CN105462573B - A kind of oilfield injection well augmented injection de-plugging agent - Google Patents
A kind of oilfield injection well augmented injection de-plugging agent Download PDFInfo
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- CN105462573B CN105462573B CN201410455623.8A CN201410455623A CN105462573B CN 105462573 B CN105462573 B CN 105462573B CN 201410455623 A CN201410455623 A CN 201410455623A CN 105462573 B CN105462573 B CN 105462573B
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Abstract
The present invention provides a kind of oilfield injection well augmented injection de-plugging agent, and the raw material that it is matched by following parts by volume is constituted：A. detergent for crude petroleum 1.0~5.0, b. redox systems 0.1~1.0, c. clay stabilizers 2.0~4.0.The redox system is by oxidant：Reducing agent=1:0.2~0.5 proportion by weight is constituted；The clay stabilizer refers to KCl, NH4Cl, polyquaternium or quaternary ammonium salt.The present invention is using redox system as host agent, it forms to note to gather with detergent for crude petroleum, clay stabilizer etc. simultaneously and turns water drive well de-plugging agent, the oxygen that oxidant generates is converted to hydroxyl free radical by the de-plugging agent due to the use of redox system, it is generated without gas in reservoir of constructing, system is non-corrosive simultaneously, is a kind of safety and environmental protection, de-plugging system with strong points.
Description
Technical field：
The present invention relates to a kind of for the well of difficult water injection after injection well subsequent waterflooding during tertiary oil production in oil field
Augmented injection system.Particular for the increasing injection system using polyacrylamide and its derivative as the water injection well of flooding polymers.
Background technology：
Tertiary oil recovery is important one of the development scheme in current oil field, has successively carried out the poly- work of note to a large amount of water injection well
Make, achieves good development effectiveness.But generally there is water injection pressure liter during noting poly- subsequent waterflooding in water injection well
Phenomenon high, injection is difficult, it is difficult to which the case where reaching with fluence is analyzed with live well-flushing sand washing, and tamper is complicated, including polymerization
Object aggregate and reservoir silt and various dirty samples, complicated tamper and blocking mechanism cause the big spy of de-plugging process difficulty
Point.At present to the de-plugging of such under-injected well mainly based on being acidified, fill, since specific aim is not strong, technique is single, and effect is not
It is good, it is difficult to solve site problems, be badly in need of carrying out relevant technology research, solve injection well water filling problem.
The techniques such as conventional acidulation, filling carry out de-plugging work, and effect is poor, and the term of validity is short；Use chlorine dioxide, hydrogen peroxide
Equal strong oxidizers have certain effect as de-plugging agent, but safety is poor, is not suitable for storage and transportation and site operation.Peace cannot be met
Entirely, environmental requirement.The block releasing technique to such well reported can be divided into two classes, and the first kind is with strong oxidizer chlorine dioxide, double
Oxygen water etc. carries out de-plugging construction to reservoir, but since it is with stronger corrosivity, while can be produced in storage and transportation and work progress
Raw explosive gas, bigger difficulty and security risk are caused to work progress；Hao Zhanyuan etc. (CN 1435464) utilizes Asia
Sodium chlorate or sodium chlorate produce chlorine dioxide with phosphoric acid or citric acid reactions in underground；Zhao Yingqiu etc. (CN 1247734C,
CN102925128A a kind of composite deblocking process) has been invented, has been mainly calper calcium peroxide and peroxide uncle to polymer de-plugging composition
The mixture of butanol；Hu Xinsuo etc. (CN 1480628) has invented a kind of method for removing blockage to stratum injection hydrolyst ADS；
Lin Aiguo et al. has invented a kind of as the main component with biradical solidification decomposition agent, dispersant, self generating gas foaming energization diffusant
De-plugging agent prescription.
Invention content：
The purpose of the present invention overcomes the shortcomings of the prior art, and subsequently turns the problem of water drive well is shorted for note is poly-, carries
It is efficient for a kind of de-plugging, without gas generate, non-corrosive, safe oilfield injection well augmented injection de-plugging agent.
The purpose of the present invention can be achieved by the following technical measures：
The raw material that the de-plugging agent is matched by following parts by volume is constituted：
A. 1.0~5.0 b. oxidation-reduction systems 0.1~1.0 of detergent for crude petroleum
C. clay stabilizer 2.0~4.0.
The purpose of the present invention can be also achieved by the following technical measures：
The oxidation-reduction system is by oxidant：Reducing agent=1:0.2~0.5 proportion by weight is constituted；
The oxidant includes and is not limited only to potassium ferrate, potassium permanganate, calper calcium peroxide, potassium peroxydisulfate, persulfuric acid
Sodium or ammonium persulfate；
The preferred potassium ferrate of the oxidant, potassium permanganate, calper calcium peroxide, potassium peroxydisulfate, sodium peroxydisulfate or persulfuric acid
Ammonium；
The reducing agent includes and is not limited only to sodium sulfite, ferrous sulfate or stannous oxide；
The preferred sodium sulfite of the reducing agent, ferrous sulfate or stannous oxide；
The clay stabilizer includes and is not limited to KCl, NH4Cl, polyquaternium or quaternary ammonium salt；
The clay stabilizer refers to KCl, NH4Cl, polyquaternium or quaternary ammonium salt.
Above-mentioned detergent for crude petroleum main function is to clean the sump oil that polymer and rock surface are attached in well；Oxidation-
Reduction system is the oxidation-reduction system formed by oxidant and reducing agent, i.e., is passing through oxidationreduction body during the reaction
System generates the chemical substance of hydroxyl free radical；The effect of clay stabilizer is mainly to prevent depolymerizing agent from causing clay swell, fortune
Shifting causes reservoir to damage.
In use, by the de-plugging agent of the present invention according to de-plugging agent under room temperature：Water=1:20~100 parts by volume proportioning is added
Water, stirring are miscible.
The present invention forms to note to gather and turns water using oxidation-reduction system as host agent with detergent for crude petroleum, clay stabilizer
Well de-plugging agent is driven, which is converted to hydroxyl free radical due to the use of oxidation-reduction system by the oxygen that oxidant generates,
It is generated without gas in reservoir of constructing, while system is non-corrosive, safety and environmental protection.
Using the present invention, can be blocked caused by the dissolving field polymers of highly effective and safe, while protection is played to reservoir and is made
With de-plugging is efficient, and being blocked caused by polymer thoroughly to release, and overcome the hidden danger of common de-plugging agent insecurity；
Increase in-place permeability, improve crude oil fluidity, increases the water injection rate of well, reduces well injection pressure；Configuration is simple, uses
It is convenient, shorten the construction time, reduces construction cost；Compare traditional strong oxidizer depolymerizing agent, depolymerizing agent of the present invention simultaneously
The high safety in storage and transportation and work progress, non-explosive and toxic and harmful gas generate, and are that one kind being suitable for oilfield injection turn
Water drive well augmented injection de-plugging agent.Depolymerizing agent pH of the present invention is between 6-7 simultaneously, to construction equipment and operating tool string without corruption
Erosion acts on.
Specific implementation mode：
Embodiment 1：
It takes 1.0 mass parts potassium ferrates to be mixed with 0.2 mass parts sodium sulfite, obtains oxidation-reduction system；
5.0 parts by volume detergent for crude petroleum and 0.1 parts by volume oxidation-reduction system, 4.0 parts by volume KCl mixings are taken, oil field is obtained
Injection well augmented injection de-plugging agent product.
In use, by the oilfield injection well augmented injection de-plugging agent of the present invention according to de-plugging agent under room temperature：Water=1:100 bodies
Water is added in product part proportioning, and stirring is miscible.
Embodiment 2：
It takes 01.0 mass parts potassium ferrate to be mixed with 0.5 mass parts sodium sulfite, obtains oxidation-reduction system；
1.0 parts by volume detergent for crude petroleum and 1.0 parts by volume oxidation-reduction systems, 2.0 parts by volume KCl mixings are taken, oil field is obtained
Injection well augmented injection de-plugging agent product.
In use, by the oilfield injection well augmented injection de-plugging agent of the present invention according to de-plugging agent under room temperature：Water=1:20 bodies
Water is added in product part proportioning, and stirring is miscible.
Embodiment 3：
It takes 1 mass parts potassium ferrate to be mixed with 0.35 mass parts sodium sulfite, obtains oxidation-reduction system；
3.0 parts by volume detergent for crude petroleum and 0.5 parts by volume oxidation-reduction system, 3.0 parts by volume KCl mixings are taken, oil field is obtained
Injection well augmented injection de-plugging agent product.
In use, by the oilfield injection well augmented injection de-plugging agent of the present invention according to de-plugging agent under room temperature：Water=1:60 bodies
Water is added in product part proportioning, and stirring is miscible.
Embodiment 4：
The difference is that potassium ferrate is replaced with potassium permanganate, it is other respectively with embodiment 1-3.
Embodiment 5：
The difference is that potassium ferrate is replaced with calper calcium peroxide, it is other respectively with embodiment 1-3.
Embodiment 6：
The difference is that potassium ferrate is replaced with potassium peroxydisulfate, it is other respectively with embodiment 1-3.
Embodiment 7：
The difference is that potassium ferrate is replaced with sodium peroxydisulfate, it is other respectively with embodiment 1-3.
Embodiment 8：
The difference is that potassium ferrate is replaced with ammonium persulfate, it is other respectively with embodiment 1-3.
Embodiment 9：
The difference is that sodium sulfite is replaced with ferrous sulfate, it is other respectively with embodiment 1-8.
Embodiment 10：
The difference is that sodium sulfite is replaced with stannous oxide, it is other respectively with embodiment 1-8.
Embodiment 11：
The difference is that using NH4Cl replaces KCl, other respectively with embodiment 1-10.
Embodiment 12：
The difference is that KCl is replaced with polyquaternium, it is other respectively with embodiment 1-10.
Embodiment 13：
The difference is that KCl is replaced with quaternary ammonium salt, it is other respectively with embodiment 1-10.
Above example is only present invention embodiment therein, is not intended to restrict the invention, although with reference to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features.All essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
1 each embodiment of subordinate list is to Polyacrylamides For Enhanced Oil Recoveries depolymerization effect assessment table
2 each embodiment of subordinate list is to being crosslinked displacement of reservoir oil polyacrylamide depolymerization effect assessment table
Claims (1)
1. a kind of oilfield injection well augmented injection de-plugging agent, it is characterised in that the raw material that it is matched by following parts by volume is constituted：
A. 1.0~5.0 b. oxidation-reduction systems 0.1~1.0 of detergent for crude petroleum
C. clay stabilizer 2.0~4.0；
The oxidation-reduction system is by oxidant：Reducing agent=1:0.2~0.5 proportion by weight is constituted；The oxidant
Refer to potassium ferrate, potassium permanganate, calper calcium peroxide, potassium peroxydisulfate, sodium peroxydisulfate or ammonium persulfate；The reducing agent refers to Asia
Sodium sulphate, ferrous sulfate or stannous oxide；The clay stabilizer refers to KCl, NH4Cl, polyquaternium or quaternary ammonium salt.
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| CN201410455623.8A CN105462573B (en) | 2014-09-09 | 2014-09-09 | A kind of oilfield injection well augmented injection de-plugging agent |
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| CN105462573B true CN105462573B (en) | 2018-08-17 |
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| CN106634915B (en) * | 2016-12-30 | 2019-06-21 | 西南石油大学 | A kind of heavy crude well polymer blocking remover |
| CN109504359B (en) * | 2019-01-17 | 2022-06-28 | 山东滨州昱诚化工科技有限公司 | High-molecular polyacrylamide degradation blocking remover for oil extraction in oil field and preparation method thereof |
| CN111218266A (en) * | 2020-03-04 | 2020-06-02 | 中国海洋石油集团有限公司 | Composite blocking remover for polymer flooding reservoir and preparation and application methods thereof |
| CN111234794B (en) * | 2020-03-18 | 2020-10-27 | 北京大德广源石油技术服务有限公司 | Composite blocking remover and application method thereof |
| CN111607371B (en) * | 2020-04-30 | 2022-08-02 | 中海石油（中国）有限公司天津分公司 | Efficient blockage removing system for polymer flooding injection well, preparation method and application of efficient blockage removing system |
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| EP3409782A1 (en) * | 2009-10-08 | 2018-12-05 | DSM IP Assets B.V. | Process for the preparation of a fermentation prodcut from lignocellulose containing material |
| CN102757776B (en) * | 2011-04-27 | 2014-04-09 | 克拉玛依新科澳石油天然气技术股份有限公司 | Low-temperature rubber crushing accelerator for well fracturing |
| CN102925128B (en) * | 2012-11-05 | 2014-06-18 | 中国海洋石油总公司 | Compound chemical blocking removing agent of oil field polymer injection well |
| CN103436244A (en) * | 2013-02-28 | 2013-12-11 | 黑龙江昊辰能源开发有限公司 | Composite unblocking agent and method for composite unblocking by using temporary blocking agent and composite unblocking agent |
| CN103113864B (en) * | 2013-02-28 | 2014-09-17 | 黑龙江昊辰能源开发有限公司 | Temporary blocking agent, composite blockage removal agent and combined blockage removal method using temporary blocking agent and composite blockage removal agent |
| CN105358651B (en) * | 2013-05-03 | 2020-02-21 | 凯米罗总公司 | Iron-containing breaker compounds and methods of their use |
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