a lot of pressure falloff curves in the single layers are hard to show a ra dial flow straight line due to the perturbative phenomena of multilayer reservoi r, low permeability or short test time. In this paper, an early well testing met hod for correcting afterflow region pressure falloff data is introduced. As sh own in the example, the analysis results of the early testing method and convent ional method are extremely approximative. Therefore, the method presented in the paper is practicable.