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Highly anti-drag slickwater and application thereof

A technology of slick water and drag reducer, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of low price, high cost requirements, and large-scale shale reservoir transformation, and achieve improvement The effect of hydrophilic and lipophilic balance, overall performance improvement, and large fracture communication ability

Inactive Publication Date: 2015-09-23
北京千永科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combined with the characteristics of low-porosity and low-permeability sandstone formations and shale formations, the buried layers are often thick and natural fractures are developed, and low-viscosity fluids without insoluble content are more likely to enter and effectively communicate with natural fractures, thus forming a complex network of fracture systems. To communicate with larger fractures and increase the drainage area, it is necessary to increase the displacement of the fluid entering the well as much as possible. When the displacement increases, the friction between the fluid, the pipe string and the formation will often increase geometrically. Therefore, the displacement It forms an opposite contradiction with friction; at the same time, due to the large-scale transformation of shale reservoirs and the large amount of liquid used, the requirements for cost are also extremely high. Even if the performance meets the requirements of on-site construction, the excessively high cost is not enough. The price of large-scale development and promotion

Method used

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  • Highly anti-drag slickwater and application thereof
  • Highly anti-drag slickwater and application thereof
  • Highly anti-drag slickwater and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment relates to a kind of slick water used in oil and gas fracturing, and its specific components are as follows:

[0026] 99.5 tons of clean water;

[0027] 0.1 tons of drag reducer, the drag reducer is a polymer of acrylic acid, acrylamide and sodium allyl sulfonate;

[0028] 0.2 tons of drainage aid, the drainage aid is made of ammonium dodecylbenzenesulfonate, non-ionic fluorocarbon surfactant and ethylene glycol according to the amount of substances 15:10:30;

[0029] The clay stabilizer is 0.2 tons, and the clay stabilizer is a homopolymer of cationic monomer DMDACC.

[0030] In the present embodiment, the preparation steps of the drag reducer are as follows:

[0031] 1) In a reaction kettle, mix white oil, water and Span-80 in a mass ratio of 6:4:0.2, stir evenly to make a water-in-oil suspension, and pass nitrogen gas into the water-in-oil suspension , the air in the water-in-oil suspension was removed, and the temperature of the suspension was rai...

Embodiment 2

[0034] This embodiment relates to a kind of slippery water, and its concrete composition is as follows:

[0035] 99.6 tons of clean water;

[0036] Drag reducer 0.05 tons. The drag reducer is a polymer formed by polymerization of acrylic acid, acrylamide and sodium allyl sulfonate.

[0037] Drainage aid 0.15 tons The drainage aid is made of sodium dodecylbenzenesulfonate, non-ionic fluorocarbon surfactant and ethanol according to the amount of substances 10:5:25;

[0038] Clay stabilizer 0.2 tons The clay stabilizer is a homopolymer of cationic monomer DMDACC.

[0039] In the embodiment of the present invention, the preparation steps of the drag reducer are as follows:

[0040] 1) In a reaction kettle, mix white oil, water and Span-80 in a mass ratio of 6:4:0.2, stir evenly to make a water-in-oil suspension, and pass nitrogen gas into the water-in-oil suspension , remove the air from the water-in-oil suspension and raise the temperature of the suspension to 55°C.

[0041] ...

Embodiment 3

[0043] This embodiment relates to a kind of slippery water, and its concrete composition is as follows:

[0044] 99.1 tons of clean water

[0045] Drag reducer 0.2 tons The drag reducer is a polymer of acrylic acid, acrylamide and sodium allyl sulfonate, provided by Beijing Qianyong Technology Co., Ltd.;

[0046] Drainage aid 0.3 tons The drainage aid is made of ammonium dodecylbenzenesulfonate, non-ionic fluorocarbon surfactant and methanol according to the amount of substances 20:12:35;

[0047] Clay Stabilizer 0.4 tons The clay stabilizer is a homopolymer of cationic monomer DMDACC.

[0048] In the embodiment of the present invention, the preparation steps of the drag reducer are as follows:

[0049] 1) In a reaction kettle, mix white oil, water and Span-80 in a mass ratio of 6:4:0.2, stir evenly to make a water-in-oil suspension, and pass nitrogen gas into the water-in-oil suspension , remove the air in the suspension and raise the temperature of the suspension to 65°C....

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Abstract

The invention relates to low-damage, low-cost and highly anti-drag and high-flowback slickwater comprising the components of 0.05-0.2 parts of a drag reducing agent, 0.15-0.3 parts of a discharge aid, 0.2-0.4 parts of a clay stabilizer, and 99.1-99.6 parts of clear water. The drag reducing agent is obtained by polymerizing acrylic acid, acrylamide, and sodium allylsulfonate. In field engineering science, large-displacement continuous dosing and fast flowback of the slickwater can be realized, and the slickwater has a good oil displacement function, such that a reservoir transformation effect is greatly improved.

Description

technical field [0001] The invention belongs to the field of low-permeability tight sandstone shale formation gas and oil well fracturing stimulation in oil and gas development, and specifically relates to a working fluid system slick water with low damage, low cost, high drag reduction and high flowback. Background technique [0002] In the process of petroleum development, fracturing technology has become a common production stimulation operation measure. The recent development hotspot - shale gas, due to the characteristics of deep burial, ultra-low porosity, low permeability, and dense continuous formation, more requirements are put forward for fracturing technology. For high-end requirements. In conventional fracturing, guar gum fracturing fluid is usually used, but guar gum fracturing fluid has very poor effect on the stimulation of low-porosity and low-permeability sandstone formations and shale formations. Combined with the characteristics of low-porosity and low-pe...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/68C09K8/602C09K8/882
Inventor 原玉红王海英牛权宇
Owner 北京千永科技股份有限公司
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