Device and method for accurately testing apparent density of light material in well cementation cement slurry system

Abstract

The invention provides a device and a method for accurately testing the apparent density of a light material in a well cementation cement slurry system, and is characterized in that the device mainly comprises an upper sealing cover, a filter screen membrane, a transparent cylinder, a piston, a rubber sealing ring, a lower sealing cover, a groove, a push rod, a laser measuring instrument, the light material, a semi-sealed space, a concave shoulder, mixed liquid and a pushing structure, the filter screen membrane is preferably selected according to the relation of the minimum particle size gt of the light material, the mesh diameter gt of the filter screen membrane and the water molecule diameter. According to the invention, the laser particle size analysis tester, the electronic balance and the laser measuring instrument are used for testing and analyzing the minimum particle size of the light material and the mass and volume of the mixed liquid respectively, and the pushing structure is used for slowly compressing and pressurizing the mixed liquid in the semi-sealed space, so that uniform mixing of the light material and water in the semi-sealed space is realized; and the apparent density of the light material is obtained based on a drainage volume method principle. The invention is mainly suitable for the technical field of petroleum and natural gas well cementation engineering.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas cementing engineering, in particular to a device and method for accurately testing the apparent density of light materials in a cementing slurry system. Background technique [0002] Economic and social development is inseparable from the support of energy. Petroleum is one of the most important energy sources in modern society. It is the blood of industrial development and has the magic power to control the destiny of a country. It is indispensable for the survival and development of a country. Cementing operation, including casing running and cement injection, is an indispensable and important link in the process of drilling and completion operations. It serves the purpose of protecting and supporting the casing of oil and gas wells and isolating oil, gas, water and other formations. Cementing construction can strengthen the well wall, prevent the collapse of shallow layers and...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the present invention aims at the problem that it is difficult to directly and accurately measure the density of light materials in the cement slurry, and proposes a device and method for accurately testing the apparent density of light materials in the cement slurry system. The apparent density of low-density lightweight materials in well engineering provides a reasonable basis for selecting cement slurry systems in different pressure-bearing formations and optimizing the design of cementing construction parameters. It has very important theoretical value and engineering significance for improving cementing quality

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