The invention relates to a seabed natural gas hydrate rock core shipborne multifunctional analysis laboratory device and belongs to the field of marine oil and gas reservoir resource exploration technology research. The technical key points are as follows: a rock core pressure-retaining transfer system analysis chamber is connected with a system analysis chamber group; the system analysis chambergroup is connected with a rock core pressure-retaining cutting system laboratory; one end of an in-situ permeability measuring system is connected with the rock core pressure-retaining cutting systemlaboratory, and the other end of the in-situ permeability measuring system is connected with the rock core pressure-retaining transfer system analysis chamber; and a hydrate rock core geophysical andchemical analysis laboratory is connected with the rock core pressure-retaining transfer system analysis chamber. The seabed natural gas hydrate rock core shipborne multifunctional analysis laboratorydevice has the following beneficial effects: a natural gas hydrate deposit rock core can be subjected to comprehensive physical parameter measurement in situ; firsthand exploration geological data can be acquired rapidly and conveniently; furthermore, plane strain mechanics experiment is conducted under the simulated sea original storage state, and the seabed natural gas deposit rock core can besubjected to strength and volume deformation measurement.

Seabed natural gas hydrate rock core shipborne multifunctional analysis laboratory device

The invention discloses a mining method and mining device for a sea-phase natural gas hydrate The mining method comprises the following steps that (1), a fixing pipe is constructed after a vertical well is constructed, a mining well is arranged in the center of the fixing pipe, and an uniformly-mixed mixture fills the portion between the inner wall of the fixing pipe and the outer wall of the mining well; (2), a self-excitation oscillating jet nozzle enters the mining well along the vertical well and reaches a specified position through an orifice on the mining well so as to spray the mixture, so that the mixture is uniformly crushed to form artificial fractures; (3), under the corresponding temperature, pressure reduction mining and hydrate decomposition gas production are carried out; and (4), gas-liquid mixture produced by the mining well is separated in a gas-liquid separation device to obtain liquid and gas, and the obtained liquid and gas are collected The mining method has theadvantages of stable pressure reduction mining, improvement of mining efficiency, recovery of high-concentration natural gas, automatic operation and remote control, and can provide guidance for exploitation of the sea-phase natural gas hydrate

Mining method and mining device for sea-phase natural gas hydrate

The invention relates to the technical field of natural gas hydrate detection and research equipment, and provides a device and method for measuring the resistivity of natural gas hydrate pressure-holding coring samples. The device comprises a sample pressure-holding transfer chamber, a sample pressure-holding resistivity measuring chamber and a sample pressure-holding grabbing chamber, which areconnected in sequence, wherein the functional chambers are detachable and are isolated or communicated through ball valves; a sample resistivity measuring electrode module provides electrodes for thesamples so as to measure the resistivity of the samples; and a data processor is in signal connection with the sample pressure-holding grabbing chamber. The device is convenient and quick to combine,is suitable for rapid measurement of multiple sets of samples, fills the technical blank of the domestic in-situ sample resistivity measuring device for the natural gas hydrate pressure-holding coringreservoir, and has a broad application prospect.

Device and method for measuring resistivity of natural gas hydrate pressure-holding coring samples

The invention relates to a rotation type hydrate sediment sample preparation and mechanical property test device and belongs to the field of geotechnical engineering. The device comprises a triaxial apparatus main machine, a sample preparation and transfer system, a pressure control system, a temperature control system and a computer data collecting system and is characterized in that the pressurecontrol system provides pore pressure needed by a hydrate sediment sample test and pressure above a sample during sample transfer and maintains natural gas hydrate sediment confining pressure; the temperature control system controls the temperature of hydraulic oil and the temperature of the sample in a sample heat-preservation and pressure-maintaining rotary disc; the sample preparation and transfer system is used for generating hydrate sediment samples in an in-situ manner, preserving the samples and conveying the samples into the triaxial apparatus main machine; the computer data collecting system collects and processes data. The rotation type hydrate sediment sample preparation and mechanical property test device has the advantages that the hydrate sediment low-temperature high-pressure triaxial test is simplified and accelerated, multiple samples can be generated in an in-situ manner and preserved, multiple mechanical property test data can be obtained in a short time, and test result comparison and analysis are benefited.

Rotation type hydrate sediment sample preparation and mechanical property test device

The invention discloses a test method for measuring rock wave velocity in a non-contact manner in a fidelity environment. The test method comprises the steps of selecting a cylindrical container, fixedly arranging a sound wave emission probe and a sound wave receiving probe in the cylindrical container through two fixing devices, selecting a sound wave test system provided with a waveform signal generator and a signal acquisition card, connecting the sound wave test system with the sound wave receiving probe and the sound wave emission probe, injecting a liquid sound wave transmission medium into the cylindrical container, and realizing the non-contact rock wave velocity measurement in the fidelity environment. The required equipment is simple, the manufacturing cost is low, and the measurement method is simple; the non-contact rock sound wave test can be realized by using a common acoustic emission test system; the rock sound wave test efficiency can be greatly improved, the support can be provided for the later-stage continuous rock physical property test integration work, and the method has important significance for deeply researching the mechanical property of the deep in-siturock.

Test method for measuring rock wave velocity in non-contact manner under fidelity environment

The invention discloses a remodeling device and method for a marine natural gas hydrate rock core. The device comprises a thermal shrinkage jacket, a sound wave data acquisition system, an X-ray CT imaging system, a main body reaction kettle, a gas injecting system and a confining-pressure oil-bath circulating system, realizes a hydrate P-wave speed data acquisition function of the rock core, andcompares the P-wave speed with log data to judge whether hydrate remodeling is completed or not. The main body reaction kettle, the thermal shrinkage jacket, the natural rock core and end caps at thetwo ends define a main body system, so that hydrate in the rock core is remodeled and generated. The confining-pressure system realizes control on peripheral sea bottom in-situ pressure and temperature of the rock core. Under action of the rock core confining, the gas injecting system realizes control on pore pressure inside the rock core. The hydrate rock core remodeling device is applied to hydrate submarine in-situ condition remodeling of a drilling and sampling non-fidelity rock core or a decompressed natural rock core, can observe inner space distribution of the hydrate rock core in realtime through X-ray CT scanning, is simple in structure, is convenient to operate, and can repeatedly used on multiple rock cores.

Remodeling device and method for marine natural gas hydrate rock core

The invention discloses a pipeline blockage detection system based on a low-frequency sound wave, belongs to the technical field of pipeline detection, and aims at achieving the purpose of more accurate condition expression of pipeline blockage detection for blockage The pipeline blockage detection system based on the low-frequency sound wave comprises a waveform generator, a low-frequency electroacoustic transducer, a microphone and a signal resolution device, wherein the waveform generator is used for generating an excitation signal, the excitation signal is transmitted to the low-frequency electroacoustic transducer, the excitation signal is converted to a low-frequency pulse sound wave signal by the low-frequency electroacoustic transducer, and transmitted into a pipeline to form anincident wave and a reflected wave in the pipeline; and the microphone receives the sound wave signal in the pipeline and transmits the sound wave signal to the signal resolution device, the signal resolution device resolves the sound wave signal to reflect the position of a blocking object The pipeline blockage detection system based on the low-frequency sound wave has the following effect: theoccurrence position and the degree of blockage can be timely detected in an initial phase that the pipeline is incompletely blocked

Pipeline blockage detection system based on low-frequency sound wave

The invention belongs to the technical field of geochemical water-rock reaction processes, and provides an experimental device and method for simulating a CO2-water-rock reaction under a stratum condition. The experimental device comprises a high-temperature and high-pressure in-situ sampling system, a data acquisition system, an exhaust analysis system, a gas-liquid injection system and a reaction kettle system. According to the invention, dynamic change of the temperature, the pressure and the PH along with the time in the reaction process can be monitored in real time; the method can be extensively applied to rock samples with different lithology, carries out deep analysis on the pressure attenuation curve of the rock samples, obtains the gas dissolution diffusion coefficient, represents the gas dissolution diffusion in a mineralization reaction process, and carries out deep exploration on the influence of diffusion on the mineralization reaction in combination with mineral lithofacies analysis. According to the invention, overall general situation analysis can be carried out on water-rock reaction research, deep analysis of the reaction process can also be carried out by utilizing software modeling based on original data, and the overall experiment system does not use special materials and instruments, is economical and appropriate, and is convenient to popularize and apply.

Experimental device and method for simulating CO2-water-rock reaction under stratum condition

The invention discloses an ultrasonic-based oil and gas pipeline hydrate blocking monitoring device and method, and belongs to the technical field of pipeline monitoring In order to solve the problemof natural gas hydrate blocking pre-warning in an oil and gas pipeline, the ultrasonic-based oil and gas pipeline hydrate blocking monitoring device and method comprise the main points that an ultrasonic transmitting transducer is used for converting a received electrical signal into an ultrasonic signal and transmitting into the pipeline; an ultrasonic receiving transducer is used for receivingthe ultrasonic signal in the pipeline and transmitting the ultrasonic signal to a signal analyzing device; the signal analyzing device analyzes the received ultrasonic signal in the pipeline and obtains a sound velocity and a sound attenuation coefficient of the ultrasonic wave in the pipeline which is propagated in pipeline fluid to determine the formation state of hydrates in the pipeline; and the effect of achieving monitoring of pipeline hydrate blocking in the oil and gas pipeline is achieved

Ultrasonic-based oil and gas pipeline hydrate blocking monitoring device and method

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