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Simulation experimenting device and method for high-temperature and high-pressure reinforced well wall drilling fluid

A simulation experiment device, high temperature and high pressure technology, applied in wellbore/well components, earthwork drilling, measurement, etc., can solve the problems of invariable fracture width, inability to simulate permeable formations, etc., achieve small experimental errors, complete functions, Simple to use effects

Active Publication Date: 2015-07-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a high-temperature and high-pressure borehole wall strengthening drilling fluid simulation experiment device, which can simulate different formation conditions (such as temperature, pressure, permeability, etc.), variable or fixed The process of leakage and plugging of wide fractures, monitoring key parameters such as drilling fluid loss rate, pressure bearing capacity of plugging zone, and fracture width variation, and realizing the evaluation experiment of drilling fluid strengthening effect on wellbore wall, overcame the inability of conventional drilling fluid plugging experiment devices. Insufficient in simulating permeable formations and invariable fracture widths

Method used

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  • Simulation experimenting device and method for high-temperature and high-pressure reinforced well wall drilling fluid
  • Simulation experimenting device and method for high-temperature and high-pressure reinforced well wall drilling fluid
  • Simulation experimenting device and method for high-temperature and high-pressure reinforced well wall drilling fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as Figure 1-2 shown.

[0045] A high-temperature and high-pressure borehole wall strengthening drilling fluid simulation experiment device, including a fracture leakage tank system, a drilling fluid delivery system and an industrial computer 6;

[0046] The fracture leakage kettle body system includes a fracture leakage kettle body 1, a pressurizing device, a rock core simulation device, a center pipe and a heating belt 20; the heating belt 20 and the rock core simulation device are arranged on the fracture leakage kettle body; the rock core simulation device is provided with The filtrate outlet 26 on the fracture surface and the filtrate outlet 27 at the tip of the fracture; the pressurizing device is connected to the core simulation device; the central pipe is installed through the core simulation device;

[0047] The heating zone 20 can fully simulate the temperature environment of complex formations; during the experiment, the test drilling fluid can be heate...

Embodiment 2

[0055] A high-temperature, high-pressure borehole wall strengthening drilling fluid simulation experiment device as described in Example 1, the difference is that: the upper center pipe 29 is connected to the delivery pipeline 11 through a high-pressure valve 12, and the heating belt 20 is connected with a temperature controller . By switching the high-pressure valve 12, functions such as circulating the air in the pipeline 11 and releasing pressure can be realized; the temperature controller ensures that the maximum experimental temperature of the heating belt 20 reaches 150°C, and controls the temperature control accuracy to ±1°C.

Embodiment 3

[0057] A high-temperature, high-pressure borehole wall strengthening drilling fluid simulation experiment device as described in Example 1, the difference is that: the plane where the inner side of the upper fluid loss medium sheet is located is on the same plane as the plane where the end of the upper central pipe 29 is located; The plane where the inside of the filter loss medium sheet is located is in the same plane as the plane where the end of the lower central pipe 30 is located; the upper filter loss medium sheet and the lower filter loss medium sheet are sealed with the central hole; the upper filter loss medium sheet and lower filter loss media pieces are ceramic or stainless steel. Ceramic or stainless steel materials are used to simulate fracture surfaces in formations with different permeability.

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Abstract

A simulation experimenting device for high-temperature and high-pressure reinforced well wall drilling fluid comprises a crack leaking autoclave body system, a drilling fluid conveying system and an industrial control computer. By means of the device, the leaking and plugging process of cracks with variable or fixed widths under different formation conditions such as temperatures, pressures and permeation rates, the key parameters such as the drilling fluid leaking speed, the pressure bearing capability of a plugging belt and the variation of the widths of the cracks can be monitored, a drilling fluid reinforced well wall action evaluation experiment can be achieved, and the defects that a conventional drilling fluid leakage plugging experimenting device cannot simulate permeating formations and is unchangeable in width of cracks are overcome.

Description

Technical field: [0001] The invention relates to a high-temperature, high-pressure well wall strengthening drilling fluid simulation experiment device and method, and belongs to the technical field of simulation experiment devices for drilling fluid leakage prevention and plugging. Background technique: [0002] With the continuous improvement of the exploration and development of oil and gas resources, conventional oil and gas resources are becoming less and less, and the scope of drilling and development has gradually moved to complex formations such as deep and ultra-deep layers, deep ocean water, and unconventional reservoirs. The problem of drilling fluid loss has become increasingly prominent, and persistent Lost circulation, leakage and spillage in the same layer, collapse of the well wall, and even the scrapping of the wellbore have caused major economic losses. Studies have shown that the essential reason for the above problems lies in the low pressure bearing capac...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/10
Inventor 邱正松刘均一黄维安钟汉毅宋丁丁暴丹徐建根
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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