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A kind of low temperature integrated clean fracturing fluid and preparation method thereof

A clean fracturing fluid and low-temperature technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as increasing construction risks, increasing fracturing construction costs, and failing to meet the needs of fracturing reconstruction, achieving Wide temperature range, strong temperature resistance, good sand carrying performance

Active Publication Date: 2022-07-19
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology solves the problem of fracturing fluid viscosity affected by low water temperature, it increases the cost of fracturing construction and increases the risk of construction. Obviously, it cannot meet the needs of large-area production wells for fracturing in winter , there is no domestic research report on this aspect

Method used

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  • A kind of low temperature integrated clean fracturing fluid and preparation method thereof
  • A kind of low temperature integrated clean fracturing fluid and preparation method thereof
  • A kind of low temperature integrated clean fracturing fluid and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] 1. A low-temperature integrated clean fracturing fluid, according to the mass percentage of 100%, is composed of the following components:

[0025] Low temperature thickener: behenyl propylamine oxide 0.5%,

[0026] Elasticity enhancer: potassium chloride 1%,

[0027] Gel breaker: ammonium persulfate 0.1%,

[0028] Gel breaking initiator: sodium thiosulfate 0.1%,

[0029] The remainder is water.

[0030] 2. The preparation method of the low-temperature integrated clean fracturing fluid, comprising the following steps:

[0031] (1) Add low-temperature thickener and elasticity promoter into water, and stir for 3 minutes to obtain the original glue;

[0032] (2) In a stirring state, add a gel breaking agent and a gel breaking initiator to the raw glue solution, and stir to obtain the fracturing fluid.

Embodiment 2

[0034] 1. A low-temperature integrated clean fracturing fluid, according to the mass percentage of 100%, is composed of the following components:

[0035] Low temperature thickener: behenyl propyl amine oxide 2%,

[0036] Elasticity enhancer: potassium chloride 0.5%,

[0037] Gel breaker: ammonium persulfate 0.1%,

[0038] Gel breaking initiator: sodium thiosulfate 0.1%,

[0039] The remainder is water.

[0040] 2. The preparation method of the low-temperature integrated clean fracturing fluid, comprising the following steps:

[0041] (1) Add low-temperature thickener and elasticity promoter into water, and stir for 1 min to obtain the original glue;

[0042] (2) In a stirring state, add a gel breaking agent and a gel breaking initiator to the raw glue solution, and stir to obtain the fracturing fluid.

Embodiment 3

[0044] 1. A low-temperature integrated clean fracturing fluid, according to the mass percentage of 100%, is composed of the following components:

[0045] Low temperature thickener: a mixture of equal quality behenamidopropyl isosulbetaine and behenylpropylamine oxide: 3%;

[0046] Elasticity promoter: a mixture of equal mass of potassium chloride, sodium chloride and ammonium chloride: 2%;

[0047] Gel breaker: ammonium persulfate 0.5%;

[0048] Gel breaking initiator: sodium thiosulfate 0.2%;

[0049] The remainder is water.

[0050] 2. The preparation method of the low-temperature integrated clean fracturing fluid, comprising the following steps:

[0051] (1) Add low-temperature thickener and elasticity enhancer into water, and stir for 2 minutes to obtain the original glue;

[0052] (2) In a stirring state, add a gel breaking agent and a gel breaking initiator to the raw glue solution, and stir to obtain the fracturing fluid.

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Abstract

The invention discloses a low-temperature integrated clean fracturing fluid, which is composed of the following components according to the mass percentage of 100%: low-temperature thickener 0.5-5%, elasticity promoter 0.5-2%, gel breaker 0.1-5% 0.5%, the gel breaking initiator is 0.1-0.2%, and the balance is water; wherein, the low-temperature thickener is at least one of behenamidopropyl hydroxysultaine and behenylpropyl amine oxide. Meanwhile, the present invention also discloses the preparation method of the clean fracturing fluid. The fracturing fluid can realize low-temperature liquid preparation, and can be used for fracturing construction in a low temperature environment of ‑10 to 20 ℃ in winter; no residue, small damage, excellent performance, colorless viscoelastic colloid, good sand-carrying performance, and belongs to small Molecular viscoelastic system; strong temperature resistance, can meet the reservoir temperature in the range of 120 ℃.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and particularly relates to a low-temperature integrated clean fracturing fluid and a preparation method thereof. Background technique [0002] Fracturing is one of the main measures to increase and stabilize production in oil and gas fields. Fracturing fluid is the working fluid that creates fractures and carries sand during the fracturing process, and its performance affects the efficiency of fracturing operations. Currently, fracturing fluids are divided into water-based, oil-based, emulsified and foam fracturing fluids. Due to temperature reasons, fracturing operations are generally stopped in winter, but under special circumstances, some production wells still need fracturing stimulation. In recent years, clean fracturing fluid has been very popular in the field due to its advantages of no residue, low damage, quick gel breaking at low temperature, and convenient liquid dispe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/68C09K2208/26
Inventor 何静吴金桥范浩坤高志亮周普展转盈
Owner SHAANXI YANCHANG PETROLEUM GRP
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