CN1831295A - Technology method for deblock of oil field oil-water well using biological acid - Google Patents
Technology method for deblock of oil field oil-water well using biological acid Download PDFInfo
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- CN1831295A CN1831295A CN 200610043485 CN200610043485A CN1831295A CN 1831295 A CN1831295 A CN 1831295A CN 200610043485 CN200610043485 CN 200610043485 CN 200610043485 A CN200610043485 A CN 200610043485A CN 1831295 A CN1831295 A CN 1831295A
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Abstract
The invention is a process method for unblocking water and oil wells in an oil field by biological acid, characterized by mixing biological acid and water as well as assistant into unblocking agent, squeezing the unblocking agent into oil or water well at normal temperature, so that the unblocking agent gradually seeps into strata, the biological acid seeps into throats to enter in micro-scopical holes and are absorbed on the surface layers of cores, where the squeezing radius is 1-15 m, pressure is stabilized for 0-1.5 h, and 4-18 h later, opening the well,and not discharging fluid, thus improving core property, recovering stratum permeability, stopping stains redeposition, reducing oil and water interface tension and raising crude oil recovery.
Description
One, technical field
The present invention relates to carry out in the oil field development a kind of method of plug removal in oil and water well, specifically a kind of process of utilizing bionic acid to carry out the oilfield oil well de-plugging.
Two, background technology
At present in order to improve the ultimate recovery in oil field, under developmently take a lot of well stimulations, wherein to improve the degree of porosity and the permeability of oil reservoir be one of main well stimulation in the acid treatment of oil formation de-plugging, and acidification to dispel block volume increase method is feasible, but different acidification to dispel block technologies have different effects, different defectives is also arranged,, certain effect of increasing production is arranged as fracture acidizing, but it is bigger to the oil well pipe corrosion, reduce the application life of tubing and casing, the stratum has been caused cave in, caused old formation blockage; Pressure break squeeze the sand effect also can, but in quartz sand, have residual fracturing fluid, the time is long easily hardens, cause new obstruction, along with oil recovery pressure reduction increases gradually, crude oil also arrives the shaft bottom to the abrasive band, cause the shaft bottom to stop up, be extracted into ground with oil and cause collection transmission pipe network to stop up and collect the wearing and tearing of transfer device.
Three, summary of the invention
The purpose of this invention is to provide a kind of process of utilizing bionic acid to carry out the oilfield oil well de-plugging, solve the problem that above-mentioned existing yield-increasing technology causes oil layer blocking.
Technical scheme of the present invention realizes in the following manner:
Bionic acid and water and assistant are made into de-plugging agent, clamp-on at normal temperatures in oil well or the well, de-plugging agent infiltrates the stratum gradually, bionic acid infiltrates pore throat, enters microscopic void, is adsorbed on the core top layer, clamp-oning radius is 1-15 rice, voltage stabilizing 0-1.5 hour, drives a well after 4-18 hour, not discharge opeing improves the core performance, recovers in-place permeability, improve the water-wet effect, strengthen anti-swollen steady sand effect, stop dirt to form deposition once more, reduce oil water interfacial tension, improve oil recovery factor.
A, fracture acidizing injure the oil well of serious formation blockage, de-plugging agent percentage quality proportioning is a bionic acid: water: biological enzyme formulation=0.5-10%: 1: 0.5-5%, stir under the normal temperature, clamp-on at normal temperatures in oil well or the well stratum, clamp-on radius 0.5-10 rice, voltage stabilizing 0.5-1 hour, drive a well not discharge opeing after 4-12 hour.
The oil well on b, polymer plugging stratum, de-plugging agent percentage quality proportioning is a bionic acid: water: chlorine dioxide=5-10%: 1: 2%, stir under the normal temperature, clamp-on under the normal temperature in oil well or the well stratum, clamp-on radius 1-15 rice, voltage stabilizing 1-1.5 hour, drive a well not discharge opeing after 4-10 hour.
The well on c, bacterial plugging ground, de-plugging agent percentage quality proportioning is bionic acid: water=5-10%: stir under 1 normal temperature, normal temperature is clamp-oned and is clamp-oned radius 1-5 rice, voltage stabilizing 0.5-1 hour in the well stratum, drives a well not discharge opeing after 5-12 hour.
Bionic acid mass percent prescription is biological acidulant+chitin extract+biological active matter+biological chelating agent+biology enzyme=0-60%+10-40%+0-50%+0-80%+0-60%.
Utilize section's bionic acid that pauses to carry out plug removal in oil and water well compared with the prior art following advantage is arranged:
(1) oil reservoir protection feature is obvious, and acidity is very weak, takes chelation mechanism to handle the mode of inorganic scale to the stratum, does not injure the oil reservoir skeleton, prevents that the effect of formation collapse is remarkable;
(2) anti-swollen effective, in the time of the de-plugging effect, form layer protecting film on the oil reservoir top layer, there is certain inhibition to shake out, prevent the effect of fine migration, continue oil reservoir is produced good protective action;
(3) it is effective to stablize the water sensitivity clay mineral, when recovering stratum permeability, does not have and causes the danger that formation oil is wetting;
(4) little to tubing string and equipment corrosion, suitable with the corrosion rate of clear water and seawater, do not influence gathering system, can directly enter the oil pipe flow process after the de-plugging construction, do not need anti-row, simplify construction sequence;
(5) enter gathering system after, on stream progressively the dilution, do not influence breakdown of emulsion, residual liquid also has certain advantage to breakdown of emulsion;
(6) in pipe-line system, progressively be deposited on the tube wall, form one deck preservative protective film, can produce certain scale inhibition and antisepsis to equipment and tube wall;
(7) this technology can be used when the operation of immobile oil tubing string, and is little to the cable system influence power, and in the process of de-plugging stratum, the incrustation of wash pump has reasonable effect to improving pump efficiency;
(8) medicament deposits at oil reservoir, can prevent that dirt from depositing formation once more in following period of time;
(9) because the measure of taking is the chelation treatment technology, do not produce the secondary injury after the acidifying, prevent that the factor of precipitation of iron ions injury from also being taken into full account;
(10) plugging removal effect is remarkable, and is good in economic efficiency.
Four, description of drawings
No accompanying drawing.
Five, the specific embodiment
For further disclosing technical scheme of the present invention, elaborate below by embodiment:
Process of the present invention is that bionic acid and water and assistant are made into blockages relieving fluid, and agent is at normal temperatures gone in oil well or the well, and bionic acid infiltrates the oil reservoir pore throat, enter microscopic void, be adsorbed on the core top layer, clamp-on radius 0.5-15 rice, voltage stabilizing 0-1.5 hour, drove a well not discharge opeing in 4-12 hour, improve the core performance, recover in-place permeability, improve the water-wet effect, strengthen anti-swollen steady sand effect, stop dirt to form deposition once more, improve oil recovery factor.
Bionic acid is as a kind of water-soluble products; it can make the reservoir rock wettability of the surface transform to the wet direction of water from oil is wet; thereby change the wetting state of reservoir rock; reduce the interfacial tension between an oily rock stratum; make crude oil be easy to strip down from rock surface; the biological acidification agent is a kind of extremely rare metal-chelator simultaneously; when with metal complex; easily form a plurality of chelate rings; formed complex compound all has extremely strong stability in the pH value scope widely; phytic acid during with metal complex, easily forms the unimolecule organic protective film of one deck densification in the metal surface, can stop O effectively
2Deng entering the metal surface, thereby suppress corrosion of metal, after handle on the stratum, pair stratum significant protection performance is arranged.
Use plug removal in oil and water well process of the present invention should select the oil-water well that meets following condition:
1, formation temperature is less than 180 ℃ well.
2, the good and well of formation testing weak effect of oil.
3, the well of this well low yield with layer position offset well high yield.
Different de-plugging wells is selected different de-plugging process methods for use, as:
(1) if the serious oil well of oil reservoir injury adds the 0.5-5% biological enzyme formulation with the bionic acid of 2-10% and the acid solution of water preparation, clamp-oning on the normal temperature in oil well or the well, clamp-oning 5 meters of radiuses, voltage stabilizing 0.5 hour, driving a well after 6 hours, without discharge opeing.
(2) if the oil well of polymer plugging oil reservoir, the acid solution that is mixed with bionic acid and the water of 2-10% adds stable chlorine dioxide, clamp-ons at normal temperatures in oil well or the well, clamp-ons 6 meters of radiuses, voltage stabilizing 1 hour drives a well after 6 hours, without discharge opeing.
(3) if the well of bacterial plugging with the acid solution that bionic acid and the water of 2-10% is mixed with, is clamp-oned in oil well or the well at normal temperatures, clamp-on 6 meters of radiuses, voltage stabilizing 1 hour drives a well after 6 hours, without discharge opeing.
Claims (2)
1, a kind of process of utilizing bionic acid to carry out the oilfield oil well de-plugging, it is characterized in that bionic acid and water and assistant are made into de-plugging agent, clamp-on at normal temperatures in oil well or the well, de-plugging agent infiltrates the stratum gradually, and bionic acid infiltrates pore throat, enters microscopic void, be adsorbed on the core top layer, clamp-oning radius is 1-15 rice, voltage stabilizing 0-1.5 hour, drives a well after 4-18 hour, not discharge opeing, improve the core performance, recover in-place permeability, improve the water-wet effect, strengthen anti-swollen steady sand effect, stop dirt to form deposition once more, reduce oil water interfacial tension, improve oil recovery factor;
A, fracture acidizing injure the oil well of serious formation blockage, de-plugging agent percentage quality proportioning is a bionic acid: water: biological enzyme formulation=0.5-10%: 1: 0.5-5%, stir under the normal temperature, clamp-on at normal temperatures in oil well or the well stratum, clamp-on radius 0.5-10 rice, voltage stabilizing 0.5-1 hour, drive a well not discharge opeing after 4-12 hour;
The oil well on b, polymer plugging stratum, de-plugging agent percentage quality proportioning is a bionic acid: water: chlorine dioxide=5-10%: 1: 2%, stir under the normal temperature, clamp-on under the normal temperature in oil well or the well stratum, clamp-on radius 1-15 rice, voltage stabilizing 1-1.5 hour, drive a well not discharge opeing after 4-10 hour; The well on bacterial plugging ground, de-plugging agent percentage quality proportioning is bionic acid: water=5-10%: stir under 1 normal temperature, normal temperature is clamp-oned and is clamp-oned radius 1-5 rice, voltage stabilizing 0.5-1 hour in the well stratum, drives a well not discharge opeing after 5-12 hour.
2, a kind of bionic acid is characterized in that the mass percent prescription is biological acidulant+chitin extract+biological active matter+biological chelating agent+biology enzyme=0-60%+10-40%+0-50%+0-80%+0-60%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610043485 CN1831295A (en) | 2006-04-05 | 2006-04-05 | Technology method for deblock of oil field oil-water well using biological acid |
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| CN 200610043485 CN1831295A (en) | 2006-04-05 | 2006-04-05 | Technology method for deblock of oil field oil-water well using biological acid |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638981A (en) * | 2009-06-30 | 2010-02-03 | 东营盛世石油科技有限责任公司 | Bio-enzyme fracturing outlet liquid recovering, oil-displacing and de-plugging process |
| CN102373037A (en) * | 2010-08-10 | 2012-03-14 | 中国石油化工集团公司 | Novel biological blockage removing solution for well completion, and production method thereof |
| CN101608110B (en) * | 2009-07-16 | 2012-04-18 | 西安晶达化工有限公司 | Composite blocking remover and use method thereof |
| CN101838620B (en) * | 2009-03-17 | 2012-04-18 | 大连百奥泰科技有限公司 | Bacillus subtilis and alkali-resisting and salt-resisting oil field fracturing enzyme and application thereof |
| CN103396777A (en) * | 2013-07-22 | 2013-11-20 | 郝占元 | Application of chlorine dioxide blocking remover in coal bed modification |
| CN105602540A (en) * | 2016-01-29 | 2016-05-25 | 中国石油天然气股份有限公司 | Method for treating under-injection well of tight oil reservoir |
| CN106147734A (en) * | 2016-07-14 | 2016-11-23 | 东营盛世石油科技有限责任公司 | A kind of green chelating increasing agent and its preparation method and application |
| CN106167698A (en) * | 2016-07-14 | 2016-11-30 | 东营盛世石油科技有限责任公司 | A kind of online fracturing fluid and preparation method thereof |
| CN110894423A (en) * | 2018-09-13 | 2020-03-20 | 中国石油天然气股份有限公司 | Guar gum residue hydrolytic agent and preparation method thereof |
| CN114837636A (en) * | 2022-05-06 | 2022-08-02 | 西安奥德石油工程技术有限责任公司 | Oil-gas field enzyme catalysis in-situ deep acidification liquid and acidification method and device thereof |
| CN115806811A (en) * | 2021-09-13 | 2023-03-17 | 中石化石油工程技术服务有限公司 | Blocking remover for drilling fluid based on biological acid-biological enzyme cross-linked compound microemulsion as well as preparation method and use method of blocking remover |
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2006
- 2006-04-05 CN CN 200610043485 patent/CN1831295A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838620B (en) * | 2009-03-17 | 2012-04-18 | 大连百奥泰科技有限公司 | Bacillus subtilis and alkali-resisting and salt-resisting oil field fracturing enzyme and application thereof |
| CN101638981A (en) * | 2009-06-30 | 2010-02-03 | 东营盛世石油科技有限责任公司 | Bio-enzyme fracturing outlet liquid recovering, oil-displacing and de-plugging process |
| CN101608110B (en) * | 2009-07-16 | 2012-04-18 | 西安晶达化工有限公司 | Composite blocking remover and use method thereof |
| CN102373037A (en) * | 2010-08-10 | 2012-03-14 | 中国石油化工集团公司 | Novel biological blockage removing solution for well completion, and production method thereof |
| CN102373037B (en) * | 2010-08-10 | 2013-11-20 | 中国石油化工集团公司 | Novel biological blockage removing solution for well completion, and production method thereof |
| CN103396777A (en) * | 2013-07-22 | 2013-11-20 | 郝占元 | Application of chlorine dioxide blocking remover in coal bed modification |
| CN105602540A (en) * | 2016-01-29 | 2016-05-25 | 中国石油天然气股份有限公司 | Method for treating under-injection well of tight oil reservoir |
| CN105602540B (en) * | 2016-01-29 | 2018-06-01 | 中国石油天然气股份有限公司 | Method for treating under-injection well of tight oil reservoir |
| CN106167698A (en) * | 2016-07-14 | 2016-11-30 | 东营盛世石油科技有限责任公司 | A kind of online fracturing fluid and preparation method thereof |
| CN106147734A (en) * | 2016-07-14 | 2016-11-23 | 东营盛世石油科技有限责任公司 | A kind of green chelating increasing agent and its preparation method and application |
| CN110894423A (en) * | 2018-09-13 | 2020-03-20 | 中国石油天然气股份有限公司 | Guar gum residue hydrolytic agent and preparation method thereof |
| CN110894423B (en) * | 2018-09-13 | 2022-05-10 | 中国石油天然气股份有限公司 | Guar gum residue hydrolytic agent and preparation method thereof |
| CN115806811A (en) * | 2021-09-13 | 2023-03-17 | 中石化石油工程技术服务有限公司 | Blocking remover for drilling fluid based on biological acid-biological enzyme cross-linked compound microemulsion as well as preparation method and use method of blocking remover |
| CN115806811B (en) * | 2021-09-13 | 2024-03-15 | 中石化石油工程技术服务有限公司 | Blocking remover for drilling fluid based on biological acid-biological enzyme cross-linked composite microemulsion, and preparation method and use method thereof |
| CN114837636A (en) * | 2022-05-06 | 2022-08-02 | 西安奥德石油工程技术有限责任公司 | Oil-gas field enzyme catalysis in-situ deep acidification liquid and acidification method and device thereof |
| CN114837636B (en) * | 2022-05-06 | 2022-12-27 | 西安奥德石油工程技术有限责任公司 | Oil-gas field enzyme catalysis in-situ deep acidification liquid and acidification method and device thereof |
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