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Plugging agent, preparation method and application thereof

A technology of plugging agent and coagulation accelerator, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve the effects of shortening curing time, reducing economic losses, and short curing time

Active Publication Date: 2022-02-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a plugging agent and its preparation method and application, which can solve the problems of increasing the strength of the lost leakage layer and improving the success rate of plugging

Method used

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  • Plugging agent, preparation method and application thereof
  • Plugging agent, preparation method and application thereof

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preparation example Construction

[0037] In a second aspect, the embodiments of the present invention provide a method for preparing the above-mentioned leakage stoppage agent, the preparation method comprising:

[0038] Step 1: According to the weight percentage of each component, tap water is added into the mixing tank.

[0039] The weight percentage of each component is 2%-4% of consolidatable quartz sand, 1%-3% of coagulant, 3%-5% of latex polymer, 3%-5% of sheet material, and 0.2% of fiber material ~0.3%, oil well cement 23%~29%, and tap water as the balance. According to the weight percentages of the above-mentioned components, a certain weight percentage of tap water is added into the mixing tank.

[0040] Step 2: Add the latex polymer to the mixing tank and mix well.

[0041] The specific process of this step is as follows: add the latex polymer with a weight percentage of 23% to 29% into the stirring tank added with tap water, and stir evenly.

[0042]Wherein, the stirring time can be set and chang...

Embodiment 1

[0050] This embodiment provides a leak-stopping agent, which is prepared by the following method:

[0051] Add 600 grams of tap water to the mixing tank; add 30 grams of latex polymer to the mixing tank and stir evenly; add 3 grams of fiber material to the mixing tank and stir evenly; add 290 grams of oil well cement and 22 grams of Consolidate quartz sand, 30 grams of flake material and 25 grams of coagulant, stir and mix evenly to obtain the plugging agent provided in this embodiment.

Embodiment 2

[0053] This embodiment provides a leak-stopping agent, which is prepared by the following method:

[0054] Add 610 grams of tap water to the mixing tank; add 34 grams of latex polymer to the mixing tank and stir evenly; add 3 grams of fiber material to the mixing tank and stir evenly; add 273 grams of oil well cement and 20 grams of Consolidate quartz sand, 30 grams of flake material and 30 grams of coagulant, stir and mix evenly to obtain the plugging agent provided in this embodiment.

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Abstract

The invention discloses a plugging agent, a preparation method and an application thereof, and belongs to the technical field of oil field plugging. A plugging agent provided by an embodiment of the present invention includes the following components in weight percentage: 2% to 4% of consolidatable quartz sand, 1% to 3% of coagulant, 3% to 5% of latex polymer, 3% to 5% of sheet material, 0.2% to 0.3% of fiber material, 23% to 29% of oil well cement, and the balance is tap water. The consolidated quartz sand is consolidated quartz sand treated with a thermosetting resin. The plugging agent is added with consolidatable quartz sand, coagulant and latex polymer, and cooperates with other components to shorten the curing time of the plugging agent and increase the curing strength of the plugging agent. The plugging agent provided by the embodiment of the present invention has a simple on-site preparation process, safe construction, short curing time, and high consolidation strength. Using the plugging agent for plugging has a high plugging success rate and reduces economic losses caused by plugging failures .

Description

technical field [0001] The invention relates to a plugging agent, a preparation method and an application thereof, and belongs to the technical field of oil field plugging. Background technique [0002] The unconsolidated sandstone oil and water wells are scoured by water injection for a long time, forming high permeability zones and even large water flow channels in the strata. In addition, when the stratum is loose and the water injection pressure is high, lost circulation often occurs. Lost circulation not only consumes drilling fluid and prolongs drilling time, but also causes drilling fluid to leak into the formation, which may contaminate the formation. Therefore, after lost circulation occurs, well site staff need to plug the lost zone in time. [0003] Currently, the commonly used plugging agents are mainly solid particle plugging agents. The solid particle plugging agent is mainly to simply accumulate various solid particles, and to plug the leakage through the br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B20/10C09K8/467
CPCC04B28/02C04B20/1037C09K8/467C09K8/426C04B2111/00724C04B14/06C04B22/124C04B24/122C04B24/2611C04B14/20C04B18/26C04B16/0633
Inventor 邹小萍于永生刘贺何磊于浩洋齐行涛曹作为王浩高鸿斌张秋红李秀丽
Owner PETROCHINA CO LTD
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