CN107011883A - It is a kind of for de-plugging agent of polymer-bearing waste-water water injection well and preparation method and application - Google Patents
It is a kind of for de-plugging agent of polymer-bearing waste-water water injection well and preparation method and application Download PDFInfo
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- CN107011883A CN107011883A CN201710202726.7A CN201710202726A CN107011883A CN 107011883 A CN107011883 A CN 107011883A CN 201710202726 A CN201710202726 A CN 201710202726A CN 107011883 A CN107011883 A CN 107011883A
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- plugging agent
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- plugging
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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
- C09K8/52—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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- 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
Abstract
The present invention relates to a kind of for de-plugging agent of polymer-bearing waste-water water injection well and preparation method and application.By percentage to the quality, the de-plugging agent includes component：Peracetic acid 15.0% 30.0%, hydrofluoric acid 1.0% 3.0%, corrosion inhibiter 1.0% 2.0%, surfactant 0.5% 1.0%, surplus is water.Present invention also offers the preparation method and applications of above-mentioned de-plugging agent.The de-plugging agent of the present invention solves that polymer-bearing waste-water water injection well stopping state is serious, common de-plugging agent can not effectively release the problem of organo-mineral complexing is blocked.It is small to the corrosion of pit shaft and equipment while the de-plugging agent de-plugging of the present invention, it is ensured that production is normally carried out with injection allocation, is improved yield and economic benefit, is reduced and safeguard treatment cost, social benefit significantly, has broad application prospects.
Description
Technical field
The present invention relates to oil field, and in particular to a kind of for de-plugging agent of polymer-bearing waste-water water injection well and preparation method thereof
With application.
Background technology
The progress produced with oil field, the application of polymer flooding is more and more extensive.Especially into the oil of mid-later development phase
Field, common waterflooding extraction has not reached estimated recovery ratio, and water logging, water breakthrough phenomenon occurs, therefore uses polymer flooding
Inexorable trend is had become instead of common waterflooding extraction.
But with the continuous expansion of polymer flooding scale, polymer in injection wells problem is increasingly severe, causes injection well to inject
Pressure is quickly raised, or even close to formation fracture pressure, it is impossible to expected injection allocation plan is completed, intermittent injection can only be used, sternly
Water filling even can not be carried out during weight, crude output is ultimately resulted in and declines to a great extent.
Polymer-bearing waste-water water filling well plugging is different from common water filling well plugging, be on the one hand the reason for containing poly- water filling well plugging by
It is incompatible in outside fluid and formation fluid, forms inorganic scale and result in blockage or because bacterium and its metabolite result in blockage；
On the other hand it is due to that Polymer adsorption delay, polymer and reservoir pore throat size are incompatible or polymer forms the originals such as micelle
The organic plugging caused by.Blocking mechanism complexity is various, be inorganic and it is organically compound block, conventional simple acidifying de-plugging is not
Suitable for such situation, it is existing to solve that scene needs a kind of new and effective de-plugging agent for polymer-bearing waste-water water injection well de-plugging to occur
Field problem.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide a kind of de-plugging agent, the de-plugging agent is directed to containing poly- dirt
The organic and inorganic compounding blockage problem that water water injection well is present, being capable of efficiently de-plugging, drop low injection pressure, it is ensured that injection allocation is produced just
Often carry out.
The present invention also aims to provide the preparation method of above-mentioned de-plugging agent and its application in de-plugging processing at the scene.
To reach above-mentioned purpose, the invention provides a kind of de-plugging agent for polymer-bearing waste-water water injection well, with quality percentage
Than meter, the de-plugging agent is included：
In above-mentioned de-plugging agent, it is preferable that the Peracetic acid is 25%, and hydrofluoric acid is 2%, and corrosion inhibiter is 1.5%, table
Face activating agent is 0.5%.
In above-mentioned de-plugging agent, it is preferable that the corrosion inhibiter used is counted for ZZJ-7 using ZZJ-7 quality as 100%, institute
State ZZJ-7 be 50% Imidazoline Quatemary-ammonium-salt Corrosion Inhibitor (production of Shandong Ai Ke chemical industry water process Co., Ltd), 0.07% it is poly-
Oxygen ethene octyl phenol ether (production of wound Yue Chemical Co., Ltd. of Guang Zhou cities), 0.1% EDTA (the limited public affairs of Shijiazhuang Jack's chemical industry
Department production) and excess water compounding product.Wherein, polyoxethylene octylphenyl phenol ether and EDTA can form cooperative effect so that slow
Losing agent ZZJ-7 reduces the corrosion rate of de-plugging agent.
In above-mentioned de-plugging agent, it is preferable that the surfactant used is surfactant C6L (Jinan gold section chemical industry
Co., Ltd produces) and surfactant A ES (fatty alcohol-ether sodium sulfate, Jinan Jin Ke Chemical Co., Ltd.s production) compounding produce
Thing, the mass ratio of the surfactant C6L and surfactant A ES are (0.5-2):1.
When carrying out the blocking operation of polymer-bearing waste-water water injection well using the de-plugging agent of the present invention, the acidity of Peracetic acid can
Decomposing bacteria and its accompaniment, dissolve all kinds of corrosion products and fouling, at the same the strong oxidizing property of Peracetic acid can clear up it is organic
Micelle, releases the organic plugging in shaft bottom and inorganic blocking in the lump；Surfactant can play complementary infiltration, stripping, take off
Fall effect, further improve plugging removal effect；Corrosion inhibiter reduces corrosion of the de-plugging agent to tubing string and other facilities, it is met scene
Demand.
Shown by Lab-evaluation, de-plugging agent of the invention has good infiltration to clear up and disperse to peel off to organic matter micelle
Effect, also has very strong dissolution to inorganic scale, while bentonite corrosion amount is more than 11000mg/L, corrosion rate is less than
0.076mm/a, complies fully with oil field production technology, with good application effect and application prospect.
Present invention also offers the preparation technology of above-mentioned de-plugging agent, it comprises the following steps：
(1) Peracetic acid, hydrofluoric acid and corrosion inhibiter are weighed to add in reactor, add water stirring, heating, continues to stir, so
After be cooled to room temperature, medicament A is made；
(2) weigh surfactant to add in reactor, add water stirring, heating, add medicament A and water continues to stir, so
After stand, obtain the de-plugging agent for polymer-bearing waste-water water injection well.
In above-mentioned preparation technology, it is preferable that in step (1), reactor is warming up to 40 ± 1 DEG C, continues the time stirred
For 20-25min.
In above-mentioned preparation technology, it is preferable that in step (2), reactor is warming up to 45 ± 1 DEG C, add medicament A and water after
The time of continuous stirring is 25-30min.
In above-mentioned preparation technology, it is preferable that in step (1), speed of agitator is 45 turns/min.
In above-mentioned preparation technology, it is preferable that in step (2), speed of agitator is 45 turns/min after surfactant is added,
It is 60 turns/min to add speed of agitator after medicament A.
According to specific embodiments of the present invention, it is preferable that above-mentioned preparation technology can include step in detail below：
(1) Peracetic acid, hydrofluoric acid, corrosion inhibiter ZZJ-7 are weighed to add in reactor, is added water, with 45 turns/min rotating speed
Stir, reactor is warming up to 40 ± 1 DEG C, stir 20-25min, be cooled to room temperature, medicament A is made；
(2) weigh surfactant C6L to add in reactor, add water stirred with 45 turns/min rotating speed at room temperature,
It is warming up to after 45 ± 1 DEG C and adds medicament A under agitation, adds water and 25-30min is stirred with 60 turns/min rotating speed, then stand, make
It is standby into the efficient blockage removing agent for polymer-bearing waste-water water injection well.
Present invention also offers application of the above-mentioned de-plugging agent in polymer-bearing waste-water water injection well de-plugging., can be with during concrete application
Follow the steps below：De-plugging agent is pumped into pit shaft with pump truck, its whole is then squeezed into stratum with displacement fluid, solved
It is stifled.The concentration of de-plugging agent is preferably controlled to 3000ppm-5000ppm.
The plugging removal effect of de-plugging agent provided by the present invention is good, organo-mineral complexing blocking can be thoroughly released, while to well
Cylinder and other facilities corrode small, and molten dirty speed is big, and corrosion rate is small, is a kind of new height for polymer-bearing waste-water water injection well de-plugging
Imitate de-plugging agent.
Embodiment
Embodiment 1
Present embodiments provide a kind of de-plugging agent for polymer-bearing waste-water water injection well, by percentage to the quality, the de-plugging agent
Including following components：
Above-mentioned surfactant is that mass ratio is 0.5:1 surfactant C6L and surfactant A ES compounding production
Thing.
The de-plugging agent is prepared according to following steps：
(1) 2500kg Peracetic acid, 200kg hydrofluoric acid and 150kg corrosion inhibiter ZZJ-7 is quantitatively weighed to add in reactor,
Add 2m3Water is stirred, and reactor is warming up into 40 DEG C, is stirred 20min with 45 turns/min speed, is cooled to room temperature, is made
Obtain medicament A.
(2) 50kg surfactants are weighed to add in reactor, 2m is added3Water, is stirred with 45 turns/min rotating speed at room temperature
Mix uniform, reactor is warming up to 45 DEG C, add medicament A and 3.1m3With cooling after 60 turns/min speed stirring 30min after water
To room temperature, standing is prepared into the de-plugging agent.
6-AT245 wells require injection allocation 60m3/ d, oil pressure 12.8MPa, real note 40m2/ d, solution blocking layer effective thickness is 15m,
Due to injection allocation requirement can not be met, de-plugging is carried out using the de-plugging agent of embodiment 1, de-plugging agent consumption is 10 tons, and concentration is
5000ppm.After de-plugging, oil well injection pressure is down to 7.5MPa, and 60m has been reached with fluence3/ d, this explanation is using the present embodiment
De-plugging agent can solve the blockage problem of oil well well, it is ensured that production is normally carried out with injection allocation.
Embodiment 2
Present embodiments provide a kind of de-plugging agent for polymer-bearing waste-water water injection well, by percentage to the quality, the de-plugging agent
Including following components：
Above-mentioned surfactant is that mass ratio is 2:1 surfactant C6L and surfactant A ES compounding product.
Preparation process：
(1) 2000kg Peracetic acid, 100kg hydrofluoric acid and 100kg corrosion inhibiter ZZJ-7 is quantitatively weighed to add in reactor,
Add 2m3Water is stirred, and reactor is warming up into 40 DEG C, is stirred 25min with 45 turns/min speed, is cooled to room temperature, is made
Obtain medicament A.
(2) 100kg surfactants are weighed to add in reactor, 2m is added3Water, is stirred with 45 turns/min speed at room temperature
Mix uniform, reactor is warming up to 45 DEG C, add medicament A and 3.7m3With cooling after 60 turns/min speed stirring 25min after water
To room temperature, standing is prepared into the de-plugging agent.
5-AT225 wells require injection allocation 55m3/ d, oil pressure 14.0MPa, real note 32m2/ d, solution blocking layer effective thickness is 16m.
Due to that can not meet injection allocation requirement, the de-plugging agent prepared using embodiment 2 carries out de-plugging, 10 tons of de-plugging agent consumption, and concentration is
3000ppm.After de-plugging, injection pressure is down to 8.0MPa, and 55m has been reached with fluence3/ d, this explanation uses the de-plugging of the present embodiment
Agent can solve the blockage problem of oil well well, it is ensured that production is normally carried out with injection allocation.
The de-plugging performance test of de-plugging agent
The measure of dissolved dirt speed：Measurement 2 ± 0.1g of dirty thing, takes small beaker to be put into dirty thing, adds 40mL de-plugging agents, reaction 4
Hour, then weigh, calculate dissolved dirt speed.And determine corrosion rate：Corrosion rate reference standard SY/T5273-2000 is tested.
Used de-plugging agent is respectively：SJ1 de-plugging agents (production of Jiangxi Si Mo biochemistry corporation,Ltd.s), HRS composite blockage relieving agents (in
Super joint Energy Science Co., Ltd), blocking remover for oil extraction (auxiliary chemicals Co., Ltd in Xinda in Songyuan City) and the present invention implement
De-plugging agent prepared by example 1.
Table 1
| SJ1 de-plugging agents | HRS composite blockage relieving agents | Blocking remover for oil extraction | The de-plugging agent of the present invention | |
| Organic deposition dissolved dirt speed g/min | 0.031 | 0.03 | 0.011 | 0.02 |
| Inorganic scale dissolved dirt speed g/min | 0.02 | 0.002 | 0.023 | 0.019 |
| Corrosion rate mm/a | 0.093 | 0.074 | 0.071 | 0.066 |
Molten dirty speed is the bigger the better, and corrosion rate is the smaller the better, as it can be seen from table 1 Comprehensive Correlation, de-plugging of the invention
Effect is more preferable.
The addition of polyoxethylene octylphenyl phenol ether and EDTA in the corrosion inhibiter of the de-plugging agent of the present invention is to corrosion rate
Influence as shown in table 2 and table 3.
Influence of the addition of the polyoxethylene octylphenyl phenol ether of table 2 to corrosion rate
| Polyoxethylene octylphenyl phenol ether dosage (%) | 0.05 | 0.07 | 0.1 | 0.3 |
| Corrosion rate (mm/a) | 0.67 | 0.41 | 0.097 | 0.612 |
Influence of the EDTA of table 3 addition to corrosion rate
| EDTA dosages (%) | 0.01 | 0.05 | 0.1 | 0.2 |
| Corrosion rate (mm/a) | 0.7 | 0.52 | 0.087 | 0.33 |
From table 2 and table 3 as can be seen that the optimum add amount of polyoxethylene octylphenyl phenol ether is 0.1%, EDTA optimum add amount
For 0.1%.When the dosage of polyoxethylene octylphenyl phenol ether is 0.1%, corrosion rate is 0.097mm/a, and EDTA dosage is
When 0.1%, corrosion rate is 0.087mm/a.And from table 1 it follows that both act on simultaneously when, corrosion rate is
0.066mm/a, so, polyoxethylene octylphenyl phenol ether and EDTA can form cooperative effect so that corrosion inhibiter reduction corrosion speed
Rate.
Claims (10)
1. a kind of de-plugging agent for polymer-bearing waste-water water injection well, it is characterised in that by percentage to the quality, the de-plugging agent is included
Component：
Preferably, the Peracetic acid is 25%, and hydrofluoric acid is 2%, and corrosion inhibiter is 1.5%, and surfactant is 0.5%.
2. de-plugging agent according to claim 1, it is characterised in that the corrosion inhibiter is ZZJ-7, using ZZJ-7 quality as
100% meter, the ZZJ-7 be 50% imidazoline quaternary ammonium salt, 0.1% polyoxethylene octylphenyl phenol ether, 0.1% EDTA and
The compounding product of excess water.
3. de-plugging agent according to claim 1, it is characterised in that the surfactant is surfactant C6L and table
Face activating agent AES compounding product, the mass ratio of the surfactant C6L and surfactant A ES are (0.5-2):1.
4. the preparation technology of the de-plugging agent any one of claim 1-3, its preparation process is as follows：
(1) Peracetic acid, hydrofluoric acid and corrosion inhibiter are weighed to add in reactor, add water stirring, heating, continues to stir, Ran Houleng
But to room temperature, medicament A is made；
(2) weigh surfactant to add in reactor, add water stirring, heating, add medicament A and water continues to stir, Ran Houjing
Put, obtain the de-plugging agent for polymer-bearing waste-water water injection well.
5. preparation technology according to claim 4, it is characterised in that in step (1), reactor is warming up to 40 ± 1 DEG C, after
The time of continuous stirring is 20-25min.
6. preparation technology according to claim 4, it is characterised in that in step (2), reactor is warming up to 45 ± 1 DEG C, plus
Enter medicament A and water continues the time of stirring for 25-30min.
7. preparation technology according to claim 4, it is characterised in that in step (1), speed of agitator is 45 turns/min.
8. preparation technology according to claim 4, it is characterised in that in step (2), stirring turns after surfactant is added
Speed is 45 turns/min, and it is 60 turns/min to add speed of agitator after medicament A.
9. the de-plugging agent for polymer-bearing waste-water water injection well according to any one of claim 1-3 is in polymer-bearing waste-water water injection well
Application in de-plugging；Preferably, the application comprises the following steps：The de-plugging agent is pumped into pit shaft with pump truck, then with top
Its whole is squeezed into stratum for liquid, de-plugging is carried out.
10. application according to claim 9, it is characterised in that the concentration of de-plugging agent is 3000ppm-5000ppm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710202726.7A CN107011883B (en) | 2017-03-30 | 2017-03-30 | Blocking remover for polymer-containing sewage injection well and preparation method and application thereof |
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| CN201710202726.7A CN107011883B (en) | 2017-03-30 | 2017-03-30 | Blocking remover for polymer-containing sewage injection well and preparation method and application thereof |
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| CN107011883B CN107011883B (en) | 2020-02-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564395A (en) * | 2019-09-30 | 2019-12-13 | 新疆准东准盈技术有限责任公司 | preparation method of blocking remover for oil extraction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1014688B (en) * | 1988-12-31 | 1991-11-13 | 吴成义 | Process for preparing nd-fe-b spherical non-crystalline microcrystalline powder |
| US20030200997A1 (en) * | 2002-04-30 | 2003-10-30 | Gill Jasbir S. | Methods of simultaneously cleaning and disinfecting industrial water systems |
| CN101434834A (en) * | 2008-12-08 | 2009-05-20 | 辽河石油勘探局 | Integrative blockage relieving agent for uranium deposit ore bed |
| CN101550333B (en) * | 2009-05-20 | 2011-01-26 | 大庆开发区东油新技术有限公司 | Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding |
| CN102250602A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite acid blockage removing agent for oil well |
| CA2872349A1 (en) * | 2012-04-20 | 2013-10-24 | Bci Chemical Corporation Sdn. Bhd. | Oil recovery from oil sludge with nanoemulsion surfactant |
-
2017
- 2017-03-30 CN CN201710202726.7A patent/CN107011883B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1014688B (en) * | 1988-12-31 | 1991-11-13 | 吴成义 | Process for preparing nd-fe-b spherical non-crystalline microcrystalline powder |
| US20030200997A1 (en) * | 2002-04-30 | 2003-10-30 | Gill Jasbir S. | Methods of simultaneously cleaning and disinfecting industrial water systems |
| CN101434834A (en) * | 2008-12-08 | 2009-05-20 | 辽河石油勘探局 | Integrative blockage relieving agent for uranium deposit ore bed |
| CN101550333B (en) * | 2009-05-20 | 2011-01-26 | 大庆开发区东油新技术有限公司 | Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding |
| CN102250602A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite acid blockage removing agent for oil well |
| CA2872349A1 (en) * | 2012-04-20 | 2013-10-24 | Bci Chemical Corporation Sdn. Bhd. | Oil recovery from oil sludge with nanoemulsion surfactant |
Non-Patent Citations (2)
| Title |
|---|
| 佟乐 等: "采气井防腐研究", 《当代化工》 * |
| 赵福麟: "才油用化学剂的研究进展", 《中国石油大学学报（自然科学版）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564395A (en) * | 2019-09-30 | 2019-12-13 | 新疆准东准盈技术有限责任公司 | preparation method of blocking remover for oil extraction |
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