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Multifunctional composite treating agent for polymer flooding and successive water flooding oil reservoir

A composite treatment and water flooding technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high on-site construction costs, low reuse rate and water injection recovery rate, residual polymer flocs and adjustment There are no problems such as the interaction of splitting agents, and the effects of convenient on-site construction, improved recovery rate and reduced labor intensity of workers are achieved.

Inactive Publication Date: 2009-02-11
蒋官澄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problems to be solved by the present invention are: the reutilization rate and water injection recovery rate of the residual polymer in the subsequent water flooding reservoir of the existing polymer injection flooding are low, the construction cost on site is high, and the existing treatment method has residual polymer flocculation No interaction between body and profile control agent

Method used

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  • Multifunctional composite treating agent for polymer flooding and successive water flooding oil reservoir
  • Multifunctional composite treating agent for polymer flooding and successive water flooding oil reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh an appropriate amount of phenol according to phenol: formaldehyde = 1: 1.5 (molar ratio), pour it into a three-necked flask, heat it to 45 ° C, and make it melt into a liquid; weigh the catalyst hydrogen according to the ratio of 2.5% of the total mass of phenol and formaldehyde Add sodium oxide into the three-necked flask that has melted phenol, the solution is pink, and a few particles appear; keep the temperature of the three-necked flask at 45°C, stir for 20 minutes, pour 70% of the weighed formaldehyde into the three-necked flask, the solution is brown Red, raise the temperature of the three-necked flask to 50°C, continue to stir and react for 60 minutes, and the color will gradually become darker; weigh the catalyst sodium hydroxide according to the ratio of 1% of the total mass of phenol and formaldehyde, add it to the three-necked flask, and raise the temperature of the three-necked flask to 60°C, keep stirring at a constant temperature for 20 minutes; fina...

Embodiment 2

[0023] Weigh an appropriate amount of phenol according to phenol: formaldehyde = 1: 2 (molar ratio), pour it into a three-necked flask, heat it to 48 ° C, and make it melt into a liquid; weigh the catalyst hydrogen according to the ratio of 3% of the total mass of phenol and formaldehyde pure substances Add sodium oxide into the three-necked flask that has melted phenol, the solution is pink, and a few particles appear; keep the temperature of the three-necked flask at 48°C, stir for 23 minutes, pour 75% of the weighed formaldehyde into the three-necked flask, the solution is brown Red, raise the temperature of the three-necked flask to 55°C, continue to stir the reaction for 65min, the color will gradually become darker; weigh the catalyst sodium hydroxide according to the ratio of 1% of the total mass of phenol and formaldehyde, add it to the three-necked flask, raise the temperature of the three-necked flask to 65°C, keep stirring at a constant temperature for 25 minutes; fi...

Embodiment 3

[0025] Weigh an appropriate amount of phenol according to phenol: formaldehyde = 1: 3.5 (molar ratio), pour it into a three-necked flask, heat it to 50 ° C, and make it melt into a liquid; weigh the catalyst hydrogen according to the ratio of 3.5% of the total mass of pure phenol and formaldehyde Add sodium oxide into the three-necked flask that has melted phenol, the solution is pink, and a few particles appear; keep the temperature of the three-necked flask at 50°C, stir for 25 minutes, pour 80% of the weighed formaldehyde into the three-necked flask, the solution is brown Red, raise the temperature of the three-necked flask to 60°C, continue to stir and react for 70min, and the color will gradually become darker; weigh the catalyst sodium hydroxide according to the ratio of 0.5% of the total mass of phenol and formaldehyde, add it to the three-necked flask, and raise the temperature of the three-necked flask to 70°C, keep stirring at a constant temperature for 30 minutes; fi...

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Abstract

The invention relates to a polymer flooding subsequent water-drive oil reservoir multifunctional composite disposing agent which solve the technical problems that the re-utilization ratio and water injection recovery ratio of the existing polymer are low, the site construction cost is high and the residual polymer flocculating constituent and profile modifying agent have no interaction; the polymer flooding subsequent water-drive oil reservoir multifunctional composite disposing agent is prepared by the method as follows: benzene derivative and formaldehyde, with suitable quantity, which are substituted by hydroxyl groups are poured into a three-neck flask and heated into liquid; alkali catalyst is added into the flask; the temperature of the flask is kept and the flask is mixed; subsequently, the formaldehyde is poured into the three-neck flask; the temperature of the flask raises and the flask is mixed continuously; then, the alkali catalyst is added, the temperature is increased, and the mixing is carried out subsequently; residual parts of the formaldehyde is added into the flask, the temperature raises and kept constant and the mixing is carried out subsequently; after the reaction is finished, transparent red brown liquid can be gained and solid filling material and water are added into the red brown liquid so as to be mixed as colloid dispersoid system. The polymer flooding subsequent water-drive oil reservoir multifunctional composite disposing agent can be widely applied to the exploitation of crude oil in the oilfield.

Description

technical field [0001] The invention relates to a treatment agent for oil recovery in an oil field, in particular to a multifunctional composite treatment agent for subsequent water flooding oil reservoirs after polymer injection flooding. Background technique [0002] In order to enhance oil recovery, enhanced oil recovery technology is often adopted. Polymer injection is a commonly used technology to increase production. The water-like polymer solution is pumped into the water injection well, forcing the crude oil in the surrounding reservoir to flow into the production well. According to research, with the increase of polymer injection rate, the polymer and its appendages will be adsorbed or deposited in the inner wall of the perforated layer and the gap between adjacent formations, even if the subsequent water flooding injection after polymer flooding has a pore volume multiple of 0.5, the amount of retained polymer in the oil layer can still reach 50%-60% of the total ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C09K8/575C08L61/06C08K3/34
Inventor 蒋官澄孙永壮李晓清曾流芳李师涛黄春陈应淋叶志富徐效平
Owner 蒋官澄
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