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Composite multifunctional chemical unblocking agent

A multi-functional, plug-relieving technology, applied in drilling equipment and other directions, can solve the problems of excessive dissolution of rocks and mines in near-well oil layers, affecting the effect of acidification and plug-removing, and poor deep treatment effect, and achieves good comprehensive plug-removing performance and slow speed. Excellent effect, the effect of protecting the oil layer

Inactive Publication Date: 2005-06-08
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional acidizing plugging removal has problems such as excessive dissolution of near-well oil layer rocks, poor deep treatment effect, and secondary precipitation, which seriously affects the effect of acidizing plugging removal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) BHJ-A organic multifunctional plugging remover:

[0059] C9 aromatics: 70%

[0060] Nonylphenol polyoxyethylene (15) ether: 5%

[0061] Bohai oil demulsifier BH-01: 2%

[0062] Polyoxyethylene alkyl alcohol ether-8: 3%

[0063] Polyoxyethylene alkyl alcohol ether-10: 5%

[0064] Ethylene glycol monobutyl ether: 8%

[0065] Polyoxyethylene alkylphenol ether-7: 7%;

[0066] (2) BHJ-B inorganic multifunctional plugging remover:

[0067] 30% industrial hydrochloric acid: 20%

[0068] 40% fluoroboric acid: 60%;

[0069] Diethylenetriaminepentaacetic acid: 4%

[0070] Bohai Petroleum BX-1 demulsifier: 3%

[0071] Amphoteric imidazoline slow corrosion inhibitor: 6%

[0072] Polyquaternary: 3%

[0073] Sodium Erythorbate: 3%

[0074] Polyoxyethylene alkyl alcohol ether-8: 1%;

[0075] (3) BHJ-C composite multifunctional synergist:

[0076] 30% industrial hydrochloric acid: 60%

[0077] 98% industrial acetic acid: 20%;

[0078] Amphoteric imidazoline slow corro...

Embodiment 2

[0083] (1) BHJ-A organic multifunctional plugging remover:

[0084] C8 Aromatics: 75%

[0085] Nonylphenol polyoxyethylene (10) ether: 8%

[0086] Bohai oil demulsifier BH-09: 1%

[0087] Polyoxyethylene alkyl alcohol ether-20: 3%

[0088] Polyoxyethylene alkyl alcohol ether-7: 4%

[0089] Ethylene glycol monobutyl ether: 6%

[0090] Polyoxyethylene alkylphenol ether-7: 4%

[0091] BHJ-B inorganic multifunctional plugging agent:

[0092] 30% industrial hydrochloric acid: 25%

[0093] 50% fluoroboric acid: 55%;

[0094] Amphoteric imidazoline slow corrosion inhibitor: 6%;

[0095] Organic polyamine complexing agent: 4%

[0096] Bohai Petroleum BH-12 demulsifier: 3%

[0097] Cationic polyacrylamide: 3%

[0098] Nitrotriacetic acid: 3%

[0099] Polyoxyethylene alkyl ether-8: 1%.

[0100] (2) BHJ-C composite multifunctional synergist:

[0101] 30% industrial hydrochloric acid: 50%

[0102] 98% industrial acetic acid: 35%;

[0103] Amphoteric imidazoline slow corros...

Embodiment 3

[0108] (1) BHJ-A organic multifunctional plugging remover:

[0109] C10 Aromatics: 65%

[0110] Nonylphenol polyoxyethylene (10) ether: 10%

[0111] Polyoxyethylene alkylphenol formaldehyde resin (BH-01): 2%

[0112] Polyoxyethylene alkyl alcohol ether-20: 8%

[0113] Polyoxyethylene alkyl alcohol ether-8: 5%

[0114] Diethylene glycol butyl ether: 10%

[0115] (2) BHJ-B inorganic multifunctional plugging remover.

[0116] 30% industrial hydrochloric acid: 33%

[0117] 45% fluoroboric acid: 38%;

[0118] Amphoteric imidazoline slow corrosion inhibitor: 6%;

[0119] Organic polyamine complexing agent: 4%

[0120] Bohai Petroleum BH-12 Demulsifier: 5%

[0121] Cationic polyacrylamide: 3%

[0122] Nitrilotriacetic acid: 6%

[0123] Polyoxyethylene alkanol ether-8: 5%.

[0124] (3) BHJ-C composite multifunctional synergist:

[0125] 30% industrial hydrochloric acid: 45%

[0126] 98% industrial acetic acid: 40%;

[0127] Amphoteric imidazoline slow corrosion inhibito...

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PUM

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Abstract

The invention relates to a composite multifunctional chemical plugging agent, which is composed of an organic multifunctional plugging agent, an inorganic multifunctional plugging agent and a composite synergist. The main components include carbon 7-10 aromatic hydrocarbon organic solvents, polyoxyethylene ether surfactants, oil-soluble water-dispersed polyether demulsifiers, T penetrants, polyether wetting agents, mutual solvents, and insoluble scale conversion agents , organic / inorganic compound acid, cationic polymer clay stabilizer, water-soluble polyether demulsifier, iron ion stabilizer, polyether wetting improver, dissolution aid, slow corrosion inhibitor, cationic polymer Sand stabilizer, etc. Inject 50-100% aqueous solution of organic multi-functional plugging remover, 5-35% aqueous solution of inorganic multi-functional plugging remover, and 25-35% aqueous solution of composite synergist into oil-water wells according to the usual method of using plugging remover, To play their respective effects and synergistic effect, the retarding effect of the plugging agent is excellent, which is 10 times that of conventional earth acid.

Description

technical field [0001] The invention belongs to chemical preparations, in particular to a composite multifunctional chemical plugging agent. Background technique [0002] Chemical plugging removal is one of the important measures to increase oil well production and water well injection. Deep treatment and improvement of plugging removal effect are important topics in the research of chemical plugging removal technology. Conventional chemical plugging removal technology has limitations to varying degrees. Studies have shown that chemical plugging removal not only effectively removes complex blockages caused by various reasons in oil layers, but also prevents secondary sedimentation in reservoirs after plugging removal, such as sensitive In order to exert the best plugging effect, it can exert the best plugging effect due to sexual damage, blockage damage caused by excessive dissolution of rock ore and destruction of rock skeleton, and other typ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
Inventor 易飞程艳李成见何瑞兵刘文辉
Owner CHINA NAT OFFSHORE OIL CORP
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