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Metal quaternary ammonium oxyphosphate dispersoid and application of metal quaternary ammonium oxyphosphate dispersoid in exploitation of thickened oil

A technology of metal oxyphosphoric acid and quaternary ammonium salt, applied in the direction of drilling composition, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc., can solve problems such as difficult operation, and achieve increase The production volume is beneficial to the emulsification effect of heavy oil

Inactive Publication Date: 2013-10-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method of burning the oil layer is currently the method with the most comprehensive factors for thinning the heavy oil, it has disadvantages such as difficult operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Take the NaMoO whose volume molar concentration is 0.0025mol / L 4 40mL of the solution was placed in a three-necked flask, and Na 2 HPO 4 Solution 20mL, stirred and heated to 90°C, kept at constant temperature for 1 hour, then added dropwise 25mL of concentrated hydrochloric acid with a mass percent concentration of 37%, then heated to 95°C and kept for 2 hours, then stopped the reaction and cooled the reaction solution to 60°C After filtering, the filtrate was adjusted to pH 1 with hydrochloric acid, and then 40 mL of ether was added, put into a separatory funnel, and allowed to stand for 24 hours to separate layers. Distill the ether from the upper oil layer by vacuum distillation to obtain metal oxyphosphoric acid H 3 PMo 12 o 40 ·3H 2 O; Finally, take 0.05 mmol metal oxyphosphoric acid prepared above and add it to 20 mL of octadecyltrimethylammonium chloride emulsion with a volume molar concentration of 0.0005 mol / L, and stir at 25 °C for 4 hours to obtain light...

Embodiment 2

[0013] Get 10g viscous oil and put into beaker, after being heated to fusing, add the phosphomolybdic acid quaternary ammonium salt dispersion 0.25g that example 1 obtains under stirring, then add 2.5g mass percent concentration and be 15% hydrogen peroxide solution, in viscous After reacting in the oil for 6 hours, the viscosity reduction rate of heavy oil was measured to be 90%.

Embodiment 3

[0015] Get 10g thick oil and put into beaker, after being heated to fusing, add the phosphomolybdic acid quaternary ammonium salt dispersion 0.25g that example 1 obtains under stirring, react 8 hours under the situation that feeds air, record heavy oil viscosity reduction The rate is 79%.

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Abstract

The invention relates to a metal quaternary ammonium oxyphosphate dispersoid for developing the oil deposit of thickened oil to improve the exploitation rate of crude oil and application of the metal quaternary ammonium oxyphosphate dispersoid to the exploitation of the thickened oil. By the metal quaternary ammonium oxyphosphate dispersoid, the emulsification, catalytic viscosity reduction and dissolution in exothermic reaction of the thickened oil are realized. According to the technical scheme, the metal quaternary ammonium oxyphosphate dispersoid consists of quaternary ammonium cations and metal oxyphosphate anions. A preparation method comprises the following steps of: stirring an aqueous solution of Na2MoO4 or Na2WO4 or NaVO4 and a Na2HPO4 solution, heating, dripping concentrated hydrochloric acid for reacting, and extracting by using diethyl ether to prepare metal oxyphosphate; and adding alkyl trimethyl ammonium chloride, and stirring to prepare the metal quaternary ammonium oxyphosphate dispersoid. The thickened oil is heated to be melted, and metal quaternary ammonium oxyphosphate and hydrogen peroxide are added with stirring or air is introduced or peroxy-isobutane is added to perform reaction for 3 to 8 hours, so that the viscosity reduction of the thickened oil is realized under the condition of catalytic oxidation. The metal quaternary ammonium oxyphosphate has a catalytic effect, so that the thickened oil is subjected to the exothermic catalytic oxidation reaction under the action of an oxidant to reduce the viscosity and improve the exploitation rate.

Description

technical field [0001] The invention relates to a metal oxyphosphoric acid quaternary ammonium salt dispersion used in the development of heavy oil reservoirs to increase the recovery rate of crude oil and its application in heavy oil production. technical background [0002] With the intensification of crude oil development, the proportion of difficult-to-develop heavy oil reservoirs becomes larger than that of easy-to-develop thin oil reservoirs. The development methods of heavy oil reservoirs mainly include four methods of thermal recovery, emulsification and viscosity reduction, chemical modification and dilution, and the combination of several methods may also be used in the specific implementation process. Burning the oil layer is a comprehensive embodiment of the three methods of chemical modification, heat and dilution. Although the method of burning the oil layer is currently the method with the most comprehensive factors for thinning the heavy oil, it has disadvan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/34B01J31/36C09K8/58C09K8/584
Inventor 邹长军王萌施鹏罗平亚
Owner SOUTHWEST PETROLEUM UNIV
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