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A kind of drilling fluid flow pattern regulator and its preparation method

A technology of flow regulator and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as viscosity, shear force drop, poor performance of drilling fluid, and reduced carrying capacity, so as to reduce the risk of triggering Effects of temperature, increased stability, and strong suppression ability

Active Publication Date: 2019-02-05
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as the salt content increases, the electrolyte concentration increases, the acidity of the hydration group of the polymer is weaker, and the dehydration effect is stronger, which makes the treatment agent invalid; at the same time, the double electric layer of the clay particles in the drilling fluid is compressed , the hydration film becomes thinner, and flocculation forms between clay particles, resulting in a decrease in the solid content of the system, a decrease in viscosity and shear force, and a deterioration in the performance of the drilling fluid, thereby reducing the carrying capacity and seriously affecting the drilling speed

Method used

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  • A kind of drilling fluid flow pattern regulator and its preparation method
  • A kind of drilling fluid flow pattern regulator and its preparation method
  • A kind of drilling fluid flow pattern regulator and its preparation method

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Effect test

Embodiment 1

[0029] The invention provides a drilling fluid flow pattern regulator A and a preparation method thereof, comprising the steps of:

[0030] 1) the potassium hydroxide of 3.8g is dissolved with the deionized water of 10g to obtain potassium hydroxide solution;

[0031] 2) Put 3.8g of acrylic acid and 2.2g of 2-acrylamido-2-methylpropanesulfonic acid mixture into the reactor, add potassium hydroxide solution dropwise to the reaction, and adjust the pH to 6.5 with ammonia water after the dropwise addition ;

[0032] 3) Add 15g of acrylamide, 1g of acryloyloxyethyltrimethylammonium chloride, 0.3g of urea, 3ppm transition metal catalyst, and 34g of deionized water into the reactor, and mix them uniformly The solution is poured into a metal polymerization tank with an isolation membrane;

[0033] 4) add the initiator of 160ppm, the blowing agent of 0.53g in the polymerization tank, obtain the copolymerization rubber block after airtight reaction 2h under the protection of nitrogen...

Embodiment 2

[0036] The invention provides a drilling fluid flow pattern regulator B and a preparation method thereof, comprising the steps of:

[0037] 1) the potassium hydroxide of 3.5g is dissolved with the deionized water of 10g to obtain potassium hydroxide solution;

[0038] 2) Put 2.27g of acrylic acid and 6.53g of 2-acrylamido-2-methylpropanesulfonic acid mixture into the reactor, add potassium hydroxide solution dropwise to the reaction, and adjust the pH to 6.3 with ammonia water after the dropwise addition ;

[0039] 3) Add 15g of acrylamide, 1g of acryloyloxyethyltrimethylammonium chloride, 0.3g of urea, 3ppm transition metal catalyst, and 34g of deionized water into the reactor, and mix them uniformly The solution is poured into a metal polymerization tank with an isolation membrane;

[0040] 4) add the initiator of 160ppm, the blowing agent of 0.53g in the polymerization tank, obtain the copolymerization rubber block after airtight reaction 3h under the protection of nitrog...

Embodiment 3

[0043] The invention provides a drilling fluid flow pattern regulator C and a preparation method thereof, comprising the steps of:

[0044] 1) the potassium hydroxide of 3.5g is dissolved with the deionized water of 10g to obtain potassium hydroxide solution;

[0045] 2) Put 3.8g of acrylic acid and 2.2g of 2-acrylamido-2-methylpropanesulfonic acid mixture into the reactor, add potassium hydroxide solution dropwise to the reaction, and adjust the pH to 6 with ammonia water after the dropwise addition ~7;

[0046] 3) Add 15g of acrylamide, 1.2g of acryloyloxyethyltrimethylammonium chloride, 0.3g of urea, 3ppm transition metal catalyst, and 34g of deionized water into the reactor, and mix the reactor Pour the solution in the metal polymerization tank with an isolation membrane;

[0047] 4) add the initiator of 160ppm, the blowing agent of 0.53g in the polymerization tank, obtain the copolymerization rubber block after airtight reaction 3h under the protection of nitrogen;

[...

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Abstract

The invention provides a drilling fluid flow pattern regulating agent and a preparation method thereof. The drilling fluid flow pattern regulating agent is formed by copolymerization of acrylamide, acrylate and organic functional monomers under the action of initiators and catalysts. The organic functional monomers are mixtures of 2-acrylamide-2-methylpropane sulfonic acid and acryloyloxyethyl trimethyl ammonium chloride. The catalysts are transition metal catalysts. The mass ratio of the acrylamide to the acrylate to the organic functional monomers is (13-15):(2-4):(3-9). The drilling fluid flow pattern regulating agent and the preparation method thereof have the advantages that the drilling fluid flow pattern regulating agent has high resistance to salt, grease and other contamination, high inhibition capability, good anti-sloughing effect, low content of inferior solid phases and high lubricity, can meet naturally-built inclined shafts and directional wells both with hole drift angles smaller than 20 degrees, has high temperature resistance, and can enable temperature resistance of saline drilling fluid systems to reach above 150 DEG C.

Description

technical field [0001] The invention relates to the technical field of chemical product manufacturing, in particular to a drilling fluid flow pattern regulator and a preparation method thereof. Background technique [0002] The Jianghan Basin is a typical inland fault-depressed salt lake basin with stratigraphic characteristics: special sedimentary environment, stratum salt-gypsum development, and the cumulative thickness of pure salt layers in some blocks reaches more than 1,800 meters; rich brine; high geothermal gradient; high montmorillonite content; The gypsum mudstone is well developed with strong water sensitivity; the formation has strong hydration dispersion and high collapse pressure. With the development of inter-salt non-sandstone, low permeability, lithologic traps and other special reservoirs, the number of highly deviated wells and directional wells has increased. [0003] According to the special ground and geological conditions of Jianghan Basin, saturated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F220/34C08F2/44C08F4/00C08J9/04C09K8/035C09K8/24
CPCC08F2/44C08F4/00C08F220/56C08J9/04C08J2333/26C09K8/035C09K8/24C09K2208/12C09K2208/34C08F220/06C08F220/585C08F220/34
Inventor 周超群杨淑君刘浩冰
Owner CHINA PETROCHEMICAL CORP
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