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Experimental Studies on Physical Parameters of Simulated Natural Gas Hydrate Bearing Sediments and Thermal Stimulation Exploitation

Author: XiaRan
Tutor: LiShuXia
School: China University of Petroleum
Course: Oil and Gas Field Development Project
Keywords: Gas hydrate Penetration Resistivity Note heat mining Decomposition leading edge
CLC: TE377
Type: Master's thesis
Year: 2011
Downloads: 108
Quote: 0
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Abstract


Gas hydrates as a 21st century strategic energy has a huge potential for development and application prospects. Research has caused countries attach great importance to the nature and the exploitation of natural gas hydrate. This paper uses experiments, analysis and calculation method, system studies the relationship of the physical parameters of hydrate saturation of hydrate in porous media, simulation of the hot brine mining injection hydrate analysis NOTE heat mining dynamic, and the decomposition The leading edge of the mobile law. The experimental simulation undersea Hydrate environment different hydrate saturation property measurement experiments. The experiments show that the hydrate formation, pressure drop, small magnitude of the rise in temperature, the resistance of the first decline after increased substantially. The hydrate formation resistivity is equivalent to the pore water, rock skeleton, hydrate resistance, parallel can be drawn containing the hydrate formation resistivity hydrate saturation relationship; Archie equation deformation Archie parameters regressed , and pointed out that due to the illiquidity and cementation hydrate saturation makes the high value of the exponent n. The hydrate reservoir permeability measurement experiment with the hydrate saturation, permeability decreases. When the hydrate is small, the generated hydrate covering the surface of the particles, with the the Masuda model of N = 7 fitting preferably; with increasing hydrate saturation, hydrates tend to fill the pore center, with the the Masuda model of N = 9 fits well. Analog hydrates Note heat mining experiment, the system of gas production can be divided into the free-gas output the hydrate temperature decomposition and buck gas production in three stages; fluctuating water production rate in the water injection rate. Into the hot water temperature, the higher the speed, the the sand filling tube temperature rise the faster, the higher the peak instantaneous gas hydrate decomposition stage speed and reach peak gas production sooner, lower system energy efficiency. Note thermal time longer under the same injection heat temperature and injection rate of heat, the energy efficiency is lower, indicating that the heat loss in the experiment is large. Move with respect to the leading edge of the decomposition of the resistivity, the temperature can be better monitoring. Using multiple regression method, as well as energy conservation law, draw the decomposition leading edge of the the mobile speed NOTE hot temperature, pressure relationship. The heat of the injection system equal to the hydrate decomposition heat and part of the energy is dissipated and, under the experimental conditions, accounting for 39.48% of the heat for hydrate decomposition.

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CLC: > Industrial Technology > Oil and gas industry > Oil and gas development and mining > Gas field development and exploitation of > Gas fields to improve oil recovery methods
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