关键词: 垂向干扰试井, 夹层, 稳定性, 方法, 试井

Abstract: The vertical interference test is the most effective method determining vertical permeation and researching sealing ability of interlayer.In order to research the stability of interlayer,a vertical interference test method were developed.It can interpret the distance from the well to pinch-out or "open window" of interlayer.This paper introduces the principle and composition of vertical interference test in a multi-layer reservoir.Packer separates the well bore and the formation is divided into upper and lower layers.This paper considers two basic models:disk pinch-out and ring window.The upper and lower layers are permeable and middle layer is impermeable within the near well bore and further more has a pinch-out extending from it or an "open window" in some regions.We establish the theoretical model and find the solution.On the basis of the approximate analytical solutions at an early and a later time period,a vertical interference test method has been designed for interpreting stability of interlayer.A field example is then presented.The data is analyzed.It demonstrates that this type of well testing method is applicable.The result provides foundation for development of multi-layer reservoir,for example,decrees and adjusting well distance,dividing development layer.

Key words: vertical interference test, interlayer, stability, method, well test