Potential measuring device and method

Abstract

The embodiment of the invention discloses a potential measuring device. The potential measuring device comprises a fluid measuring device, a fluid driving device and an electric signal testing device, wherein the fluid testing device comprises a pressure bearing cylinder and a testing cylinder; the testing cylinder is arranged in the pressure bearing cylinder, and a cavity for containing testing fluid is formed between the pressure bearing cylinder and the testing cylinder; the pressure bearing cylinder comprises a first body, a first opening, a second opening and a third opening, the first body is relatively sealed, the first opening is arranged on the first body and is used for air exhaust, the second opening is used for air intake, and the third opening is used for liquid intake; the testing cylinder comprises a second body, a first electrode and a second electrode, and the first electrode and the second electrode are arranged in the second body at preset distance; the fluid driving device is respectively communicated with the pressure bearing cylinder through the second opening and the third opening; the electric signal testing device comprises a voltmeter, a differential pressure meter and a capacitance measuring device. The potential measuring device can be used for measuring the Zeta potential of a micro-dispersion oil driving system at pressure higher than normal pressure.

Description

technical field [0001] The present application relates to the technical field of fluid physical property measurement, in particular to a potential measurement device and method. Background technique [0002] In the field of oilfield development, in order to enhance oil recovery, oil displacement technologies such as gas injection flooding, chemical modulation flooding and polymer flooding have been continuously concerned and studied. However, with the continuous deepening of oil field development, the ability of these oil displacement technologies to stabilize oil and control water has been greatly challenged. In this situation, researchers have developed a series of low-cost, adjustable new micro-dispersed oil displacement systems, which can control the mobility of displacement phases by stages and by parts, and increase the swept volume of high water-cut oilfields while increasing the sweep volume. Efficiency, thereby improving the ability to stabilize oil and control wat...

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Problems solved by technology

[0005] The inventors have found that there are at least the following problems in the prior art: in the process of oil field development, as the depth of the oil displacement formation becomes deeper, the pressure of the actual formation position where the microdispersed oil displacement system is located is higher than the normal pressure. The Zeta potential can only be measured under normal pressure, and the Zeta potential of the microdispersed oil displacement system cannot be measured under pressure higher than normal pressure

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