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Method for modifying surface of ceramsites for fracturing

A technology of surface modification and ceramsite, which is applied in the direction of earthwork drilling, mining fluid, wellbore/well components, etc., which can solve the problem of high cost

Active Publication Date: 2012-11-21
山东泰贝利尔环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously the hydrophobic resin used here also has the disadvantage of high cost

Method used

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  • Method for modifying surface of ceramsites for fracturing

Examples

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Effect test

Embodiment 1

[0032] The surface modification method of ceramsite for fracturing includes the following steps:

[0033] 1) Add 10 grams of magnesium chloride hexahydrate to 100 grams of water, and stir until the magnesium chloride hexahydrate dissolves to obtain a magnesium chloride solution;

[0034] 2) Add 200 grams of ceramsite for fracturing to the magnesium chloride solution prepared in step 1), and stir to make the surface of ceramsite for fracturing evenly wet;

[0035] 3) Put the evenly wetted fracturing ceramsite into the oven to dry for 2 hours, and set the oven temperature to 280°C;

[0036] 4) Put the dried ceramsite for fracturing into an alumina crucible, add 5 grams of stearic acid and 3 grams of oleic acid at the same time, place the crucible on an electric heating mantle to heat the stearic acid into a molten state, and stir for 30 minutes, the temperature of the electric heating mantle is set between 70 and 190°C;

[0037] 5) Cooling the ceramsite for fracturing coated w...

Embodiment 2

[0042] The modification method of ceramsite for fracturing includes the following steps:

[0043] 1) Add 5 grams of zinc sulfate heptahydrate to 10 grams of water, and stir until the zinc sulfate heptahydrate dissolves to obtain a zinc sulfate solution;

[0044] 2) Add 200 grams of ceramsite for fracturing to the zinc sulfate solution prepared in step 1), and stir to make the surface of ceramsite for fracturing evenly wet;

[0045] 3) Put the uniformly wet fracturing ceramsite into the oven to dry for 4 hours, and set the oven temperature to 230°C;

[0046] 4) Take 2 grams of oleic acid and 30 grams of ethanol to make a solution, soak and dry the fracturing ceramsite in this solution, put the soaked ceramsite in a vacuum drying oven, and vacuum at 40-70℃ to The ethanol is completely volatilized to produce hydrophobic and lipophilic ceramsite for fracturing. In production, we also condense and recover the volatilized ethanol,

[0047] The oil-water permeability test is the s...

Embodiment 3

[0050]The modification method of ceramsite for fracturing includes the following steps:

[0051] 1) Add 1 gram of barium hydroxide octahydrate to 50 grams of water, and stir until the barium hydroxide octahydrate is dissolved to obtain a barium hydroxide solution;

[0052] 2) Add 200 grams of ceramsite for fracturing to the barium hydroxide solution prepared in step 1), and stir to make the surface of ceramsite for fracturing evenly wet;

[0053] 3) Put the evenly wetted ceramsite for fracturing into the oven to dry for 3 hours, and set the temperature of the oven to 170°C;

[0054] 4) Mix and stir 0.6 g of ricinoleic acid and 30 g of water to form a dispersion liquid, soak the dried ceramsite for fracturing with the dispersion liquid, put the soaked ceramsite in a drying oven, and keep it warm at 90-130°C 2 hours, until the water is completely volatilized, and the water-repellent and lipophilic ceramsite for fracturing is obtained.

[0055] The oil-water permeability test i...

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Abstract

The invention discloses a method for modifying surfaces of ceramsites for fracturing and belongs to the technical field of modification of a silicate material. The method comprises the steps of: wetting the surfaces of the ceramsites by liquid containing divalent metal ions and water; generating a small amount of divalent metal compound on the surfaces of the ceramsites for fracturing after baking; and then, coating long-chain fatty acid to form a firm gydrophobic oleophilic coating layer. The long-chain fatty acid is adopted to replace the materials such as synthetic resin or sodium methyl silicone alcohol adopted by the existing technology of the similar products, so that the production cost can be obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of silicate material modification, and in particular relates to a method for modifying the surface of ceramsite for fracturing. Background technique [0002] Fracturing refers to a method of using hydraulic action to form cracks in the oil layer during the oil recovery process, also known as oil layer hydraulic fracturing. The oil layer fracturing process is to use a fracturing vehicle to squeeze a high-pressure, large-displacement liquid with a certain viscosity into the oil layer. After pressing out many cracks in the oil layer, add proppant (such as quartz sand, etc.) to fill the cracks to improve the oil layer. Permeability to increase water injection (water injection wells) or oil production (oil wells). Fracturing technology is one of the common measures to increase oil well production, but in high water cut period, fracturing is easy to lead to water flooding. At the same time, a large amount of inj...

Claims

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Application Information

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IPC IPC(8): C09K8/80C04B41/82
Inventor 丁子华李军远刘卫东杨为振赵亮
Owner 山东泰贝利尔环保科技有限公司