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Hydrate sediment flow solid output measuring device combining X-CT technology and measuring method

An X-CT and measurement device technology, applied in the field of hydrate sediment flow solid output measurement device, can solve problems such as uneven distribution, inability to accurately evaluate flow solid output, and inability to reflect the response law

Active Publication Date: 2019-01-22
QINGDAO INST OF MARINE GEOLOGY
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Problems solved by technology

In laboratory experiments, natural gas hydrate formation is random, and its distribution in sediment pores is uneven. The measurement results cannot reflect the response law of fluid solid migration and basic structural parameters of sediments during the process of hydrate accumulation and dispersion, and thus cannot be accurate. Evaluating Fluid Solids Production During Hydrate Depressurization Production

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  • Hydrate sediment flow solid output measuring device combining X-CT technology and measuring method
  • Hydrate sediment flow solid output measuring device combining X-CT technology and measuring method

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Embodiment 1

[0037] Embodiment 1, a hydrate sediment flow solid output measurement device combined with X-CT technology, including an X-ray penetrating reactor, an X-CT scanning analysis system connected to the X-ray penetrating reactor, and a vacuum pump system, temperature and pressure control system, hydrate sample preparation system, sand production monitoring system and permeability measurement system, and the X-CT scanning analysis system, temperature and pressure control system, sand production monitoring system and permeability measurement system are all connected with a computer 22 connected; the X-ray penetrating reactor is used for the synthesis and decomposition of hydrate; the X-CT scanning analysis system is used for real-time scanning of sediment microstructure, and the X-CT scanning analysis system consists of a micron-scale switchable X-ray source , a stage and a high-resolution flat panel detector, the highest resolution can reach 500nm, and its built-in rotatable three-di...

Embodiment 2

[0049] Embodiment 2, based on the measurement device described in embodiment 1, the present invention also proposes a measurement method based on the above-mentioned combined X-CT technology of the hydrate sediment flow solid output measurement device, comprising the following steps:

[0050] (1) Airtightness inspection of the device: Check whether the sealing ring and vulnerable parts of the device are intact, close the first valve 23-1, the fourth valve 23-4 and the sixth valve 23-6, open the high-pressure gas cylinder 17 and the 2. Valve 23-2, let 1MPa gas flow in, if the pressure of the device does not change significantly within 10 hours, it means that the device has good airtightness;

[0051] (2) Sample loading: according to the needs of the experiment, the sand control pipe 41 and the sintered plate 32 of the corresponding size are selected, respectively placed in the inner cavity 25 of the reaction kettle, and the prefabricated sediment sample 1 is filled in the inner ...

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Abstract

The invention discloses a hydrate sediment flow solid output measuring device combining an X-CT technology and a measuring method. The measuring device comprises an X-ray penetration type reaction kettle, an X-CT scanning analysis system, a vacuum system, a temperature and pressure control system, a hydrate sample preparation system, a sand production monitoring system and a permeability measuringsystem, wherein through integrated application of a sand production-seepage system under the micro-scale multi-factor coupling effect, the coupling relationship of a reservoir structure and physicalspace-time evolution and flow solid output under the multi-factor collaborative action can be quantitatively described, different hydrate generation modes can be selected according to the experiment requirements, different hydrate occurrence states in natural sediments can be simulated and studied, and the device and the method can be used for researching the space-time evolution characteristics of a sediment pore structure under the hydrate convergence and divergence and effective stress conditions and an influence rule of the space-time evolution characteristics on sediment flow solid output, so that the theoretical bottleneck of the hydrate reservoir structure and a physical evolution and flow solid output mechanism in a hydrate production process is broken through, and the device and the method have important engineering significance to deeply understand a depressurizing production law of the South China Sea, practically improve the biogas production efficiency and perfect a depressurizing production technology system.

Description

technical field [0001] The invention belongs to the technical field of basic physical property measurement of unconventional oil and gas reservoir engineering and geotechnical engineering, and specifically relates to a measurement device and method for measuring the solid output of a hydrate sediment flow combined with X-CT technology. Background technique [0002] Natural gas hydrate exists widely in nature, mainly distributed in the continental shelf and permafrost regions. Due to its huge reserves, high efficiency, cleanliness and pollution-free characteristics, it is considered as a potential energy resource. In recent years, the exploration and development of natural gas hydrate has gradually been highly valued by various countries. The active development and utilization of natural gas hydrate is of great significance for alleviating energy supply, adjusting energy structure and reducing air pollution. [0003] However, according to the water and gas production data of ...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N35/00
CPCG01N33/24G01N35/00584
Inventor 张准刘昌岭刘乐乐宁伏龙李承峰孟庆国李彦龙
Owner QINGDAO INST OF MARINE GEOLOGY
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