NMR relaxation semaphore calibrating device and method for aquo-complex sediment by combining X-CT technology

A kind of hydrate sediment, X-CT technology, applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve complex, inconsistent sediment structure, and cannot apply NMR relaxation signal quantity Calibration and other issues to achieve the effect of simplifying the experimental procedure and accurate and reliable results

Active Publication Date: 2019-02-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] NMR technology is one of the important means to study the pore-scale behavior characteristics of rock-soil porous media materials. Through multi-exponential fitting and inversion of the original echo series, basic information such as porosity and pore size distribution of porous media materials can be obtained, which is often used To study the seepage characteristics of porous media materials, and the pore behavior of hydrate-containing sediments is more complicated than that of conventional rock-soil porous media materials. Neither capillary pressure measurement nor isothermal ads...

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  • NMR relaxation semaphore calibrating device and method for aquo-complex sediment by combining X-CT technology
  • NMR relaxation semaphore calibrating device and method for aquo-complex sediment by combining X-CT technology
  • NMR relaxation semaphore calibrating device and method for aquo-complex sediment by combining X-CT technology

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Embodiment 1

[0038] Please refer to figure 1, the embodiment of the present invention provides a hydrate deposit NMR relaxation signal calibration device combined with X-CT technology, including a reactor 1, an NMR testing system 2, an X-CT scanning system 3, a hydrate synthesis system 4, a temperature Pressure control system 5 and vacuum saturation system 6.

[0039] Please refer to figure 2 , deposit sample is placed in reactor 1, described reactor 1 comprises sample cylinder 11, outer cylinder 12, sealing end cap 13, and described sample cylinder and outer cylinder are made of PEEK material that does not shield X-ray and has no nuclear magnetic signal The wall thickness is less than 2mm, and the highest pressure can reach 30Mpa. The sample cylinder 11 and the outer cylinder 12 are welded into a whole through the middle of the pipeline. The deposit is placed in the sample cylinder 11, and the two ends of the deposit are A permeable stone 14 is provided, the lower end of which is conne...

Embodiment 2

[0061] Please refer to figure 1 and figure 2 , the embodiment of the present invention provides a hydrate sediment NMR relaxation signal calibration device combined with X-CT technology, a reactor 1, an NMR test system 2, an X-CT scanning system 3, a hydrate synthesis system 4, a temperature and pressure Control system 5 and vacuum saturation system 6.

[0062] specifically:

[0063] The reaction kettle 1 is made of PEEK material that does not shield X-rays and has no nuclear magnetic signals, the wall thickness is less than 2mm, and the maximum pressure resistance can reach 30MPa. The kettle body is small and light, which is convenient for the conversion test of X-CT and NMR; 1. It is welded in the middle of two layers of cylinders. The inner sample cylinder 11 has a diameter of 25.4mm and a length of 60mm. The outside of the sample cylinder 11 is a circulating medium of fluorine oil, which provides the corresponding temperature for hydrate formation and decomposition by c...

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Abstract

The invention discloses an NMR relaxation semaphore calibrating device and method for an aquo-complex sediment by combining an X-CT technology. The device comprises a reaction kettle, an NMR testing system, an X-CT scanning system, an aquo-complex synthesizing system, a temperature pressure control system and a vacuumizing saturated system. The vacuumizing saturated system is connected to the reaction kettle for vaccumizing saturated treatment of the sediment in the reaction kettle. The NMR testing system and the X-CT scanning system are used for scanning and testing microporous structures ofthe aquo-complex sediment and analyzing the behavior characteristics of the aquo-complex sediment in pore scale in the forming and decomposing processes. By means of the device, calibration of nuclearmagnetism transverse relaxation semaphore and the behavior measurement and analysis in the pore scale can be integrated, thereby laying a technical foundation for discussing a micromechanism of basicphysical parameter change of the aquo-complex sediment.

Description

technical field [0001] The invention relates to the field of basic physical property testing of unconventional oil and gas reservoir engineering and geotechnical engineering, in particular to a device and method for calibrating NMR relaxation signal quantities of hydrate deposits combined with X-CT technology. Background technique [0002] Gas hydrates are widely distributed in deep ocean strata and permafrost strata. Due to their huge reserves, high energy density, and clean and pollution-free properties, they are considered to be an important potential alternative energy source. [0003] However, the harsh natural environment, variable reservoir properties and complex phase transition process make the exploration and development of hydrates more difficult than conventional oil and gas, and commercial exploitation has more severe environmental and technical problems. At present, it is recognized that the most environmentally friendly and effective method of mining is the de...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 张准宁伏龙刘志超张凌方彬王冬冬孙嘉鑫
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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