Efficient salt-resistant dual-purpose thickening agent, preparation method and application thereof

A thickening agent and high-efficiency technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of inconvenient construction on site, and achieve the effects of less residue, improved thermal stability, and high drag reduction rate

Active Publication Date: 2021-03-19
西安长庆化工集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the different effects of the drag reducer and the thickener, the agents are often switched during the oil field construction process, which brings some inconvenience to the on-site construction

Method used

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  • Efficient salt-resistant dual-purpose thickening agent, preparation method and application thereof
  • Efficient salt-resistant dual-purpose thickening agent, preparation method and application thereof
  • Efficient salt-resistant dual-purpose thickening agent, preparation method and application thereof

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preparation example Construction

[0037] The invention first discloses a preparation method of a high-efficiency anti-salt one-dose dual-purpose thickener, which includes the following steps:

[0038] S1. Prepare the water phase: 120-160 parts by weight of acrylamide, 60-80 parts of acrylic acid, 80-120 parts of 2-acrylamido-2-methylpropanesulfonic acid, and 5-10 parts of functional monomers , 1-4 parts of hydrophobic monomer, 3-6 parts of chain extender, 2-5 parts of cosolvent, 280-340 parts of water, after mixing evenly, adjust the pH value to 6.5-6.7 with a pH regulator, mix evenly, and obtain water Mutually;

[0039] S2. Prepare oil phase: mix 200-240 parts of white oil in parts by weight, 20-35 parts of main emulsifier, 4-7 parts of co-emulsifier, and 3-6 parts of suspending agent to obtain the oil phase;

[0040] S3. Emulsification: Add water phase, oil phase and initiator in sequence in the mixing tank, control the rotation speed at 500rpm / min during the addition, stir at room temperature for 1.5-2.5h,...

Embodiment 1

[0074] The invention provides a high-efficiency anti-salt one-dose dual-purpose thickener, which comprises the following components in parts by weight: 120 parts by weight of acrylamide, 60 parts by weight of acrylic acid, 2-acrylamide-2-methylpropanesulfonate 80 parts by weight of acid, 5 parts by weight of functional monomer, 1 part by weight of N-tert-butylacrylamide, 3 parts by weight of polyethylene glycol diacrylate, 2 parts by weight of fatty alcohol polyoxyethylene ether AEO-152, 48 parts by weight of sodium hydroxide Parts by weight, 340 parts by weight of water, 200 parts by weight of white oil, 20 parts by weight of main emulsifier, 4 parts by weight of co-emulsifier, 3 parts by weight of hydrophobic silicon dioxide, 0.03 parts by weight of azobisisobutylimidazoline hydrochloride and 0.02 parts by weight of potassium persulfate and 0.02 parts by weight of sodium bisulfite.

[0075] The preparation method is: S1. Prepare the water phase; S2. Prepare the oil phase; S3...

Embodiment 2

[0078] The invention provides a high-efficiency anti-salt one-dose dual-purpose thickener, which comprises: 140 parts by weight of acrylamide, 70 parts by weight of acrylic acid, 100 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, functional 7 parts by weight of monomer, 2 parts by weight of N-lauryl acrylamide, 5 parts by weight of polyethylene glycol dimethacrylate, 13104 parts by weight of isomeric tridecyl polyoxyethylene ether, 58 parts by weight of sodium hydroxide , 310 parts by weight of water, 220 parts by weight of white oil, 27 parts by weight of main emulsifier, 5 parts by weight of co-emulsifier, 5 parts by weight of modified hectorite, 0.03 parts by weight of azobisisobutylimidazoline hydrochloride and 0.02 parts by weight of potassium persulfate and 0.02 parts by weight of sodium bisulfite.

[0079] The preparation method is: S1. Prepare the water phase; S2. Prepare the oil phase; S3. Emulsification and polymerization: fully mix the water phase, oi...

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Abstract

The invention discloses an efficient salt-resistant dual-purpose thickening agent, a preparation method and application thereof. The preparation method of the thickening agent comprises the followingsteps of: S1, preparing a water phase; S2, preparing an oil phase; S3, performing emulsifying; S4, conducting polymerization; and S5, carrying out aftertreatment. A hydrophobic monomer, a functional monomer and a salt-resistant monomer are introduced into the thickening agent to form a compact and complex spatial network structure in an aqueous solution, so that the thermal stability and the saltresistance of the thickening agent are improved, and the aqueous solution of the thickening agent can keep relatively high viscosity under a hypersalinity condition. Due to the addition of a chain extender, the molecular chain of the polymer is longer, and the viscosity is greatly improved. A cosolvent is introduced, so that the dissolving speed of a polymer emulsion is further increased, the polymer emulsion can be completely dissolved in 30 seconds, the requirement on water quality is low, and the polymer emulsion can be prepared from oilfield reinjection water and oilfield wastewater. Due to the addition of a suspending agent, the emulsion system is more stable, and the emulsion is not layered within two years. The thickening agent also has the characteristic of dual purposes, and can be used as a fracturing fluid slickwater drag reducer and a fracturing fluid thickening agent.

Description

technical field [0001] The invention belongs to the technical field of oil field enhanced oil recovery, and in particular relates to a high-efficiency salt-resistant one-dose dual-purpose thickener and its preparation method and application. Background technique [0002] The proportion of low-permeability oil and gas resources in my country is more than 50%, and low-permeability oil and gas resources have become the main exploration and development targets in China. Because low-permeability reservoirs are affected by factors such as large burial depth, high formation temperature, high salinity of formation water, and strong diagenesis and compaction, they usually must undergo stimulation measures such as fracturing, acidification, and acid fracturing to achieve effective development. . At present, fracturing stimulation technology is an important means of oil and gas field development. [0003] Due to the expansion of the shale gas fracturing market in the United States an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/56C08F220/06C08F220/58C08F220/54C08F220/34C08F226/02C09K8/68C09K8/88
CPCC08F283/065C09K8/68C09K8/882C08F220/56C08F220/06C08F220/585C08F220/54C08F220/34C08F226/02
Inventor 龙学莉胡军闵琦丁里程晓亮高峰田喜军石华强魏巍胡名家王婷婷赵静王历历李起映尤颖颖
Owner 西安长庆化工集团有限公司
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