Clamp for measuring permeability anisotropy of full-diameter core

Abstract

The invention provides a clamp for measuring permeability anisotropy of a full-diameter core, comprising a rubber sleeve, a rubber sleeve fixture, a rubber sleeve end plug, and a metal conduit, wherein the rubber sleeve end plug includes an upper end plug and a lower end plug, a seal ring is embedded to the outside of each of the upper end plug and lower end plug, the upper end plug is embedded to the upper end of the rubber sleeve, the lower end plug is embedded to the lower end of the rubber sleeve, the upper end plug and the lower end plug are of hollow structure and are connected with the metal conduit, the rubber sleeve fixture includes a rubber sleeve pull rod and a rubber sleeve fixing plate, the rubber sleeve is fixed to the rubber sleeve fixing plate, the inner wall of the rubber sleeve is peripherally and evenly provided with four cambered rigid mesh plates, and the rigid mesh plates are embedded in and pasted in the rubber sleeve through AB adhesive. The clamp provided herein can provide measurement for anisotropy, has high testing efficiency, and has small damage, good durability, reusability and prolonged life since the high-mechanical-strength embedded mesh plates are added.

Description

technical field [0001] The invention relates to laboratory rock measurement technology, in particular to a holder for measuring the anisotropy of permeability of a full-diameter rock core. Background technique [0002] When formulating an oilfield development plan, it is necessary to grasp the anisotropy of formation permeability, which is achieved by measuring the vertical and lateral permeability of the full-diameter core. At present, there are two typical methods and equipment commonly used in China. One is the standard method and equipment (see figure 1 ), which is the international version of the Hassler-type core holder; the Hassler-type core holder is the most widely used, and its basic features are: simple structure, good contact through the end plug with a certain taper and the confining pressure rubber sleeve , the confining pressure bearing capacity is strong, and the core sample can be taken out by partially disassembling the core holder; however, the Hassler t...

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned invention patent simulates the pressure of the core sample in the formation by the overlying strata through the core holder, which overcomes the shortcomings of the existing related test experiment design. The experimental test method and device disclosed in the above invention can be more accurate and more scientific. The permeability of the core sample; however, the above-mentioned invention patent cannot be realized for the test of the anisotropy of the formation permeability of the core sample, and the test of the vertical and lateral permeability

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