致密岩心液体渗透率测量的新方法——毛细管流黏法

A New Measuring Method for Liquid Permeability Determination of Tight Cores:Capillary Flow Rate and Viscosity Method

致密岩心液体渗透率测量对储层准确评价起非常重要的作用。致密储层常用的稳定测量实验很难准确快速测量岩心的液体渗透率。因此提出一个简便快捷测量致密岩心液体渗透率的新方法-毛细管流黏法。该方法通过差压式传感器直接测量压力,就能得出流体流量和黏度的乘积,并找出其与岩心串联的毛细管的内径和长度的关系式。实验结果表明,毛细管流黏法不需测量流体的黏度和流量,且具有测量误差小、耗时短、重复性好、设备装置简单等优点,对致密岩心液体渗透率的测量有很好的适用性。

The measurement of fluid permeability of tight cores plays an important role in accurate evaluation of a reservoir.The permeability experiment commonly used in lab research cannot measure the fluid permeability of tight cores accurately and quickly.A new simple and easy-to-do method is proposed in this paper: capillary flow rate and viscosity method.In this method,a differential pressure transducer is used to measure pressures generated,thus calculate the product of fluid flow rate and viscosity,and obtain the relation between the product,the inner diameter and length of connected with the capillary.Experimental results showed that this method did not necessitate the measurement of fluid viscosity and flow rate,and had a good repeatability and small measuring error.Time for the experiment is short,and the measuring device is very simple.This method is suitable for the measurement of the fluid permeability of tight cores.