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A high-concentration water-in-oil emulsion state association polymer fracturing fluid and its preparation method

A technology for associating polymers and fracturing fluids, which is applied in the field of oilfield fracturing fluids, can solve the problems of thickener dry powder feeding, large dust, powder formation, and high labor intensity, and achieve good temperature resistance and shear resistance Effect

Active Publication Date: 2017-10-13
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention overcomes the disadvantages of high labor intensity in the preparation process, large amount of thickener dry powder feeding and dust, uneven mixing, easy formation of powder particles and local gel agglomeration, etc.

Method used

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  • A high-concentration water-in-oil emulsion state association polymer fracturing fluid and its preparation method
  • A high-concentration water-in-oil emulsion state association polymer fracturing fluid and its preparation method
  • A high-concentration water-in-oil emulsion state association polymer fracturing fluid and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-concentration water-in-oil emulsion associated polymer fracturing fluid, comprising the following components in mass percentage:

[0034] 38.7% water, 28.67% diesel, 30% fracturing fluid thickener, 2.63% emulsifier;

[0035] The fracturing fluid thickener is acrylamide-sodium acrylate-alkyl acrylate copolymer, and the emulsifier is polyoxyethylene (30) dipolyhydroxystearate (P135).

[0036] The preparation steps are as follows:

[0037] At a temperature of 40-60°C, add polyoxyethylene (30) dipolyhydroxystearate to diesel oil, mix well, add water and stir for 30 minutes to form a stable water-in-oil emulsion, and finally add fracturing fluid thickener, A uniform and stable high-concentration water-in-oil emulsion state association polymer fracturing fluid is formed by high-speed shearing (1000 rpm).

Embodiment 2

[0039] A high-concentration water-in-oil emulsion associated polymer fracturing fluid, comprising the following components in mass percentage:

[0040] 45.18% water, 25.30% diesel, 26.8% fracturing fluid thickener, 2.72% emulsifier;

[0041] The fracturing fluid thickener is acrylamide-sodium acrylate-N-alkylacrylamide copolymer, and the emulsifier is polyoxyethylene (30) dipolyhydroxystearate (P135).

[0042] The preparation steps are as follows:

[0043] At a temperature of 40-60°C, add polyoxyethylene (30) dipolyhydroxystearate to diesel oil, mix well, add water and stir for 30 minutes to form a stable water-in-oil emulsion, and finally add fracturing fluid thickener, A uniform and stable high-concentration water-in-oil emulsion state association polymer fracturing fluid is formed by high-speed shearing (1000 rpm).

Embodiment 3

[0045] The high-concentration water-in-oil emulsion associative polymer fracturing fluid described in Example 1 is different in that it includes the following components in mass percentage:

[0046] Water 43.27%, diesel 28.85%, fracturing fluid thickener 25%, emulsifier 2.88%.

[0047] The preparation steps are the same as in Example 1.

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Abstract

The invention relates to a high-concentration water-in-oil emulsion-state associating polymer fracturing fluid and a preparation method thereof. The fracturing fluid comprises the following components in mass fraction: 38.7-45.18% of water, 25.30-28.67% of diesel oil, 25-30% of a fracturing fluid thickening agent and 2.53-2.88% of an emulsifier. The high-concentration water-in-oil emulsion-state associating polymer fracturing fluid disclosed by the invention has a stable time greater than 15 days at 0 DEG C-40 DEG C and has the characteristics that the fracturing fluid is easy to prepare, dissolve and disperse and the like, and rapid mixing, construction and fracturing on the spot can be achieved.

Description

technical field [0001] The invention relates to the technical field of oil field fracturing fluid, in particular to a high-concentration water-in-oil emulsion state association polymer fracturing fluid and a preparation method thereof. Background technique [0002] Fracturing fluid is an important technical measure for increasing production of oil and gas wells and increasing injection of water wells. People use the surface high-pressure pump group to inject high-viscosity liquid into the well with a displacement that greatly exceeds the energy absorbed by the formation. With the formation of high pressure near the bottom of the well, after the pressure exceeds the ground stress near the bottom of the well and the expansion strength of the rock, the fracture extends forward and fills the proppant in the fracture, and a sufficient length can be formed in the formation after the pump is stopped. , sand-filled cracks of a certain width and height. It has high permeability, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/68C09K8/882C09K8/885
Inventor 任占春贾庆升黄波张潦源张子麟陈凯卢娜娜
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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