CN103712897B - Sand-carrying performance test device for fracturing liquid by adopting high-speed photography and digital image technologies - Google Patents
Sand-carrying performance test device for fracturing liquid by adopting high-speed photography and digital image technologies Download PDFInfo
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- CN103712897B CN103712897B CN201410006547.2A CN201410006547A CN103712897B CN 103712897 B CN103712897 B CN 103712897B CN 201410006547 A CN201410006547 A CN 201410006547A CN 103712897 B CN103712897 B CN 103712897B
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Abstract
The invention discloses a sand-carrying performance test device for fracturing liquid by adopting high-speed photography and digital image technologies. The sand-carrying performance test device mainly comprises an air compressor air storage tank, a temperature sensor, a liquid storage tank, a temperature controller, a high-speed photography system, a digital image processing system, a flowmeter, a needle valve, a visible simulated crack sand suspension system, a soft light box and a liquid collection tank. According to the sand-carrying performance test device for the fracturing liquid by adopting the high-speed photography and digital image technologies, sand-carrying fracturing liquid with different flowing speeds and different temperatures passes through the visible simulated crack sand suspension system by a method for driving liquid to flow through constant-pressure air; the high-speed photography system is used for catching a motion trace of sand in a crack; the digital image processing system is used for determining a settling trace and a settling speed of the sand to obtain distribution of the concentration of the suspended sand along the crack. The sand-carrying performance test device has a reliable theory, is easy to operate, can accurately test both the settling speeds of sand particles with different particle sizes in fracturing liquid under different temperatures and different flowing speeds according to different sand ratios and the concentration distribution of the sand particles in the simulated crack, and has a good market prospect.
Description
Technical field
The present invention relates to a kind of fracturing liquid of high-speed photography and Digital image technology that uses and take sand performance testing device.
Background technology
Current known fracturing liquid is taken sand, suspension property test evaluation universal method for measuring the free-falling velocity of proppant particles in fracturing liquid, because of the fracturing fluid temperature and flow velocity have a great impact its suspension property, so particle sinking speed index only can macroscopic view, indirectly reflect the suspending power of liquid, can not accurately reflect the settling velocity of sand grains when taking sand fracturing liquid flows in crack with different temperature and flow velocity, more can not test outstanding sand concentration along the distribution in crack.
Summary of the invention
The object of the present invention is to provide a kind of fracturing liquid of high-speed photography and Digital image technology that uses to take sand performance testing device, this principle of device is reliable, easy and simple to handle, can not only accurately test different-grain diameter sand grains and compare the settling velocity in the fracturing liquid of different temperatures, different in flow rate with different sand, can also accurately test the CONCENTRATION DISTRIBUTION of sand grains in simulation fracture.
For reaching above technical purpose, the invention provides following technical scheme.
The present invention drives the mode of liquid flow by pressure-sustaining gas, what make different in flow rate and temperature takes sand fracturing liquid by the outstanding sand system in visual simulation crack, by high speed video system, catch the movement locus of sand grains in crack, by digital image processing system, just can determine sedimentation track and the settling velocity of sand grains.The sand grains that can take by high-speed camera is equally evenly distributed image in simulation fracture, the water body color gray scale absorption of light being shown with scattering process according to sand is different, use Digital Image Processing, can show that outstanding sand concentration, along the distribution in crack, has wide market outlook.
Use the fracturing liquid of high-speed photography and Digital image technology to take sand performance testing device, mainly by air compressor air storage tank, temperature sensor, fluid reservoir, temperature controller, high speed video system, digital image processing system, flowmeter, needle-valve, the outstanding sand system in visual simulation crack, soft box, receipts flow container, formed.Described fluid reservoir is equipped with takes sand fracturing liquid, its two ends are connected with temperature sensor and temperature controller, fluid reservoir top connects air compressor air storage tank, described air compressor air storage tank is taken sand fracturing liquid with pressure-sustaining gas driving and is flowed, bottom is connected the outstanding sand system in visual simulation crack and is received flow container by pipeline, on the pipeline between the outstanding sand system in described fluid reservoir and visual simulation crack, has flowmeter and needle-valve; Described high speed video system be take soft box and as light source, the outstanding sand system in visual simulation crack is observed and taken, and described high speed video system connects digital image processing system.
Described visual simulation crack hangs sand system, by two parallel placements, sizes, be 500mm * 1500mm, by the organic glass panel of vertical and horizontal scale, formed, spacing between two panels is 5mm, and the narrow crack passage forming comes simulated formation crack.
The present invention is divided into two systems: pipeline and results of fracture simulation system and high-speed camera and digital image processing system.
Pipeline and results of fracture simulation system: employing volume is 50L, design pressure is that 1MPa storage tank is as test liquid reservoir vessel (band electromagnetic stirrer in tank, tank body band safety valve, tensimeter, liquid level gauge).Container top is communicated with the portable pressure-adjustable air compressor machine of maximum working pressure (MWP) 0.5Mpa, by air compressor machine, provides constant voltage source of the gas to drive the fracturing liquid in fluid reservoir to flow.The temperature of mini-frac liquid adopts well heater, temperature transmitter, temperature controller to control.Control method is: on temperature controller, set the target temperature of test, by temperature transmitter, survey tank build-in test liquid temp, when test fluid temperature is lower than setting value, the well heater that temperature controller is controlled fluid reservoir outer wrap is heated to setting value.And by the way at fluid reservoir and pipeline outer wrapping thermofin, keep test process constant temperature.Need the sand fracturing liquid sample of taking of test to drive in pipeline and flow by gaseous tension, after liquid flows out from liquid storage container, entering internal diameter is the stainless steel straight length of 10mm, the flow velocity of liquid is by noticeable degree (can control reynolds number range is 1000-100000), and be 500mm * 1500mm by flowing into two parallel placement sizes after flowmeter metering, there is the organic glass panel of vertical and horizontal scale.Spacing between two panels is 5mm, forms narrow crack passage and comes simulated formation crack.The characteristics of motion and the distribution of sand in simulation fracture, can clearly be observed and be taken by transparent organic glass panel.
High-speed camera and digital image processing system: high speed video system adopts the Phantom product line of U.S. Vision Research company research and development, the resolution of the sensor based on CMOS is adjustable, reach as high as 1600 * 1200, frame frequency under ultimate resolution reaches 1000pps, frame frequency under low resolution reaches 160000pps, can clearly photograph the moment moving image of sand grains.High-speed camera is according to experiment demand reversible-light shooting, the brightness of light is had to higher requirement, and light source is used special soft box, the light flicker free that becomes clear, transmitted light intensity is evenly distributed, with the shooting quality that guarantees that the sand grains characteristics of motion and outstanding sand distribute along fracture orientation.High speed video system catches the movement locus of sand grains in crack, by digital image processing system, just can determine sedimentation track and the settling velocity of sand grains.Equally, the sand grains that can take by high-speed camera is evenly distributed image in simulation fracture, according to silt to the absorption of light and scattering process, transmitted light intensity will weaken by exponential law than incident intensity, and outstanding sand concentration is larger, weaken more severely, show as water body color gray scale different.Thus, by digital image processing system, use Digital Image Processing, draw corresponding intensity profile, then according to outstanding sand concentration and the gray-scale relation demarcated, just can show that outstanding sand concentration is along the distribution in crack.
Compared with prior art, the present invention has following beneficial effect:
(1) sand grains that the present invention can accurately test different-grain diameter with different sand normal temperature-100 ℃), different in flow rate (reynolds number range: the settling velocity in fracturing liquid 1000-100000) than in different temperatures (temperature range:; And draw the CONCENTRATION DISTRIBUTION of sand grains in simulation fracture in test settling velocity.
(2) the present invention uses the technological means of high-speed camera and Digital Image Processing, not only overcome current known fracturing liquid take sand, suspension property test evaluation method only can macroscopic view, indirectly reflect the deficiency of the suspending power of liquid, the settling velocity of sand grains when Measurement accuracy is taken sand fracturing liquid and flowed in crack with different temperature and flow velocity, can also simultaneously accurately draw the CONCENTRATION DISTRIBUTION of sand grains in simulation fracture, reflect that more accurately, all sidedly fracturing liquid takes sand, suspension property in flowing in stratum.
Accompanying drawing explanation
Fig. 1 is the structural representation that the fracturing liquid of utilization high-speed photography and Digital image technology is taken sand performance testing device.
1 air compressor air storage tank in figure, 2 temperature sensors, 3 fluid reservoirs, 4 temperature controllers, 5 high speed video systems, 6 digital image processing systems, 7 flowmeters, 8 needle-valves, 9 visual simulation cracks hang sand system, 10 soft boxes, 11 receive flow container.
Embodiment
Below in conjunction with accompanying drawing, further illustrate the present invention.
Referring to Fig. 1.
Use the fracturing liquid of high-speed photography and Digital image technology to take sand performance testing device, mainly by air compressor air storage tank 1, temperature sensor 2, fluid reservoir 3, temperature controller 4, high speed video system 5, digital image processing system 6, the outstanding sand system 9 in visual simulation crack, receipts flow container 11, formed.Described fluid reservoir 3 is equipped with takes sand fracturing liquid, its two ends are connected with temperature sensor 2 and temperature controller 4, fluid reservoir top connects air compressor air storage tank 1, bottom is connected the outstanding sand system 9 in visual simulation crack and is received flow container 11 by pipeline, on the pipeline between the outstanding sand system in described fluid reservoir and visual simulation crack, has flowmeter 7 and needle-valve 8; Described high speed video system 5 be take soft box 10 as light source, and the outstanding sand system 9 in visual simulation crack is observed and taken, and described high speed video system 5 connects digital image processing system 6.
Need the sand fracturing liquid sample of taking of test to be contained in fluid reservoir 3, the pressure-driven liquid by air compressor air storage tank 1 interior gas enters straight length.The temperature of whole device is controlled by the temperature controller 4 of fluid reservoir, can need to change according to test.The flow velocity of liquid is controlled by the needle-valve 8 of test pipeline section, and is measured by flowmeter 7.After metering, enter the outstanding sand system 9 in visual simulation crack.In the outstanding sand system in visual simulation crack, by high speed video system 5, at soft box 10, under the condition for light source, take sedimentation track and the distribution image of sand grains, then by digital image processing system 6, analyze filmed image, draw the settling velocity of sand grains and the CONCENTRATION DISTRIBUTION in simulation fracture.Liquid after test finally flows into receives flow container 11.
Claims (1)
1. use the fracturing liquid of high-speed photography and Digital image technology to take sand performance testing device, mainly by air compressor air storage tank (1), temperature sensor (2), fluid reservoir (3), temperature controller (4), high speed video system (5), digital image processing system (6), visual simulation crack hangs sand system (9), receiving flow container (11) forms, it is characterized in that, described fluid reservoir (3) is equipped with takes sand fracturing liquid, its two ends are connected with temperature sensor (2) and temperature controller (4), fluid reservoir top connects air compressor air storage tank (1), bottom is connected the outstanding sand system (9) in visual simulation crack and is received flow container (11) by pipeline, on pipeline between the outstanding sand system in described fluid reservoir and visual simulation crack, there are flowmeter (7) and needle-valve (8), it is light source that described high speed video system (5) be take soft box (10), and the outstanding sand system (9) in visual simulation crack is observed and taken, and described high speed video system (5) connects digital image processing system (6), described visual simulation crack hangs sand system, by two parallel placements, sizes, be 500mm * 1500mm, by the organic glass panel of vertical and horizontal scale, formed, spacing between two panels is 5mm, and the narrow crack passage forming comes simulated formation crack, described air compressor air storage tank (1) is taken sand fracturing liquid with pressure-sustaining gas driving and is flowed.
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| CN201410006547.2A CN103712897B (en) | 2014-01-07 | 2014-01-07 | Sand-carrying performance test device for fracturing liquid by adopting high-speed photography and digital image technologies |
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| CN201410006547.2A CN103712897B (en) | 2014-01-07 | 2014-01-07 | Sand-carrying performance test device for fracturing liquid by adopting high-speed photography and digital image technologies |
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| CN103712897B true CN103712897B (en) | 2014-11-05 |
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| CN104237460B (en) * | 2014-07-09 | 2016-05-25 | 中国石油大学(华东) | A kind of device and application thereof of simulating the complicated seam of volume fracturing net proppants settle down rule |
| CN104929618B (en) * | 2015-06-18 | 2018-02-06 | 西安石油大学 | One kind takes sand fracturing fluid transported simulation research device in perforation tunnel |
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| CN112686883B (en) * | 2021-01-11 | 2022-02-01 | 西南石油大学 | Fracturing fluid sand suspension capacity evaluation method based on image recognition |
| CN113563860B (en) * | 2021-08-22 | 2022-04-26 | 大庆永铸石油技术开发有限公司 | Preparation method of slickwater fracturing fluid system for shale oil reservoir and pumping method thereof |
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