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Method for preparing profile adjusting and water plugging agent from slurry obtained after treatment on waste water of oil fields

A technology of profile control water shutoff agent and oilfield wastewater, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problem of high cost

Inactive Publication Date: 2010-06-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the raw materials used in the preparation of profile control and water shutoff agents are organic or inorganic chemical raw materials, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Add 55 g of a 25% sodium acrylate aqueous solution by weight to 45 g of acrylamide aqueous solution with a concentration of 30% by weight, stir evenly, add 50 g of mud after treatment with oilfield wastewater at a concentration of 50% by weight, and add nitrogen to remove oxygen. Potassium persulfate 0.005g and sodium bisulfite 0.003g, cross-linking agent aluminum citrate 0.02g, stirred and heated at 45°C under normal pressure for 8 hours to polymerize into a rubber sheet, crushed, dried, and pulverized to obtain the product. The absorption weight concentration of the product is 0.9% NaCl saline multiple of 60g / g.

Embodiment 2

[0015] Embodiment 2: add 5% sodium acrylate aqueous solution 55g in 8% acrylamide 75g aqueous solution, stir evenly, add 35% waste polymer gel 75g, fill nitrogen to remove oxygen, add initiator ammonium persulfate 0.0008g and sodium sulfite 0.0002g, exchange 0.0001 g of the joint agent N,N-methinebisacrylamide was stirred and heated at 55°C under normal pressure for 8 hours to polymerize into a rubber sheet, which was crushed, dried, and pulverized to obtain the product. Product absorption weight concentration 0.9% NaCl saline multiple: 80g / g.

Embodiment 3

[0016] Example 3: Add 55 g of 20% sodium acrylate aqueous solution to 45 g of 20% acrylamide and stir evenly, add 100 g of 20% waste polymer gel, add 0.0026 g of initiator potassium persulfate and sodium bisulfite after filling with nitrogen to remove oxygen 0.0017g, cross-linking agent aluminum citrate 0.007g, stirred and heated at 60°C under normal pressure for 8 hours to polymerize into a rubber sheet, crushed, dried, and pulverized to obtain the product. The product has an absorption weight concentration of 0.9% NaCl saline times 50g / g.

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PUM

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Abstract

The invention belongs to a method for preparing a profile adjusting and water plugging agent from slurry obtained after treatment on waste water of oil fields, comprising the following steps of: adding acrylamide and sodium acrylate monomers in waste polymer gel generated in the exploitation of oil fields for copolymerization crosslinking to synthesize a swelled oil field profile adjusting agent for adjusting the deep profile of a large-oil path oil deposit during the exploitation of the oil field. The obtained profile adjusting and water plugging agent for oil fields is applied to high-water content zones during the exploitation of oil fields and is a swelled oil field profile adjusting agent for adjusting the deep profile of the large-oil path oil deposit. The adsorption time of the product for NaCl saltwater with the weight concentration of 0.9% is 35 g / g to 60 g / g.

Description

technical field [0001] The invention relates to a method for preparing a profile control and water shutoff agent by using mud treated with oil field wastewater as a raw material. Background technique [0002] Oilfield waste gel is a waste polymer gel produced after treatment in oilfield production. The main component of the gel is slightly cross-linked or partially cross-linked polyacrylamide gel. Contains certain crude oil, metal ions and some minerals. Generally, disposal methods such as landfills not only cause great environmental pollution, but also waste resources. How to make waste harmless and comprehensively utilize resources, not only protect the environment, but also increase the reuse of waste, has attracted more and more attention. [0003] Chinese patent CN1781860 "A Synthetic Method for Preparing Body-Swelling Granular Profile Control Agent Using Oil Production Sludge" prepares a particle profile control agent from oil production sludge that was originally di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42
Inventor 王丕新张文德徐昆安会勇李文波
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI