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Drag reducing agent for fracturing fluid and preparation method thereof, fracturing fluid suitable for shale gas fracturing

A technology of drag reducing agent and fracturing fluid, applied in the field of oil field fracturing, can solve the problems of large formation damage, high residue amount, high cost of foam fracturing fluid, construction safety, etc., to reduce pollution, reduce waste, and sand-carrying performance. excellent effect

Active Publication Date: 2017-10-31
四川安东油气工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both linear gel fracturing fluid and cross-linked fracturing fluid have problems such as high residue and great damage to the formation, and foam fracturing fluid has problems such as high cost and construction safety

Method used

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  • Drag reducing agent for fracturing fluid and preparation method thereof, fracturing fluid suitable for shale gas fracturing
  • Drag reducing agent for fracturing fluid and preparation method thereof, fracturing fluid suitable for shale gas fracturing
  • Drag reducing agent for fracturing fluid and preparation method thereof, fracturing fluid suitable for shale gas fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolving 0.7-1.3 parts by weight of acrylamide and 0.7-1.5 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid in 1 part by weight of deionized water to prepare an aqueous phase;

[0025] Add 0.1:-0.3 parts by weight of perfluoroacrylate, 0.1-0.3 parts by weight of Tween 80 and 0.1-0.3 parts by weight of OP-10 to 1 part by weight of white oil to form an oil phase;

[0026] Proportioning 1 part by weight of the above-mentioned water phase with 0.3-0.8 parts by weight of the oil phase, and fully mixing to form a stable water-in-oil inverse emulsion base liquid;

[0027] Utilize the initiator to carry out catalytic initiation, and finally synthesize the drag reducing agent with the following molecular formula:

[0028]

[0029] In the above formula, X, Y, and Z are integers, m is an integer of 3-6, and n is an integer of 2-4.

[0030] Wherein the initiator is ammonium persulfate.

[0031] The drag reducing agent of the embodiment of the present invention ha...

Embodiment 2

[0033] The fracturing fluid suitable for shale gas fracturing, the weight percentage of each component is as follows: 0.1% drag reducing agent, 0.3% drainage aid (ADB-1), 0.5% clay stabilizer (AND-1 ) and 0.05% fungicide (ADS-1). The drag reducing agent is the drag reducing agent of Example 1.

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Abstract

The invention discloses a drag reducing agent for fracturing fluid and a preparation method thereof, and a fracturing fluid suitable for shale gas fracturing, wherein the molecular formula of the drag reducing agent is: in the formula, X, Y, and Z are integers, m is an integer of 3-6, and n is an integer of 2-4. The drag reducing agent of the invention has fast swelling speed and low damage to the formation.

Description

technical field [0001] The invention relates to a drag reducing agent for fracturing fluid and a preparation method thereof, a fracturing fluid suitable for shale gas fracturing, and belongs to the technical field of oil field fracturing. Background technique [0002] Depending on the mineral content of gas-bearing shale, the fracturing fluids used in shale gas well fracturing mainly include nitrogen foam, gel and water-based fracturing fluid. Water-based fracturing fluid can save 30% of the cost without reducing production, and has achieved good results in the stimulation of many low-permeability tight gas, shale gas, and coalbed methane reservoirs. The shale with higher carbonate content usually chooses water-based fracturing fluid, and the shale with higher clay content chooses the mixed fracturing method of water-based fracturing fluid and gel. The characteristics of shale gas reservoirs are different, so the choice of fracturing fluid is also different: the fracturing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/24C08F2/30C08F2/32C09K8/68
Inventor 张鼎业徐太平李栓王鹏
Owner 四川安东油气工程技术服务有限公司
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