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A fluid loss reducer with anti-thickening and upside-down performance, its preparation method and application

A fluid loss reducing agent and performance technology, applied in the field of fluid loss reducing agent and its preparation, can solve the problems of weak cement stone in the lower layer, weakened ability of cement slurry to stabilize the formation, polluted oil and gas layers, etc., and achieve good high temperature resistance , to avoid the effect of viscosity reduction

Active Publication Date: 2021-01-19
天津科力奥尔工程材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual construction, if there is an upside-down phenomenon, the cement slurry with a lower temperature at the top will solidify earlier than the cement slurry with a higher temperature at the bottom, and the cement will lose weight. The ground separates the oil, gas and water layers, causing outward channeling, which will affect the test and evaluation of oil and gas layers, pollute oil and gas layers, reduce oil and gas recovery, and corrode the casing to reduce the strength and service life of the casing. Oil, gas, and even blowout accidents after cementing
At present, there are very few theoretical studies on solving the upside-down problem, and there are no corresponding products

Method used

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  • A fluid loss reducer with anti-thickening and upside-down performance, its preparation method and application
  • A fluid loss reducer with anti-thickening and upside-down performance, its preparation method and application
  • A fluid loss reducer with anti-thickening and upside-down performance, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 950g water to the reaction kettle, add 260g AMPS under stirring, the stirring speed is 65 rpm, after fully dissolving, add 168.1g of sodium hydroxide solution with a concentration of 30%, adjust the pH value to 8.3, then add 48g ACMO, 65g DMC and 25g NVP three components and stir to dissolve. After the temperature was raised to 60° C., 27.8 g of a pre-prepared potassium persulfate solution with a concentration of 10% was added dropwise, wherein the amount of potassium persulfate added was 0.7% of the total mass of the monomer. The reaction was stirred at constant temperature at a speed of 55 rpm for 3.5 h. After the reaction is completed, the product is discharged, and the product is a light yellow viscous solution, which is dried, pulverized, and sieved to obtain a powder product with uniform particles, which is designated as product 1.

Embodiment 2

[0036] Add 750g water in reactor, add 192g AMPS under stirring, stirring speed is 65 rev / mins, after fully dissolving, add the sodium hydroxide solution 124.8g of concentration 30%, adjust pH value to be 8.7, then add 33g NIPAM, 51g TMDAAC and 24g NVP three components and stirred to dissolve. After the temperature was raised to 60° C., 24 g of a pre-prepared potassium persulfate solution with a concentration of 10% was added dropwise, wherein the amount of potassium persulfate accounted for 0.8% of the total mass of the monomer. The reaction was stirred at constant temperature at a speed of 55 rpm for 3.5 h. After the reaction is completed, the product is discharged, and the product is a light yellow viscous solution, which is dried, pulverized, and sieved to obtain a powder product with uniform particles, which is designated as product 2.

Embodiment 3

[0038] Add 800g of water to the reaction kettle, add 216g of AMPS under stirring, the stirring speed is 65 rpm, after fully dissolving, add 140.5g of 30% sodium hydroxide solution, adjust the pH value to 8.5, then add 42g of ACMO, 66g of TMDAAC in turn and 21 g of NVP three components and stirred to dissolve. After the temperature was raised to 60° C., 29.3 g of a pre-prepared 10% sodium persulfate solution was added dropwise, wherein the amount of sodium persulfate accounted for 0.85% of the total mass of the monomer. The reaction was stirred at constant temperature at a speed of 55 rpm for 3.5 h. After the reaction is completed, the product is discharged, and the product is a light yellow viscous solution, which is dried, pulverized, and sieved to obtain a powder product with uniform particles, which is designated as product 3.

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Abstract

The invention discloses a water loss reducing agent with thickening and inverting prevention performance, a preparation method and an application of the agent. The water loss reducing agent is quadripolymer, which comprises 60-80 parts of components A, 10-15 parts of components B, 15-25 parts of components C, 5-10 parts of components D, wherein the component A is AMPS or AMPS salt, the component Bis nitrogen substituted acrylamide, the component C is quaternary ammonium salt cationic monomer, and the component D is one of N-vinyl pyrrolidone NVP and N-vinyl morpholine or a mixture thereof. The synthesized product of the agent has good thickening performance, and the thickening time of cement slurry is shortened with the increase of temperature, namely the problem of thickening and inverting is effectively prevented, the strength development rule is good, and the water loss of cement slurry is effectively controlled at the same time. The preparation method adopts water solution free radical to initiate polymerization, and is simple to operate, green, safe and environment-friendly.

Description

technical field [0001] The invention relates to a fluid loss reducer, specifically, a fluid loss reducer with anti-thickening upside-down performance, a preparation method and application thereof. Background technique [0002] The thickening time of cement slurry refers to the whole time from the beginning of mixing until the cement slurry reaches the bottom of the well along the casing, and then returns to the predetermined height. Once the thickening time is determined, the cementing time in the cementing construction can be determined. Construction time. Factors affecting the thickening time of cement slurry include construction conditions such as temperature and pressure, and various admixtures added to the cement slurry. The normal law of cement slurry thickening time is that with the increase of temperature and pressure, the hydration reaction rate of cement slurry is accelerated, and the thickening time of cement slurry is shortened; the thickening upside down phenom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F220/34C08F226/10C08F220/54C08F226/02C09K8/467C04B24/16C04B103/46
CPCC04B24/163C04B2103/465C08F220/58C09K8/467C08F220/585C08F220/34C08F226/10C08F220/54C08F226/02
Inventor 刘中华
Owner 天津科力奥尔工程材料技术有限公司
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