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Biochemical coupling-effect blocking remover and preparation method thereof

A technology of plugging remover and composite plugging remover, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as stratum scaling and plugging, pipeline corrosion environment, and destruction of sandstone cement

Inactive Publication Date: 2020-04-03
李国斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the incompatibility between the injected water and the formation water, formation scaling and clogging are caused, the difficulty of mining is gradually increased, and the decline in recovery rate is increasing.
[0003] The current oilfield chemical flooding methods are mostly polymer flooding and triple compound flooding. With the increase of chemical flooding agent injection time, formation plugging and rock dissolution will become prominent, and the recovery rate will drop rapidly.
There are many by-products in formation acidification plugging removal measures, which can easily damage the permeability of the oil layer again, destroy the cement of the sandstone, cause serious sand production in the oil well, bring new blockages to the formation, and easily cause corrosion of equipment and pipelines when the waste liquid is flowed back and environmental pollution

Method used

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  • Biochemical coupling-effect blocking remover and preparation method thereof
  • Biochemical coupling-effect blocking remover and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] A biochemical combined effect plugging remover, the plugging remover includes a chemical composite plugging remover and a microbial oil flooding plugging remover;

[0021] The chemical composite plugging agent includes the following raw material components in parts by weight: 100 parts of sodium polyepoxysuccinate, 70 parts of sodium edetate, 80 parts of hydroxysuccinamide, 20 parts of diisobutyl carbinol 30 parts, 30 parts of sodium allyl sulfonate, 20 parts of sodium lignin sulfonate, 30 parts of sodium citrate sulfonate; the described microbial oil flooding and unblocking agent includes the following raw material components: Halomonas 8 10 parts, 10 parts of Bacillus subtilis, 10 parts of Bacillus cloinosa, 12 parts of Pseudomonas.

[0022] The preparation method of the above-mentioned plugging agent, the steps are as follows: S1, the preparation of the chemical composite plugging agent: take sodium polyepoxysuccinate, sodium ethylenediaminetetraacetate, hydroxysucci...

Embodiment 2

[0027] A biochemical combined effect plugging remover, the plugging remover includes a chemical composite plugging remover and a microbial oil flooding plugging remover;

[0028] The chemical composite deblocking agent includes the following raw material components in parts by weight: 90 parts of sodium polyepoxysuccinate, 60 parts of sodium edetate, 70 parts of hydroxysuccinamide, 10 parts of diisobutyl carbinol 20 parts, 20 parts of sodium allyl sulfonate, 10 parts of sodium lignin sulfonate, 20 parts of sodium citrate sulfonate; the described microbial oil flooding and unblocking agent includes the following raw material components: Halomonas 9 11 parts, 11 parts of Bacillus subtilis, 11 parts of Bacillus chlamydia, and 13 parts of Pseudomonas.

[0029] The preparation method of the above-mentioned plugging agent, the steps are as follows: S1, the preparation of the chemical composite plugging agent: take sodium polyepoxysuccinate, sodium ethylenediaminetetraacetate, hydrox...

Embodiment 3

[0034] A biochemical combined effect plugging remover, the plugging remover includes a chemical composite plugging remover and a microbial oil flooding plugging remover;

[0035] The chemical composite plugging agent includes the following raw material components in parts by weight: 110 parts of sodium polyepoxysuccinate, 80 parts of sodium edetate, 90 parts of hydroxysuccinamide, 30 parts of diisobutyl carbinol 40 parts, 40 parts of sodium allyl sulfonate, 30 parts of sodium lignin sulfonate, 40 parts of sodium citrate sulfonate; the described microbial oil flooding and unblocking agent includes the following raw material components: Halomonas 7 9 parts, 9 parts of Bacillus subtilis, 9 parts of Bacillus chlamydia, and 11 parts of Pseudomonas.

[0036] The preparation method of the above-mentioned plugging agent, the steps are as follows: S1, the preparation of the chemical composite plugging agent: take sodium polyepoxysuccinate, sodium ethylenediaminetetraacetate, hydroxysuc...

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Abstract

The invention discloses a biochemical coupling-effect blocking remover and a preparation method thereof, and relates to the technical field of preparation of blocking removers. The blocking remover comprises a chemical composite blocking remover and a microbial oil displacement blocking remover; the chemical composite blocking remover is composed of the following raw material components: sodium polyepoxysuccinate, sodium ethylene diamine tetracetate, ammonium hydroxysuccinate, diisobutyl methanol, sodium allysulfonate, sodium lignin sulfonate and sodium succinic acid ester sulfonate. The microbial oil displacement blocking remover is composed of the following raw material components: halomonas, bacillus subtilis, bacillus chlamydosporium and pseudomonas. The blocking remover disclosed by the invention not only has an oil displacement function, but also has a blocking removing function of dissolving organic and inorganic blocking substances of stratum and recovering the permeability ofan oil layer; after the blocking remover enters the stratum, no by-product is generated, various material scales can be rapidly dissolved, and blocking removing products and working fluid do not needto flow back; the corrosion rate is less than 0.9 g / m<2>*h, the highest scale dissolving rate can reach 95%, and the highest rock core permeability recovery rate can reach 93.79%.

Description

technical field [0001] The invention relates to the technical field of plug-removing agent preparation, in particular to a biochemical combined-effect plug-removing agent and a preparation method thereof. Background technique [0002] At present, seven of my country's top ten oil and gas fields have been exploited for more than 30 years, and have generally entered the stage of high recovery and high water cut. Due to the incompatibility of the injected water and the formation water, formation scaling and clogging are caused, the difficulty of mining is gradually increased, and the decline rate of recovery rate is increasing. [0003] The current oilfield chemical flooding methods are mostly polymer flooding and triple compound flooding. With the increase of chemical flooding agent injection time, formation plugging and rock dissolution will become prominent, and the recovery rate will drop rapidly. There are many by-products in formation acidification plugging removal measu...

Claims

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Application Information

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IPC IPC(8): C09K8/58C09K8/582C09K8/524C09K8/528
CPCC09K8/524C09K8/528C09K8/58C09K8/582
Inventor 李国斌
Owner 李国斌
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