Air suspension agent for fracturing proppant and construction method thereof

A fracturing proppant and air suspension technology, which is applied in chemical instruments and methods, earthwork drilling, mining fluids, etc., can solve the problems of large damage to low layers, large amount of polymer, and clogged formations, etc., to achieve good sand suspension effect, Low consumption and cost-saving effect

Active Publication Date: 2020-06-23
成都一桶石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new proppant suspension method for the technical defects of the existing proppant suspension technology that the amount of polymer is large, the formation is blocked after expansion, and the lower layer is greatly damaged, which specifically includes the method for suspending the proppant. Air suspending agent and its construction method

Method used

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  • Air suspension agent for fracturing proppant and construction method thereof
  • Air suspension agent for fracturing proppant and construction method thereof
  • Air suspension agent for fracturing proppant and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Suspension aid PAAAD can be prepared by controlled living free radical polymerization, and the preparation steps are as follows:

[0044] (1) Add 100ml of methanol to the flask and place it in an ice bath, then add methyl 2-bromopropionate MBP (10g, 60mmol) until completely dissolved; then slowly add potassium ethyl xanthate PEX (10.6g, 66mmol) , after PEX is completely dissolved, stir the reaction at room temperature for 24h, then vacuum filter to filter off KBr, use a mixture of ether and hexane 200ml (volume ratio 1:1) to extract the product from the filtrate, and the extract is washed with deionized water for several After drying with sodium sulfate and rotary evaporation, a yellow liquid X1 was obtained.

[0045] (2) Dissolve yellow liquid X1 (2.0g, 9.6mmol) in 7.1g ethanol in a round bottom flask, then add acrylamide AM (6.8g, 96.0mmol) and initiator V-50 (111mg, 0.41mmol) ) and distilled water (5.5ml), blowing argon for 30 minutes to deoxygenate under stirring, ...

Embodiment 2

[0048] The proppant is 20-40 mesh quartz sand.

[0049] The preparation method of the air suspension is as follows: 65g of 3# white oil, 5g of n-heptanol, 15g of terpineol oil, 15g of N-dimethyloctadecylbutyl diquaternary ammonium salt, 1g of suspension auxiliary agent PAAAD, and the above-mentioned composition After mixing the parts, stir evenly, and add an appropriate amount of hydrochloric acid or glacial acetic acid to neutralize the pH to 7 to obtain an air suspension agent for use. Wherein, N-dimethyl octadecyl butyl bis-quaternary ammonium salt structural formula is as follows:

[0050]

[0051] The preparation method steps of air-suspension proppant for fracturing: take 1000g of proppant quartz sand and lay it flat, spray 3g of air-suspension agent evenly on the surface of the quartz sand with a small air atomizing nozzle, and set it aside.

[0052] Preparation of slick water: Prepare 1L of water in a container, stir with high-speed machinery, slowly add 0.5g of co...

Embodiment 3

[0055] The proppant is 40-70 mesh quartz sand.

[0056] The preparation method of the air suspension is as follows: 65g of D100 solvent oil, 3g of n-octanol, 17g of pine alcohol oil, 6g of N,N-dimethyloctadecylbutyl bisquaternary ammonium salt, 9g of quaternary ammonium salt, and PAAAD, a suspension aid The dosage is 0.8g, the above components are mixed and stirred evenly, and an appropriate amount of hydrochloric acid or glacial acetic acid is added to neutralize the pH to 7 to obtain an air suspension, which is ready for use. Wherein, the structural formula of quaternary ammonium salt A is as follows:

[0057]

[0058] The preparation method steps of air-suspension proppant for fracturing: take 1000g of proppant quartz sand and lay it flat, spray 3g of air-suspension agent evenly on the surface of the quartz sand with a small air atomizing nozzle, and set it aside.

[0059] Preparation of slick water: Prepare 1L of water in a container, stir with high-speed machinery, sl...

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Abstract

The invention discloses an air suspension agent for fracturing proppant, which comprises the following components in parts by weight: 100 parts of organic solvent, 1-20 parts of foaming agent, 1-20 parts of collector, and 1-2 parts of suspension auxiliary agent part; the foaming agent is an alcohol containing 4-10 carbon atoms, and the collector is a quaternary ammonium salt containing a long-chain group of 8-30 carbon atoms; the suspension aid is composed of raw material monomers acrylamide, acrylic acid , 2-acrylamide-2-methylpropanesulfonic acid and a polymer formed by polymerization of hydrophobic monomers, the molecular weight of the polymer is 2000-30000g / mol. Air atomization equipment is used to atomize the suspending agent and spray it on the surface of the proppant, and then the proppant is transported to the fractures opened by the formation through slick water. The air atomization equipment includes an air compressor and an air atomization nozzle. The air atomization nozzle includes an air inlet, a liquid inlet, and an atomized liquid outlet, and the air inlet is connected to the air compressor. The invention introduces air to suspend the proppant, and the air and suspending agent work together to suspend the proppant, reducing the amount of polymer used and the damage to the reservoir.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to an air suspending agent used for suspending a proppant and a construction method thereof. Background technique [0002] Fracturing has been proven to be the main means for efficient development of low-permeability oil and gas fields, especially shale oil and gas fields. The main purpose of fracturing is to increase the permeability of oil and gas channels to increase the production of oil and gas wells. The main method is to use high pressure to form fractures in the formation, and then use fluid to bring proppant, such as ceramsite, quartz sand, etc., to fill the fractures that have been opened to prevent the fractures from completely closing after the pressure is removed. Therefore, how to carry proppant is one of the key links in fracturing construction. [0003] The traditional method of carrying proppants is mainly through high-viscosity fluid, using ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80C08F220/60C08F220/58C08F220/56C08F220/06E21B43/267
CPCC08F220/60C09K8/80E21B43/267
Inventor 杨波
Owner 成都一桶石油科技有限公司
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