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Anti-drag aqueous fracturing fluid preparation

A water fracturing and preparation technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., to achieve the effects of avoiding Jiamin effect, outstanding drag reduction performance, and improved wetting

Inactive Publication Date: 2015-07-01
郑建立
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shale gas wells fractured in my country in the past two years have all used the drag-reducing water fracturing fluid system, but the fluid used for fracturing is still mainly the drag-reducing water produced abroad, and my country still lacks drag-reducing water fracturing fluid with excellent performance Tie

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  • Anti-drag aqueous fracturing fluid preparation

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Embodiment Construction

[0022] The drag-reducing water fracturing fluid formulation of the present invention will be described in detail below in conjunction with examples.

[0023] 1. Specific preparation method of drag reducer

[0024] Add propylene oxide, 0.5-1.0% hydroquinone, 20-25% acrylic acid and 0.5-1.0% propylene oxide, 0.5-1.0% hydroquinone, 20-25% acrylic acid and 0.5-1.0% mass volume ratio concentration to a 250ml three-necked flask equipped with a condenser tube, a stirrer, and a thermometer. % p-benzenesulfonic acid, heat up to 85~125°C, keep stirring for 6~12h, cool down, and treat the reaction product with 200ml dilute NaOH solution (0.2mol / L) for 2-3h to remove residual acrylic acid and hydroquinone, Vacuum drying at low temperature for 12-24 hours to obtain polyoxyethylene ether acrylate monomer.

[0025] According to the mass ratio, add 20~30% acrylamide, 30~40% polyoxyethylene ether acrylate monomer and 30~50% toluene into a three-necked flask with a stirrer and a thermometer, a...

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Abstract

The invention aims at providing an anti-drag aqueous fracturing fluid preparation, and provides a single-dosage anti-drag aqueous fracturing fluid preparation in order to overcome defects during preparation of anti-drag aqueous fracturing fluid and construction. The preparation can be compounded with water in any proportions, is good in solubility, meets the requirement on continuous mixing during on-site construction of shale gas, and has an important application value in shale gas exploration. The anti-drag aqueous fracturing fluid preparation comprises the following components by weight percentage: 4-6% of anti-drag agent, 8-12% of clay stabilizing agent, 1-3% of cleanup additive, and the balance of water, wherein the anti-drag agent is a bipolymer of acrylamide and polyethylene glycol oxide ether acrylate; the clay stabilizing agent is polydimethyl propylenediene ammonium chloride; and the cleanup additive comprises the following components by mass percentage: 9-11% of perfluorooctanoyl ethylene amino methyl diethyl ammonium iodide, 20-30% of polyoxyethylene 2,5-dimethyl stearyl alcohol ether, and 20-30% of isopropanol.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and in particular relates to a drag-reducing water fracturing fluid preparation. technical background [0002] With the depletion of conventional oil and gas resources, more and more attention has been paid to the exploration and development of unconventional oil and gas resources such as shale gas and coalbed methane. In 2009, the number of shale gas production wells in the United States increased to 98,590, and the production exceeded 878×10 8 m 3 , among which, the production of Barnett Shale alone reached 560×10 8 m 3 . The rapid exploration and development of shale gas has increased natural gas reserves in the United States by 40%, and the current global shale gas resources are about 456×10 12 m 3 , equivalent to the sum of coalbed methane and tight gas, and twice the amount of conventional natural gas resources. At present, shale gas exploitation in the United States...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
Inventor 郑建立其他发明人请求不公开姓名
Owner 郑建立
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