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High-temperature resistant viscosity-increasing filtration-loss reducing agent and preparation method thereof used for drilling fluid

A filtrate reducer and high temperature resistance technology, which is applied in the field of oil drilling, can solve the problems of high cost and limited temperature resistance, and achieve the effects of low cost, increased temperature resistance, and accelerated reaction process

Inactive Publication Date: 2013-02-06
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials used in this invention are all ethylenic monomers, and the cost is relatively high; the molecular structure of the fluid loss control agent only has nitrile groups, amide groups and carboxyl groups, and the temperature resistance of the product is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 8 parts of acrylic fiber waste, cut them into pieces, add 3 parts of sodium hydroxide and 0.5 parts of ethylenediamine into 71.2 parts of water, raise the temperature to 94°C under stirring, and react for 3 hours; cool down to 25°C, add 13 parts of acrylamide in turn , 2 parts of acrylic acid, 1 part of 2-acrylamido-2-methylpropanesulfonic acid (AMPS), adjust the pH value to 6; raise the temperature to 45 ° C, add 0.3 parts of potassium persulfate, and react for 2 hours; take out the product, bake Dry, pulverize, and mix evenly with 1 part of aluminum chloride.

[0034] Take the anti-high temperature viscosity-increasing fluid loss reducer prepared by the method of Example 1, and investigate its performance, and the results are shown in Table 1.

[0035] Table 1

[0036] project

Embodiment 2

[0038] Take 5 parts of acrylic fiber waste, cut them into pieces, add 2 parts of potassium hydroxide and 0.6 parts of ethylenediamine into 71.7 parts of water, raise the temperature to 93°C under stirring, and react for 4 hours; cool down to 28°C, add 16 parts of acrylamide in turn , 3 parts of acrylic acid, 0.5 parts of 2-acrylamido-2-methylpropanesulfonic acid, adjust the pH value to 6; raise the temperature to 40 ° C, add 0.4 parts of ammonium persulfate, and react for 4 hours; take out the product, dry it, and crush it , and mixed with 0.8 parts of aluminum chloride, that is.

[0039] Take the anti-high temperature viscosity-increasing fluid loss reducer prepared by the method in Example 2, and investigate its performance, and the results are shown in Table 2.

[0040] Table 2

[0041] project

[0042] Apparent viscosity increase value (room temperature), mPa.s

Embodiment 3

[0044] Take 6 parts of acrylic waste silk, cut it into pieces, add it to 66.5 parts of water together with 3.5 parts of sodium hydroxide and 1 part of ethylenediamine, raise the temperature to 95 °C under stirring, and react for 2.5 hours; cool down to 26 °C, and then add 17 parts of acrylamide, 3 parts of acrylic acid, 2 parts of 2-acrylamido-2-methylpropanesulfonic acid, adjust the pH value to 6; raise the temperature to 35°C, add 0.2 parts of ammonium persulfate and 0.2 parts of potassium persulfate, and react 3h; Take out the product, dry it, crush it, and mix it with 0.6 parts of aluminum sulfate to obtain the product.

[0045] Get the anti-high temperature viscosity increasing fluid loss reducer prepared by the method of Example 3, investigate its performance, the results are as shown in table 3:

[0046] table 3

[0047] project

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PUM

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Abstract

The invention relates to a high-temperature resistant viscosity-increasing filtration-loss reducing agent and a preparation method thereof used for a drilling fluid. The viscosity-increasing filtration-loss reducing agent is prepared by adopting the method: adding waste polyacrylonitrile fibre yarns, alkali and ethylene diamine into water, and reacting for 2-9h at a temperature of 90-95 DEG C; cooling down to below 30 DEG C, adding acrylamide, acrylic acid, 2-acrylamido-2-methyl propanesulfonic acid and an initiating agent, heating up to 30-50 DEG C, and continuing reacting for 1-5h; and taking out a product, drying, crushing, and uniformly mixing with auxiliary materials to obtain the high-temperature resistant viscosity-increasing filtration-loss reducing agent. The high-temperature resistant viscosity-increasing filtration-loss reducing agent has the advantages of simple preparation technology, low cost, good viscosity-increasing performance and filtration-loss reducing function, good compatibility with the drilling fluid, no pollution to the environment, and capability of resisting high temperature above 180 DEG C.

Description

technical field [0001] The invention relates to a high-temperature anti-viscosity-increasing fluid loss reducer for drilling fluid and a preparation method thereof, belonging to the technical field of petroleum drilling. technical background [0002] During the drilling process, the drilling fluid has a certain viscosity, shear force and low fluid loss, which is the premise and basis to ensure the smooth progress of drilling. With the increasing number of deep wells and ultra-deep wells, due to the high temperature at the bottom of the well, some drilling fluid treatment agents degrade and fail under high temperature conditions. It is beneficial to keep the wellbore clean; on the other hand, it causes an increase in filtration loss, which is not conducive to maintaining the stability of the wellbore. The emergence of the above problems will affect the drilling safety, reduce the drilling speed, and ultimately affect the economic benefits of drilling. In order to solve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C08F265/08C08F220/54C08F220/06C08F220/58C08F4/30
Inventor 吕开河任冠龙邢德钢
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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