CN110305642A - A kind of oil/gas well well-repairing work liquid - Google Patents
A kind of oil/gas well well-repairing work liquid Download PDFInfo
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- CN110305642A CN110305642A CN201910755946.1A CN201910755946A CN110305642A CN 110305642 A CN110305642 A CN 110305642A CN 201910755946 A CN201910755946 A CN 201910755946A CN 110305642 A CN110305642 A CN 110305642A
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- Prior art keywords
- oil
- well
- repairing work
- work liquid
- brine
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lubricants (AREA)
Abstract
A kind of presently disclosed oil/gas well well-repairing work liquid, it is made of brine-base fluid, polymer, oil-soluble resin, iminodisuccinic acid sodium salt and thermal sensitivity auxiliary agent, the mass content of each component are as follows: polymer 0.5~1%, oil-soluble resin 0.5~1%, iminodisuccinic acid sodium salt 0.4~0.8%, thermal sensitivity auxiliary agent 0.1~2%, brine-base fluid are surplus.In the present invention, the addition of iminodisuccinic acid sodium salt can prevent the generation of various organic and inorganic precipitatings；The shielding temporarily blocking layer of the organic or inorganic precipitating and the borehole wall that have been formed can be removed；Corrosion reaction can be generated with molten mineral and cement easily sour in reservoir rock, expand seepage channel.In the present invention, the addition of thermal sensitivity auxiliary agent can control the rheological property of working solution by temperature regulation.
Description
Technical field
This application involves technical field of organic chemistry, in particular to a kind of oil/gas well well-repairing work liquid.
Background technique
Oil/gas well, since various factors causes oil/gas well to break down, causes in oil recovery, gas production, water filling, gas injection process
It stops production, stop infusing, affect the normal work of oil/gas well.Workover treatment is exactly by taking artificial measures, to exclude underground failure,
Oil/gas well is set to restore to work normally.It is to improve well yield and recovery ratio, the important measures to extend manufacture cycle, and
Old well potentiality are excavated, mew layer position is found, expands the important means of exploration results.
Workover treatment specifically includes that salvaging, unfreezing, inspection pump, casing repairing, casing sidetracking, sand washing, sand control, wax removal, solution
The techniques such as stifled, perforations adding.
At this stage, workover treatment problem encountered is: the oil-gas field development later period, and stratum energy is insufficient, and bottom pressure is low
In pressure and hydrostatic pressure；Or it is developed through long-term injecting water and to form multiple pressure series of strata；Workover treatment causes reservoir damage, causes yield big
Amplitude reduction；Ensure construction safety, the especially workover treatment of the oil/gas well containing H2S and marine oil gas well；It meets environmental requirements；
Reduce overall cost.
Workover fluid is used working solution during workover treatment.The major function of workover fluid is: repairing oil/gas well is put down
Weigh strata pressure, protection oil-gas Layer.The quality of workover fluid performance is related to the success rate of workover treatment and the injury journey of reservoir
Degree.Therefore, well-repairing work liquid is the key that solve the problems, such as well workover.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of oil/gas well well-repairing work liquid, the present invention is by salt water
Solution and diverting agent composition.Diverting agent can both play the role of exacerbation, and the inside and outside mud that the later period can remove can be also formed on the borehole wall
Cake, to reduce filter loss.Oil-gas Layer is missed suitable for Thief zone or slit formation.
Oil/gas well well-repairing work liquid provided by the present invention, by brine-base fluid, polymer, oil-soluble resin, imino-diacetic
Succinic acid sodium salt and thermal sensitivity auxiliary agent composition, the mass content of each component are as follows: polymer 0.5~1%, oil-soluble resin 0.5
~1%, iminodisuccinic acid sodium salt 0.4~0.8%, thermal sensitivity auxiliary agent 0.1~2%, brine-base fluid are surplus.
Specifically, the brine-base fluid is the mixture of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The mass ratio of the calcium bromide and zinc bromide is 1:1.2~1.
Specifically, the polymer is hydroxyethyl cellulose, the thickening for well-repairing work liquid.
Specifically, the oil-soluble resin is sodium abietate, melamine resin, as oil-soluble bridge blinding bridge blinding
Material realizes the effect of filtrate reducing.
An important inventive point of the invention is the addition of iminodisuccinic acid sodium salt.Iminodisuccinic acid sodium salt
Itself it is not acid, there is extremely strong water solubility, keep solution weakly acidic, the concentration of iminodisuccinic acid sodium salt is higher, acid
It is stronger.Iminodisuccinic acid sodium salt can improve reservoir permeability, improve oil well productivity.Specifically, the imino-diacetic
Succinic acid sodium salt are as follows:
Another important inventive point of the invention is the addition of thermal sensitivity auxiliary agent, and the thermal sensitivity auxiliary agent is by by poly-
Thermo-sensitive dispersing agent made from ethylene oxide monomethyl ether polymeric monomer and Si3N4 powder, deionized water form.The temperature sensitive auxiliary agent has
Dispersion performance is good and the characteristics of can controlling temperature sensitive suspension rheological property by temperature regulation.Therefore, this working solution can be with
Its mobile performance is controlled by regulating and controlling temperature.
Further the present invention provides the preparation methods of the thermal sensitivity auxiliary agent: synthesis Thermo-sensitive polyethylene glycol oxide
Monomethyl ether polymeric monomer；Synthesize Thermo-sensitive dispersing agent；Thermo-sensitive dispersing agent and Si3N4 powder are add to deionized water a pilling
Mill be prepared into suspension to get.
More specifically, described the preparation method comprises the following steps: polyethylene glycol oxide monomethyl ether and triethylamine are added in tetrahydrofuran, drop
Add acryloyl chloride；After reaction, the sediment that reaction generates is filtered out；Washing out the product in filtrate with petroleum ether is Thermo-sensitive
Polyethylene glycol oxide monomethyl ether polymeric monomer.Obtained Thermo-sensitive polyethylene glycol oxide monomethyl ether polymeric monomer and polyethyleneimine are dissolved
In methyl alcohol, reactant,, will be anti-after reaction at 40 DEG C in confined conditions after the processing of freezing-nitrogen-refrigerating cycle
It answers product elder generation rotary evaporation to remove partial solvent, the product of concentration is settled out in petroleum ether, be centrifuged, dry i.e. acquisition Thermo-sensitive
Dispersing agent.Obtained Thermo-sensitive dispersing agent and Si3N4 powder are add to deionized water ball milling together and are prepared into suspension,
To obtain the final product.
The utility model has the advantages that oil-soluble well workover liquid system of the present invention is mainly by brine-base fluid, polymer, oil-soluble tree
Rouge, iminodisuccinic acid sodium salt and thermal sensitivity auxiliary agent composition.Working solution of the present invention is after operation, inside and outside the borehole wall
Bridging material and filter cake can be dissolved by the crude oil or condensate of output in stratum, can also inject diesel oil and lipophilic surfactant
It is dissolved.
In the present invention, the addition of iminodisuccinic acid sodium salt can also prevent the generation of various organic and inorganic precipitatings；
The shielding temporarily blocking layer of the organic or inorganic precipitating and the borehole wall that have been formed can be removed；It can be with molten mineral easily sour in reservoir rock
And cement generates corrosion reaction, expands seepage channel.
In the present invention, the addition of thermal sensitivity auxiliary agent can control the rheological property of working solution by temperature regulation.
In the present invention, using oil-soluble resin as bridging material, the effect of filtrate reducing is realized.Oil-soluble tree used
Rouge, brittleness oil-soluble resin, it is mainly used as bridge plug particle；Plasticity oil-soluble resin can deform under differential pressure, main to make
To fill particle.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction with the embodiment of the present application, originally
Number described in application and percentage refer both to quality.
Embodiment 1
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 0.5%, oil-soluble resin 0.5%, Asia
Amino disuccinic acid sodium salt 0.4%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.
Embodiment 2
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 1%, oil-soluble resin 1%, imino group
Disuccinic acid sodium salt 0.8%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.
Embodiment 3
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 0.5%, oil-soluble resin 0.5%, Asia
Amino disuccinic acid sodium salt 0.8%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.
Embodiment 4
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 1%, oil-soluble resin 1%, imino group
Disuccinic acid sodium salt 0.8%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.
Embodiment 5
The polyethylene glycol oxide monomethyl ether and triethylamine that molecular weight is 500 is added in tetrahydrofuran, in nitrogen protection, temperature is
Acryloyl chloride is slowly added dropwise under the conditions of 0 DEG C；After 30min, temperature is warmed to room temperature, the reaction was continued for 24 hours.After reaction, it filters out
React the sediment generated；Washing out the product in filtrate with petroleum ether is Thermo-sensitive polyethylene glycol oxide monomethyl ether polymeric monomer (PEO
Polymeric monomer).PEO polymeric monomer and polyethyleneimine (PEI, molecular weight 1800) are dissolved in 4mL methanol, reactant is closed
Under the conditions of after the processing of freezing-nitrogen-refrigerating cycle, at 40 DEG C, while being stirred to react 48h, after stopping reaction, will react
Product elder generation rotary evaporation removes partial solvent, and the product of concentration is settled out in petroleum ether, is centrifuged, dries i.e. acquisition Thermo-sensitive point
Powder PEI-g-PEO.By Thermo-sensitive dispersing agent PEI-g-PEO and Si3N4Powder is add to deionized water ball milling together and is prepared into
Suspension.Obtain thermal sensitivity auxiliary agent.
Embodiment 6
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 0.5%, oil-soluble resin 0.5%, Asia
Amino disuccinic acid sodium salt 0.4%, thermal sensitivity auxiliary agent 0.1%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.The thermal sensitivity auxiliary agent is that embodiment 5 is made
The product obtained.
Embodiment 7
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 1%, oil-soluble resin 1%, imino group
Disuccinic acid sodium salt 0.8%, thermal sensitivity auxiliary agent 2%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.The thermal sensitivity auxiliary agent is that embodiment 5 is made
The product obtained.
Embodiment 8
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 1%, oil-soluble resin 0.5%, imido
Base disuccinic acid sodium salt 0.8%, thermal sensitivity auxiliary agent 2%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.The thermal sensitivity auxiliary agent is that embodiment 5 is made
The product obtained.
Embodiment 9
Oil/gas well well-repairing work liquid, the mass content of each component are as follows: polymer 1%, oil-soluble resin 0.5%, imido
Base disuccinic acid sodium salt 0.4%, thermal sensitivity auxiliary agent 0.1%, brine-base fluid are surplus.
The brine-base fluid is the mixture (1:1.2) of calcium bromide and zinc bromide.The concentration of the brine-base fluid is
70~80%.The polymer is hydroxyethyl cellulose.The oil-soluble resin is sodium abietate, melamino-formaldehyde tree
Rouge.The iminodisuccinic acid sodium salt is four sodium of iminodisuccinic acid.The thermal sensitivity auxiliary agent is that embodiment 5 is made
The product obtained.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application.
Claims (8)
1. a kind of oil/gas well well-repairing work liquid, which is characterized in that the oil/gas well well-repairing work liquid is by brine-base fluid, polymerization
Object, oil-soluble resin, iminodisuccinic acid sodium salt and thermal sensitivity auxiliary agent composition, the mass content of each component are as follows: polymer
0.5~1%, oil-soluble resin 0.5~1%, iminodisuccinic acid sodium salt 0.4~0.8%, thermal sensitivity auxiliary agent 0.1~2%,
Brine-base fluid is surplus.
2. oil/gas well well-repairing work liquid according to claim 1, which is characterized in that the brine-base fluid be calcium bromide with
The mixture of zinc bromide.
3. oil/gas well well-repairing work liquid according to claim 1, which is characterized in that the concentration of the brine-base fluid is 70
~80%.
4. oil/gas well well-repairing work liquid according to claim 1, which is characterized in that the polymer is hydroxy ethyl fiber
Element, the thickening for well-repairing work liquid.
5. oil/gas well well-repairing work liquid according to claim 1, which is characterized in that the oil-soluble resin is rosin acid
Sodium, melamine resin, as oil-soluble bridging-off agent.
6. oil/gas well well-repairing work liquid according to claim 1, which is characterized in that the iminodisuccinic acid sodium salt
Are as follows:
7. oil/gas well well-repairing work liquid according to claim 1, which is characterized in that the thermal sensitivity auxiliary agent is by passing through
Thermo-sensitive dispersing agent made from polyethylene glycol oxide monomethyl ether polymeric monomer and Si3N4 powder, deionized water form.
8. oil/gas well well-repairing work liquid according to claim 1, which is characterized in that the thermal sensitivity auxiliary agent passes through as follows
Method obtains: synthesis Thermo-sensitive polyethylene glycol oxide monomethyl ether polymeric monomer；Synthesize Thermo-sensitive dispersing agent；By Thermo-sensitive dispersing agent and
Si3N4 powder be add to deionized water ball milling together be prepared into suspension to get.
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| CN201910755946.1A CN110305642A (en) | 2019-08-15 | 2019-08-15 | A kind of oil/gas well well-repairing work liquid |
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| CN201910755946.1A CN110305642A (en) | 2019-08-15 | 2019-08-15 | A kind of oil/gas well well-repairing work liquid |
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| CN104177622A (en) * | 2014-06-30 | 2014-12-03 | 中南大学 | Temperature-sensitive dispersing agent, temperature-sensitive suspending liquid and application of temperature-sensitive dispersing agent and temperature-sensitive suspending liquid |
| CN108102624A (en) * | 2017-12-14 | 2018-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of neutrality de-plugging inorganic agent and preparation method thereof |
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-
2019
- 2019-08-15 CN CN201910755946.1A patent/CN110305642A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040011990A1 (en) * | 2002-07-19 | 2004-01-22 | Tetra Technologies, Inc. | Thermally insulating fluid |
| CN103814104A (en) * | 2011-08-30 | 2014-05-21 | 斯比凯可芬兰公司 | Alternative ligand formulations for cellulose products |
| CN104177622A (en) * | 2014-06-30 | 2014-12-03 | 中南大学 | Temperature-sensitive dispersing agent, temperature-sensitive suspending liquid and application of temperature-sensitive dispersing agent and temperature-sensitive suspending liquid |
| CN108102624A (en) * | 2017-12-14 | 2018-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of neutrality de-plugging inorganic agent and preparation method thereof |
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Application publication date: 20191008 |