CN107418544A - A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well - Google Patents
A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well Download PDFInfo
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- CN107418544A CN107418544A CN201710433479.1A CN201710433479A CN107418544A CN 107418544 A CN107418544 A CN 107418544A CN 201710433479 A CN201710433479 A CN 201710433479A CN 107418544 A CN107418544 A CN 107418544A
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- well
- profile control
- water injection
- oil fields
- stifled
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000002347 injection Methods 0.000 title claims abstract description 72
- 239000007924 injection Substances 0.000 title claims abstract description 72
- 239000003814 drug Substances 0.000 title claims abstract description 57
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 229940079593 drug Drugs 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 23
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 21
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims abstract description 11
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229960004011 methenamine Drugs 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 231100000957 no side effect Toxicity 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 235000020681 well water Nutrition 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000002349 well water Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000320 mechanical mixture Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Medicinal Preparation (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The present invention relates to a kind of water injection well in oil fields profile control that handles to cause the composite drug and method of stifled well.The invention belongs to offshore oilfield production technique field.A kind of water injection well in oil fields profile control that handles causes the composite drug of stifled well, is characterized in：Processing water injection well in oil fields profile control causes the component of the composite drug of stifled well and its mass percent composition is potassium bichromate 85 95%, acetic acid 3% 5%, methenamine 2 10%.A kind of water injection well in oil fields profile control that handles causes the method for stifled well, use mass percent composition for potassium bichromate 85 95%, acetic acid 3% 5%, methenamine 2 10% composite drug, add water injection mode to carry out handling water injection well in oil fields profile control and cause to block up well.The present invention has component simple, has no side effect, and dissolving is slow, and reaction is gentle, easy to operate, construction safety, the advantages that improving water filling and profile control efficiency.
Description
Technical field
The invention belongs to offshore oilfield production technique field, causes to block up more particularly to one kind processing water injection well in oil fields profile control
The composite drug and method of well.
Background technology
The development ＆ construction and production of offshore oil and gas field are required for substantial amounts of fund input, recoup capital outlay and have obtained as early as possible
Exploiting economy benefit, determine that offshore oilfield must maintain the higher yield of oil well, therefore strengthen some measures of oil well productivity,
Such as water filling engineering technology is at sea in oil field using wide, but this can make the wind that oil well water breakthrough and production fluid moisture content rise
Danger increase；Simultaneously as the anisotropism of oil reservoir, it may appear that " fingering " and " channelling " phenomenon of the water in oil reservoir are, it is necessary to take
Profile control and water plugging measure, it is typically more using chemical water shutoff mode.But, may be due to " water shutoff gel during profile control and water plugging
Component in system " produces higher viscosity with water mixing, enters shaft bottom with the current of water filling, is passing through water injection well sand-proof pipe
During post, because the aperture size of sand control screen is small (the sand control screen aperture of test string is 0.008 inch), and due to
Screen section corrosion produces " iron rust particle " caused by the longer service phase of tubing string, runs into the higher water shutoff gel mixed liquor of viscosity
And causing " choked flow " phenomenon, this phenomenon accumulation regular hour may result in water filling well pressure and climb quickly, produce temporarily stifled feelings
Condition, the Profile Control in Injection Well water blockoff scheme just produced can not be carried out.
General such case Oil Field can be taken " acidifying, injection gel breaker "." iron rust is dissolved using acidifying medicament
The dirty thing of particle+gel mixed liquor " needs just long time closing well immersion, and excessive acid solution may also result in entering for pit shaft
One step is corroded；The broken logical production of glue medicament uses ammonium persulfate medicament, and the plugging removal effect of this kind of medicament is fine, and speed is fast, but persulfuric acid
Ammonium, which meets water, can produce more violent exothermic reaction, bad using process control, the risk of production development accident be present.
The content of the invention
The present invention provides a kind of processing water injection well in oil fields profile control for technical problem present in solution known technology to be caused
The composite drug and method of stifled well.
The present invention provides a kind of temporarily stifled situation occurred due to oil-field flooding profile control process, solves what corrosion product was formed
" iron rust+polymer beads " dirty thing, promotion oil reservoir macropore block, are simple to operate, do not influence gathering system, can help pit shaft
Sand control screen de-plugging simultaneously can part reservoir plugging macropore and the medicament and scheme that increase production.The present invention helps water injection well wellbore sand
In tubing string sand control screen de-plugging and can part reservoir plugging macropore and play assist increase oil recovery factor composite drug.
The features such as offshore oilfield secondary oil recovery feature and working space, construction environment, do not influenceing water injection technology
On the premise of with profile control technology and not injuring reservoir formation, integrate domestic and international profile control and water plugging stimulation work technology and chemistry,
On the basis of mechanical block-relief technology, the composite drug for causing stifled well for solving water injection well in oil fields profile control has been synthesized.The medicament
Main chemical compositions are potassium bichromate, acetic acid and methenamine.
The de-plugging principle of the composite drug is：Long-term underground water-injection and profile control use polymer, in wellbore sand screen
" iron rust particle+gel mixed liquor " dirty thing formed, with the composite drug by " gentle chemical reaction ", by this part dirt thing
" slowly dissolving " is carried out, recovers the normal flux of sun-proof screen casing, reduces water injection pressure, improve the sweep area of water filling.
The neutral composite drug, pH value 7, belong to neutral.Its main component is potassium bichromate, acetic acid and methenamine.
Mainly take chemical reaction mechanism：
2Fe2O3+4K2Cr2O7→4K2FeO4+4Cr2O3+3O2
6CH3COOH+Fe2O3==2Fe (CH3COO)3+3H2O
For Oil Field situation, mode of just being squeezed using injecting interval plug oil pipe is constructed.Concrete scheme is：Pass through
The water injection well of platform, injected in a manner of the adding medicine of slug formula, " medicament --- clear water replacement --- medicament ".
Since CNOOC's sea SZ 36-1 Field field pilot test and application more than a year, adjusted for injection of polymer gel
It is fine to cut the problem of existing underground is local temporarily stifled solution effect, underground equipment is free from side effects, construction technology safety.It is " slow
Byproduct of reaction particle is small caused by slow chemical reaction ", larger plugging action will not be produced to oil reservoir duct, on the contrary
Macropore in oil reservoir is blocked, promotes the effect of Profile Control in Injection Well, further expands the sweep area of water filling.
An object of the present invention, which is to provide one kind, has component simple, has no side effect, and dissolving is slow, and reaction gently, carries
High water filling and profile control efficiency, it is applied widely the features such as processing water injection well in oil fields profile control cause the composite drug of stifled well.
Present invention processing water injection well in oil fields profile control causes the composite drug of stifled well to be adopted the technical scheme that：
A kind of water injection well in oil fields profile control that handles causes the composite drug of stifled well, it is characterized in that：Handle water injection well in oil fields profile control
The component and its mass percent composition for causing the composite drug of stifled well are potassium bichromate 85-95%, acetic acid 3%-5%, Wu Luo
Tropine 2-10%.
Present invention processing water injection well in oil fields profile control causes the composite drug of stifled well to adopt the following technical scheme that：
Described processing water injection well in oil fields profile control causes the composite drug of stifled well, is characterized in：Water injection well in oil fields is handled to adjust
The aqueous solution for causing the composite drug of stifled well for potassium bichromate, acetic acid and methenamine is cutd open, the quality hundred of aqueous solution Chinese medicine compares
Concentration is 0.05-0.5%.
The second object of the present invention, which is to provide one kind, has construction safety, easy to operate, and reaction is gentle, precise control, carries
The processing water injection well in oil fields profile control of the features such as high water filling and profile control efficiency causes the method for stifled well.
Present invention processing water injection well in oil fields profile control causes the method for stifled well to be adopted the technical scheme that：
A kind of water injection well in oil fields profile control that handles causes the method for stifled well, is characterized in：Processing water injection well in oil fields profile control causes
The method of stifled well use the mass percent to form and answered for potassium bichromate 85-95%, acetic acid 3%-5%, methenamine 2-10%
Medicament is closed, adding water injection mode to carry out processing water injection well in oil fields profile control causes stifled well.
Present invention processing water injection well in oil fields profile control causes the method for stifled well to adopt the following technical scheme that：
Described processing water injection well in oil fields profile control causes the method for stifled well, is characterized in：When composite drug adds the water to inject, adopt
Prized with injection device, using plunger pump, composite drug injection aqueous solution mass percent concentration is 0.05-0.5%, injection rate
For 3-10 cubes m/h, the injection cycle is 50-100 hours.
Described processing water injection well in oil fields profile control causes the method for stifled well, is characterized in：When plunger pump injects, using slug
Formula adding medicine mode is injected, and is injected using medicament-clear water replacement-medicament mode.
The present invention has the advantages and positive effects of：
Processing water injection well in oil fields profile control causes the composite drug for blocking up well and method as a result of the brand-new technology of the present invention
Scheme, compared with prior art, the present invention are directed to during offshore oilfield Profile Control in Injection Well water blockoff, due to caused by long-term injecting water
Corrosion product wellbore sand screen is formed with injection gel rubber system it is temporarily stifled, it is general the fact that Oil Field can take it is " sour
Change, injection gel breaker ".Being dissolved " iron rust particle+gel mixed liquor " dirty thing using acidifying medicament needs the just long time to close
Well soaks.But the reaction of these mode shaft bottoms is violent, and the further corruption of pit shaft is also resulted in using the excessive acid solution being acidified
Erosion.To solve the above problems, improving water filling and profile control efficiency, dissolved slowly, instead using " composite drug of water injectivity profile modification de-plugging "
Answer the characteristics of gentle, the de-plugging agent on friendly stratum, can completely avoid chemical reaction acutely caused by stratum injury and can
Process safety accident caused by energy, the security and convenience for making operation are greatly enhanced.
Embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following examples, and describe in detail
It is as follows：
Embodiment 1
A kind of water injection well in oil fields profile control that handles causes the composite drug of stifled well, the component and its mass percent of composite drug
Form as potassium bichromate 85%, acetic acid 5%, methenamine 10%.
Composite drug is uniformly made using mechanical mixture.
Embodiment 2
A kind of water injection well in oil fields profile control that handles causes the method for stifled well, uses mass percent composition as potassium bichromate 85-
95%th, acetic acid 3%-5%, methenamine 2-10% composite drug, water injection mode is added to carry out handling water injection well in oil fields profile control
Cause stifled well.When composite drug adds the water to inject, prized using injection device, use plunger pump, composite drug injection aqueous solution quality
Percent concentration is 0.25%, and injection rate is 5 cubes ms/h, and the injection cycle is 72 hours.
By the water injection well of platform, injected in a manner of the adding medicine of slug formula, " medicament --- clear water replacement --- medicine
Agent ".
The specific implementation process of the present embodiment：
Water injection well in oil fields profile control causes preparation and the field application of the composite drug of stifled well：
Component proportion (by weight)：The percentage by weight that potassium bichromate accounts for composite drug is 85%, and acetic acid accounting is
5%, methenamine accounts for 10%.
Preparation method：Uniformly it is made by formula ratio mechanical mixture
Subjects：In the high water cut oil field of Bohai Sea offshore platform water flood recovery mode.
Testing program：Prized by injection device, using powerful plunger pump, set implantation concentration as 0.25% (dilution
Liquid is the water source well water of platform), injection rate is 5 sides/hour, and the injection cycle is 72 hours.
It the results are shown in Table 1.
Plugging removal effect contrasts before and after the injection of the different time sections of table 1
The present embodiment has described component simple, has no side effect, and dissolving is slow, and reaction is gentle, easy to operate, construction peace
Entirely, the good effect such as water filling and profile control efficiency is improved.
Claims (4)
1. a kind of water injection well in oil fields profile control that handles causes the composite drug of stifled well, it is characterized in that：Processing water injection well in oil fields profile control is led
The component and its mass percent composition for causing the composite drug of stifled well are potassium bichromate 85-95%, acetic acid 3%-5%, Wu Luotuo
Product 2-10%.
2. processing water injection well in oil fields profile control according to claim 1 causes the composite drug of stifled well, it is characterized in that：Processing oil
Field Profile Control in Injection Well causes the aqueous solution that the composite drug of stifled well is potassium bichromate, acetic acid and methenamine, aqueous solution Chinese medicine
The specific concentration of quality hundred be 0.05-0.5%.
3. a kind of water injection well in oil fields profile control that handles causes the method for stifled well, it is characterized in that：Processing water injection well in oil fields profile control causes to block up
The method of well use mass percent composition for potassium bichromate 85-95%, acetic acid 3%-5%, methenamine 2-10% it is compound
Medicament, adding water injection mode to carry out processing water injection well in oil fields profile control causes stifled well.
4. processing water injection well in oil fields profile control according to claim 3 causes the method for stifled well, it is characterized in that：Composite drug adds
When water injects, prized using injection device, using plunger pump, composite drug injection aqueous solution mass percent concentration is 0.05-
0.5%, injection rate is 3-10 cubes m/h, and the injection cycle is 50-100 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710433479.1A CN107418544A (en) | 2017-06-09 | 2017-06-09 | A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710433479.1A CN107418544A (en) | 2017-06-09 | 2017-06-09 | A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well |
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| Publication Number | Publication Date |
|---|---|
| CN107418544A true CN107418544A (en) | 2017-12-01 |
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ID=60429464
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| CN201710433479.1A Pending CN107418544A (en) | 2017-06-09 | 2017-06-09 | A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well |
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| Country | Link |
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| CN (1) | CN107418544A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075176A (en) * | 1993-03-29 | 1993-08-11 | 冶金工业部钢铁研究总院 | Band rust steel surface treatment solution |
| CN102061154A (en) * | 2010-12-21 | 2011-05-18 | 大庆百晟石油科技有限公司 | Nano high-efficiency composite blockage removing liquid |
| CN102618860A (en) * | 2012-04-11 | 2012-08-01 | 浙江海洋学院 | High-efficiency iron rust conversion agent |
| CN104194755A (en) * | 2014-08-06 | 2014-12-10 | 党庆功 | Superstrong pincerlike scale dissolving liquid |
| CN104419393A (en) * | 2013-08-30 | 2015-03-18 | 周俊 | Composite blockage removing fluid |
| CN105985759A (en) * | 2015-02-11 | 2016-10-05 | 中国海洋石油总公司 | Composite blocking remover for oil well and preparation method thereof |
-
2017
- 2017-06-09 CN CN201710433479.1A patent/CN107418544A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075176A (en) * | 1993-03-29 | 1993-08-11 | 冶金工业部钢铁研究总院 | Band rust steel surface treatment solution |
| CN102061154A (en) * | 2010-12-21 | 2011-05-18 | 大庆百晟石油科技有限公司 | Nano high-efficiency composite blockage removing liquid |
| CN102618860A (en) * | 2012-04-11 | 2012-08-01 | 浙江海洋学院 | High-efficiency iron rust conversion agent |
| CN104419393A (en) * | 2013-08-30 | 2015-03-18 | 周俊 | Composite blockage removing fluid |
| CN104194755A (en) * | 2014-08-06 | 2014-12-10 | 党庆功 | Superstrong pincerlike scale dissolving liquid |
| CN105985759A (en) * | 2015-02-11 | 2016-10-05 | 中国海洋石油总公司 | Composite blocking remover for oil well and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘耀华: "《有机化学中的选择性氧化作用》", 30 June 2008 * |
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Application publication date: 20171201 |