Determination method for accumulation rate and void fraction of oil well cement mixed system
A technology for cementing and measuring methods, which is applied to measuring devices, permeability/surface area analysis, instruments, etc., can solve problems such as inaccurate measurement results, and achieve the effect of improving accuracy.
Inactive Publication Date: 2018-01-19
BC P INC CHINA NAT PETROLEUM CORP +1
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It can be seen that the above two methods all have the problem of inaccurate measurement results.
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[0036] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0037] refer to figure 1 As shown, the accumulation rate and porosity determination method of the cementing cement mixing system of the embodiment of the present application may include:
[0038] S101. Select a water-solid volume ratio from the water-solid volume ratio set.
[0039] In the examples of the present application, the water-...
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Abstract
The embodiment of the invention provides a determination method for the accumulation rate and void fraction of an oil well cement mixed system. The method includes: selecting a water-solid volume ratio from a water-solid volume ratio set; under the water-solid volume ratio, adding a specified amount of water into a stirrer; blending cement and mineral powder according to the well cementing requirement to obtain a cement mixed system; adding the oil well cement mixed system into the stirrer in batches and stirring the substances evenly to obtain a slurry; according to the volume and weight of the slurry, determining the solid phase volume content of the cement mixed system; repeating the steps to acquire the solid phase volume content of the cement mixed system under all water-solid volumeratios in the water-solid volume ratio set; determining an optimal water-solid volume ratio under a maximum solid phase volume content, and confirming the maximum value as the accumulation rate of thecement mixed system; and according to the accumulation rate of the cement mixed system, acquiring the void fraction of oil well cement mixed system. The embodiment of the invention can improve the determination accuracy of accumulation rate and void fraction in the oil well cement mixed system.
Description
technical field [0001] The present application relates to the technical field of cementing engineering, in particular to a method for measuring the accumulation ratio and void ratio of a cement mixing system for well cementing. Background technique [0002] Cement accumulation rate is the ratio of actual volume to apparent volume of solid particles in the cement mixing system, and cement void ratio is the ratio of void volume to apparent volume between solid particles in the cement mixing system. The sum of the two is equal to 1. Studies have shown that the accumulation rate and porosity of cement cement have a significant impact on the performance of the cement slurry system, and will ultimately affect the cementing quality of oil and gas wells and the long-term sealing integrity of the annulus. Therefore, it is of great significance to measure the accumulation rate and void ratio of cement. [0003] For the determination of the accumulation rate and porosity of the cemen...
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IPC IPC(8): G01N5/00G01N15/08
Inventor 刘慧婷于永金靳建洲徐明刘硕琼袁进平刘斌辉丁志伟纪宏飞冯宇思
Owner BC P INC CHINA NAT PETROLEUM CORP