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Neutral plugging remover composition and preparation method for oil recovery formation

A technology for removing plugging agent and composition is applied in the preparation of neutral plugging removing agent composition in oilfield oil production formation, and the field of neutral plugging removing agent composition in oilfield oil production formation, which can solve the problem of failure, oil production well and oil pumping equipment. Corrosion etc.

Active Publication Date: 2017-03-15
GANSU HEIMA PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Second, the traditional means of unblocking
During the acidizing process, the acidizing corrosion inhibitor is susceptible to failure due to the influence of formation temperature, pressure and iron ions. Once the acidizing corrosion inhibitor fails, it will cause serious corrosion of oil production wells, oil pumps and oil transportation equipment. potentially huge risk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1, raw materials were weighed: sodium polyepoxysuccinate 35kg, sodium gluconate 20kg, polyethylene glycol 2kg, triethanolamine 2kg, ethyl lactate 9kg, fatty alcohol polyoxyethylene ether sodium sulfate 9kg, amino acid sodium 11kg, Active attapulgite 14kg, vanadium pentoxide 0.2kg, lipase 5kg, sorbitan fatty acid ester 6kg, sodium p-hydroxybenzenesulfonate 15kg, tert-butyl hydroperoxide 4kg and diethylene glycol laurate 0.2kg . According to the following steps, the above-mentioned raw materials are prepared into a neutral plug-removing agent composition for an oil recovery formation in an oil field:

[0061] 1. Crush 35kg of sodium polyepoxysuccinate, 20kg of sodium gluconate, 2kg of polyethylene glycol, 2kg of triethanolamine, 9kg of ethyl lactate and 5kg of active attapulgite with a grinder, pass through a 20-mesh sieve and use a mixer Stir for 40 minutes until uniform to obtain the first powder.

[0062] 2. Stir 9kg of fatty alcohol polyoxyethylene ether sod...

Embodiment 2

[0066] Example 2, raw materials were weighed: sodium polyepoxysuccinate 33kg, sodium gluconate 18kg, polyethylene glycol 3kg, triethanolamine 3kg, ethyl lactate 10kg, fatty alcohol polyoxyethylene ether sodium sulfate 7kg, amino acid sodium 8.5kg , active attapulgite 10kg, vanadium pentoxide 0.15kg, lipase 6kg, sorbitan fatty acid ester 8kg, sodium p-hydroxybenzenesulfonate 16kg, tert-butyl hydroperoxide 6kg and diethylene glycol laurate 0.16 kg. According to the following steps, the above-mentioned raw materials are prepared into a neutral plug-removing agent composition for an oil recovery formation in an oil field:

[0067] 1, 33kg of sodium polyepoxysuccinate, 18kg of sodium gluconate, 3kg of polyethylene glycol, 3kg of triethanolamine, 10kg of ethyl lactate and 4kg of active attapulgite are crushed with a grinder; all the other are the same as in Example 1.

[0068] 2, 7kg of fatty alcohol polyoxyethylene ether sodium sulfate, 8.5kg of sodium amino acid and 5kg of active...

Embodiment 3

[0072] Example 3, raw materials were weighed: sodium polyepoxysuccinate 30kg, sodium gluconate 23kg, polyethylene glycol 2.5kg, triethanolamine 2.5kg, ethyl lactate 12kg, fatty alcohol polyoxyethylene ether sodium sulfate 10kg, sodium amino acid 12kg, active attapulgite 13kg, vanadium pentoxide 0.1kg, lipase 7kg, sorbitan fatty acid ester 5kg, sodium p-hydroxybenzenesulfonate 18kg, tert-butyl hydroperoxide 3kg and diethylene glycol laurate 0.1kg. According to the following steps, the above-mentioned raw materials are prepared into a neutral plug-removing agent composition for an oil recovery formation in an oil field:

[0073] 1, 30kg of sodium polyepoxysuccinate, 23kg of sodium gluconate, 2.5kg of polyethylene glycol, 2.5kg of triethanolamine, 12kg of ethyl lactate and 5.5kg of active attapulgite are crushed with a grinder; the rest are the same as in the examples 1.

[0074] 2. With fatty alcohol polyoxyethylene ether sodium sulfate 10kg, amino acid sodium 12kg and active ...

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Abstract

The invention relates to a neutral blockage removing agent composition used for an oil recovery formation in an oilfield. The neutral blockage removing agent composition is prepared from the following raw materials in parts by weight: 30-36 parts of disodium polyepoxysuccinicate, 18-25 parts of sodium gluconate, 2-3 parts of polyethylene glycol, 2-4 parts of triethanolamine, 9-12 parts of ethyl lactate, 7-10 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 8-12 parts of amino acid sodium, 10-15 parts of activated attapulgite, 0.1-0.2 part of vanadium pentoxide, 5-7 parts of lipase, 5-8 parts of sorbitan fatty acid ester, 15-18 parts of P-hydroxy sodium sulfonate, 3-7 parts of tert-butyl hydroperoxide and 0.1-0.3 part of diethylene glycol monolaurate. The neutral blockage removing agent composition has high blockage removing speed, is neutral, is free of corrosion and can quickly dissolve material scales, asphalt sediment scales, carbonate scales, silicate scales and the like generated by an ASP flooding system; waste liquid for blockage removal can be degraded and does not need to be discharged onto the ground to be subjected to sewage treatment, the formation in the oilfield is cleaned to remove the blockage, no corrosion, dead angle, precipitation or secondary well blockage is generated, and the blockage removal time does not exceed 24 hours.

Description

technical field [0001] The invention relates to an auxiliary agent used in oil recovery in an oil field, in particular to a neutral plugging remover composition for an oil recovery formation in an oil field, and also relates to a preparation method for the neutral plug removal agent composition for an oil recovery formation in an oil field. Background technique [0002] First, the question [0003] 1. Many oilfields at home and abroad are plagued by scaling damage to varying degrees during water injection production, especially in the middle and late stages of production. With the increase of oil water content, scaling problems become more common and serious. Due to oilfield water scale damage to the oil layer, the wellbore of the oil production well, the wellbore of the water injection well and the oil production pump and equipment system are blocked, which leads to premature failure of the oil well, oil production pump and equipment. These problems have greatly increased ...

Claims

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Application Information

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