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Method for preparing volume expansion type granular profile control agent using oil production mud

A technology for oil extraction sludge and profile control agent, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as poor compatibility of bentonite, and achieve the effect of avoiding pollution and using safety.

Inactive Publication Date: 2007-05-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with oil production sludge, bentonite is less compatible with the formation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Example 1: in 30 grams of 10% acrylic acid solution, add sodium hydroxide and carry out neutralization, make sodium acrylate solution, then add 12 grams of acrylamide, stir, then add 18 grams of oil production sludge (after removing the crude oil component Dry mud) after stirring evenly, add 0.1 gram of oxidant sodium bisulfite after being filled with nitrogen to remove dissolved oxygen, 0.1 gram of reducing agent potassium persulfate, 0.26 gram of cross-linking agent N, N-methylenebisacrylamide ( Based on the amount of monomer acrylamide), the temperature is raised to 25°C, and adiabatic free radical polymerization is carried out under normal pressure. After the reaction is completed, the reaction rubber block is granulated, dried, and crushed to the required particle size.

example 2

[0021] Example 2: In 75 grams of 10% acrylic acid solution, add potassium hydroxide to neutralize, neutralization reaction generates potassium acrylate solution, then add 9 grams of acrylamide, stir, then add 27.5 grams of oil production sludge (through removal of crude oil group Dry mud after drying) and stir evenly, fill with nitrogen to remove dissolved oxygen, add 0.54 grams of crosslinking agent N, N-dimethylbisacrylamide, 0.18 grams of oxidant ammonium sulfite, 0.22 grams of reducing agent ammonium persulfate, Stir and heat up to 43°C, and perform adiabatic free radical polymerization under normal pressure. The rubber block produced by the reaction is granulated by a TJ12L granulator, dried, crushed and sieved to obtain the product, and the particle size of the obtained product is less than 4mm.

example 3

[0022] Example 3: in 80 grams of 10% acrylic acid solution, add sodium carbonate and carry out neutralization, neutralization reaction generates sodium acrylate solution, then add 12.5 grams of acrylamide, after stirring, then add 27.5 grams of oil production sludge (through removing crude oil group After separation and drying of dry mud), fill nitrogen for several minutes to remove dissolved oxygen, add 0.6 grams of crosslinking agent aluminum citrate, 0.14 grams of reducing agent potassium persulfate, 0.1 grams of oxidant sodium thiosulfate, and heat up at 36 °C under normal pressure adiabatic free radical polymerization reaction. The polymerized rubber block is granulated, dried and crushed to become the product.

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Abstract

The present invention discloses process of synthesizing expanded granular profile control agent with oil production mud, and the synthesized profile control agent is used in the deep profile control of macroporous oil reservoir. The expanded granular profile control agent is prepared with ternary polymer system of acrylic acid, acrylamide and cross-linking agent and through adding oil production mud, oxidant and reductant in certain weight proportion to produce adiabatic free radical polymerization forming colloid block and subsequent palletizing, stoving and crushing to required granularity. The said process changes the oil production mud into useful resource and the prepared expanded granular profile control agent has the features of heat resistance, salt tolerance, high expanding performance, long stable period, etc.

Description

technical field [0001] The present invention relates to a preparation method of a body-swelling profile control agent used for adjusting the deep profile of a large pore reservoir in an oil field. In particular, oil production sludge is used as a raw material for preparing the profile control agent in the preparation method. Specifically, it is The invention discloses a method for preparing a body-expanding granular profile control agent from oil production sludge. Background technique [0002] Oil production sludge is an industrial waste produced in the process of oil field production. For the treatment of oil production sludge, landfill and other methods are mainly used, and this method pollutes the environment. At present, the inorganic fillers used in the production of granular profile control agents mainly include bentonite and kaolin, and the use of oil production sludge as the inorganic filler for the production of granular profile control agents is an effective metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C09K8/02
Inventor 赵振兴李芮丽王临红
Owner PETROCHINA CO LTD
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