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Low temperature magnesium oxysulfide thermosetting resin cementitious system and preparation method thereof

A technology of magnesium oxysulfide thermosetting and resin glue, which is applied in the field of oil and gas well cementing, can solve problems such as insufficient performance of Portland cement, improve the quality of annular sealing, solve the problem of high brittleness, and improve the sealing performance of cement ring. Effect

Inactive Publication Date: 2019-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of insufficient performance of the above-mentioned Portland cement existing in the prior art, the present invention proposes a low-temperature magnesium oxysulfide thermosetting resin gelling system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 300g of lightly burned magnesium oxide, 150g of magnesium sulfate, 6g of polyvinyl alcohol fluid loss agent FSAM-H (Dezhou Continental Shelf Company), 20g of low temperature coagulant citric acid, and 1.5g of antifoaming agent tributyl phosphate, Phenolic resin emulsion (CNOOC Changzhou Paint Chemical Research Institute Co., Ltd.) 60g, resin curing agent phosphoric acid 30g, fresh water 200g;

[0031] (2) Mix magnesium sulfate, resin, resin curing agent, defoamer, low temperature setting agent, fluid loss agent, and fresh water to obtain a mixed liquid;

[0032] (3) In the mixing container, add the mixed liquid, the agitator rotates at a low speed (4000±200 rpm), and the lightly burned magnesia powder is added within 15 seconds, and the cover of the agitator (12000±500 rpm), continue to stir for 35 seconds, stir evenly to obtain a low-temperature magnesium oxysulfide thermosetting resin gel system. According to GB-T 19139-2012 oil well cement test method, the dens...

Embodiment 2

[0034] (1) Weigh 350g of lightly burned magnesium oxide, 170g of magnesium sulfate, 6g of polyvinyl alcohol fluid loss agent FSAM-H, 35g of low temperature coagulant citric acid, 1.5g of defoamer tributyl phosphate, and 50g of phenolic resin emulsion. Resin curing agent phosphoric acid 25g, iron ore powder 400g, fresh water 250g;

[0035] (2) Mix magnesium sulfate, resin, resin curing agent, defoaming agent, low temperature setting agent, polyvinyl alcohol fluid loss agent, and fresh water to obtain a mixed liquid, and set it aside;

[0036] (3) Mix lightly burnt magnesia and iron ore powder evenly, and set aside;

[0037] (4) In the mixing container, add the mixed liquid, rotate the agitator at a low speed (4000±200 rpm), and add the lightly burned magnesia and iron ore powder mixture within 15 seconds, and cover the agitator. And continue to stir at high speed (12000±500 rpm) for 35 seconds, and stir evenly to obtain a low-temperature magnesium oxysulfide thermosetting resin gel s...

Embodiment 3

[0039] (1) Weigh 200g of lightly burned magnesium oxide, 100g of magnesium sulfate, 6g of polyvinyl alcohol fluid loss agent FSAM-H, 30g of low temperature setting agent acetic acid, 1.5g of antifoaming agent tributyl phosphate, 60g of phenolic resin emulsion, resin Curing agent phosphoric acid 30g, floating beads 200g, fresh water 300g;

[0040] (2) Mix magnesium sulfate, resin, resin curing agent, defoamer, low temperature setting agent, fluid loss agent, and fresh water to obtain a mixed liquid, and set it aside;

[0041] (3) Mix lightly burned magnesia and floating beads evenly, and set aside;

[0042] (4) In the mixing container, add the mixed liquid, rotate the agitator at a low speed (4000 ± 200 rpm), and add the lightly burned magnesia and floating beads mixture within 15 seconds, cover the agitator, and Continue to stir for 35 seconds at high speed (6000±500 rpm), and stir evenly to obtain a low-temperature magnesium oxysulfide thermosetting resin gel system with a density ...

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Abstract

The invention relates to a low temperature magnesium oxysulfide thermosetting resin cementitious system and a preparation method thereof, and relates to the field of oil-gas well cementing. The low temperature magnesium oxysulfide thermosetting resin cementitious system has good slurry rheological property and is prone to well cementing construction. By use of a thermosetting resin cementitious material, the elasticity modulus of a consolidator can be effectively reduced, the elasticity of the consolidator is increased, and the impact resistance is improved. The density, rheology, curing time,consolidator strength and other properties of the thermosetting resin system can be further improved or controlled by cooperative use with a magnesium oxysulfide skeleton material. With use of good cementing properties of thermosetting resin, magnesium oxysulfide and metals and the expansion characteristics of magnesium oxide, the cementing strength of a first interface and a second interface canbe improved. While the basic requirements of well cementing engineering are met, the problems of vulnerability and poor cementing of oil well cement can also be solved, and the related shortcomings of oil well cement are overcome. The low temperature magnesium oxysulfide thermosetting resin cementitious system provides a new choice for the field and has broad application prospects.

Description

Technical field [0001] The invention relates to the field of cementing oil and gas wells, and furthermore, to a low-temperature magnesium oxysulfide thermosetting resin cementing system and a preparation method thereof. Background technique [0002] At present, the commonly used oil well cement is Portland cement, the main chemical components are calcium oxide, silicon dioxide and other oxides. It can be mixed with various admixtures, admixtures and water in a certain proportion to form a cement slurry, and can be adjusted according to site requirements The cement slurry density and curing time are adjusted accordingly to form cement stone with certain compressive strength, anti-permeability and durability in the well. In view of the good adaptability of Portland cement, it has been widely used in various operations such as oil and gas wells, completions, and workovers, ensuring the smooth development of oil and gas fields. [0003] However, with the increasing demand for clean en...

Claims

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Application Information

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IPC IPC(8): C09K8/473C09K8/48C09K8/487
CPCC09K8/473C09K8/48C09K8/487
Inventor 高元陈雷周仕明赵艳谭春勤初永涛杨广国汪晓静
Owner CHINA PETROLEUM & CHEM CORP
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