Method and device for acquiring well cementation circulating temperature

A technology of circulating temperature and cementing, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems affecting calculation accuracy, drilling and cementing effects, and incomplete reference factors, etc.

Active Publication Date: 2017-07-07
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology

[0013] The downhole circulation temperature can be obtained by using the above calculation formula and based on the numerical iteration method; although the above method is concise, the reference factors are not complete, which affects the calculation accuracy and has a corresponding impact on drilling and cementing

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  • Method and device for acquiring well cementation circulating temperature
  • Method and device for acquiring well cementation circulating temperature
  • Method and device for acquiring well cementation circulating temperature

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[0194] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0195] The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0196] The inventor analyzed and found that the current algorithm used in drilling / cementing to predict the downhole circulation temperature has fewer considerations and a simple form, but has the following disadvantages: the model considers the heat carri...

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Abstract

The invention discloses a method and a device for acquiring well cementation circulating temperature. The method comprises the steps that a shaft is divided into two or more components in the radial direction; a heat transfer differential equation for calculating transient heat transfer information of all the components is obtained in combination with radial and/or axial heat conduction information; and the heat transfer differential equation is subjected to dispersion and numerical iteration processing to obtain transient temperature distribution of the shaft. According to the embodiment, the well cementation circulating temperature is calculated in combination with the radial and/or axial heat conduction information, and the calculation precision of the well cementation circulating temperature is improved.

Description

technical field [0001] This article involves but is not limited to oil drilling technology, especially a method and device for obtaining cementing circulation temperature. Background technique [0002] Wellbore circulation temperature has a great influence on drilling and cementing engineering. It is not only related to the success or failure of cementing operation and the quality of cementing, but also related to the pressure balance in the well, the stability of the well wall, the selection of the working fluid system in the well, casing and drilling. It is related to column strength design and other aspects. Therefore, it is of great significance to accurately determine the distribution of wellbore circulating temperature and its changing law for the design of cement slurry system, well control and safe and rapid drilling. [0003] Since the 1960s, many foreign scholars have conducted research on wellbore circulating temperature, and established different theoretical mod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘文成罗宇维赵琥赵丹汇李旭宋茂林郭朝红姜玉雁李志刚
Owner CHINA NAT OFFSHORE OIL CORP
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