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Self-suspension proppant and preparation method thereof

A proppant and self-suspension technology, applied in chemical instruments and methods, earth square drilling, mining fluids, etc., can solve problems such as easy consolidation of products, increased viscosity of aqueous solution, and influence on settlement time, etc., to achieve good viscosity increase Effect, good self-suspension ability, effect of good suspension ability

Inactive Publication Date: 2017-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The process conditions of the proppant in the prior art involve multiple times of heating and cooling, and most of the additives are directly added to the aggregate, and it is expected to achieve a uniform state through stirring; at the same time, in order to prevent the agglomeration of the self-suspending proppant, it is necessary to add Anti-caking agent, and in order to achieve a better effect, more additives need to be added, the procedure is complicated
In addition, the existing self-suspending proppant production method has high energy consumption, cannot be continuously produced, the product is easy to consolidate into agglomerates, and the quality is unstable; and organic substances will fall off the surface and dissolve in water, resulting in an increase in the viscosity of the aqueous solution. Its settling time is affected, the temperature rises, and the settling time is shortened
[0008] Therefore, in view of the problems existing in the current self-suspending proppant preparation technology, there is still a lot of room for improvement in this field

Method used

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  • Self-suspension proppant and preparation method thereof
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  • Self-suspension proppant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Coupling agent alcohol solution preparation: measure 900mL of absolute ethanol, 50g of isobutyltrimethoxysilane, and 10mL of hydrolysis accelerator acetic acid, stir at 400r / min for 10 minutes and set aside.

[0041] Preparation of water-soluble viscosity-increasing polymer emulsion: Weigh 250g polyethylacrylate (weight average molecular weight 3 million, Mw / Mn is 2.56) polymer material, 10g emulsifier OP-10, measure 30mL acetic acid as hydrolysis accelerator The solution was poured into 1500mL water in turn, stirred at a speed of 1000r / min for 10 minutes and then set aside.

[0042] Preparation of self-suspension proppant: take a certain amount of 50kg ceramsite proppant (particle size 40-70 mesh) and put it into the fluidized bed; turn on the fan and heating device of the fluidized bed, and the air volume of the fan can make the fluidized bed Keep the proppant fully boiling and flowing, and set the temperature of the hot air at 150°C; when the temperature in the bed i...

Embodiment 2

[0044] Embodiment 2 (contrast):

[0045] The preparation of the water-soluble viscosity-increasing polymer emulsion is the same as in Example 1.

[0046] Self-suspension proppant preparation: Weigh a certain amount of 50kg ceramsite proppant (particle size 40-70 mesh), put it into a container for standby; add the prepared viscosity-increasing polymer emulsion into the container, stir evenly, and mix the obtained mixture After natural drying, sieving, the self-suspension proppant is obtained. See Table 1 and Table 2 for the test data of self-suspension ability and temperature resistance ability.

[0047] Table 1 Suspension capacity of self-suspending proppant

[0048]

[0049] Table 2 Temperature resistance test of self-suspending proppants (100°C)

[0050]

Embodiment 3

[0052] Coupling agent alcohol solution preparation: Measure 1700mL of absolute ethanol, 100g of dodecyltrimethoxysilane, 50mL of acetic acid, stir at 400r / min for 10 minutes and set aside.

[0053] Preparation of water-soluble viscosity-increasing polymer emulsion: Weigh 300g poly ethyl 2-acrylamido-2-methyl-propanesulfonate (weight average molecular weight 6 million, Mw / Mn is 1.75) polymer material, emulsifier OP-10 20g, measure 50mL of acetic acid hydrolysis accelerator, pour into 2000mL water in turn, stir at 1000r / min for 10 minutes and set aside.

[0054] Self-suspension proppant preparation: take a certain amount of 50kg ceramsite proppant (particle size 40-70 mesh), put it into the fluidized bed; turn on the fan and heating device of the fluidized bed, the air volume of the fan can make the fluidized bed Keep the proppant fully boiling and flowing, and set the temperature of the hot air at 150°C; when the temperature in the bed is constant, spray the prepared coupling a...

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Abstract

The invention provides a self-suspension proppant which is prepared by grafting a water-based tackifying polymer material on a coupling agent modified proppant aggregate. The invention also provides a preparation method of the self-suspension proppant. The self-suspension proppant provided by the invention has a good self-suspension function, is used for hydraulic fracturing, can save liquid preparation processes and devices in conventional fracture, shortens whole construction time, also reduces the damage on reservoirs caused by flowback differences of fracturing fluids, and reduces the working costs. In addition, the preparation method of the self-suspension proppant provided by the invention can be used for continuous production of self-suspension proppant in a fixed process condition, and has the advantages of high production efficient and stable product qualities.

Description

technical field [0001] The invention relates to the field of petroleum development, in particular to a self-suspension viscosity-increasing proppant and a preparation method thereof. Background technique [0002] Hydraulic fracturing is an important measure for increasing the production of oil and gas wells and increasing the injection of water wells. Especially with the massive development of low-permeability oil and gas reservoirs, the application of hydraulic fracturing technology is becoming more and more extensive. The principle of hydraulic fracturing is to use the pumping pressure higher than the fracture pressure of the formation to form artificial fractures in the formation and communicate with natural fractures, so as to form a higher conductivity for formation fluid or well fluid, and finally greatly improve oil and gas wells. Yield or water injection capacity. [0003] In this technique, fracturing proppants play an important role in the high conductivity of art...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 张锁兵赵梦云苏长明苏建政张汝生郑承纲崔佳刘松张艳史爱萍唐萍王连生
Owner CHINA PETROLEUM & CHEM CORP
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