Hydrophobic oleophilic self-cementing sand and its preparation method

A technology of filling sand and oil film, applied in the field of petrochemical industry, which can solve the problems of aggravating water plugging and reducing oil well production, and achieve the effects of inhibiting sand production, removing water plugging of oil layers, sand control effect and increasing oil production

Inactive Publication Date: 2007-12-19
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of drilling, completion, production and stimulation of oil wells, water accumulates near the wellbore of the oil layer, causing water plugging at the bottom and reducing the production of the oil well. Hydrophilic filling sand will intensify water plugging and become a sand source for sand production in oil wells, and reverse the wettability of filling sand to a hydrophobic and oil-wet surface and can self-intersect at the bottom of the well for fracturing and sand control Sand filling to achieve the purpose of fracturing, sand control and selective water suppression and oil increase, no report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Ordinary river sand with a selected particle size and compound treatment agent are made into filling sand with required particles and sufficient strength in a granulator.

[0015] 1. Select 100 parts of washed and dried river sand with a particle size of 0.2-1.0 mm (parts by weight, the same below)

[0016] 2. 10 parts of water glass

[0017] 3. 2 parts of sodium fluorosilicate

[0018] 4. 0.5 parts of sodium organosilicate

[0019] 5. 10 parts of cement binder

[0020] Stir the above materials evenly and transfer them to the granulator for granulation, control the particle size of 0.3 ~ 1.8mm to discharge, let it air on the cement floor, and turn it frequently. After 24 hours, the filled sand with particle size of 0.3 ~ 0.6mm, 0.6 ~ 0.8mm, 0.8 ~ 1.2mm, 1.2 ~ 1.8mm can be screened out, packed in woven bags lined with plastic bags, stacked for 5 days before leaving the factory use.

Embodiment 2

[0022] The quartz sand with the selected particle size and the compound treatment agent are made into the filling sand with required particles and sufficient strength in the granulator.

[0023] 1. 100 parts of washed and dried quartz sand with a particle size of 0.2-1.0 mm (parts by weight, the same below)

[0024] 2. 15 parts of water glass

[0025] 3. 2.5 parts of sodium fluorosilicate

[0026] 4. 0.8 parts of calcium stearate

[0027] 5. 10 parts of cement binder.

[0028] Stir the above materials evenly and transfer them to the granulator for granulation, control the particle size of 0.3 ~ 1.8mm to discharge, let it air on the cement floor, and turn it frequently, after 24 hours, the particle size can be sieved to be 0.4 ~ 0.6mm, 0.6~0.8mm, 0.8~1.2mm, 1.2~1.8mm and other filling sands of different specifications are packed in woven bags lined with plastic bags, and they can be stacked for 6 days before leaving the factory for use.

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Abstract

The invention relates the lipophilicity backup sand and preparing method. On the surface of ganister sand there is lipophilicity film. The film is made by composite additive, which is mixture composed by 0.5-2 parts organic silicate or aliphatic acid or aliphatic acid salt and 5-15 parts soluble glass or 5-15 parts cement binding agent or 1-5 parts curing agent or 1-5 parts organic binding agent. The invention mixes the ganister sand and composite additive in pelleting machine to get backup sand.

Description

technical field [0001] The invention relates to water-repellent and oil-wet self-interlacing filling sand and a preparation method thereof, belonging to the technical field of petrochemical industry. Background technique [0002] In the process of drilling, completion, production and stimulation of oil wells, water accumulates near the wellbore of the oil layer, causing water plugging at the bottom and reducing the production of the oil well. Hydrophilic filling sand will intensify water plugging and become a sand source for sand production in oil wells, and reverse the wettability of filling sand to a hydrophobic and oil-wet surface and can self-intersect at the bottom of the well for fracturing and sand control Sand filling to achieve the purpose of fracturing, sand control and selective water suppression and oil increase has not been reported. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a hydrophobic-ol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/12
Inventor 汤志强刘伟良
Owner SOUTHWEST PETROLEUM UNIV
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