CN102061154B - Nano high-efficiency composite blockage removing liquid - Google Patents
Nano high-efficiency composite blockage removing liquid Download PDFInfo
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- CN102061154B CN102061154B CN 201010597533 CN201010597533A CN102061154B CN 102061154 B CN102061154 B CN 102061154B CN 201010597533 CN201010597533 CN 201010597533 CN 201010597533 A CN201010597533 A CN 201010597533A CN 102061154 B CN102061154 B CN 102061154B
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Abstract
The invention belongs to fine chemical liquid, and particularly relates to nano high-efficiency composite blockage removing liquid which is a blockage removing polymer used in oil fields for improving crude oil recovery rate. The formula of the nano high-efficiency composite blockage removing liquid comprises the following components in percentage by weight: 8%-10% of sodium hypophosphite, 0.8%-1% of organic phosphorus-aggregating host acid, 1.5%-2% of potassium persulfate, 4%-5% of blue 826 synergist, 7%-8% of potassium bichromate, 9%-10% of sodium molybdate, 10%-12% of iron ion stabilizer, and the balance of water. Compared with traditional common chemical blockage removing technologies, such as acidification technology and the like, the composite blockage removing liquid not only can effectively improve a blockage-removing effect, keep long smooth time and improve crude oil recovery rate, but also is a novel environmentally-friendly product, which has pH value of 7, is free of pungent odor and corrosion and does not damage strata.
Description
Technical field
The fine chemicals system of the invention belongs to liquid particularly is used for oil field de-plugging polymkeric substance, improves a kind of efficient nano composite blockage relieving liquid of oil recovery factor.
Background technology
The oil field is in the Development and Production process, and each item technological processs such as drilling well, oil-gas mining have all adopted a large amount of chemical, mainly contains mineral substance, natural materials, organism, inorganics, macromolecular material etc.Along with the injection of chemical, because many factor affecting in oil bearing formation property and the performance history, obstruction in various degree can appear in nearly well hydrocarbon zone.Oil-well strata has depositions such as a large amount of bacterium generations, superpolymer; Cause formation pore to stop up, cause injecting the well fluid injection and press liter, IR descends; So that be difficult to inject; Cause the producing well oil offtake to descend, the tamper of oil reservoir needs effectively to remove usually, to improve the output of oil and Sweet natural gas.
Situation variation is year by year totally injected along with the increase of polymkeric substance accumulative total IR in general oil field, and the injection pressure that quite a few well arranged near or reach the parting pressure of oil reservoir.Because injection pressure raises, cause the compelled downward modulation of injection speed, had a strong impact on to gather and driven development effectiveness.For addressing the above problem, promoted common waterfrac treatment and acidification to dispel block measure at the scene in recent years, though alleviate the contradiction that the polymkeric substance notes are not entered and injection pressure rises to a certain extent, but still have the problem that the augmented injection amount is low, validity period is short.
Summary of the invention
Technical problem to be solved by this invention is to the deficiency in the chemical plugging removal technology such as existing common acidifying technology, and a kind of efficient nano composite blockage relieving liquid is provided; It can not only effectively improve plugging removal effect, keeps the unimpeded time long, improves oil recovery factor; And be that pH value is 7; Non-stimulated smell does not have corrosion, can not injure the novel environment friendly product on stratum.
To achieve these goals, the present invention adopts following technical scheme:
A kind of efficient nano composite blockage relieving liquid, form by following components in weight percentage:
Inferior sodium phosphate: 8%--10%, organic phosphorus carboxylic acid: 0.8%--1%, Potassium Persulphate: 1.5%--2%, blue 826 synergistic agent of gathering: 4%--5%, SRM 935a: 7%--8%, Sodium orthomolybdate: 9%--10%, Fe stabilizer: 10%--12%, all the other are water.
The mechanism of a kind of efficient nano composite blockage relieving of the present invention liquid is following:
Efficient nano composite blockage relieving liquid is to be grouped into by inferior sodium phosphate, organic multiple one-tenth such as phosphorus carboxylic acid, Potassium Persulphate, blue 826 synergistic agent, SRM 935a, Sodium orthomolybdate, Fe stabilizer, water that gather.It all has the degraded resolving power to the row's of returning thing that organic agglomerates such as various bacterial micro-organisms, organic high molecular polymer, inorganic tamper (mud, sand, clay) and paraffin, pitch, viscous crude, injection well take out; The chemical conversion reaction takes place in the polymeric micellar that tamper that causes with polymkeric substance in the stratum such as high-viscosity polymer absorption, slaking are bad etc., and promptly the big side chain of oxidative degradation polymkeric substance HV changes into little side chain; Through 16 hours; The polymer plugging Degradation and Transformation becomes aquation small molecules and colloidal dispersion microgel, breaks away from rock surface gradually, makes to inject the dissolving of liquid generation viscosity tamper; Produce and flow; Can be taken away in the lump with fluid, thereby dredged the duct, immediate vicinity of wellbore, to reach the effect of integrative blockage relieving augmented injection preferably.Anti-row's thing that efficient nano composite blockage relieving liquid of the present invention and injection well take out is oxidation test repeatedly, makes blockages relieving fluid discharge the atomic oxygen of free product attitude to oil reservoir contact polymeric liquid micelle, oxygen itself be that very strong electronegativity is arranged.Nitrogen-atoms in the atomic oxygen strong absorption glue chain thing and Wasserstoffatoms charge generation are forged the chain effect, make immobilising micelle be degraded into small molecules, and the viscosity of destroying it makes the fluid smoothness without hindrance, to reach the purpose of de-plugging, also is the principle of opening different locks with different keys.The present invention has combined nano material technology in addition; The augmented injection mechanism of nano material is that itself and hydrophilic sandstone particle surface produce physisorption, changes the wettability of sandstone surface, improves water phase permeability; Thereby reduce the resistance to flow of injecting water, play step-down augmented injection effect.
A kind of efficient nano composite blockage relieving of the present invention liquid reaches 99.6% through simulation test proof degradation rate; To compare effect remarkable with other de-plugging product; Not only can degrade fully to the immobility micelle that oil reservoir and pit shaft produced; And keep the unimpeded time long, be prone to contact with other material of oil reservoir.The even de-plugging of adaptation level section, oil-sand separate can not cause other formation damage, environmental protection, energy-conservation, safe, easy and simple to handle soon.Become neutral behind this blockages relieving fluid and the polymer liquid precursor reactant, pH value is 7, and is tasteless, do not have corrosion, is orange liquid.
In order to verify the result of use of nano combined blockages relieving fluid; According to problem such as stopping up again because of the absorption again of polymkeric substance after the composition analysis of injection well immediate vicinity of wellbore tamper and the injection well de-plugging; We have carried out research trial repeatedly, and table 1 is the experiment situation of simulated field:
The trial sheet of table 1 simulated field
In the table 1: experiment I adopts polymer mother liquor; Experiment II adopts near polymeric micellar;
Experiment III adopts polymeric micellar.All reached identical plugging removal effect.
The simulation test repeatedly that reached 2 years through the contriver; The efficient nano composite blockage relieving liquid formula of development both can be degraded to crosslinked polymer thing the efficient oxidation; Can dissolve fully organic matter, clay and mechanical impurity again, stratum, oil reservoir matrix permeability are obviously improved.Laboratory simulationt test proves that this block releasing technique flexibility is strong, and success ratio is high, is a kind of effective injection well unblocking and injection increasing new technology, also is to surmount the substitute products of acidification to dispel block in the past.
After efficient nano composite blockage relieving liquid of the present invention stirs at normal temperatures; Specify oil reservoir with sending into the shaft bottom behind the high pressure pump truck connection oil pipe of being furnished with high-low pressure medical liquid spraying head; Usage ratio is 1: 15; Like 15 tons of polymeric liquids of available 1 ton of blockages relieving fluid deoxidation, can reach the degraded purpose in 3.5 hours, can improve oil recovery factor fast.
Embodiment
With specific embodiment the present invention is further specified below:
Embodiment 1: the blockages relieving fluid prescription of employing is following: be made up of following components in weight percentage:
Inferior sodium phosphate 8%, organic phosphorus carboxylic acid 0.8%, Potassium Persulphate 1.5%, blue 826 synergistic agent 5%, SRM 935a 7%, Sodium orthomolybdate 9%, Fe stabilizer 10%, water 58.7% of gathering.
Stir after the medicament of above-mentioned each component and water are miscible at normal temperatures and get final product.
This example prescription result of use in oil and water well, with reference to following table 2:
The result of use of table 2. embodiment 1:
Visible from table 2, before and after de-plugging, its pressure, water yield index have fairly obvious difference, prove that this prescription has good plugging removal effect.
Embodiment 2: the prescription of the blockages relieving fluid of employing is following: be made up of following components in weight percentage:
Inferior sodium phosphate 10%, organic phosphorus carboxylic acid 1%, Potassium Persulphate 2%, blue 826 synergistic agent 4%, SRM 935a 8%, Sodium orthomolybdate 10%, Fe stabilizer 12%, water 53% of gathering.Stir after the medicament of above-mentioned each component and water are miscible at normal temperatures and get final product.
Claims (1)
1. efficient nano composite blockage relieving liquid is characterized in that being made up of following components in weight percentage: inferior sodium phosphate: 8%--10%, organic phosphorus carboxylic acid: 0.8%--1%, Potassium Persulphate: 1.5%--2%, blue 826 synergistic agent of gathering: 4%--5%, SRM 935a: 7%--8%, Sodium orthomolybdate: 9%--10%, Fe stabilizer: 10%--12%, all the other are water.
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| CN 201010597533 CN102061154B (en) | 2010-12-21 | 2010-12-21 | Nano high-efficiency composite blockage removing liquid |
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| CN 201010597533 CN102061154B (en) | 2010-12-21 | 2010-12-21 | Nano high-efficiency composite blockage removing liquid |
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| CN102061154A CN102061154A (en) | 2011-05-18 |
| CN102061154B true CN102061154B (en) | 2012-12-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796501A (en) * | 2012-08-16 | 2012-11-28 | 大庆百晟石油科技有限公司 | Ternary composite chain scission solution |
| CN102786920A (en) * | 2012-08-16 | 2012-11-21 | 大庆百晟石油科技有限公司 | Polymerization-removing, depressurizing and injection-enhancing liquid |
| CN103666424B (en) * | 2013-12-04 | 2016-01-13 | 天津大港油田滨港集团博弘石油化工有限公司 | A kind of polymer-degrading agents |
| CN106167696A (en) * | 2016-07-22 | 2016-11-30 | 大庆东宽久久科技有限公司 | The de-plugging of a kind of poly-district increases adopts liquid |
| CN107418544A (en) * | 2017-06-09 | 2017-12-01 | 天津亿利科能源科技发展股份有限公司 | A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well |
Citations (4)
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| CN1415688A (en) * | 2002-10-31 | 2003-05-07 | 大庆油田有限责任公司 | Chemical blocking remover for water injection well in oil field |
| CN1488704A (en) * | 2003-07-31 | 2004-04-14 | 计万军 | Acidifying unblocking liquid for unblocking stratum of water injection well |
| CN1524922A (en) * | 2003-02-25 | 2004-09-01 | 大庆油田有限责任公司 | Acidification blocking remover of sandstone thin difference oil layer compound acid |
| CN1205299C (en) * | 2003-05-21 | 2005-06-08 | 中国海洋石油总公司 | Composite multifunctional chemical unblocking agent |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415688A (en) * | 2002-10-31 | 2003-05-07 | 大庆油田有限责任公司 | Chemical blocking remover for water injection well in oil field |
| CN1524922A (en) * | 2003-02-25 | 2004-09-01 | 大庆油田有限责任公司 | Acidification blocking remover of sandstone thin difference oil layer compound acid |
| CN1205299C (en) * | 2003-05-21 | 2005-06-08 | 中国海洋石油总公司 | Composite multifunctional chemical unblocking agent |
| CN1488704A (en) * | 2003-07-31 | 2004-04-14 | 计万军 | Acidifying unblocking liquid for unblocking stratum of water injection well |
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