Natural gas hydrate heat transfer performance testing apparatus used in X-ray CT equipment

Abstract

The invention relates to a natural gas hydrate heat transfer performance testing apparatus used in X-ray CT equipment. The invention belongs to the technical field of petroleum scientific research apparatus. The apparatus can be used for simulating in-situ formation of rock core natural gas hydrate, and can be arranged on a rotary object stage of X-ray CT equipment for testing the heat transfer performance. A designed pressure is 0-20MPa, and a designed temperature is -20 to 30 DEG C. For reducing the inferences on X-ray CT equipment imaging, a titanium alloy material is adopted in the integral apparatus. Also, the apparatus is designed as a double-layer sleeved cylinder structure. With an inner cylinder, pressure for natural gas hydrate in-situ formation is ensured. With a circulated cooling agent in the interlayer, the temperature of the inner cylinder is controlled. Multi-point measuring thermal resisters are annularly arranged in the inner cylinder. Signal intensity of collected X-ray CT images and data information acquired by the thermal resisters are analyzed, such that related conclusion of the natural gas hydrate heat transfer performance is obtained. The structure of apparatus is reasonably designed, such that equipment parameter requirements of the apparatus are satisfied. The function is comprehensive, and the operation is simple.

Description

Technical field [0001] The invention relates to a natural gas hydrate heat transfer performance test device for X-ray CT equipment, and belongs to the technical field of petroleum scientific research instruments. Background technique [0002] X-ray CT (X-ray Computed Tomography) technology is a computerized X-ray tomography technology that sends and receives ray signals through X-ray generators and X-ray detectors, and uses materials of different densities to absorb and transmit X-rays The rate is different, after the data is processed by an electronic computer, a tomographic or stereo image of the object to be detected can be obtained. This technology can be used to analyze natural cores, simulated core natural gas hydrate skeleton framework and basic physical properties such as porosity, permeability, saturation, etc. It can also analyze the gas and water flow and heat transfer characteristics during the formation and decomposition of natural gas hydrates Carry out research an...

AI Technical Summary

Problems solved by technology

Traditional studies on the basic physical properties and flow and heat transfer characteristics of natural gas hydrate usually use a water bath to control the temperature to achieve the temperature required for the formation or decomposition of natural gas hydrate. Quality requirements, and inevitably cause greater interference to X-ray imaging

In addition, the traditional gas hydrate heat transfer performance test usually only relies on data collection, which is rarely combined with visual instruments and equipment, and it is impossible to study the heat transfer performance intuitively and three-dimensionally from the micro scale

At present, there is no report on the test device for the heat transfer performance of natural gas hydrate suitable for X-ray CT equipment

Images