Emulsion type drag reduction thickener used for oil and gas well fracturing, and preparation method thereof

A thickening agent, emulsion type technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of long construction period, loss, large site occupation area, etc., achieve good sand carrying performance, stable performance, Environmentally friendly effect

Inactive Publication Date: 2017-07-11
北京希涛技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional liquid preparation and construction operation mode not only has the problems of long construction period and high liquid preparation intensity, but also the long-term preparation and storage will easily lead to degradation of the base liquid and decrease in viscosity. If it cannot be used in time or the construction fails, the base liquid will be damaged. The liquid will all go bad, which will cause great waste and loss, and also increase the cost and environmental pressure
At the same time, with the acceleration of domestic shale gas exploration and development, the amount of liquid used for fracturing horizontal wells is large, the number of tanks is large, and the site occupies a large area. The traditional liquid mixing method can no longer meet the needs of large-scale fracturing of shale gas wells.

Method used

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  • Emulsion type drag reduction thickener used for oil and gas well fracturing, and preparation method thereof
  • Emulsion type drag reduction thickener used for oil and gas well fracturing, and preparation method thereof
  • Emulsion type drag reduction thickener used for oil and gas well fracturing, and preparation method thereof

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preparation example Construction

[0027] The preparation method of the emulsion-type drag-reducing thickener of the present invention will be described in detail below, and the specific embodiment is only for the purpose of illustration, and is not intended to limit the protection scope of the present invention.

[0028] The manufacture method of emulsion type drag-reducing thickener of the present invention, comprises the steps:

[0029] 1) Weigh the raw materials according to weight ratio, wherein the ratio of raw materials is: acrylamide monomer 15-25wt%, functional monomer 5-15wt%, Span 80 5-25wt%, potassium persulfate 0.1-0.5wt%, cyclic Hexane 30-40wt%, deionized water 5-20wt%, OP-10 1-5wt%;

[0030] 2) At room temperature, add Span 80 dispersant and cyclohexane into a four-necked flask equipped with a thermometer, agitator, and condensing reflux device, stir and mix evenly to form solution A;

[0031] 3) Add the potassium persulfate initiator after the acrylamide monomer and the functional monomer are c...

Embodiment 1

[0040] Weigh the raw materials by weight ratio, wherein the raw material ratio is: acrylamide 15wt%, 2-acrylamide-2-methylpropanesulfonate sodium anti-salt functional monomer 15wt%, Span 80 10wt%, potassium persulfate 0.15wt %, cyclohexane 30wt%, deionized water 10wt%; at room temperature, add Span 80 dispersant and cyclohexane into a container equipped with a thermometer, a stirrer, and a condensing reflux device, stir and mix evenly to form solution A; Dissolve the acrylamide monomer and functional monomer in deionized water, add the potassium persulfate initiator after it is completely dissolved, stir until the potassium persulfate is completely dissolved, the stirring speed is 400r / min, add the dissolved mixture Step 2) in solution A; the container is placed in a constant temperature water bath at 40°C, under nitrogen protection, slowly add a 10% sodium bisulfite aqueous solution as a reducing initiator, and the amount of sodium bisulfite added is the total weight 0.5wt%; ...

Embodiment 2

[0042] Weigh the raw materials by weight ratio, wherein the raw material ratio is: acrylamide 25wt%, 2-acrylamide-2-methylpropanesulfonate sodium anti-salt functional monomer 5wt%, Span 80 25wt%, potassium persulfate 0.1wt %, cyclohexane 30wt%, deionized water 5wt%; at room temperature, add Span 80 dispersant and cyclohexane into a container equipped with a thermometer, a stirrer, and a condensing reflux device, stir and mix to form a solution A; Dissolve the acrylamide monomer and functional monomer in deionized water, add the potassium persulfate initiator after it is completely dissolved, stir until the potassium persulfate is completely dissolved, the stirring speed is 400r / min, add the dissolved mixed solution to the step 2) in the solution A; the container is placed in a 37 ℃ constant temperature water bath, under the protection of nitrogen, slowly add the sodium bisulfite aqueous solution with a concentration of 10% as the reducing initiator, the addition of sodium bisul...

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Abstract

The invention discloses a preparation method of an emulsion type drag reduction thickener used for a fracturing fluid. The method comprises the following steps: weighing raw materials comprising acrylamide, functional monomers, span80, potassium persulfate, cyclohexane, OP-10 and deionized water; stirring and mixing a dispersant and cyclohexane in a polymerization monomer; and carrying out initiation and polymerization to form the emulsion type drag reduction thickener. Compared with the prior art, the method has disclosed in the invention the advantages of simple process and environmental protection; and the emulsion type drag reduction thickener has stable performances, the highest reservoir temperature can reach 150 DEG C, the drag reduction rate is 70% or above, and the above one product solves two problems of a drag reduction stage and a sand carrying stage.

Description

technical field [0001] The invention relates to an emulsion-type drag-reducing thickener for fracturing fluid, in particular, the invention relates to an emulsion polymer drag-reducing thickener for online fracturing fluid and the emulsion drag-reducing thickener Synthetic method of the agent. Background technique [0002] With the upsurge in the exploitation of unconventional oil and gas resources, the slickwater fracturing technology used to exploit low-permeability and low-porosity unconventional reservoirs has been increasingly popularized. This technology is a fracturing operation in which a small amount of drag reducer and some additives are added to clean water as a working fluid, and a small amount of proppant is added during construction. The use of additives in slickwater fracturing fluids, especially the application and demand of drag reducers is also increasing. [0003] The function of fracturing fluid is to carry proppant into fractures under the action of su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C08F220/56C08F220/58C08F2/32C08F226/10
CPCC08F2/32C08F220/56C08F220/58C08F220/585C09K8/68
Inventor 唐菲利穆巍郝春玲孙成丽
Owner 北京希涛技术开发有限公司
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