A Multivariable Conditional Submarine Shallow Gas Seepage Simulation Method
A simulation method and technology of shallow gas, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of seabed shallow gas leakage simulation, and achieve the effect of simple and reliable simulation method and accurate simulation results
Active Publication Date: 2021-06-29
GUANGZHOU MARINE GEOLOGICAL SURVEY
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[0010] In view of the deficiencies in the prior art, the object of the present invention is to provide a method for simulating shallow seabed gas seepage under multivariable conditions, which can solve the problem of simulating seabed shallow gas seepage
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[0037] Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:
[0038] Such as figure 1 As shown, a method for simulating shallow seabed gas leakage under multivariate conditions includes the following steps:
[0039] Step 1: Each layer of simulation chambers inside the water tank 3 is covered with quartz sand, and the particle size of the quartz sand in each layer of simulation chambers increases sequentially from top to bottom, that is, the particle size of the quartz sand in the uppermost simulation chamber is the smallest , the particle size of the quartz sand in the simulation chamber of the lowest layer is the largest, but the particle size of the quartz sand inside each layer is the same;
[0040] Step 2: The water in the reservoir 10 is sprayed from the water injection nozzle 2 after passing through the water injection pipe 4, and injected into the water tank 3, and the water passes through the simulation c...
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Abstract
The invention relates to a method for simulating gas seepage in the shallow seabed under multivariable conditions, comprising the following steps: Step 1: each layer of the simulation chamber inside the water tank is covered with quartz sand, and the particle size of the quartz sand increases sequentially from top to bottom ; Step 2: Inject the water in the reservoir into the water tank, and the water penetrates into the quartz sand; Step 3: The simulated gas leaks into the quartz sand, the simulated gas migrates upwards and enters the water, and finally escapes from the water; Step 4: The gas collection hood collects the simulated gas escaping from the water and sends it to the gas collection tank for storage; Step 5: The simulated gas deforms the most surface quartz sand, records the deformation process of the quartz sand and measures the The data of the deformation of the quartz sand; Step 6: Continue to record the deformation process of the quartz sand and measure the data of the deformation of the quartz sand until the end of the experiment. The invention simulates the ocean bottom environment by laying quartz sand, and methane is used as the simulated gas, the simulation method is simple and reliable, and the simulation result is more accurate.
Description
technical field [0001] The invention relates to the technical field of shallow gas simulation devices, in particular to a method for simulating seabed shallow gas seepage under multivariable conditions. Background technique [0002] Shallow gas refers to all kinds of natural gas resources with relatively shallow burial depth (generally within 1500m) and relatively small reserves. Therefore, shallow gas exists in many seabeds, and shallow gas may be the biogenesis of shallow biological processes. It may also be the thermogenic gas that the deep gas enters the shallow layer along the migration channel, or the gas released by the decomposition of the hydrate accumulated in the shallow layer due to the change of temperature and pressure conditions. [0003] The geological conditions of the shallow seabed are unstable, and shallow gas usually migrates to the seabed in the form of diffusion or leakage, which will cause changes in the topography of the shallow seabed. Due to the c...
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IPC IPC(8): G01N33/22
CPCG01N33/225
Inventor 黄伟梁金强陆敬安尚久靖张伟赖洪飞郭依群林霖徐梦婕杨承志孟苗苗单晨晨
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY