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Integrated device for in-situ generation and decomposition of hydrate sediments and permeability measurement thereof

A technology for in-situ generation of hydrate sediments, applied in measurement devices, permeability/surface area analysis, analysis materials, etc. Stress state, hydrate sediment samples cannot be taken out as a whole, etc., to meet the requirements of high-precision test, easy to clean, and low cost

Inactive Publication Date: 2012-05-09
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used hydrate sediment simulation device cannot compress and consolidate the sediment framework, and cannot truly simulate the historical deposition conditions and stress state of hydrate sediments
And affected by its size and design factors, the generated hydrate sediment sample cannot be taken out as a whole, or part of it can be put into a low-temperature high-pressure triaxial testing machine for mechanical properties, etc., after liquid nitrogen cooling, lathe processing and other processes. further research work

Method used

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  • Integrated device for in-situ generation and decomposition of hydrate sediments and permeability measurement thereof
  • Integrated device for in-situ generation and decomposition of hydrate sediments and permeability measurement thereof
  • Integrated device for in-situ generation and decomposition of hydrate sediments and permeability measurement thereof

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Embodiment Construction

[0027] figure 1 Shown is a working principle diagram of an integrated device for in-situ generation and decomposition of hydrate deposits and its permeability measurement. The system supplies methane gas to the reactor, and controls the internal pressure of the reactor through a constant pressure pump. The water supply system supplies distilled water to the reactor. The cold storage and constant temperature tank control the temperature required for the reaction. The working parameters during the reaction process such as temperature and pressure signals, etc. All were collected and analyzed by computer data acquisition system. After the hydrate is formed, the permeability measurement system is used to measure the permeability of the hydrate deposit or the hydrate deposit can be taken out and placed in a triaxial testing machine for mechanical property tests.

[0028] figure 2 It is a system diagram of an integrated device for in-situ formation and decomposition of hydrate de...

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Abstract

An integrated device for in-situ generation and decomposition of hydrate sediments and permeability measurement thereof belongs to the field of measuring the basic physical properties of natural gas hydrates. The device mainly comprises a reaction kettle, a cold store, a scavenging leakage detection system, a temperature control system, a gas supply system, a water supply system, a permeability measurement system and a computer data acquisition system. A compression type design is adopted for the reaction kettle so that different stress states can be simulated. The device has the following advantages that: the cold store and a constant temperature bath are capable of realizing quick and accurate control of temperatures; the gas supply system is quick and convenient to increase and preserve pressures; the data acquisition system has the functions of data storage and real-time analysis; the temperatures, pressures, historical sedimentary conditions and stress states of different hydratesediment reservoirs can be simulated; and a hydrate sediment sample can be integrally taken out in a relatively convenient manner, and can be directly put in a low-temperature high-pressure three-axis tester for the mechanical characteristic testing research. Besides, the device plays an important role in guiding the drilling and safe mining of natural gas hydrates.

Description

technical field [0001] The invention relates to an integrated device for in-situ generation and decomposition of hydrate deposits and measurement of permeability thereof, which belongs to the field of basic physical property measurement of natural gas hydrate. Background technique [0002] Natural gas hydrate has the characteristics of wide distribution, large amount of resources, shallow burial, high energy density, and cleanliness. It is the largest unknown energy pool that has not yet been developed on the earth. It is considered to be the most ideal new energy source with commercial development prospects in the 21st century. The safe exploitation of natural gas hydrate has been widely valued by scientists and governments of various countries, and has become a new research hotspot in the oil and gas industry, and may have a profound impact on the development of environmental science and energy industry. In May 2007, my country officially collected natural gas hydrate phys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N3/00G01N15/08
Inventor 宋永臣李洋辉刘卫国于锋王锐聂雄飞
Owner DALIAN UNIV OF TECH
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