System and method for analyzing influence of gas chimney to generation and distribution of natural gas hydrates
A technology for hydrate formation and impact analysis, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems that have not yet been tested or verified by sampling, hydrate saturation parameters have not been tested separately, and problems have not been explored
Pending Publication Date: 2018-11-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
[0008] (1) Whether the inside of the gas chimney is blocked by high-saturation hydrates or is a hollow channel, different scholars have different opinions, and experiments or sampling verification have not yet been carried out;
[0009] (2) In the sediments around the gas chimney, whether there is a correlation between the hydrate saturation and the distance from the gas chimney has not yet been explored
[0010] (3) For the natural gas hydrate synthesis samples at different locations, the hydrate saturation parameters were not tested separately, and the spatial distribution characteristics of the hydrates formed when the gas chimney provided the gas source for the natural gas hydrate system could not be grasped
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[0070] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0071] For the natural gas hydrate synthesis samples at different locations, the hydrate saturation parameters were not tested separately, and the spatial distribution characteristics of the hydrates formed when the gas chimney provided the gas source for the natural gas hydrate system could not be grasped.
[0072] Such as Figure 1-Figure 2 As shown, the analysis system for the influence of the gas chimney on the formation and distribution of natural gas hydrate provided by the embodiment of the present invention is composed of a constant temperature box, a high-pressure reactor and a data acquisition system. The high-pr...
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The invention belongs to the technical field of exploration and development of natural gas hydrates and discloses a system and a method for analyzing the influence of a gas chimney to the generation and distribution of natural gas hydrates. The method comprises the following steps: simulating the gas chimney as a fluid transfer channel so as to supply an air source to a natural gas hydrate stableregion, and calculating the saturability of the hydrates by virtue of an electrical resistivity monitoring result; setting different geological condition parameters including gap water salinity, sediment size, experimental temperature and pressure, and setting different air inlet speeds; and simulating the distribution of the hydrates in the gas chimney and peripheral sediments under different geological conditions and different air supply feeding strengths. According to the method, the saturability parameters of hydrates of natural gas hydrate synthesized samples at different positions such as the inside of the gas chimney and different positions of sedimentary strata away from the gas chimney are respectively tested, and the space distribution feature of the generated hydrates is graspedwhen the air supply is provided by the gas chimney to a hydrate system.
Description
technical field [0001] The invention belongs to the technical field of natural gas hydrate exploration and development, and in particular relates to a system and method for analyzing the influence of a gas chimney on the formation and distribution of natural gas hydrate. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Sufficient gas source is the basis for forming high-saturation gas hydrate reservoirs. In-depth analysis of gas source conditions not only helps to understand the accumulation mechanism of gas hydrate systems, but also affects the resource investigation, evaluation, and even development and utilization of gas hydrates. The gas sources of hydrates include biogenic gas generated in situ and thermogenic gas migrated vertically from deep, or a mixture of the two. It is generally believed that the amount of biogenic gas generated in situ is too small to form abundant gas hydrate reservoirs,...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/20Y02A90/30
Inventor 杨金秀唐明明卢双舫王民肖佃师
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)