CN108373911A - Blockages relieving fluid and preparation method thereof is chelated applied to middle and high infiltration sandstone reservoir - Google Patents
Blockages relieving fluid and preparation method thereof is chelated applied to middle and high infiltration sandstone reservoir Download PDFInfo
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- CN108373911A CN108373911A CN201810347255.3A CN201810347255A CN108373911A CN 108373911 A CN108373911 A CN 108373911A CN 201810347255 A CN201810347255 A CN 201810347255A CN 108373911 A CN108373911 A CN 108373911A
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
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Abstract
Being applied to middle and high infiltration sandstone reservoir the invention discloses one kind and chelating blockages relieving fluid and preparation method thereof, component and weight percent are as follows：The auxiliary agent of the DOTA derivatives of 18 25 parts by weight, the ferrous stability of 4 10 parts by weight, the surfactant of 5 15 parts by weight, the clay stabilizer of 4 10 parts by weight, 5 12 parts by weight, remaining is water；Preparation method of the present invention is to chelate blockages relieving fluid each component ratio in the middle and high infiltration sandstone reservoir that is applied to, and water, auxiliary agent, DOTA derivatives, ferrous stability, clay stabilizer, surfactant is successively added, compounds after mixing.The present invention is applied to the shortcomings that middle and high infiltration sandstone reservoir chelating blockages relieving fluid and preparation method thereof can evade conventional acidulation, the clay that can solve the problems, such as common chelating agents corrosion not again, compared with regular mud acid, without acid in its good with stability, low to clay corrosion rate, system, the features such as to equipment and low tube corrosion.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly to a kind of middle and high infiltration sandstone reservoir that is applied to chelate blockages relieving fluid
And preparation method thereof.
Background technology
Currently, the de-plugging of middle and high infiltration sandstone reservoir is handled frequently with conventional acidulation, but there are the following problems：
(1) conventional acidulation corrosivity is strong, high to de-plugging equipment requirement；
(2) erodible strong, the excessive corrosion of middle and high infiltration layer is easily caused, formation sand production is made；
(3) such as cannot the row of returning, secondary precipitation in time it is serious to formation damage；
(4) it is difficult to return drain processing for acidification.
Therefore, how to design the shortcomings that one kind can evade conventional acidulation and solved common chelating agents corrosion not and stick
Middle and high infiltration sandstone reservoir chelating blockages relieving fluid, preparation method and the method for removing blockage of native problem, are the projects that the present inventor concentrates on studies.
Invention content
The purpose of the present invention is to provide a kind of chelating de-plugging systems applied to middle and high infiltration sandstone reservoir de-plugging, can
The shortcomings that evading conventional acidulation, and can solve the problems, such as common chelating agents corrosion not clay has compared with regular mud acid
Stability is good, in, system low to clay corrosion rate without acid, the features such as to equipment and low tube corrosion.
To achieve the goals above, the present invention provides a kind of applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid, component
And weight percent is as follows：The DOTA derivatives of 18-25 parts by weight, the ferrous stability of 4-10 parts by weight, 5-15 parts by weight
Surfactant, the clay stabilizers of 4-10 parts by weight, 5-12 parts by weight auxiliary agent, remaining is water.
Preferably, the ferrous stability is one or more of mixtures of citric acid, arabo-ascorbic acid, EDTA.
Preferably, the surfactant is the mixing of fluorocarbon surfactant, polyoxyethylene polyoxypropylene octadecyl alcolol ether
Object.
Preferably, the clay stabilizer is cation quaternary ammonium salt.
Preferably, the auxiliary agent is the mixture of polyvinyl alcohol, low-carbon alcohol ether.
A kind of preparation method applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid, described in described claims 1 or 2
Be applied to middle and high infiltration sandstone reservoir chelate blockages relieving fluid each component ratio, successively be added water, auxiliary agent, DOTA derivatives, iron ion
Stabilizer, clay stabilizer, surfactant, compound after mixing.
Preferably, the preparation temperature is 45-50 DEG C.
Preferably, the preparation time is 3-4h.
After adopting the above scheme, the present invention at sea answers in oil field extensively applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid
With, the shortcomings that conventional acidulation can be evaded and the clay that solved the problems, such as common chelating agents corrosion not, with regular mud acid phase
Than, without acid in good with stability, low to clay corrosion rate, system, the features such as to equipment and low tube corrosion,
Preparation method is simple, at low cost.
Specific implementation mode
Embodiment one：
The present invention is applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid (GEL-B products), and component and weight percent are such as
Under：
Above-mentioned ferrous stability uses the one or more of citric acid, arabo-ascorbic acid, EDTA (ethylenediamine tetra-acetic acid)
Mixture；Surfactant is using fluorocarbon surfactant, the mixture of polyoxyethylene polyoxypropylene octadecyl alcolol ether；Clay is steady
Determine agent and uses cation quaternary ammonium salt；Auxiliary agent is using polyvinyl alcohol, the mixture of low-carbon alcohol ether.
Preparation method is：
Water, auxiliary agent, DOTA derivatives, ferrous stability, clay stabilizer, surfactant are sequentially added
Into round-bottomed flask, it is stirred to react 4h under 50 DEG C of water bath conditions, obtains de-plugging liquid product.
Products application well after so-and-so well of CNOOC, breaking block treatment increases day by day 149 side of liquid, and increase day by day oily 16 sides, tires out so far
Increase oily 4812 sides.
Embodiment two：
The present invention is applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid (GEL-B products), and component and weight percent are such as
Under：
Above-mentioned ferrous stability uses the one or more of citric acid, arabo-ascorbic acid, EDTA (ethylenediamine tetra-acetic acid)
Mixture；Surfactant is using fluorocarbon surfactant, the mixture of polyoxyethylene polyoxypropylene octadecyl alcolol ether；Clay is steady
Determine agent and uses cation quaternary ammonium salt；Auxiliary agent is using polyvinyl alcohol, the mixture of low-carbon alcohol ether.
Preparation method is：
Water, auxiliary agent, DOTA derivatives, ferrous stability, clay stabilizer, surfactant are sequentially added
Into round-bottomed flask, it is stirred to react 4h under 50 DEG C of water bath conditions, obtains de-plugging liquid product.
Products application well after so-and-so well of CNOOC, breaking block treatment increases day by day 52 side of liquid, and increase day by day oily 24 sides, tires out increase so far
Oily 1360 sides.
Embodiment three：
The present invention is applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid (GEL-B products), and component and weight percent are such as
Under：
Above-mentioned ferrous stability uses the one or more of citric acid, arabo-ascorbic acid, EDTA (ethylenediamine tetra-acetic acid)
Mixture；Surfactant is using fluorocarbon surfactant, the mixture of polyoxyethylene polyoxypropylene octadecyl alcolol ether；Clay is steady
Determine agent and uses cation quaternary ammonium salt；Auxiliary agent is using polyvinyl alcohol, the mixture of low-carbon alcohol ether.
Preparation method is：
Water, auxiliary agent, DOTA derivatives, ferrous stability, clay stabilizer, surfactant are sequentially added
Into round-bottomed flask, it is stirred to react 4h under 50 DEG C of water bath conditions, obtains de-plugging liquid product.
The products application 20 side of liquid that increases day by day after so-and-so well of CNOOC, breaking block treatment, increase day by day oily 22 sides, tires out increase oil so far
2419 sides.
Example IV：
The present invention is applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid (GEL-B products), and component and weight percent are such as
Under：
Above-mentioned ferrous stability uses the one or more of citric acid, arabo-ascorbic acid, EDTA (ethylenediamine tetra-acetic acid)
Mixture；Surfactant is using fluorocarbon surfactant, the mixture of polyoxyethylene polyoxypropylene octadecyl alcolol ether；Clay is steady
Determine agent and uses cation quaternary ammonium salt；Auxiliary agent is using polyvinyl alcohol, the mixture of low-carbon alcohol ether.
Preparation method is：
Water, auxiliary agent, DOTA derivatives, ferrous stability, clay stabilizer, surfactant are sequentially added
Into round-bottomed flask, it is stirred to react 4h under 50 DEG C of water bath conditions, obtains de-plugging liquid product.
Products application well after so-and-so well of CNOOC, breaking block treatment increases day by day 49.5 side of liquid, and increase day by day oily 22.6 sides, so far
It is tired to increase oily 2100 sides.
Embodiment five：
The present invention is applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid (GEL-A products), and component and weight percent are such as
Under：
Above-mentioned ferrous stability uses the one or more of citric acid, arabo-ascorbic acid, EDTA (ethylenediamine tetra-acetic acid)
Mixture；Surfactant is using fluorocarbon surfactant, the mixture of polyoxyethylene polyoxypropylene octadecyl alcolol ether；Clay is steady
Determine agent and uses cation quaternary ammonium salt；Auxiliary agent is using polyvinyl alcohol, the mixture of low-carbon alcohol ether.
Preparation method is：
Water, auxiliary agent, DOTA derivatives, ferrous stability, clay stabilizer, surfactant are sequentially added
Into round-bottomed flask, it is stirred to react 4h under 50 DEG C of water bath conditions, obtains de-plugging liquid product.
The present invention is applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid (GEL-B products), and component and weight percent are such as
Under：
Above-mentioned ferrous stability adopts the one or more of citric acid, arabo-ascorbic acid, EDTA (ethylenediamine tetra-acetic acid)
Mixture；Surfactant is using fluorocarbon surfactant, the mixture of polyoxyethylene polyoxypropylene octadecyl alcolol ether；Clay is stablized
Agent uses cation quaternary ammonium salt；Auxiliary agent is using polyvinyl alcohol, the mixture of low-carbon alcohol ether.
Preparation method is：
Water, auxiliary agent, DOTA derivatives, ferrous stability, clay stabilizer, surfactant are sequentially added
Into round-bottomed flask, it is stirred to react 4h under 50 DEG C of water bath conditions, obtains de-plugging liquid product.
GEL-A, GEL-B product is jointly used in CNOOC so-and-so well, and the well increases day by day 218 side of liquid after breaking block treatment, day
Increase oily 32.5 sides, tires out increase oily 8100 sides so far.
Construction effect counts：
Attached chelating de-plugging system the performance test results
1, corrosion rate is tested
Take it is dry after bentonite, in every part of chelating blockages relieving fluid for taking 1g to be respectively placed in embodiment one to five, chelate blockages relieving fluid
Volume is 50mL, and reaction temperature is 65 DEG C, reaction time 4h.It is filtered after reaction, is dry to constant weight, weighing remaining bentonite weight
Amount calculates corrosion rate.It the results are shown in Table 1.
1 corrosion rate test result of table
| Corrosion rate (%) | |
| Embodiment one | 22.6 |
| Embodiment two | 22.5 |
| Embodiment three | 23.8 |
| Example IV | 23.5 |
| Embodiment five | 23.8 |
The chelating blockages relieving fluid corrosion clay ability of the present invention is relatively low compared to mud acid, will not cause the excessive corrosion of middle and high infiltration layer,
Rock matrix will not be destroyed, so as to cause formation sand production.
2, corrosion inhibition is tested
According to professional standard SY/T 5405-1996 acidifications with corrosion inhibiter method for testing performance and evaluation index to embodiment
One to five chelating blockages relieving fluid corrosion inhibition is evaluated, and test temperature is 65 DEG C and 90 DEG C.Evaluation result is shown in Table 2.
2 corrosion rate test result of table
The chelating blockages relieving fluid of the present invention is under formation temperature conditions, and corrosion rate is far below professional standard (note：90 DEG C,
15% hydrochloric acid, level-one professional standard are (3-4) g/ (m2.h)；90 DEG C, 7.5% hydrochloric acid+1.5%HF, level-one professional standard is (2-
3)g/(m2.h).Therefore conventional pumps note equipment construction can be used in the system.
3, secondary precipitation control ability is tested
Embodiment one to five is chelated to the aqueous sodium carbonate of the reaction residue weight percent 5% of blockages relieving fluid and landwaste
PH to 7 is adjusted, phenomenon is shown in Table 3.
3 pH of table changes the influence test result to reaction residue
| PH is adjusted to 7 | |
| One raffinate of embodiment | Without precipitation |
| Two raffinate of embodiment | Without precipitation |
| Three raffinate of embodiment | Without precipitation |
| Example IV raffinate | Without precipitation |
| Five raffinate of embodiment | Without precipitation |
The chelating blockages relieving fluid raffinate performance of the present invention is stablized, and pH environment changes, and no secondary precipitation generates, can be for a long time
Closing well reacts in reservoir.
The detailed description that the embodiment of the present invention is carried out above, but the content is only the preferred embodiments of the present invention, and
It is non-that the scope of the present invention is defined, under the premise of not departing from design spirit of the present invention, this field ordinary skill technology people
The various modifications and improvement that member makes technical scheme of the present invention, should all fall into the protection of claims of the present invention determination
In range.
Claims (8)
1. one kind, which being applied to middle and high infiltration sandstone reservoir, chelates blockages relieving fluid, which is characterized in that its component and weight percent are as follows：
Surfactant, the 4-10 of the DOTA derivatives of 18-25 parts by weight, the ferrous stability of 4-10 parts by weight, 5-15 parts by weight
The clay stabilizer of parts by weight, the auxiliary agent of 5-12 parts by weight, remaining is water.
2. the middle and high infiltration sandstone reservoir according to claim 1 that is applied to chelates blockages relieving fluid, which is characterized in that the iron ion
Stabilizer is one or more of mixtures of citric acid, arabo-ascorbic acid, EDTA.
3. the middle and high infiltration sandstone reservoir according to claim 1 that is applied to chelates blockages relieving fluid, which is characterized in that live on the surface
Property agent be fluorocarbon surfactant, polyoxyethylene polyoxypropylene octadecyl alcolol ether mixture.
4. the middle and high infiltration sandstone reservoir according to claim 1 that is applied to chelates blockages relieving fluid, which is characterized in that the clay is steady
It is cation quaternary ammonium salt to determine agent.
5. the middle and high infiltration sandstone reservoir according to claim 1 that is applied to chelates blockages relieving fluid, which is characterized in that the auxiliary agent is
The mixture of polyvinyl alcohol, low-carbon alcohol ether.
6. a kind of preparation method applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid, which is characterized in that it is wanted by the right
Ask described in 1 be applied to middle and high infiltration sandstone reservoir chelate blockages relieving fluid each component ratio, successively be added water, auxiliary agent, DOTA derivatives,
Ferrous stability, clay stabilizer, surfactant, compound after mixing.
7. the preparation method according to claim 6 applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid, which is characterized in that
The preparation temperature is 45-50 DEG C.
8. the preparation method according to claim 6 applied to middle and high infiltration sandstone reservoir chelating blockages relieving fluid, which is characterized in that
The preparation time is 3-4h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810347255.3A CN108373911B (en) | 2018-04-18 | 2018-04-18 | Chelating blocking remover applied to medium-high permeability sandstone reservoir and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810347255.3A CN108373911B (en) | 2018-04-18 | 2018-04-18 | Chelating blocking remover applied to medium-high permeability sandstone reservoir and preparation method thereof |
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| CN108373911A true CN108373911A (en) | 2018-08-07 |
| CN108373911B CN108373911B (en) | 2020-12-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113105880A (en) * | 2021-03-26 | 2021-07-13 | 中海油田服务股份有限公司 | Blockage removal system and application thereof |
| CN113174243A (en) * | 2021-05-07 | 2021-07-27 | 河北峻极化工科技有限公司 | Self-selection flow-dividing blockage removal system for improving interlayer contradiction of sandstone reservoir and application method thereof |
| CN114991738A (en) * | 2021-03-01 | 2022-09-02 | 中国石油天然气股份有限公司 | Sandstone reservoir composite transformation method |
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| CN114991738B (en) * | 2021-03-01 | 2024-03-26 | 中国石油天然气股份有限公司 | Sandstone reservoir composite reconstruction method |
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| CN113174243A (en) * | 2021-05-07 | 2021-07-27 | 河北峻极化工科技有限公司 | Self-selection flow-dividing blockage removal system for improving interlayer contradiction of sandstone reservoir and application method thereof |
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| CN108373911B (en) | 2020-12-01 |
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