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Device for testing influence of hydration heat of cement paste/drilling fluid on stability of natural gas hydrate

A technology of stability testing and drilling fluid, which is applied in the field of testing equipment for the influence of heat of hydration of cement slurry/drilling fluid on the stability of natural gas hydrate, which can solve the problems of formula applicability, the influence of natural gas hydrate, and the inability to visually observe the reactor body Internal conditions and other issues, to achieve the effect of accurate experimental results, good thermal sealing, and intuitive experimental results

Active Publication Date: 2020-12-15
SOUTHWEST PETROLEUM UNIV +1
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AI Technical Summary

Problems solved by technology

[0004] At present, the conditions for the stable existence of natural gas hydrate are mostly simulated and calculated by digital simulation technology for pressure and temperature, but there will always be certain errors between the set parameters and the on-site construction environment, so that the results cannot always perfectly fit the construction In the field, the formula obtained by numerical fitting is relatively consistent under certain conditions. If the mining site is changed or the conditions are different, the applicability of the formula will be problematic.
[0005] For simulating the formation and decomposition of natural gas hydrate indoors, there are the following defects: it is impossible to visually observe the internal conditions of the reactor body; the detection and control of pressure and temperature lack certain accuracy; the gas-liquid contact only exists at the gas-liquid interface, and the contact area Confinement has a certain impact on the formation of gas hydrates

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  • Device for testing influence of hydration heat of cement paste/drilling fluid on stability of natural gas hydrate
  • Device for testing influence of hydration heat of cement paste/drilling fluid on stability of natural gas hydrate
  • Device for testing influence of hydration heat of cement paste/drilling fluid on stability of natural gas hydrate

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Embodiment Construction

[0028] The present invention will be further described below according to the accompanying drawings, so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of specific implementations. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, they are all within the scope of protection. List.

[0029] see figure 1 .

[0030] Cement slurry / drilling fluid heat of hydration affects natural gas hydrate stability test device, including gas source 1, pressure regulating valve 2, gas mass flow meter 3, pressure gauge 4, constant temperature water tank 6, water source switch 7, visual reactor 8, Magnetic stirrer 9, control panel 13, temperature data processing unit 14, pressure data processing unit 15, computer 16, heating jacket 23, pressure sensor 24, temperature sensor 25...

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Abstract

The invention relates to a device for testing the influence of hydration heat of cement paste / drilling fluid on the stability of natural gas hydrate. The device comprises a gas source 1, a pressure regulating valve 2, a gas mass flow meter 3, a pressure gauge 4, a constant-temperature water tank 6, a water source switch 7, a visual reaction kettle 8, a control panel 13, a computer 16, a heating sleeve 23, pressure sensors 24 and temperature sensors 25; the visual reaction kettle is sequentially connected with the pressure gauge, the gas mass flow meter, the pressure regulating valve and the gas source, and is also connected with the constant-temperature water tank through the water source switch; the heating sleeve is arranged outside the reaction kettle; and the plurality of temperature sensors and pressure sensors are distributed at two ends of the reaction kettle respectively. When the device is used for well cementation, a cement paste cylinder is fixed at the central position in the kettle body, and cement paste is filled in the paste cylinder; and when the device is used for drilling, a drilling fluid circulating pipeline is arranged at the central position in the kettle bodyand connected with a drilling fluid pumping pipeline. The testing process is simple and rapid, and the device can be used for researching the influence rule of hydration heat release of cement pasteand drilling fluid on the stability of the natural gas hydrate.

Description

technical field [0001] The invention relates to a device for measuring and observing the stability of natural gas hydrate under specific conditions, in particular to a device for testing the influence of cement slurry / drilling fluid hydration heat on the stability of natural gas hydrate. Background technique [0002] In the process of natural gas transportation, we often encounter the problem of blockage of the circulation pipeline due to natural gas entering the fluid to form hydrates in some special positions in the wellbore and pipeline, or the pipeline formed by the accumulation of natural gas in a specific area due to the large drop of the pipeline clogged. [0003] In well cementing operations, especially in deep sea well cementing, whether the hydration heat of cement slurry can damage the stability of gas hydrate layer is a problem that has been paid close attention to in the field of petroleum exploitation. If the stability of the gas hydrate in the hydrate layer i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22G01N25/02
CPCG01N33/225G01N25/02G01N25/20G01N25/48
Inventor 程小伟李进乐宏陈力力马勇倪修成张春梅刘开强左天鹏黄盛梅开元张高寅
Owner SOUTHWEST PETROLEUM UNIV
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