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Super-hydrophobic propping agent and preparation method

A proppant and super-hydrophobic technology, which is applied in earthwork drilling, production fluid, wellbore/well parts, etc., can solve the problems affecting the surface modification effect of proppant, achieve high production efficiency, stable product quality, and improve production efficiency. Yield effect

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But formation rocks will adsorb this polymer, and crude oil and water in formation will absorb and dilute this polymer, which will affect the modification effect of polymer on proppant surface

Method used

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  • Super-hydrophobic propping agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Super-hydrophobic emulsion preparation: Weigh 200.0 grams of polytetrafluoroethylene emulsion and 100.0 grams of polyvinylidene fluoride emulsion, and add 100.0 grams of polyvinyl acetate emulsion, 90.0 grams of polyvinyl alcohol, and OP-10 surfactant while stirring. 1.0 g, then add 509.0 g of distilled water, stir for 30 minutes at a speed of 600r / min, and then set aside. The superhydrophobic emulsion prepared in this way has a total of 1000 g (with a solid content of 281.6 g / 1000 g), which is about 1000 ml.

[0052] (2) Super-hydrophobic membrane processing and forming: Weigh a certain amount (see Table 2) of ceramsite proppant (particle size 0.42~0.84mm) 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 The proppant in the fluidized bed can be kept fully boiling and flowing, and the hot air temperature is set to 300℃; when the temperature difference between the air outlet temperature and the air...

Embodiment 2

[0058] (1) Super-hydrophobic emulsion preparation: Weigh 200.0 grams of polytetrafluoroethylene emulsion, 200 grams of polyperfluoroethylene propylene emulsion, and add 30.0 grams of polyvinyl acetate emulsion, 20.0 grams of acrylic emulsion, and 50.0 grams of polyvinyl alcohol while stirring. , 2.0 grams of sodium dodecylbenzene sulfonate, and then add 498.0 grams of distilled water, stir at a speed of 600r / min for 30 minutes, and then use it. The superhydrophobic emulsion prepared in this way has a total of 1000 grams (solid content of 286 grams / 1000 grams of emulsion), about 1000 ml.

[0059] (2) Super-hydrophobic membrane processing and forming: Weigh a certain amount (see Table 3) of ceramsite proppant (particle size 0.149~0.25mm) 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 The proppant in the fluidized bed can be kept fully boiling and flowing. The hot air temperature is set to 250℃; when the temp...

Embodiment 3

[0065] (1) Preparation of super-hydrophobic emulsion: weigh 200 grams of polyvinylidene fluoride emulsion and 100.0 grams of polytetrafluoroethylene emulsion, and add 200.0 grams of polyvinyl acetate emulsion, 200.0 grams of polyacrylamide glue, and dodecyl 20.0 g of sodium benzene sulfonate, then add 280.0 g of distilled water, stir for 30 minutes at a speed of 600r / min, and then set aside. The superhydrophobic emulsion prepared in this way has a total of 1000 grams (solid content of 300 grams / 1000 grams of emulsion), about 1000 ml.

[0066] (2) Super-hydrophobic membrane processing and forming: Weigh a certain amount (see Table 4) of quartz sand proppant (particle size 0.42~1.0mm), 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 The proppant in the fluidized bed can be kept fully boiling and flowing, and the hot air temperature is set to 300℃; when the temperature difference between the air outlet tempera...

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Abstract

The invention discloses a super-hydrophobic propping agent and a preparation method. The propping agent comprises 94-99.49 wt% of a propping agent bone material, 0.5-5 wt% of a super-hydrophobic film and 0.01-1.0 wt% of a lubricating agent, wherein the propping agent bone material is water washed / acid washed quartz sand or ceramsites, the particle size of the quartz sand or ceramsites ranges from 0.125 mm to 2.0 mm; the super-hydrophobic film is prepared by reacting and curing by a super-hydrophobic emulsion. The method comprises the steps of spraying the super-hydrophobic emulsion to the surface of the propping agent bone material, the emulsion reacting rapidly and being cured after heating, and forming the super-hydrophobic film on the surface of the propping agent bone material to obtain the super-hydrophobic propping agent. A contact angle of the super-hydrophobic film on the surface of the propping agent and water is greater than 150 degrees. The surface of the super-hydrophobic propping agent is an oleophylic surface, is helpful for wettability of the surface to the crude oil, and plays an effect of increasing crude oil production.

Description

Technical field [0001] The invention relates to the field of oilfield drilling, and more particularly, to a super-hydrophobic proppant and a preparation method. Background technique [0002] Fracturing technology started in the middle of the last century, and after nearly 70 years of development, it has become the main production increase technology for oil and gas field development. The fracturing technology uses high-viscosity fracturing fluid to open the reservoir rock under the high pressure of the surface pump group to create fractures that extend from the wellbore to the depths of the oil and gas reservoir, and carry proppant into the fractures to support the fractures and make the fractures It cannot be completely closed, forming a high-permeability channel in the oil and gas reservoir to facilitate the production of oil and gas. [0003] At present, the proppants used in fracturing technology are mainly quartz sand, ceramsite and their surface modification products. Since...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
Inventor 赵梦云苏建政苏长明李萍贺甲元马玉生黄志文柯文奇林鑫孟祥龙
Owner CHINA PETROLEUM & CHEM CORP
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