Quick and convenient well cementation cement permeability testing device

Abstract

The invention belongs to the technical field of specific cement permeability testing, and particularly relates to a quick and convenient well cementation cement permeability testing device. A water storage device comprises a box body, wherein a water inlet on the box body is provided with a first joint; the first joint is used for connecting with a water supply box or a high-pressure air source; the bottom of the box body is provided with a liquid discharging hole; the box body is also provided with a pressurization hole and is connected with an external pressurization device; a liquid surfaceheight controller is arranged in the box body; the top of the liquid surface height controller is positioned on a water inlet, and the bottom of the liquid surface height controller is provided witha hollow rubber ball; the bottom of the box body is connected with a third joint on the top of a cement mould through a second joint; the third joint is also connected with a first external connector;the first external connector is connected with a pressure gage; and a fourth joint connected below the cement mould is provided with an electronic scale and is also connected with a second external connector which is connected with a pressure gage. By use of the device, gas media or liquid media can be independently used for testing cement permeability, a plurality of cement moulds can be simultaneously arranged to carry out batch operations, and efficiency is improved.

Description

technical field [0001] The invention belongs to the specific technical field of cement stone permeability testing, and in particular relates to a fast and convenient cement stone permeability testing device. Background technique [0002] The production of conventional energy such as oil and natural gas and unconventional energy such as natural gas hydrate and shale gas needs to go through a series of complicated processes, which mainly include drilling, cementing and well completion, and the quality of cementing is directly related to The production life of the well plays a vital role in the economics and sustainability of mining. Well cementing mainly includes oil and gas target layer cementing and drilling midway cementing, the main purpose of which is to maintain the long-term stability of the wellbore formation, and the cementing of oil and gas layers also includes sealing off adjacent formations to prevent oil and gas from flowing between layers , and seal off non-prod...

AI Technical Summary

Problems solved by technology

The commonly used cement stone permeability test method is mainly based on Darcy's law, using high-pressure inert gas as the medium for measurement. A certain confining pressure needs to be added during the process to prevent the gas from flowing through the gap between the sample surface and the rubber mold, which will affect the results. the accuracy of

Because the whole process requires the use of high-pressure gas and the need to apply confining pressure, the airtightness of the test device is very important, but in fact the airtightness between the sample surface and the rubber mold is usually difficult to directly judge

Moreover, when making and testing samples of different sizes (diameters), it is necessary to use samples of corresponding sizes to make molds and clamping molds for samples during testing, which will greatly increase the cost

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