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An acidifying deblocking agent

A technology of plugging agent and inorganic acid, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of poor oil layer acidification effect, etc., and achieve good effect, improve oil recovery rate and water injection rate, and increase permeability.

Active Publication Date: 2019-04-16
大庆市杰森钻采助剂厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the problem that existing plugging removers in the background technology have poor acidification effects on oil layers in remote areas, and provide an acidizing plugging remover

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First add 100g of hydrochloric acid, 25g of hydrofluoric acid, 10g of nitric acid powder, 5g of acetic acid, 5g of citric acid, 2.5g of disodium edetate, 5g of corrosion inhibitor, 5g of clay stabilizer, and SP-169 demulsifier in 316g of water 2.5g, after stirring evenly, add 7.5g of oil washing agent, 2.5g of JFC penetrant, 2.5g of ethylene glycol butyl ether, 10g of methanol, and finally add 1.5g of non-ionic fluorocarbon surfactant to prepare the product of acidifying plugging remover 500g. Test surface tension: 17mN / m, demulsification rate: 94%, corrosion rate: 0.98 g / m 2 h.

Embodiment 2

[0014] First add 125g of hydrochloric acid, 35g of hydrofluoric acid, 15g of nitric acid powder, 5g of acetic acid, 5g of citric acid, 2.5g of disodium edetate, 6g of corrosion inhibitor, 5g of clay stabilizer, and SP-169 demulsifier in 275g of water 2.5g, after stirring evenly, add 7.5g of oil washing agent, 2.5g of JFC penetrant, 2.5g of ethylene glycol butyl ether, 10g of methanol, and finally add 1.5g of non-ionic fluorocarbon surfactant to prepare the product of acidifying plugging remover 500g. Test surface tension: 17mN / m, demulsification rate: 95%, corrosion rate: 1.2 g / m 2 h.

[0015] The corrosion inhibitor used in the embodiment is the model YXH-1 corrosion inhibitor produced by Shandong Binzhou Yucheng Chemical Technology Co., Ltd.; the oil washing agent is the TCZ-1 oil washing agent produced by Shandong Binzhou Yucheng Chemical Technology Co., Ltd.; JFC The penetrant was produced by Shenyang Mingyang Anticorrosion Research Institute.

[0016] The acidification...

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Abstract

The invention relates to an acidizing blockage remover, aiming to solve the problem that an existing blockage remover is poor in acidizing effect of oil formations in farther zones. The acidizing blockage remover comprises, by weight, 1-30% of inorganic acid, 0.5-2.0% of organic acid, 0.5-2.0% of complexing agent, 0.5-1.5% of scrubbing agent, 0.5-1.5% of corrosion inhibitor, 1-3% of clay stabilizer, 0.3-0.5% of demulsifying agent, 0.3-0.5% of penetrating agent, 0.3-2% of mutual solvent, 0.1-0.5% of surfactant and the balance water. The acidizing blockage remover is long in effective period and excellent in acidizing blockage removal effect when used for acidizing the farther zones.

Description

technical field [0001] The invention relates to a treatment agent in the field of oil recovery technology, in particular to an acidizing plug-removing agent and a preparation method thereof. Background technique [0002] In the process of oilfield exploitation, the oil layer will be blocked due to various reasons in the production process, resulting in a decrease in permeability and production. In order to ensure the normal production of the oilfield, restore or increase the permeability of the formation, and realize the increase of production and injection of oil and water wells, it is necessary to remove the pollution and blockage of the oil layer, remove the blockage of the oil layer, and increase the permeability of the oil layer. [0003] Conventional acidizing plugging removal technology mainly relies on hydrochloric acid and soil acid (a mixture of hydrochloric acid and hydrofluoric acid prepared in a certain proportion) to acidify the formation, which can quickly dis...

Claims

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Application Information

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IPC IPC(8): C09K8/524C09K8/528
CPCC09K8/524C09K8/528C09K2208/32
Inventor 周东材王映丽
Owner 大庆市杰森钻采助剂厂
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