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A kind of thickener and its application

A thickening agent and organic solvent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of inability to directly reuse the flowback liquid, expensive treatment costs, low pH value, etc., to meet the requirements of continuous mixing. The effect of matching construction requirements, shortening the operation cycle and avoiding processing costs

Active Publication Date: 2020-09-04
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

[0002] In the current development of oil and gas fields, the reuse of flowback fluid is a key problem that needs to be solved urgently. Although the commonly used vegetable gum and polymer fracturing fluid systems have made breakthroughs in reusability compared with the previous ones, they are resistant to ore. The degree of salinity performance is still poor, especially the acid-compressed drainage, which not only has high salinity, but also has a low pH value, which makes the flowback fluid unable to be reused directly. bring great difficulty
If it is reused after chemical treatment, there are problems such as complicated treatment process, low treatment efficiency and high treatment cost.

Method used

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  • A kind of thickener and its application
  • A kind of thickener and its application
  • A kind of thickener and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a thickener, which is composed of the following substances in weight percentage: 50% surfactant, 15% organic solvent, and 35% water.

[0030] According to the difference in salt resistance of surfactants and the synergistic promotion effect between molecules, the present invention selects different types of surfactants for compounding, and they play roles under different salinity degrees, and with the increase of salt concentration, Promote the growth of rod-like and worm-like micelles, and the micelles gradually increase, making the viscosity of the system increase rapidly.

[0031] Preparation process: at normal temperature, dissolve the formulated amount of organic solvent in the formulated amount of water and stir evenly, then add the formulated amount of surfactant while stirring, and stir well to get ready.

[0032] In this example, the surfactant is a mixture of erucamidopropyl dimethylamine, cocamidopropyl betaine, erucamidopropyl hydrox...

Embodiment 2

[0035] This embodiment provides a thickener, which is composed of the following substances in weight percentage: 55% surfactant, 18% organic solvent, and 27% water.

[0036] See Example 1 for the preparation process.

[0037] In this embodiment, the surfactant is a mixture of oleamide propyl dimethyl tertiary amine, lauryl amidopropyl amine oxide and erucamide propyl hydroxysultaine, expressed in weight percent of the thickener , 40% of oleamidopropyl dimethyl tertiary amine, 5% of lauryl amidopropyl amine oxide, and 10% of erucamide propyl hydroxysulfobetaine.

[0038] The organic solvent is methanol.

Embodiment 3

[0040] This embodiment provides a thickener, which is composed of the following substances in weight percentage: 60% surfactant, 20% organic solvent, and 20% water.

[0041] See Example 1 for the preparation process.

[0042] In this embodiment, the surfactant is a mixture of fatty alcohol monoacetic acid amide, octadecyltrimethylammonium chloride, and oleic acid amidopropyl betaine. In terms of the weight percentage of the thickener, the fatty alcohol mono Acetamide is 30%, octadecyltrimethylammonium chloride addition is 15%, and oleamidopropyl betaine addition is 15%.

[0043] The organic solvent is methanol.

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Abstract

The invention provides a thickening agent and application thereof. The thickening agent is prepared from the following materials in percentage by weight, 50-65% of surfactants, 15-25% of organic solvent and the balance of water. The thickening agent has the advantages that according to salt tolerance differences among the surfactants and intermolecular synergistic promotion effects, different types of the surfactants are selected for compounding and taking effect at different mineralization degrees; growth of rod-shaped and worm-shaped micelles is promoted along with salinity increase, the micelles are enlarged gradually, and accordingly, system viscosity is improved rapidly; the thickening agent has the characteristics of hypersalinity resistance, reutilization and the like, does not needchemical treatment under hypersalinity conditions, and can be directly applied to preparation of fracturing fluids or oil-displacing agents, and accordingly, reutilization of various types of flowback fluids is realized; an on-site construction mode of preparing the fracturing fluids by clear water-preparing the fracturing fluids by the flowback fluids-preparing the oil-displacing agents by the tail-end flowback fluids is adopted, and accordingly, zero pollution and zero emission in oil field operation are realized.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry, and in particular relates to a thickener and its application, which is mainly used in oilfield fracturing stimulation reconstruction construction. Background technique [0002] In the current development of oil and gas fields, the reuse of flowback fluid is a key problem that needs to be solved urgently. Although the commonly used vegetable gum and polymer fracturing fluid systems have made breakthroughs in reusability compared with the previous ones, they are resistant to ore. The degree of salinity performance is still poor, especially the acid-compressed drainage, which not only has high salinity, but also has a low pH value, which makes the flowback fluid unable to be reused directly. bring great difficulty. If it is reused after chemical treatment, there are problems such as complicated treatment process, low treatment efficiency, and high treatment cost. [0003] Therefore, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/602C09K8/68
Inventor 邵秀丽高燕张冕兰建平王改红景志明李泽锋宇文昔涵陈亚联左挺朱丽
Owner BC P INC CHINA NAT PETROLEUM CORP
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