Composition of neutral descaling and plugging removal agent for oilfield mechanical production wells and preparation method

A technology for removing plugging agent and composition is applied in the preparation of neutral scale removing and plugging removing agent composition for oilfield mechanical production wells, and the field of neutral scale removing and plugging removing agent composition for oilfield mechanical production wells, which can solve the problem of shortening the pump inspection period, downhole Strong corrosiveness of tools, frequent inspection of pumps due to scale, etc., to eliminate corrosion problems, ensure safe production, and avoid flammable effects

Active Publication Date: 2017-06-16
GANSU HEIMA PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consequences are: scale deposits block the oil layer; after scale deposits, in the production well tubing and gathering pipelines, it is easy to cause pipeline blockage and oil production pumps to fail to work normally
[0004] In the field test of ASP flooding, it was found that the most prominent problem was the serious scaling of the production well, which led to the deterioration of the operating environment of the wellbore, and the phenomenon of rod lag, rod breakage, and pump jam often occurred, resulting in an increase in the pump inspection rate of the mechanical production well. , the pump inspection cycle is shortened, and the shortest pump inspection cycle is less than one month, which seriously affects the normal production of mechanical recovery wells
At present, anti-scaling measures for production wells include adding anti-scaling agents and anti-scaling pumps at the wellhead, but the effect is not ideal. Pumps are stuck and rods are broken frequently due to scale checks; the three-component compound scale removal is mainly based on acidic agents. Although it can effectively dissolve scale, it is highly corrosive to rods, pipes, pumps and downhole tools, and cannot descale the screw pump well. After descaling, the waste liquid needs to be returned to the ground for treatment, which is serious Constrained the popularization of ASP flooding technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1, raw materials were weighed according to the following components and weights: polyepoxysuccinate 16kg, sodium hydroxyethylene diphosphate 8kg, ethylenedienetriamine pentaacetate amine 24kg, glycolic acid amine 25kg, active attapulgite 16kg of soil, 21kg of ammonium persulfate, 11kg of sodium dihexyl sulfosuccinate, 7kg of butyl lactate, 0.3kg of vanadium pentoxide, 6kg of linear sodium dodecylbenzenesulfonate, 12kg of sodium nitrilotriacetate, Hexamethamine 6kg and glycerin fatty acid ester 0.2kg; According to the following steps, the above-mentioned raw materials are prepared into a neutral descaling and plugging removal agent for oil field mechanical production wells:

[0050] 1. The above-mentioned polyepoxysuccinate, sodium hydroxyethylene diphosphate, ethylenedienetriamine pentaacetate, glycolic acid amine and 8kg of active attapulgite are crushed with a grinder and passed through a 20-mesh sieve , and then stirred for 40 minutes until uniform to obtain ...

Embodiment 2

[0055] Example 2, raw materials were weighed according to the following components and weight: polyepoxysuccinamide 18kg, sodium hydroxyethylene diphosphate 12kg, ethylenedienetriamine pentaacetate amine 21kg, glycolic acid amine 23kg, active attapulgite 15kg of soil, 25kg of ammonium persulfate, 9kg of sodium dihexyl sulfosuccinate, 9kg of butyl lactate, 0.25kg of vanadium pentoxide, 7kg of linear sodium dodecylbenzenesulfonate, 10kg of sodium nitrilotriacetate, Hexatropine 5kg and glycerin fatty acid ester 0.15kg; According to the following steps, the above-mentioned raw materials are prepared into a neutral descaling and plugging-removing agent for oil field mechanical production wells:

[0056] 1. The above-mentioned polyepoxysuccinic acid amine, sodium hydroxyethylene diphosphate, ethylenediene triamine pentaacetic acid amine, glycolic acid amine and 7kg of active attapulgite are crushed with a grinder, and the remainder is the same as in the examples 1;

[0057] 2, with...

Embodiment 3

[0061] Example 3, raw materials were weighed according to the following components and weights: 20kg of polyepoxysuccinate, 10kg of sodium hydroxyethylene diphosphate, 22kg of ethylenedienetriamine pentaacetate, 20kg of glycolic acid amine, active attapulgite 16kg of soil, 22kg of ammonium persulfate, 12kg of sodium dihexyl sulfosuccinate, 8kg of butyl lactate, 0.2kg of vanadium pentoxide, 5kg of linear sodium dodecylbenzenesulfonate, 14kg of sodium nitrilotriacetate, 4 kg of urotropine and 0.1 kg of glycerin fatty acid ester; the steps of preparing the above raw materials into a neutral descaling and plugging removal agent for oilfield mechanical production wells are the same as in Example 1.

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Abstract

The invention relates to a neutral blockage removing agent composition used for a mechanical recovery well in an oilfield. The neutral blockage removing agent composition is prepared from the following components in parts by weight: 16-20 parts of polyepoxysuccinic acid amine, 7-12 parts of hydroxyethylidene dipllosphate sodium, 21-25 parts of divinyl pentaacetic acid amine, 20-25 parts of hydroxyl ammonium acetate, 12-16 parts of activated attapulgite, 21-25 parts of ammonium persulfate, 9-12 parts ofdicyclohexyl sulfobutanedioate sodium, 7-9 parts of butyl lactate, 0.2-0.3 part of vanadium pentoxide, 5-8 parts of straight chain sodium dodecylbenzenesulfonate, 10-14 parts of nitrilotriacetic acid sodium salt, 4-7 parts of urotropin and 0.1-0.3 part of glycerin fatty acid ester. The neutral blockage removing agent composition is suitable for scale removal and blockage removal of an oil pumping unit well and a screw pump well, can effectively control the reaction speed of the blockage removing agent and the scale of the oil pumping unit well and the scaled screw pump well, and prevent the falling-off of big scale residues to result in the secondary blockage of the mechanical recovery well and an oil recovery pump thereof, has high blockage removal speed, is neutral and is free of corrosion; the waste liquid for blockage removal does not need to be discharged onto the ground to be subjected to sewage treatment, the blockage removal time does not exceed 24 hours, and the effect of safe and corrosion-free blockage removal is achieved.

Description

technical field [0001] The patent of the present invention relates to an auxiliary agent used in oil recovery in oil fields, in particular to a neutral descaling and plugging removal agent composition for mechanical production wells in oil fields, and also relates to a preparation method for the neutral descaling and blocking removal agent composition for mechanical production wells in oil fields. Background technique [0002] The oil recovery of the oil field has entered the stage of high water cut development, and ASP flooding is one of the important technologies to ensure continuous and stable production. Oil recovery by ASP flooding is to add a certain amount of petroleum sulfonate surfactant, caustic soda and polyacrylamide polymer with large molecular weight to the injected water to greatly reduce the oil-water interfacial tension and increase the viscosity of injected water, thereby reducing the oil-water interfacial tension. The oil-water mobility ratio expands the m...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C09K8/524C09K8/528
CPCC09K8/524C09K8/528
Inventor赵丽萍刘音希刘志新
OwnerGANSU HEIMA PETROCHEM ENG