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Method, device and equipment for determining elastic wave velocity of natural gas hydrate

A technology for hydrates and natural gas, which is applied in measuring devices, geophysical measurements, seismology, etc., and can solve problems such as the inability to accurately and conveniently determine the elastic wave velocity of natural gas hydrates

Active Publication Date: 2021-01-12
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0006] The embodiment of the present application provides a method, device and equipment for determining the elastic wave velocity of natural gas hydrate to solve the problem that the elastic wave velocity of natural gas hydrate cannot be accurately and conveniently determined in the prior art

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  • Method, device and equipment for determining elastic wave velocity of natural gas hydrate
  • Method, device and equipment for determining elastic wave velocity of natural gas hydrate
  • Method, device and equipment for determining elastic wave velocity of natural gas hydrate

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Embodiment Construction

[0034] The principle and spirit of the present application will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present application, rather than to limit the scope of the present application in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0035] Those skilled in the art know that the embodiments of the present application may be realized as a system, device, method or computer program product. Therefore, the disclosure of the present application can be specifically implemented in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0036] Although the processes described below include mul...

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Abstract

The invention provides a method, device and equipment for determining the elastic wave velocity of a natural gas hydrate, and the method comprises the steps of obtaining a target temperature, a targetpressure, an elastic deformation interval and a first crystal structure of the natural gas hydrate; under the target temperature and the target pressure, balancing the first crystal structure to obtain a balanced second crystal structure and density; at the target temperature, applying axial strain and shear strain to the second crystal structure in the elastic deformation interval, and obtainingthe stress-strain relation of the second crystal structure; determining an elastic constant according to the stress-strain relationship; and according to the elastic constant and the density of the second crystal structure, calculating the wave velocity of the elastic wave when the elastic wave is propagated in the second crystal structure. In the embodiment of the invention, the elastic wave velocity of the natural gas hydrate at the target temperature and the target pressure can be accurately, efficiently and conveniently calculated from the microcosmic scale, and powerful theoretical guidance is provided for exploration and development of the natural gas hydrate.

Description

technical field [0001] The present application relates to the technical field of hydrate resource exploration and development monitoring, in particular to a method, device and equipment for determining the elastic wave velocity of natural gas hydrate. Background technique [0002] Natural gas hydrate is a crystalline compound composed of a cage-like polyhedral structure composed of water molecules and gas molecules of appropriate size bound in the structure under high pressure and low temperature conditions. Natural gas hydrate is a very important "clean energy" . Since the existence of natural gas hydrate in the formation porous medium will increase the overall rigidity and hardness of the porous medium, so that when the elastic wave propagates in the porous medium, the wave speed will increase significantly. Therefore, in the natural environment of exploration or development When gas hydrates are present, the presence or absence of gas hydrates is mainly determined throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/303G01V2210/6222
Inventor 贾冀辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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