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High-temperature-resistant clean fracturing fluid thickener capable of realizing repeated crosslinking

A technology for cleaning fracturing fluids and thickeners, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of high cost, poor temperature resistance, incomplete gel breaking, etc., and achieve high temperature resistance , The effect of increasing construction speed and efficiency

Inactive Publication Date: 2019-10-25
孙国平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a high-temperature-resistant and repeatable cross-linking clean fracturing fluid thickener, which solves the common problem of poor temperature resistance of clean fracturing fluids in the prior art, generally not exceeding 90°C, complicated composition and high cost. The problem of incomplete gel breaking and repeated cross-linking

Method used

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  • High-temperature-resistant clean fracturing fluid thickener capable of realizing repeated crosslinking
  • High-temperature-resistant clean fracturing fluid thickener capable of realizing repeated crosslinking
  • High-temperature-resistant clean fracturing fluid thickener capable of realizing repeated crosslinking

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Embodiment 1

[0024] Such as figure 1 As shown, the present invention provides a kind of high temperature resistant and reusable cross-linking cleaning fracturing fluid thickener, the thickener is made of 50% water, 30% sodium lauryl sulfate, 5% Si Disc 80, 5% Tween 80, 5% organic alcohol, 5% CAB-35.

[0025] The organic alcohol is one of methanol, ethanol, propanol, isopropanol, ethylene glycol and cycloethanol.

[0026] A method for preparing a high-temperature-resistant and repeatable cross-linking cleaning fracturing fluid thickener, the preparation steps are as follows:

[0027] Step 1: Add 30% sodium lauryl sulfate, 5% Span 80, 5% Tween 80, 5% organic alcohol and 5% CAB-35 into the mixing tank for stirring and mixing 45-60 minutes to make a mixture;

[0028] Step 2: Send the homogeneously mixed material into the emulsification tank by pipeline and feeding pump, add an appropriate amount of water, stir and mix for 1.5-2 hours, and make a mixed solution;

[0029] Step 3: Send the mi...

Embodiment 2

[0035] The weight ratio of the thickener raw material is changed to 40% water, 35% sodium lauryl sulfate, 10% Span 80, 5% Tween 80, 5% organic alcohol, 5% CAB-35, and prepare a thickener according to the preparation method of a high-temperature-resistant and repeatable cross-linking cleaning fracturing fluid thickener provided by the present invention.

Embodiment 3

[0037] The weight ratio of the thickener raw material is changed to 45% water, 30% sodium lauryl sulfate, 10% Span 80, 8% Tween 80, 5% organic alcohol, 2% CAB-35, and prepare a thickener according to the preparation method of a high-temperature-resistant and repeatable cross-linking cleaning fracturing fluid thickener provided by the present invention.

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Abstract

The invention discloses a high-temperature-resistant clean fracturing fluid thickener capable of realizing repeated crosslinking. The thickener is prepared from the raw materials in percentage by weight: 50% of water, 30% of lauryl sodium sulfate, 5% of Span 80, 5% of Tween 80, 5% of organic alcohol, and 5% of CAB-35. The thickener has the characteristics of repeatability and recycling, a fracturing fluid does not need to be specially treated, the temperature resistance is higher, the thickener can resist 170 DEG C at most, and the purposes of increasing production and improving effects, controlling safety, saving water and energy, protecting the environment and reducing emission, lowering the cost and improving effects, and increasing the speed and improving effects of construction through fracturing measures can be achieved; during actual use, through technology control of the construction process, fracturing modification requirements of low-permeability oil-gas fields can be met, closed construction and more efficient recycling of all residual fluids in the whole fracturing process can be achieved, and finally the purpose of no residual fluid on site is achieved.

Description

technical field [0001] The invention relates to a thickener, in particular to a high-temperature-resistant and repeatable cross-linking clean fracturing fluid thickener, which belongs to the technical field of thickeners. Background technique [0002] Fracturing fluid is one of the key links in the fracturing construction of oil and gas well completion technology, known as the "blood" of fracturing. Its performance not only directly affects the success rate of hydraulic fracturing, but also has a great impact on the stimulation effect of oil and gas layers after fracturing. The fracturing fluid should have good thermal stability and rheological properties during construction, low frictional pressure drop, excellent proppant transport and suspension capacity, and after the construction is completed, it should be able to quickly and completely break the gel and flow back. The residue is low, and the filtrate entering the formation has good compatibility with oil and gas, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/604C09K8/68C09K8/885
Inventor 白伟孙国平王强郭永新高帅帅
Owner 孙国平
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