Mineshaft multiphase flow device for simulating deep-water oil and gas production

A multi-phase flow, oil and gas extraction technology, applied in earth-moving drilling, wellbore/well components, etc., can solve the problems of narrow experimental parameters, less equipment research and development, affecting the normal operation of drilling and production systems, etc.

Active Publication Date: 2010-05-19
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

These unfavorable factors will inevitably affect the normal operation of the drilling system, and in some serious cases, even lead to serious accidents
The heat transfer and flow laws of deep-water multiphase flow are the theoretical basis for the research and development of deep-water drilling and production technology. In recent years, although various relevant units have also established some experimental devices, these devices can only be t

Method used

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  • Mineshaft multiphase flow device for simulating deep-water oil and gas production
  • Mineshaft multiphase flow device for simulating deep-water oil and gas production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: in combination with figure 1 , the present invention is further described in detail (wellbore fluid flow heat conduction simulation under deep water conditions):

[0013] The condition of simulating the ocean low temperature environment is completed by the ambient temperature maintaining flow system, and the high pressure flow environment is completed by the back pressure control system 13 of the main wellbore; the liquid part of the high pressure flow environment is mainly composed of the water tank 1, the high pressure water pump 2, and the flow fluid temperature control system It is connected with the flow meter 3. The gas part is mainly composed of a gas compressor 4, a high-pressure gas tank 5, a dryer 6 and a gas flow meter 7. The gas-liquid mixing is completed through the bubble generator 8, and then flows through the control valve 9 into the main The wellbore 10; simulated natural gas hydrate decomposition injection gas enters the main wellbore 10 ...

Embodiment 2

[0020] Embodiment 2: The present invention is applied to the heat conduction simulation of gas-liquid flow in the wellbore under deep water conditions, and is used to study the heat conduction law of the wellbore under the condition of gas production during deepwater drilling.

[0021] The technical solution is: the above other structures remain unchanged, and the simulated natural gas hydrate decomposition injection gas passes through the control system 14 and the gas injection pipeline 15 without any work. The high-pressure gas enters the gas-liquid two-phase mixer 8 from the compressor 4, the high-pressure gas tank 5, the dryer 6, and the gas flow controller 7, and the high-pressure water flows from the water tank 1, the high-pressure water pump 2, and the flow controller 3, passing through the air bubbles to generate The device 8 mixes with the gas, enters the high-pressure wellbore 10, the return pipeline 11, the gas-liquid separation tank 12, and the back pressure control...

Embodiment 3

[0022] Embodiment 3: in combination with figure 1 , the present invention is further described in detail (the simulation of the influence of natural gas hydrate phase change on the change of multiphase flow law):

[0023] Same as embodiment 2, it can be realized only by simulating the decomposition of natural gas hydrate and injecting gas to pass through the control system 14 and the gas injection pipeline 15 to start working at the same time.

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Abstract

The invention relates to a mineshaft multiphase flow device for simulating deep-water oil and gas production. In the technical scheme, the simulation of ocean low temperature environment condition is completed by an environment temperature flowing maintaining system, wherein a liquid part of high pressure flow environment is mainly formed by the connection of a water tank, a high pressure water pump, a flow liquid temperature control system and a flow meter, a gas part is mainly formed by the connection of a gas compressor, a high pressure gas tank, a drier and a gas flow meter, and a gas-liquid mixture is completed through a bubble generator and then flows through a control valve to enter into a main mineshaft; natural gas hydrate decomposed injected gas is simulated, and flows through acontrol system and a gas injection pipeline to enter into the main mineshaft; mixed liquid enters into a gas-liquid separating tank through a backflow pipeline to complete circulation. The invention has the advantages of capability of simulating deepwater low temperature oil and gas production at 1000 meters depth of water, further researches on multiphase flow law inside the mineshaft under deepwater flow condition, and establishes a multiphase flow state mechanical model of the deepwater mineshaft and a computing method.

Description

1. Technical field: [0001] The invention relates to a supercritical pipeline natural gas flow simulation and testing experiment platform, in particular to a wellbore multiphase flow device capable of simulating deep-water oil and gas exploitation under the condition of high temperature and high pressure supercritical state. 2. Background technology: [0002] As land oil and gas resources are decreasing day by day, it has become an inevitable trend for oil and gas exploration and development to turn to the sea. The development of underwater oil extraction technology not only makes deep sea oil extraction possible, but also greatly reduces the cost of deep sea oil extraction. The oil and gas drilling and production technology in deep water and ultra-deep water is becoming a research and development hotspot in various countries. At present, the maximum drilling water depth in foreign countries has exceeded 3,000 meters, while the exploration and development of oil and gas resou...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 孙宝江高永海李昊李明忠
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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