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High temperature toughcementing carboxyl butadiene-styrene latex additive

A technology of carboxylated styrene-butadiene latex and admixture, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of seal failure, easy cracking, interlayer channeling, etc., and achieve prolonging service life and water loss Low, less water loss effect

Active Publication Date: 2008-12-24
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the brittleness of the conventional cement sheath, the cement sheath in the narrow annular wellbore and at the branch node is very easy to crack when it is subjected to vibration, impact, perforation and fracturing, resulting in interlayer channeling and seal failure

Method used

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  • High temperature toughcementing carboxyl butadiene-styrene latex additive
  • High temperature toughcementing carboxyl butadiene-styrene latex additive
  • High temperature toughcementing carboxyl butadiene-styrene latex additive

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In a 500ml beaker, add 1 part by weight of carboxylated styrene-butadiene latex, 0.05 part by weight of formaldehyde, acetone, naphthalene and sulfamate condensation reaction to generate sulfonate, 0.70 part by weight of hydroxyethylidene diphosphoric acid, 0.70 part by weight of acrylamide-acrylic acid - α-acrylamide-2-methylpropanesulfonic acid copolymer and 0.06 parts by weight of siloxane copolymer were stirred for 30 seconds at a stirring speed of 4000 rpm to obtain liquid A. In a 250ml beaker, add 0.3 parts by weight of nonionic surfactant 1 ethyl alcohol polyoxyethylene (10) ether, 0.3 parts by weight of nonionic surfactant 2 octylphenol polyoxyethylene (8) ether and 1.4 parts by weight of deionized water, stirred at a stirring speed of 4000rpm for 20 seconds to obtain liquid B. In another 250ml beaker, add 0.3 parts by weight of anionic surfactant 1 sodium nonylsulfonate, 0.3 parts by weight of anionic surfactant 2 sodium hexadecylbenzenesulfonate and 1.4 parts ...

Embodiment 2

[0030]In a 500ml beaker, add 1 part by weight of carboxylated styrene-butadiene latex, 0.07 parts by weight of formaldehyde, acetone, naphthalene and sulfamate condensation reaction to generate sulfonate, 0.19 parts by weight of citric acid, 0.61 part by weight of acrylamide-acrylic acid-α- Acrylamide-2-methylpropanesulfonic acid copolymer and 0.05 parts by weight of siloxane copolymer were stirred for 30 seconds at a stirring speed of 4000 rpm to prepare liquid A. In a 250ml beaker, add 0.2 parts by weight of nonionic surfactant 1 ethyl alcohol polyoxyethylene (10) ether, 0.4 parts by weight of nonionic surfactant 2 octylphenol polyoxyethylene (8) ether and 1.4 parts by weight of deionized water, stirred at a stirring speed of 4000rpm for 20 seconds to obtain liquid B. In another 250ml beaker, add 0.35 parts by weight of anionic surfactant 1 sodium nonylsulfonate, 0.35 parts by weight of anionic surfactant 2 sodium hexadecylbenzenesulfonate and 1.3 parts by weight of deionize...

Embodiment 3

[0032] In a 500ml beaker, add 1 part by weight of carboxylated styrene-butadiene latex, 0.11 parts by weight of formaldehyde, acetone, naphthalene and sulfamate condensation reaction to generate sulfonate, 0.22 parts by weight of citric acid, 0.49 parts by weight of acrylamide-acrylic acid-α- Acrylamide-2-methylpropanesulfonic acid copolymer and 0.08 parts by weight of siloxane copolymer were stirred for 30 seconds at a stirring speed of 4000 rpm to prepare liquid A. In a 250ml beaker, add 0.25 parts by weight of nonionic surfactant 1 ethyl alcohol polyoxyethylene (10) ether, 0.35 parts by weight of nonionic surfactant 2 octylphenol polyoxyethylene (8) ether and 1.4 parts by weight of deionized water, stirred at a stirring speed of 4000rpm for 20 seconds to obtain liquid B. In another 250ml beaker, add 0.3 parts by weight of anionic surfactant 1 sodium nonylsulfonate, 0.3 parts by weight of anionic surfactant 2 sodium hexadecylbenzenesulfonate and 1.4 parts by weight of deioni...

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Abstract

The invention relates to a high temperature ductility well cementing carboxylic styrene butadiene latex additive. The additive consists of 1 portion of a liquid A, 0.067 to 0.133 portion of a liquid B and 0.067 to 0.133 portion of a liquid C. The liquid A comprises 1 portion of carboxylic styrene butadiene latex, 0.03 to 0.3 portion of sulfonate, 0.0 to 0.8 portion of phosphate, carboxylate or a mixture thereof, and 0.1 to 0.8 portion of an acrylamide-acrylic acid-alpha-acrylamide-2-methylpropanesulfonic acid copolymer; the liquid B contains two nonionic surfactants and deionized water; and the liquid C contains two anionic surfactants and the deionized water. When a well bottom temperature reaches between 190 and 240 DEG C, cement slurry is also characterized in low water loss, adjustable thickening time and high compressive strength; and the hardened cement formed by the cement slurry can ensure good well cementing quality with ductility.

Description

technical field [0001] The invention relates to a cement admixture used for well completion in oilfields including high-temperature wells, branch wells and slim wells, and a high-temperature tough cementing carboxylated styrene-butadiene latex admixture. Background technique [0002] With the development of drilling technology and the continuous deepening of oilfield exploration and development, the well depth of exploration wells and production wells has been increasing, but the continuous deepening of the well depth has continuously increased the static temperature and circulation temperature of the bottom of the well, and the static temperature of some wells even reached 240 ° C. This requires the cement slurry to still have good comprehensive properties under high temperature conditions. Ordinary cement slurry loses more water at high temperature, its strength declines, and its fracture degree increases during perforation. Other properties cannot meet the needs of high t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508
Inventor 孙富全侯薇高永会霍明江王建东邹建龙
Owner BC P INC CHINA NAT PETROLEUM CORP
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