CN104419386A - Workover fluid for high-viscosity medium-depth oil wells - Google Patents
Workover fluid for high-viscosity medium-depth oil wells Download PDFInfo
- Publication number
- CN104419386A CN104419386A CN201310398228.6A CN201310398228A CN104419386A CN 104419386 A CN104419386 A CN 104419386A CN 201310398228 A CN201310398228 A CN 201310398228A CN 104419386 A CN104419386 A CN 104419386A
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- China
- Prior art keywords
- workover fluid
- oil
- depth
- oil pipe
- workover
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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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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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)
- Lubricants (AREA)
Abstract
The invention provides a workover fluid for high-viscosity medium-depth oil wells. The workover fluid is prepared from the following components: 0.1%-10% of petroleum sulfonate, 0.2%-1% of potassium chloride, 0.1%-5% of polyquaternary ammonium salt, 1%-2% of aromatic hydrocarbon, 0.1%-5% of polyisobutylene succinimide, 0.01-0.1% of polymethacrylate and the balance of water; all the components are added to a proper amount of water and just stirred evenly, and then can be used. The workover fluid for the high-viscosity medium-depth oil wells is suitable for oil pipe extracting or setting operations of heavy oil wells having the viscosity of crude oil of 10000mpa.s to 15000mpa.s and the well depth of greater than 1000m. The oil pipe extracting or setting operations of the high-viscosity medium-depth oil wells can be performed smoothly and the workover fluid injection pumping pressure can be reduced by more than 70%; the temperature of the workover fluid is reduced, the energy consumption is reduced, the operation speed is high, and one oil pipe can be extracted or set only by about 0.1 minute; the workover fluid can be reused by 8 times; when the effect of the workover fluid becomes poor, the components are properly supplemented and then the initial effect of the workover fluid can be recovered.
Description
Technical field
The present invention relates to the composition technology of International Classification of Patents C09K8/00 for drilling well, dark oil well workover fluid in especially high thickness.
Background technology
For oil well dark in high thickness, existing conventional heat flush technology cannot complete the lower oil tube operation of workover treatment at all, and the viscosity of super-viscous oil reduces flex point generally more than 90 DEG C.
When well depth is more than 800 meters, once viscous crude is full of pit shaft, well workover can not be carried out substantially, can only cause closing well, scrap.
When the well that well depth is less than 800 meters, can injecting steam.But it is general in multilayer position, indivedual heavy oil wells in thin oil block, there is no steam, conventional workover fluid, well control fluid or anti-swollen liquid are heated to more than 100 DEG C by existing oil field 300 type deep fat pump trucks, then be injected in oil well with 700 type pump trucks by oil pipe column, high temperature workover fluid makes viscous crude thinning and discharges, and oil pipe column can slowly propose or RIH.5 ~ 15 minutes consuming time of next root oil pipe, consuming workover fluid is 2 ~ 5 sides.But, for in dark high viscosity heavy oil well, namely viscosity of thickened oil is greater than 10000mpa.s, well depth is when being greater than 1000 meters, propose or under the workover fluid entered needed for oil pipe inject pump pressure and will be greater than inlet device pressure-bearing limit value, dark high viscosity heavy oil well during conventional Heavy Oil well lower oil tube technology cannot be applied to.Patents document discloses less, as:
Chinese patent application 201210528367.1 is based on the constructional method of liquid polymers preparation workover fluid, step one, in Agitation Tank or dosing pond, add water, start agitator or recycle pump, polymkeric substance is added in the water of flowing, working concentration≤30% of polymkeric substance in water, dissolution time is about 2-10min, and viscosity > 10mpa.s after dissolving, can obtain workover fluid after stirring; Step 2, enter truck-mounted blender with the workover fluid of the direct extraction step one of pump, be mixed into propping agent simultaneously, the mass ratio of propping agent and workover fluid and sand, than≤250%, stir 30s mono-2min, pump into stratum after mixing in truck-mounted blender.
Chinese patent application 88108894.3 discloses a kind of oil in water liquid for repairing well; solve oil field pollution problem to oil reservoir in workover operation construction preferably; its main technical schemes is: add in one ton of water: wilkinite 80 ~ 145 kilograms; 34 ~ 36 kilograms, machine oil; Polyanionic Cellulose 2 ~ 4.5 kilograms; 3.4 ~ 3.6 kilograms, washing powder, ground barium sulfate 0-920 kilogram (volume density requires and determines); Its compound method: the ground barium sulfate in proportion after mixing, wilkinite and Polyanionic Cellulose add in pond slowly, after stirring, under agitation add machine oil according to quantity successively again, washing powder, fully after mixing, vigorous stirring more than 20 minutes again under spray gun coordinates.
Summary of the invention
The object of the invention is to propose dark oil well workover fluid in a kind of high thickness, reduce workover fluid and inject pump pressure, to make in high thickness dark oil well proposition or under enter that oil pipe is smooth and easy to carry out fast.
The object of the invention is realized by following technical measures: workover fluid forms component and is: sulfonated petro-leum 0.1% ~ 10%, Repone K 0.2% ~ 1%, polyquaternium 0.1% ~ 5%, aromatic hydrocarbon 1 ~ 2%, polyisobutene succinimide 0.1% ~ 5%, polymethacrylate 0.01 ~ 0.1%, all the other are water; Each component is added in appropriate water, stirs and can use.
Especially, be applicable to viscosity of crude 10000mpa.s ~ 15000mpa.s, well depth be greater than 1000m heavy oil wells propose or under enter oil pipe operation.
Especially, method for implanting is: with 300 type deep fat pump trucks, this workover fluid is heated to 30 DEG C ~ 80 DEG C, then with 700 type pump trucks by wait to propose or under the oil pipe column that enters this workover fluid is injected oil well.
The invention has the beneficial effects as follows: dark oil well in high thickness can be made to propose or under enter that oil pipe is smooth and easy to carry out, workover fluid can be reduced and inject pump pressure more than 70%, not only reduce workover fluid temperature, reduce energy consumption, meanwhile, reduce job safety risk, operating speed is fast, propose or under enter an oil pipe only about 0.1 minute consuming time, this workover fluid is reusable reaches 8 times, and when deleterious, suitable supplemental components can recover initial effect.This patent workover fluid, at viscosity break ratio >=90% of 50 DEG C, anti-clayswelling rate >=90%.
Embodiment
The present invention is applicable to viscosity of crude 10000mpa.s ~ 15000mpa.s, well depth be greater than 1000m heavy oil wells propose or under enter oil pipe operation.
In height thickness of the present invention, dark oil well workover fluid formation component is: sulfonated petro-leum 0.1% ~ 10%, Repone K 0.2% ~ 1%, polyquaternium 0.1% ~ 5%, aromatic hydrocarbon 1 ~ 2%, polyisobutene succinimide 0.1% ~ 5%, polymethacrylate 0.01 ~ 0.1%, all the other are water; Each component is added in appropriate water, stirs and can use.
When the present invention applies, method for implanting is: with 300 type deep fat pump trucks, this workover fluid is heated to 30 DEG C ~ 80 DEG C, then with 700 type pump trucks by wait to propose or under the oil pipe column that enters this workover fluid is injected oil well.Thus make oil pipe viscous crude thinning rapidly and discharge from oil jacket annular space and the annular space between oil pipe and sleeve pipe, well workover machinery can be proposed smoothly rapidly or under enter oil pipe column.
Application of the present invention, dark oil well in high thickness can be made to propose or under enter that oil pipe is smooth and easy to carry out, workover fluid can be reduced and inject pump pressure more than 70%, not only reduce workover fluid temperature, reduce energy consumption, simultaneously, reduce job safety risk, operating speed is fast, propose or under enter an oil pipe only about 0.1 minute consuming time, this workover fluid is reusable reaches 8 times, and when deleterious, suitable supplemental components can recover initial effect.At viscosity break ratio >=90% of 50 DEG C, anti-clayswelling rate >=90%.
Claims (3)
1. dark oil well workover fluid in high thickness, it is characterized in that, workover fluid forms component: sulfonated petro-leum 0.1% ~ 10%, Repone K 0.2% ~ 1%, polyquaternium 0.1% ~ 5%, aromatic hydrocarbon 1 ~ 2%, polyisobutene succinimide 0.1% ~ 5%, polymethacrylate 0.01 ~ 0.1%, all the other are water; Each component is added in appropriate water, stirs and can use.
2. dark oil well workover fluid in high thickness as claimed in claim 1, is characterized in that, be applicable to viscosity of crude 10000mpa.s ~ 15000mpa.s, well depth be greater than 1000m heavy oil wells propose or under enter oil pipe operation.
3. dark oil well workover fluid in high thickness as claimed in claim 1, it is characterized in that, method for implanting is: with 300 type deep fat pump trucks, this workover fluid is heated to 30 DEG C ~ 80 DEG C, then with 700 type pump trucks by wait to propose or under the oil pipe column that enters this workover fluid is injected oil well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310398228.6A CN104419386A (en) | 2013-09-05 | 2013-09-05 | Workover fluid for high-viscosity medium-depth oil wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310398228.6A CN104419386A (en) | 2013-09-05 | 2013-09-05 | Workover fluid for high-viscosity medium-depth oil wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104419386A true CN104419386A (en) | 2015-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310398228.6A Pending CN104419386A (en) | 2013-09-05 | 2013-09-05 | Workover fluid for high-viscosity medium-depth oil wells |
Country Status (1)
| Country | Link |
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| CN (1) | CN104419386A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070060482A1 (en) * | 2005-09-13 | 2007-03-15 | Halliburton Energy Services, Inc. | Methods and compositions for controlling the viscosity of viscoelastic surfactant fluids |
| CN101235279A (en) * | 2007-02-02 | 2008-08-06 | 富顺集团控股有限公司 | Highly effective viscosity-reducing agent for thermodynamic oil extraction process |
| CN101768462A (en) * | 2008-12-31 | 2010-07-07 | 中国石油化工股份有限公司 | Emulsifying and viscosity-decreasing method of thick oil |
| CN102876310A (en) * | 2011-07-14 | 2013-01-16 | 中国石油化工股份有限公司 | Viscous oil emulsification and viscosity reduction agent |
-
2013
- 2013-09-05 CN CN201310398228.6A patent/CN104419386A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070060482A1 (en) * | 2005-09-13 | 2007-03-15 | Halliburton Energy Services, Inc. | Methods and compositions for controlling the viscosity of viscoelastic surfactant fluids |
| CN101235279A (en) * | 2007-02-02 | 2008-08-06 | 富顺集团控股有限公司 | Highly effective viscosity-reducing agent for thermodynamic oil extraction process |
| CN101768462A (en) * | 2008-12-31 | 2010-07-07 | 中国石油化工股份有限公司 | Emulsifying and viscosity-decreasing method of thick oil |
| CN102876310A (en) * | 2011-07-14 | 2013-01-16 | 中国石油化工股份有限公司 | Viscous oil emulsification and viscosity reduction agent |
Non-Patent Citations (1)
| Title |
|---|
| 赵凤兰等: "用于预防和解除有机垢的修井液添加剂", 《钻井液与完井液》 * |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |
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| WD01 | Invention patent application deemed withdrawn after publication |