Peptidomimetic type recyclable cleaning fracturing fluid

A technology for cleaning fracturing fluid and mass ratio, applied in chemical instruments and methods, drilling composition, etc., can solve the problems of environmental threats, high interfacial tension, ineffective use of end flowback fluid, etc., to reduce fracturing Construction cost, low interfacial tension, and the effect of ensuring green production

Active Publication Date: 2018-03-13
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

[0004] The purpose of the present invention is to overcome the problem that the existing fracturing fluid has a large interfacial tension between oil and water, and the flowback fluid at the end cannot be effectively used, which poses a huge threat to the environment

Method used

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  • Peptidomimetic type recyclable cleaning fracturing fluid
  • Peptidomimetic type recyclable cleaning fracturing fluid
  • Peptidomimetic type recyclable cleaning fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A peptide-like recyclable clean fracturing fluid, consisting of the following components and their mass ratios: thickener: 1%-4%; potassium chloride: 0.5%-2%; regulator: 0.1%-1.5% ; The remainder is water.

[0015] The thickener is composed of the following components and their mass ratios: erucamide propyl dimethylamine hydroxypropyl sultaine or oleamide propyl betaine: 33% to 52%; coconut oil alkanol Amide or fatty alcohol monoacetic acid amide: 8% to 28%; co-solvent: 0.5% to 10%; the balance is water.

[0016] The co-solvent is formed by mixing methanol and ethanol, and the mass ratio of methanol and ethanol is 1:0.3-1:1.

[0017] The regulator is prepared by mixing formic acid and sodium p-toluenesulfonate, and the mass ratio of formic acid and sodium p-toluenesulfonate is 1:1-1:5.

[0018] The preparation method of the peptide-like recyclable clean fracturing fluid is as follows:

[0019] Dissolve 0.5%~10% co-solvent in water and stir evenly, then slowly add 33%...

Embodiment 2

[0022] A peptide-like recyclable clean fracturing fluid is composed of the following components and their mass ratios: thickener: 1.5%; potassium chloride: 1%; regulator: 0.7%; water: 96.8%.

[0023] The thickener consists of the following components and their mass ratios: 39% erucamide propyl dimethylamine hydroxypropyl sulfobetaine; 15% fatty alcohol monoacetamide; 4.8% cosolvent; 41.2% water .

[0024] The co-solvent is formed by mixing methanol and ethanol, and the mass ratio of methanol and ethanol is 1:0.7.

[0025] The regulator is formed by mixing formic acid and sodium p-toluenesulfonate, and the mass ratio of formic acid and sodium p-toluenesulfonate is 1:2.5.

[0026] The preparation method of the peptide-like recyclable clean fracturing fluid is as follows:

[0027] Dissolve 4.8%% co-solvent in water and stir evenly, then slowly add 39% erucamide propyl dimethylamine hydroxypropyl sulfobetaine to dissolve, stir evenly; then add 15% fatty alcohol monoacetamide, st...

Embodiment 3

[0029] A peptide-like recyclable clean fracturing fluid is composed of the following components and their mass ratios: thickener: 1%; potassium chloride: 0.5%; regulator: 0.1%; water: 98.4%.

[0030] The thickener consists of the following components and their mass ratios: 33% erucamide propyl dimethylamine hydroxypropyl sultaine; 8% fatty alcohol monoacetamide; 0.5% cosolvent; 58.5% water .

[0031] The co-solvent is formed by mixing methanol and ethanol, and the mass ratio of methanol and ethanol is 1:0.3.

[0032] The regulator is formed by mixing formic acid and sodium p-toluenesulfonate, and the mass ratio of formic acid and sodium p-toluenesulfonate is 1:1.

[0033] The preparation method of the peptide-like recyclable clean fracturing fluid is as follows:

[0034] Dissolve 0.5% co-solvent in water and stir evenly, then slowly add 33% erucamide propyl dimethylamine hydroxypropyl sulfobetaine to dissolve, stir evenly; then add 8% fatty alcohol monoacetamide, stir for 30...

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Abstract

The invention belongs to the technical field of fracturing fluids for fracturing stimulation in the process of oil field development, and in particular relates to a peptidomimetic type recyclable cleaning fracturing fluid, which is prepared from the following components by mass percent: 1% to 4% of thickening agent, 0.5% to 2% of potassium chloride, 0.1% to 1.5% of conditioning agent, and the balance of water. The problems that the existing fracturing fluid has large oil-water interfacial tension, the end back flow fluid cannot be effectively used, and a great threat is posed to the environment are solved, the peptidomimetic type recyclable cleaning fracturing fluid has the advantage of reducing the fracturing construction cost, and can be recycled and reused, and the end sewage can be used for profile modification and flooding; the peptidomimetic type recyclable cleaning fracturing fluid has the characteristics of no residue, easiness in gel breaking, good compatibility, low frictiondrag, low damage, and low interfacial tension, and achieves continuous mixing and sand fracturing construction; after the completion of fracturing construction, the back flow fluid can be reused for fracturing fluid preparation, and the end sewage can be used for profile modification and flooding, thereby ensuring green production and sustainable development of the oil field.

Description

technical field [0001] The invention belongs to the technical field of fracturing fluid for fracturing and increasing production in the oil field development process, and in particular relates to a peptide-like recyclable and clean fracturing fluid. Background technique [0002] With the promulgation and implementation of the new environmental protection law, the on-site construction fluid mostly adopts the reusable fracturing fluid system. Among them, the clean fracturing fluid has the characteristics of low friction, low residue, low damage, low cost and reusability. It is one of the key liquids in the process of oilfield reconstruction, but at the same time, a large amount of flowback liquid is produced. If the operation status of evaporation, combustion or haulage is used for centralized treatment, the on-site operation intensity and treatment cost will be increased, and it will pose a huge threat to the surrounding environment. . How to effectively utilize the terminal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/602C09K8/68
Inventor 高燕张冕李泽锋王亚军李婧王改红齐加德马新东杨敏
Owner BC P INC CHINA NAT PETROLEUM CORP
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