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Device and method for researching cement sheath channeling plugging law of oil well

An oil well cement and regular technology, applied in construction and other directions, can solve the problem of oil well water plugging that cannot consider the nature of underground channeling, and achieve the effect of improving plugging effect, improving utilization rate and reducing loss.

Active Publication Date: 2018-11-16
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0005] An object of the present invention is to provide a device for studying the plugging laws of oil well cement ring channeling. This method is used to solve the problem that the current water plugging of oil wells cannot consider the nature of underground channeling. Another object of the present invention is to provide this The method of experimental research on the device for studying the plugging law of oil well cement ring channeling

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  • Device and method for researching cement sheath channeling plugging law of oil well
  • Device and method for researching cement sheath channeling plugging law of oil well
  • Device and method for researching cement sheath channeling plugging law of oil well

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, the present invention will be further described:

[0025] Such as figure 1 As shown, the device for studying the plugging law of oil well cement sheath channels includes a plugging agent injection device, an oil well model 5, a rock core 7, bismuth-lead-tin alloy sheets, and a steel column. The plugging agent injection device consists of an advection pump 1, an intermediate container 2. The pressure gauge 3 and the six-way valve 4 are composed. The advection pump 1 is connected to the intermediate container 2. The intermediate container 2 is connected to the oil well model 5 through the six-way valve 4. The pressure gauge 3 is installed on the six-way valve 4. The rock core 7 has two Two rock cores 7 have different permeability, and each rock core 7 is respectively used to connect with the perforation of the oil well model 5, and the rock core 7 can be used to simulate formation conditions with different permeability. Suc...

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Abstract

The invention relates to a device and method for researching a cement sheath channel plugging law of an oil well. The device for researching the cement sheath channel plugging law of the oil well comprises a plugging agent injecting device, an oil well model, a plurality of sets of bismuth-lead-tin alloy sheets and a steel column. A middle container of the plugging agent injecting device is connected with the oil well model, and perforation holes of the oil well model are connected with rock cores with different permeability. An outer tube of the oil well model is formed by two semicircular tubes in a covered mode, an inner tube and the outer tube are coaxially screwed and fixed between a top cover and a base, and steel columns are used for plugging the perforation holes. The multiple setsof bismuth-lead-tin alloy sheets with the width being 25 mm comprise a set of multiple bismuth-lead-thin alloy sheets with the same thickness and length and in different bent shapes. According to thedevice and method, the gel forming conditions of all plugging agents in various types of cracks can be observed, and the migration law of the plugging agents in the rock cores and a cement sheath ina pore space is observed.

Description

technical field [0001] The invention relates to the technical field of oil production engineering, in particular to a device and method for studying the plugging rule of oil well cement sheath channels. Background technique [0002] In crude oil extraction operations, oil wells produce water, which has a great impact on economic benefits, and may even cause some high-yield oil wells to be transformed into oil wells with no industrial value. If measures are not taken in time for the water output from the oil well, dead oil areas of water traps may appear in the formation, and the injected water will bypass, thereby reducing the recovery rate and causing great waste. The water outflow from the oil well may also damage the reservoir structure and cause sand production in the oil well; the water outflow from the oil well will also increase the relative density of the liquid, increase the oil pressure at the bottom of the well, and turn the gushing well into a pumping well; in ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/005
CPCE21B47/005
Inventor 傅程黄斌宋考平张宇赵博文代亭阁
Owner NORTHEAST GASOLINEEUM UNIV
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