CN103436243A - Safe blocking remover polymer injection well of oil field - Google Patents
Safe blocking remover polymer injection well of oil field Download PDFInfo
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- CN103436243A CN103436243A CN2013103395022A CN201310339502A CN103436243A CN 103436243 A CN103436243 A CN 103436243A CN 2013103395022 A CN2013103395022 A CN 2013103395022A CN 201310339502 A CN201310339502 A CN 201310339502A CN 103436243 A CN103436243 A CN 103436243A
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- blocking
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- energization
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Abstract
The invention relates to a blocking remover, in particular to a safe blocking remover for a polymer injection well of an oil field. The safe blocking remover for the polymer injection well of the oil field efficiently and safely removes blocking of the polymer injection well. The blocking remover comprises the following ingredients by volume percentage: A, 1.0-5.0% of diradical curing cracking agent, B, 3.0-6.0% of dispersing agent, and C, 1.0-5.0% of self-gas generation foaming energization diffusant. With the adoption of the scheme, the remover can efficiently and safely dissolve the blocking caused by polymers in the oil field, is high in blocking removal efficiency, can thoroughly remove the blocking caused by the polymers, overcomes the hidden danger of unstability of the common blocking remover, has a sterilization function, can improve water quality and prevent re-formation of the blocking, improves in-place permeability, flowability of crude oil and recovery efficiency of the crude oil, increases a water injection rate of the well, is simple in configuration and convenient to use, shortens the construction time and lowers the construction cost.
Description
Technical field
The present invention relates to a kind of unblocking agent, the safe unblocking agent of especially a kind of oilfield injection well.
Background technology
At present, large-area polymer flooding is carried out in oil field, and in application, when obtaining effect of increasing production, a lot of Injection Wells occur injecting the problems such as difficulty, displacement weak effect, are strictly restricting the application of polymer technology, make production capacity can not get effective performance.At present the oil field at home great majority in, rear development stage, annotating poly-is the increasing yield and injection technology that current nearly all oil field all adopts, the blockage problem of injection well is increasingly sharpened.Traditional unblocking agent and de-plugging measure effect are not good, and cause unsafe hidden danger to oil field.
Summary of the invention
Purpose of the present invention is exactly the defect existed for prior art, and a kind of safe unblocking agent of oilfield injection well of releasing polymer in injection wells of highly effective and safe is provided.Its technical scheme is: the safe unblocking agent of oilfield injection well, component by following volume percent forms: the A double-basis is solidified cracking agent 1.0%---5.0%, B dispersion agent 3.0%---6.0%, C self generating gas foaming energization diffusant 1.0%---5.0%, wherein double-basis is solidified cracking agent by the H chemical substance and complex compound is composite forms, described this kind of H chemical substance refers to after decomposition the chemical substance that can produce oxyradical, described these H chemical substances comprise calcium peroxide, Potassium Persulphate, complex compound comprises diphenyl thiourea, ethylenediamine tetraacetic acid (EDTA).Double-basis is solidified the synthetic product that cracking agent is at least one at least one and above-described complex compound in above-described H chemical substance.Described dispersion agent is triethyl hexyl phosphoric acid, methyl amyl alcohol, and wherein a kind of of polyacrylamide, described self generating gas foaming energization diffusant adopts the aqueous solution composite of Sodium Nitrite and ammonium chloride.The Sodium Nitrite that self generating gas foaming energization diffusant adopts and the aqueous solution of ammonium chloride, configuration concentration is mass percent 1%.Adopt such scheme, but the obstruction that the dissolving field polymers of highly effective and safe causes, de-plugging efficiency is high, and the obstruction that polymkeric substance is caused can thoroughly be removed, and has overcome the hidden danger of unblocking agent insecurity commonly used; And there is sterilization, and improve water quality and stop the formation again of stopping up, increase zone permeability, improve crude oil fluidity, increased the recovery ratio of crude oil and the water injection rate of well; Configure simply, easy to use, shorten the engineering time, reduce construction cost; Little to the injury of stratum, equipment, de-plugging is thorough.Injection well unblocking agent acidulous material of the present invention, have stronger corrosion ability for the obstruction of injection well, corrosion-free to metal pipe line when corrosion and decomposing copolymer.The present invention is harmless to stratum, and chemical reaction is not occurred high-level cement to.Polymer in injection wells after the present invention processes can be removed fully, and polymkeric substance thoroughly can be decomposed, in order to prevent the obstruction again of polymkeric substance, effectively stop the obstruction again of polymkeric substance on surface, slow down the formation again of organic and inorganic tamper, the use of this unblocking agent can make the wetting angle on formation rock surface overturn, and is that original wetting ability is changed into lipophilicity, polymer plugging is played to the effect of prevention.The wetting angle on formation rock surface is overturn, and makes original wetting ability change into lipophilicity, polymer in injection wells is played to the effect of prevention.
Embodiment
Embodiment 1,
The safe unblocking agent of oilfield injection well is characterized in that: the component by following volume percent forms:
The A double-basis is solidified cracking agent 1.0%------5.0%
B dispersion agent 3.0%------6.0%
C self generating gas foaming energization diffusant 1.0%------5.0%
Wherein double-basis is solidified cracking agent by the H chemical substance and complex compound is composite forms, described this kind of H chemical substance refers to after decomposition the chemical substance that can produce oxyradical, described these H chemical substances comprise calcium peroxide, Potassium Persulphate, complex compound comprises diphenyl thiourea, ethylenediamine tetraacetic acid (EDTA).Double-basis is solidified the synthetic product that cracking agent is at least one at least one and above-described complex compound in above-described H chemical substance.Described dispersion agent is triethyl hexyl phosphoric acid, methyl amyl alcohol, and wherein a kind of of polyacrylamide, described self generating gas foaming energization diffusant adopts the aqueous solution composite of Sodium Nitrite and ammonium chloride.The Sodium Nitrite that self generating gas foaming energization diffusant adopts and the aqueous solution of ammonium chloride, configuration concentration is mass percent 1%.
Embodiment 2,
The safe unblocking agent of oilfield injection well, solidifying cracking agent 1.0%, dispersion agent 3.0%, self generating gas foaming energization diffusant 1.0% and other compositions by double-basis is that water forms:
Wherein double-basis is solidified cracking agent by the H chemical substance and complex compound is composite forms, and described these H chemical substances are calcium peroxide, and complex compound is diphenyl thiourea.It is the synthetic product by calcium peroxide and diphenyl thiourea that double-basis is solidified cracking agent.Described dispersion agent is triethyl hexyl phosphoric acid, and described self generating gas foaming energization diffusant adopts the aqueous solution composite of Sodium Nitrite and ammonium chloride.The Sodium Nitrite that self generating gas foaming energization diffusant adopts and the aqueous solution of ammonium chloride, configuration concentration is mass percent 1%.Stir and get final product after the medicament of above-mentioned each component and water are miscible at normal temperatures.
Embodiment 3
The safe unblocking agent of oilfield injection well, solidify cracking agent 3.0%, dispersion agent 4.5%, mud acid 0.2%, inhibiter 2.25%, anti-clayswelling agent 2.0% by double-basis, and other compositions are that water forms:
Wherein double-basis is solidified cracking agent by the H chemical substance and complex compound is composite forms, and described these H chemical substances are Potassium Persulphate, and complex compound is ethylenediamine tetraacetic acid (EDTA).It is the synthetic product by Potassium Persulphate and ethylenediamine tetraacetic acid (EDTA) that double-basis is solidified cracking agent.Described dispersion agent is methyl amyl alcohol, and described self generating gas foaming energization diffusant adopts the aqueous solution composite of Sodium Nitrite and ammonium chloride.The Sodium Nitrite that self generating gas foaming energization diffusant adopts and the aqueous solution of ammonium chloride, configuration concentration is mass percent 1%.Stir and get final product after the medicament of above-mentioned each component and water are miscible at normal temperatures.
Embodiment 4,
The safe unblocking agent of oilfield injection well, solidify cracking agent 5.0%, dispersion agent 6.0%, mud acid 0.3%, inhibiter 3.0%, anti-clayswelling agent 3.0% by double-basis, and other compositions are that water forms:
Wherein double-basis is solidified cracking agent by the H chemical substance and complex compound is composite forms, and described these H chemical substances are calcium peroxide and Potassium Persulphate, and complex compound is ethylenediamine tetraacetic acid (EDTA).It is the synthetic product by Potassium Persulphate, calcium peroxide and ethylenediamine tetraacetic acid (EDTA) that double-basis is solidified cracking agent.Described dispersion agent is polyacrylamide, and described self generating gas foaming energization diffusant adopts the aqueous solution composite of Sodium Nitrite and ammonium chloride.The Sodium Nitrite that self generating gas foaming energization diffusant adopts and the aqueous solution of ammonium chloride, configuration concentration is mass percent 1%.Stir and get final product after the medicament of above-mentioned each component and water are miscible at normal temperatures, the medicament of above-mentioned each component and water both after mixing at normal temperatures, stir can, by after the shower nozzle connected pipes, sending into shaft bottom, inject unblocking agent, remove the obstruction at borehole place, can shorten the engineering time fast.Specifically with reference to following table:
Claims (2)
1. the safe unblocking agent of oilfield injection well, it is characterized in that: the component by following volume percent forms:
The A double-basis is solidified cracking agent 1.0%------5.0%
B dispersion agent 3.0%------6.0%
C self generating gas foaming energization diffusant 1.0%------5.0%
Wherein double-basis is solidified cracking agent by the H chemical substance and complex compound is composite forms, described this kind of H chemical substance refers to after decomposition the chemical substance that can produce oxyradical, described these H chemical substances comprise calcium peroxide, Potassium Persulphate, complex compound comprises diphenyl thiourea, ethylenediamine tetraacetic acid (EDTA).Double-basis is solidified the synthetic product that cracking agent is at least one at least one and above-described complex compound in above-described H chemical substance.Described dispersion agent is triethyl hexyl phosphoric acid, methyl amyl alcohol, and wherein a kind of of polyacrylamide, described self generating gas foaming energization diffusant adopts the aqueous solution composite of Sodium Nitrite and ammonium chloride.
2. according to the safe unblocking agent of the described oilfield injection well of claim, it is characterized in that: the Sodium Nitrite that self generating gas foaming energization diffusant adopts and the aqueous solution of ammonium chloride, configuration concentration is mass percent 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013103395022A CN103436243A (en) | 2013-08-06 | 2013-08-06 | Safe blocking remover polymer injection well of oil field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103395022A CN103436243A (en) | 2013-08-06 | 2013-08-06 | Safe blocking remover polymer injection well of oil field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634915A (en) * | 2016-12-30 | 2017-05-10 | 西南石油大学 | Thickened oil well polymer plugging remover |
| CN113462371A (en) * | 2021-08-11 | 2021-10-01 | 北京国海能源技术研究院 | Hot acid drainage-assisted deblocking agent for low-pressure shallow oil well and application method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193331A (en) * | 2013-04-18 | 2013-07-10 | 陕西驭腾实业有限公司 | Antisludging agent for low temperature flue gas heat exchange equipment of boiler and preparation method thereof |
-
2013
- 2013-08-06 CN CN2013103395022A patent/CN103436243A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193331A (en) * | 2013-04-18 | 2013-07-10 | 陕西驭腾实业有限公司 | Antisludging agent for low temperature flue gas heat exchange equipment of boiler and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 范振忠等: "注聚井解堵剂的研究与应用", 《科学技术与工程》, vol. 10, no. 01, 31 January 2010 (2010-01-31) * |
| 迟世永: "注聚井解堵剂的研究与应用", 《大庆石油学院工程硕士专业学位论文》, 31 December 2008 (2008-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634915A (en) * | 2016-12-30 | 2017-05-10 | 西南石油大学 | Thickened oil well polymer plugging remover |
| CN113462371A (en) * | 2021-08-11 | 2021-10-01 | 北京国海能源技术研究院 | Hot acid drainage-assisted deblocking agent for low-pressure shallow oil well and application method thereof |
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Application publication date: 20131211 |