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High-temperature-resistant oil well cement fluid loss agent and preparation method thereof

A technology of water loss reducing agent and oil well cement, which is applied in the direction of chemical instruments and methods, drilling compositions, etc. It can solve the problems of water phase volume reduction, cement slurry cannot be pumped, and penetrate into the formation, so as to improve high temperature resistance Effect

Inactive Publication Date: 2014-06-25
兰德(廊坊)石化环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this method, when the cement slurry passes through the permeable formation under pressure, it will produce a loss phenomenon, that is, the water phase in the cement will separate and enter the formation, leaving cement particles. This phenomenon is called "water loss". When encountering shale formations during the cement injection process, the water in the cement slurry will seep into the formation, resulting in a continuous decrease in the volume of the water phase. loss, or even scrapping the well

Method used

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  • High-temperature-resistant oil well cement fluid loss agent and preparation method thereof
  • High-temperature-resistant oil well cement fluid loss agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: First weigh the following raw materials according to the molar ratio of 1.0:1.0:0.5:1.0:8.0: acrylamide, acrylic acid, hydroxyethyl methacrylate, sodium styrene sulfonate and 2-acrylamide-2-methylpropanesulfonate acid.

[0024] Step 2: Calculate the amount of water according to the total solution concentration of 10%, and add it to the reaction kettle;

[0025] Step 3: adding the five monomer raw materials weighed in step 1 into the reactor to fully dissolve;

[0026] Step 4: Warm the solution in the reactor to 62°C;

[0027] Step 5: add ammonium persulfate in the amount of 0.1% of the solution in the reactor, need to control reaction in the reaction process

[0028] Response temperature to 62°C, reaction time 1.0 hour;

[0029] Step 6: Add hydroquinone with a solution concentration of 0.02% after the reaction is completed.

Embodiment 2

[0031] Step 1: First weigh the following raw materials according to the molar ratio of 1.5:1.5:1.0:1.5:10.0: acrylamide, acrylic acid, hydroxyethyl methacrylate, sodium styrene sulfonate and 2-acrylamide-2-methylpropanesulfonate acid.

[0032] Step 2: Calculate the amount of water according to the total concentration of the solution of 25%, and add it to the reaction kettle;

[0033] Step 3: adding the five monomer raw materials weighed in step 1 into the reactor to fully dissolve;

[0034] Step 4: heating the solution in the reactor to 70°C;

[0035] Step 5: add ammonium persulfate in the amount of 0.2% of the solution in the reactor, need to control reaction in the reaction process

[0036] Response temperature to 90°C, reaction time 2.0 hours;

[0037] Step 6: Add hydroquinone with a solution concentration of 0.05% after the reaction is completed.

Embodiment 3

[0039] Step 1: First weigh the following raw materials according to the molar ratio of 1.3:1.3:0.8:1.3:9.0: acrylamide, acrylic acid, hydroxyethyl methacrylate, sodium styrene sulfonate and 2-acrylamide-2-methylpropanesulfonate acid.

[0040] Step 2: Calculate the amount of water according to the total concentration of the solution of 16.5%, and add it to the reaction kettle;

[0041] Step 3: adding the five monomer raw materials weighed in step 1 into the reactor to fully dissolve;

[0042] Step 4: Warm the solution in the reactor to 66°C;

[0043] Step 5: Add ammonium persulfate in an amount of 0.15% of the solution in the reaction kettle. During the reaction, the reaction temperature needs to be controlled to 76° C., and the reaction time is 1.5 hours;

[0044] Step 6: Add hydroquinone with a solution concentration of 0.03% after the reaction is completed.

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Abstract

The invention relates to a high-temperature-resistant oil well cement fluid loss agent which is prepared by acrylamide (AM), acrylic acid (AA) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS). The invention is characterized in that the fluid loss agent is also prepared from hydroxyethyl methacrylate (PEMA) and sodium styrene sulfonate (SS).

Description

technical field [0001] The invention relates to an oil well cement additive, in particular to a high temperature resistant oil well cement fluid loss reducer used for high temperature and high pressure formation cementing in the oil well cementing process and a preparation method thereof. Background technique [0002] Oil well cement is used to seal the annulus between the well wall and the casing. When sealing, the cement slurry is generally pumped into the casing, and the cement slurry is returned from the annulus. When using this method, when the cement slurry passes through the permeable formation under pressure, it will produce a loss phenomenon, that is, the water phase in the cement will separate and enter the formation, leaving cement particles. This phenomenon is called "water loss". When encountering shale formations during the cement injection process, the water in the cement slurry will seep into the formation, resulting in a continuous decrease in the volume of...

Claims

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Application Information

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IPC IPC(8): C09K8/487C08F220/58C08F220/56C08F220/06C08F220/28C08F212/14
CPCC04B24/163C08F220/58C08F220/585C09K8/487
Inventor 戚先尧袁尚贤
Owner 兰德(廊坊)石化环保设备有限公司
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