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

摘要： 垂向干扰试井技术是确定垂向渗透率研究油层密封性的有效方法.针对大庆油田细分层注采的实际,研究高含水主力油层与薄、差油层及表外储层间的夹层的稳定性,采用同井层间(垂向)干扰试井方法求取夹层尖灭、天窗到测试井的距离.文中介绍了垂向干扰试井工艺原理及实现方式;并考虑圆盘尖灭和圆环天窗两种基本模型,建立相应的物理和数学模型,拉氏变换求得拉氏空间解.根据夹层尖灭、天窗情况下中、晚期近似解,给出确定夹层稳定性的同井层间干扰试井解释方法,编制解释软件,通过实例说明其应用.同井层间干扰试井技术研制成功,为大庆油田挖潜难采储层、细分开发层系提供了可靠依据.

关键词: 垂向干扰试井, 夹层, 稳定性, 方法, 试井