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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.

Active Publication Date: 2006-06-07
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

[0019] Example 1: Add sodium hydroxide to 30 grams of 10% acrylic acid solution for neutralization to prepare sodium acrylate solution, then add 12 grams of acrylamide, stir evenly, and then add 18 grams of oil extraction sludge (after removing the crude oil components) After the dried mud is stirred uniformly, it is filled with nitrogen to remove the dissolved oxygen, and then 0.1 g of the oxidizing agent sodium bisulfite, 0.1 g of the reducing agent potassium persulfate, and the cross-linking agent N, N-methylene bisacrylamide 0.26 g ( Based on the amount of monomer acrylamide), the temperature is raised to 25°C, and the adiabatic free radical polymerization reaction is carried out under normal pressure. After the reaction is completed, the reaction rubber block is granulated, dried, and pulverized to the desired particle size.

example 2

[0020] Example 2: In 75 grams of 10% acrylic acid solution, potassium hydroxide is added to neutralize, the neutralization reaction produces potassium acrylate solution, and then 9 grams of acrylamide is added, stirred evenly, and then 27.5 grams of oil extraction sludge (after removing the crude oil group) The dried mud after separation) stir evenly, fill with nitrogen to remove dissolved oxygen, add 0.54 g of cross-linking agent N,N-dimethyl bisacrylamide, 0.18 g of oxidant ammonium sulfite, and 0.22 g of ammonium persulfate as reducing agent. The temperature was raised to 43°C under stirring, and the adiabatic free radical polymerization method was carried out under normal pressure. The rubber lump produced by the reaction is granulated with a TJ12L granulator, dried, crushed, and sieved to become the product, and the particle size of the obtained product is less than 4mm.

example 3

[0021] Example 3: Adding sodium carbonate to 80 grams of 10% acrylic acid solution for neutralization, the neutralization reaction produces sodium acrylate solution, then 12.5 grams of acrylamide is added, and after stirring evenly, 27.5 grams of oil extraction sludge is added (after the crude oil group is removed) Dry mud after being divided), filled with nitrogen for a few minutes to remove dissolved oxygen, add 0.6 g of cross-linking agent aluminum citrate, 0.14 g of reducing agent potassium persulfate, 0.1 g of oxidant sodium thiosulfate, heating at 36°C under normal pressure Under the adiabatic free radical polymerization reaction. The polymerized rubber block is granulated, dried, and crushed to become the product.

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PUM

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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 invention relates to a preparation method of a bulk-swelling profile control agent for deep profile adjustment of large-pore reservoirs in an oil field. In particular, the preparation method uses oil extraction sludge as the raw material for preparing the profile control agent. Specifically, it is A method for preparing a bulk swelling particle profile control agent using oil extraction sludge. Background technique [0002] Oil extraction sludge is an industrial waste produced in the production process of oil fields. For the treatment of oil extraction sludge, methods such as landfilling are mainly used, and this method pollutes the environment. At present, the main inorganic fillers used in the production of particle profile control agents are bentonite and kaolin, and the use of oil extraction sludge as the inorganic filler for the production of particle profile control agents is an effective method for harmless treatment and full utilization of oil e...

Claims

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Application Information

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Patent Type & Authority Applications(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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