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Hydrate well-drilling overflow simulating and monitoring experiment device

An experimental device, hydrate technology, applied in the direction of measuring device, vibration measurement in fluid, measurement, etc., can solve problems such as difficulty in hydrate mining, and achieve the effect of clear cycle process, easy operation and easy assembly

Inactive Publication Date: 2018-09-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the extremely complicated downhole situation, there has been no effective method to accurately monitor the overflow for a long time, which has caused many difficulties in the production of hydrates

Method used

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  • Hydrate well-drilling overflow simulating and monitoring experiment device
  • Hydrate well-drilling overflow simulating and monitoring experiment device
  • Hydrate well-drilling overflow simulating and monitoring experiment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021]The main structure of this embodiment includes five functional parts: a wellbore simulation system, a signal monitoring system, a drilling fluid circulation system, a hydrate generation and decomposition system, and a computer information processing system. The wellbore simulation system includes a plexiglass inner tube 1 and a plexiglass outer tube 2. Internal rotating motor 4, drill pipe 5 and check valve 3, signal monitoring system includes Doppler signal generator 25, Doppler signal receiver 26 and ultrasonic Doppler detector 29, drilling fluid circulation system includes drilling Liquid storage tank 6, plunger pump 7, drilling fluid flow meter 8 and drilling fluid circulation pipeline pressure gauge 9, the hydrate formation and decomposition system includes gas cylinder 10, gas storage tank 12, gas compressor 15, gas flow meter 14, Pressure relief valve 11, cold water treatment system 13, water injection port 19, safety valve 20, reactor 16, thermometer 18, generatio...

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Abstract

The invention belongs to the technical field of offshore oil and gas exploitation and relates to a hydrate well-drilling overflow simulating and monitoring experiment device. A shaft is designed according to the principles of geometrical similarity and dynamic similarity; a well-drilling fluid storage tank is used for providing a fluid in the experimental process, and a gas storage tank and a gascompressor are used for providing gas in the experimental process; generating of hydrates is accelerated through the stirring effect of a drilling rod under the non-heating condition, heaters on the drilling rod are started to enable the hydrates to be decomposed, and the states of the hydrates circularly flowing in the shaft and an annulus along with the well-drilling fluid are monitored; and according to collected hydrate generation and decomposition data, the quantification corresponding relation between Doppler signals and the section gas volume fraction is determined, and early overflow monitoring during hydrate well-drilling is achieved. The hydrate well-drilling overflow simulating and monitoring experiment device is simple in structure and easy to assemble, the whole circulating process is clear, and experimental operation is convenient to conduct.

Description

Technical field: [0001] The invention belongs to the technical field of offshore oil and gas development, and relates to a hydrate drilling well control simulation experiment device, in particular to a hydrate drilling overflow simulation monitoring experiment device, which is formed and decomposed according to the hydrate formation and decomposition collected by an ultrasonic Doppler detector To determine the quantitative correspondence between Doppler signal and cross-sectional gas content, to realize the early monitoring of hydrate drilling overflow, and finally to realize the simulation and monitoring of hydrate drilling well control. Background technique: [0002] Hydrate resources are abundant and have great prospects for resource development. However, the exploitation of gas hydrate involves multiphase transfer and transformation, which may bring a series of geological and environmental problems. So far, there is no mature technology for gas hydrate development. Hydra...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B47/06E21B43/01E21B43/24G01H3/04
CPCE21B41/0099E21B43/01E21B43/24E21B47/00E21B47/06G01H3/04
Inventor 马睿林英松尹邦堂
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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