CN201804044U - Core resistance measurement holder - Google Patents

Abstract

The utility model relates to an electrical measurement device for rocks, in particular to a clamp holder for core resistance measurement, and adopts the technical scheme that the clamp holder comprises a base, a regulating guide rail, resistance measuring electrodes and flexible solid electrical conductors, wherein the base is connected with a pressure cylinder and the regulating guide rail through a support seat; a pressure gauge is arranged on one side of the pressure cylinder; a regulating hand wheel is arranged on one side of the regulating guide rail; the regulating guide rail is connected with insulating connection bodies; the insulating connection bodies are connected with the resistance measuring electrodes; and the resistance measuring electrodes are connected with a core to be measured through the flexible solid electrical conductors. The utility model has the advantages of simple structure, convenience of use and low cost; and as the electrical property of solid conductive coupling matters is stable and can be marked, the clamp holder can be used repeatedly.

Description

Core resistance measurement holder

1. Technical field

The utility model relates to a rock electrical measuring device, in particular to a rock core resistance measuring holder. the

2. Background technology

At present, the two-pole method is a commonly used method in the laboratory to measure the resistance (rate) of plunger cores at normal temperature and pressure according to Ohm's law. The implementation of this method is to apply an electric field inside the core by arranging a pair of cylindrical (sheet) electrodes on both sides of the plunger core as power supply electrodes, and calculate the resistance by measuring the voltage between the two electrodes and the current intensity flowing through the core. The diameter and length of the core are calculated to obtain the resistivity of the core. Usually, due to the roughness of the core surface, it is easy to cause a gap between the electrode and the end face of the core. Since the air in the gap is not conductive, the contact resistance will be increased, and the measurement result of the core resistance (rate) will be larger than the actual situation. Therefore, at present, rock physics laboratories often use brine-wetted cotton cloth (gauze) or wet filter paper (industry standard SY/T 5385-2007) as a coupling material to reduce contact resistance by controlling the pressure between the electrode and the core to promote coupling. However, in actual operation, it is difficult to control the amount of brine in the cotton cloth (yarn) or filter paper. If it is too much, the resistance (rate) will be small, and even the saturation of the rock will be changed due to the brine entering the core. If it is small, the resistance (rate) will be large. It is difficult to control the resistance and determine the scale, and the different measurement results of the same saturation core have large fluctuations and poor repeatability. the

3. Contents of utility model

The purpose of the utility model is to provide a simple-structured and low-cost rock core resistance measuring holder aiming at the defects of the prior art. the

Its technical solution is: including the base, adjusting guide rail, resistance measuring electrode and flexible solid conductor, the base is connected to the pressure cylinder and the adjusting guide rail through the support seat, a pressure gauge is provided on one side of the pressure cylinder, and an adjusting hand wheel is provided on the side of the adjusting guide rail. The adjusting guide rail is connected to the insulating connecting body, the insulating connecting body is connected to the resistance measuring electrode, and the resistance measuring electrode is connected to the rock core to be tested through a flexible solid conductor. the

The utility model has the advantages of simple structure, convenient use and low cost, and the solid conductive material coupler has stable electrical properties and can be calibrated, and can be used repeatedly. the

4. Description of drawings

Accompanying drawing is the structural representation of an embodiment of the utility model. the

5. Specific implementation

As shown in the figure, a core resistance measurement holder includes a base 1, an adjustment guide rail 4, a resistance measurement electrode 6 and a flexible solid conductor 9. The base 1 is connected to the pressure cylinder 7 and the adjustment guide rail 4 through the support seat 2, and the pressure cylinder 7 is provided with a pressure gauge 10 on one side, and an adjustment hand wheel 3 is provided on one side of the adjustment guide rail 4. The adjustment guide rail 4 is connected to the insulating connecting body 5, and the insulating connecting body 5 is connected to the resistance measuring electrode 6. The resistance measuring electrode 6 passes through the flexible solid conductor 9 Connect the rock core 8 to be tested. the

Claims (1)

1. rock core resistance measurement clamper, comprise base, regulate guide rail, resistance measurement electrode and flexible solid electric conductor, it is characterized in that: base connects pressure cylinder and regulates guide rail by supporting seat, pressure cylinder one side is provided with tensimeter, regulate guide rail one side and be provided with control hand wheel, regulate guide rail and connect the insulation connector, the insulation connector connects the resistance measurement electrode, and the resistance measurement electrode connects rock core to be measured by the flexible solid electric conductor.

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