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A kind of high wall-building sealing channeling plugging agent and preparation method thereof

A plugging agent and wall-building technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as affecting the normal production of oil and water wells, large on-site construction consumption, channeling outside the cement ring pipe, etc. The effect of uniform radius, reduced corrosion and improved service life

Active Publication Date: 2018-10-02
河南瑞通能源工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the strong production and strong injection during the development process, the formation has been scoured by water injection for a long time, forming many secondary large pores; at the same time, affected by factors such as cementing quality, perforation, geological structure, workover and improper management of oil and water wells, Casing leakage or channeling outside the cement ring outside the casing will seriously affect the normal production of oil and water wells
Conventional chemical plugging agents are mostly cement-based materials, which are inherently brittle with certain defects and micro-cracks
During the plugging construction, due to the good flow deformation and poor suspension of the cement slurry, after entering the plugging site, it is easy to leak and settle before solidification, resulting in a large amount of on-site construction, low success rate and short validity period, resulting in a low plugging success rate. And there are certain security risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 5 parts of blast furnace KZ powder, 10 parts of blast furnace slag, 20 parts of G-grade high-resistance oil well cement, 20 parts of G-grade high-resistance ultra-fine oil well cement, 10 parts of sodium silicate, 0.1 part of organic silicon resin powder, 10 parts of fiber, polyanionic cellulose 2 parts of sodium, 5 parts of polyaluminum chloride, 10 parts of hollow glass microspheres, 10 parts of lignosulfonate, 3 parts of potassium humate, 3 parts of slaked lime, 1 part of sulfonated asphalt powder; the particle size of the blast furnace slag is 200 mesh; the particle size of the G-grade high-resistance oil well cement is 300 mesh.

[0017] Add all the above-mentioned required components into a three-shaft mixer and stir for 30 minutes, pack in 25 or 50 kg bags; add water in proportion to mix evenly, and prepare a plugging agent with good suspension and fluidity slurry.

Embodiment 2

[0019] 6 parts of blast furnace KZ powder, 10 parts of blast furnace slag, 30 parts of G-grade high-resistance oil well cement, 20 parts of G-grade high-resistance ultra-fine oil well cement, 15 parts of sodium silicate, 0.2 parts of organic silicon resin powder, 15 parts of fiber, polyanionic cellulose 3 parts of sodium, 6 parts of polyaluminum chloride, 10 parts of hollow glass microspheres, 10 parts of lignosulfonate, 3 parts of potassium humate, 3 parts of slaked lime, 2 parts of sulfonated asphalt powder; the particle size of the blast furnace slag is 400 mesh; the particle size of the G-grade high-resistance oil well cement is 600 mesh.

Embodiment 3

[0021] 8 parts of blast furnace KZ micropowder, 20 parts of blast furnace slag, 40 parts of G-grade high-resistance oil well cement, 40 parts of G-grade high-resistance ultra-fine oil well cement, 20 parts of sodium silicate, 0.4 parts of organic silicon resin powder, 20 parts of fiber, polyanionic cellulose 4 parts of sodium, 8 parts of polyaluminum chloride, 20 parts of hollow glass microspheres, 20 parts of lignosulfonate, 4 parts of potassium humate, 4 parts of hydrated lime, and 1 part of sulfonated asphalt powder; the particle size of the blast furnace slag is 600 mesh; the particle size of the G-grade high-resistance oil well cement is 800 mesh.

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Abstract

The invention relates to the technical field of oilfield chemistry, particularly a high-wall-building-property channeling-sealing plugging agent which is composed of blast furnace KZ micropowder, blast-furnace cinder, Grade-G high-resistance oil well cement, Grade-G high-resistance superfine oil well cement, sodium silicate, organic silicon resin micropowder, fibers, polyanionic cellulose sodium, polyaluminum chloride, hollow glass microspheres and lignosulphonate. The plugging agent is simple in application method and convenient for construction and transportation, has the advantages of high safety and reliability, favorable suspension stability, low initial viscosity, high pumpability, high plugging strength, high one-time plugging success rate and wide application conditions, and is mainly used for oil well plugging water or bottom closing water, water well duct plugging, oily water well damaged casing plugging and oily water well channeling plugging.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a highly wall-forming channeling and leakage sealing agent and a preparation method thereof. Background technique [0002] With the strong production and strong injection during the development process, the formation has been scoured by water injection for a long time, forming many secondary large pores; at the same time, affected by factors such as cementing quality, perforation, geological structure, workover and improper management of oil and water wells, Casing leakage or channeling outside the cement ring pipe outside the casing will seriously affect the normal production of oil and water wells. Conventional chemical plugging agents are mostly cement-based materials, which are inherently brittle with certain defects and microcracks. During the plugging construction, due to the good flow deformation and poor suspension of the cement slurry, after entering the plug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C09K8/467
CPCC04B28/00C04B2111/00706C04B2111/72C09K8/426C09K8/467C09K2208/08C04B18/141C04B22/08C04B24/42C04B24/383C04B22/12C04B14/18C04B24/18C04B24/04C04B22/064C04B24/36
Inventor 王焰魁姚花平丁金岗
Owner 河南瑞通能源工程技术有限公司
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