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Device and method for testing density of high-temperature and high-pressure cement paste

A high-temperature and high-pressure water and mud density technology, applied in the direction of measuring devices, specific gravity measurement, instruments, etc., can solve problems such as imperfection, difficulty, and lack of simulated formation environment, so as to alleviate engineering and technical problems, simplify cumbersome procedures, and strengthen adaptive effect

Inactive Publication Date: 2021-06-29
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0003] At present, there is no single implementation standard for cementing slurry density testing in China, and there are no convenient testing tools and corresponding testing methods suitable for oilfield sites
Especially in terms of the density measurement of cement slurry under high temperature and high pressure conditions, the relevant domestic experimental devices are not yet perfect, and there is still a lot of room for improvement
At the same time, the number of existing devices and methods for testing the density of cement slurry is relatively small, and most of them are tested for cement slurry in ordinary environments without simulating the actual formation environment, so it is difficult to truly calculate the density of cement slurry. True density, less accurate and less reliable test

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  • Device and method for testing density of high-temperature and high-pressure cement paste

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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.

[0025] In the present invention, the terms "first", "second" and the like are used to distinguish similar objects, rather than to describe a specific order or sequence, unless stated otherwise. The terms used should be understood as such; use of the terms "upper", "lower", "left", "right", etc. generally refers to the orientation shown in the drawings, or to the parts themselves in vertical, perpendicular or In terms of the direction of gravity; similarl...

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Abstract

The invention discloses a device and method for testing the density of high-temperature and high-pressure cement paste. The testing device comprises a sealed container, and a cement paste injection device, a pressurizing device, a heating device and a detection device which are respectively connected with the sealed container, and the sealed container is provided with a first pressure monitoring device; the cement paste injection device comprises a cement paste storage tank and a cement paste injection pump which are connected, the output end of the cement paste injection pump is connected with the sealed container through a first pipeline, and a first valve is arranged on the first pipeline; the pressurizing device comprises an air inlet pump and an air storage bottle which are connected, an air outlet of the air storage bottle is communicated with the sealed container through a second pipeline, and a second pressure monitoring device and a second valve are sequentially arranged on the second pipeline; and the detection device comprises a volume measuring instrument and a weight measuring instrument. According to the invention, the density of cement paste can be measured more accuratelyunder the stratum condition, and technical support is provided for field construction of an oil field.

Description

technical field [0001] The invention relates to the technical field of cement slurry detection in well cementing operations, in particular to a high-temperature and high-pressure cement slurry density testing device and method. Background technique [0002] Cementing operation is an indispensable and important link in drilling and completion operations, which includes casing running and cement injection. Cementing technology is a multi-disciplinary comprehensive application technology, which is systematic, one-time and short in time. Among them, cement injection is the key process after the casing is run into the well. Its function is to seal the annular space between the casing and the well wall to isolate the oil and gas water layer, so that the casing becomes a channel for oil and gas to enter the well. Among them, the cement slurry density has a great influence on the rheological properties, settlement stability, water loss, compressive strength and other aspects of the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/02
CPCG01N9/02
Inventor 岳陶段永刚魏明强陈旭谭林江王欢李艳王鑫隆腾屹杜怡鹤
Owner SOUTHWEST PETROLEUM UNIV
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