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Neutral blockage removing agent composition used for oil recovery formation in oilfield and preparation method thereof

The technology of a plug removing agent and composition is applied in the field of preparation of neutral plug removing agent composition in oilfield oil production formation and neutral plug removing agent composition in oilfield oil production formation, which can solve the problem of failure, oil production well, oil pump oil conveying equipment Corrosion and other problems, to achieve the effect of fast chemical descaling, safe and reliable solvent blocking removal

Active Publication Date: 2014-12-10
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. Weigh the raw materials: 35kg sodium polyepoxysuccinate, 20kg sodium gluconate, 2kg polyethylene glycol, 2kg triethanolamine, 9kg ethyl lactate, 9kg fatty alcohol polyoxyethylene ether sodium sulfate, 11kg sodium amino acid, Active attapulgite 14kg, vanadium pentoxide 0.2kg, lipase 5kg, sorbitan fatty acid ester 6kg, sodium p-hydroxysulfonate 15kg, hydrogen peroxide tert-butyl 4kg and diethylene glycol laurate 0.2kg.

[0061] The above-mentioned raw materials are prepared into a neutral plug-removing agent composition for oil field production formation according to the following steps:

[0062] 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. After passing through a 20-mesh sieve, use a mixer Stir for 40 minutes until uniform, to obtain the first powder.

[0063] 2. Mix 9kg of fatty alcohol polyoxyethylene ether sodium sulfate...

Embodiment 2

[0067] Example 2. Weigh the raw materials: 33kg sodium polyepoxysuccinate, 18kg sodium gluconate, 3kg polyethylene glycol, 3kg triethanolamine, 10kg ethyl lactate, 7kg fatty alcohol polyoxyethylene ether sodium sulfate, 8.5kg sodium amino acid , Active attapulgite 10kg, vanadium pentoxide 0.15kg, lipase 6kg, sorbitan fatty acid ester 8kg, sodium p-hydroxysulfonate 16kg, tert-butyl hydrogen peroxide 6kg and diethylene glycol laurate 0.16kg .

[0068] The above-mentioned raw materials are prepared into a neutral plug-removing agent composition for oil field production formation according to the following steps:

[0069] 1. Use a grinder to crush 33 kg of sodium polyepoxysuccinate, 18 kg of sodium gluconate, 3 kg of polyethylene glycol, 3 kg of triethanolamine, 10 kg of ethyl lactate and 4 kg of active attapulgite; the rest are the same as in Example 1.

[0070] 2. Mix 7 kg of fatty alcohol polyoxyethylene ether sodium sulfate, 8.5 kg of amino acid sodium, and 5 kg of active attapulgit...

Embodiment 3

[0074] Example 3, weighing the raw materials: 30kg of sodium polyepoxysuccinate, 23kg of sodium gluconate, 2.5kg of polyethylene glycol, 2.5kg of triethanolamine, 12kg of ethyl lactate, 10kg of fatty alcohol polyoxyethylene ether sodium sulfate, sodium amino acid 12kg, active attapulgite 13kg, vanadium pentoxide 0.1kg, lipase 7kg, sorbitan fatty acid ester 5kg, sodium p-hydroxysulfonate 18kg, tert-butyl hydrogen peroxide 3kg and diethylene glycol laurate 0.1 kg.

[0075] The above-mentioned raw materials are prepared into a neutral plug-removing agent composition for oil field production formation according to the following steps:

[0076] 1. Crush 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 with a grinder; the rest are the same as the embodiment 1.

[0077] 2. Mix 10 kg of fatty alcohol polyoxyethylene ether sodium sulfate, 12 kg of amino acid sodium, and ...

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