CN105255466B - Oil well slow de-plugging agent and method for removing blockage - Google Patents
Oil well slow de-plugging agent and method for removing blockage Download PDFInfo
- Publication number
- CN105255466B CN105255466B CN201510713949.0A CN201510713949A CN105255466B CN 105255466 B CN105255466 B CN 105255466B CN 201510713949 A CN201510713949 A CN 201510713949A CN 105255466 B CN105255466 B CN 105255466B
- Authority
- CN
- China
- Prior art keywords
- well
- acid
- plugging
- fluid
- slow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The invention discloses a kind of oil well slow de-plugging agent and method for removing blockage, belong to oilfield exploitation technical field.Slow de-plugging agent is made up of prepad fluid, main body liquid and after pad, prepad fluid, after pad are used as acid solution principal component using hydrochloric acid, to release inorganic scale precipitation and dissolving reaction residual, main body liquid is used as acid solution principal component using glacial acetic acid and fluoboric acid, to stablize Clay Mineral, slow down acid-rock reaction speed, expand plug removal radius, increase de-plugging depth.For fracturing production horizontal well; above-mentioned each section for the treatment of fluid is injected reservoir by three phases after in before point; and with fluid injection nitrogen; can make de-plugging construct after the quick row of returning of reaction residue; adjacent to oil well area contamination and plugging can not only be effectively released, increases nearly well band effective permeability, improves well yield; also it is avoided that sour corrosion excessively damages to reservoir rock skeleton, protection reservoir exempts from secondary injury.
Description
Technical field
The present invention relates to a kind of de-plugging agent, and in particular to for releasing the slow de-plugging agent of adjacent to oil well area blocking, together
When further relate to a kind of de-plugging of well method, belong to oilfield exploitation technical field.
Background technology
In drilling process, drilling fluid occurs to contact for a long time with reservoir can cause different degrees of injury to reservoir, especially
It certainly will have a negative impact for the horizontal well using fracturing production, a large amount of fracturing fluid injection stratum to reservoir, and these are external
Injury of the fluid to reservoir can cause oleic permeability to reduce, and Clay Mineral expands, and fine migration, precipitation occur
Deng, block the effective seepage channel of reservoir, decline well yield.Publication No. CN103740353A patent of invention discloses one kind
Composite blockage relieving agent, including preposition treatment fluid, main process task liquid, active blockages relieving fluid and after pad, preposition treatment fluid by acetic acid, hydrochloric acid,
Hydrofluoric acid, potassium chloride, ammonium persulfate, ethylenediamine tetra-acetic acid, butynediols, APES, propylene glycol monomethyl ether and water
Composition, main process task liquid are made up of acetic acid, hydrochloric acid, hydrofluoric acid, potassium chloride, ammonium persulfate, both sexes fluorocarbon surfactant and water, should
De-plugging agent can release to be blocked as caused by conventional colloid, asphalitine and inorganic solid phase particle, and retardative property is good, moreover it is possible to prevents
Precipitation of iron ions and acid sludge generation, effectively release horizontal well near wellbore zone and block, recover oil well productivity, improve oil recovery factor.
But the corrosivity of hydrochloric acid and hydrofluoric acid is stronger, acid-rock reaction excessive velocities during using the two as acid solution main body, easily to reservoir rock
Skeleton is damaged, and causes secondary injury, while is unfavorable for increasing de-plugging agent depth of interaction, and de-plugging scope is limited.
The content of the invention
It is an object of the invention to provide a kind of de-plugging agent that can effectively slow down acid-rock reaction speed.
Meanwhile the present invention also provides a kind of de-plugging of well method.
In order to realize the above object the technical solution adopted in the present invention is：
The slow de-plugging agent of oil well, by prepad fluid, main body liquid, after pad according to volume ratio 40~55:125~175:40~
55 compositions；Prepad fluid, after pad are made up of the component of following mass percent respectively：Hydrochloric acid 8%, ammonium chloride 0.8~1.2%,
Citric acid 0.4~0.6%, Xie Shui lock agent 0.4~0.6%, corrosion inhibiter 0.4~0.6%, butyl glycol ether 0.4~0.6% are remaining
Measure as water；Main body liquid is made up of the component of following mass percent：Glacial acetic acid 5%, fluoboric acid 3%, ammonium chloride 0.8~1.2%,
Citric acid 0.4~0.6%, Xie Shui lock agent 0.4~0.6%, corrosion inhibiter 0.4~0.6%, butyl glycol ether 0.4~0.6% are remaining
Measure as water.
Preferably, prepad fluid, after pad are made up of the component of following mass percent respectively in slow de-plugging agent：Hydrochloric acid
8%, ammonium chloride 1%, citric acid 0.5%, Xie Shui lock agent 0.5%, corrosion inhibiter 0.5%, butyl glycol ether 0.5%, surplus is water；
Main body liquid is made up of the component of following mass percent：Glacial acetic acid 5%, fluoboric acid 3%, ammonium chloride 1%, citric acid 0.5%, solution
Water locks agent 0.5%, and corrosion inhibiter 0.5%, butyl glycol ether 0.5%, surplus is water.
Xie Shui lock agent is AS-3, and AS-3 is a kind of surfactant, trade name：AS-3 water blocking damage treating agents,
Numbering：1003, the restocking date：On August 10th, 2011, purchased from Dongying City Ao Sheng Chemical Co., Ltd.s.AS-3 can effectively reduce rock
Stone surface tension and oil water interfacial tension, reduce capillary resistance and working fluid returns row pressure power, improve oleic permeability.
The corrosion inhibiter is SJ-21, and SJ-21 is a kind of quaternary ammonium salt, trade name：SJ-21 normal temperature acidification corrosion inhibitors, compile
Number：2005, have an area of Chemical Co., Ltd. purchased from Shengli Oil Field.SJ-21 can effectively prevent de-plugging agent to construction equipment and metal
The corrosion of pipeline.
Component effect is summarized as follows in each section for the treatment of fluid and treatment fluid：
In prepad fluid, hydrochloric acid is mainly used in releasing inorganic scale precipitation, and stratum is pre-processed.
In main body liquid, fluoboric acid can stablize clay and formation fines, destroy clay mineral cation exchange capacity (CEC), will be micro-
Grain links together with rock matrix.And fluoboric acid is a kind of potential acid for producing hydrofluoric acid, can be hydrolyzed in water and produce hydrogen fluorine
Acid.Acetic acid and fluoboric acid are compounded, acid-rock reaction speed can be slowed down, avoid sour corrosion from excessively being caused brokenly to reservoir rock skeleton
It is bad, solve the problems, such as because acid-rock reaction excessive velocities cause EFFECTIVE RANGE to reduce, reach deep while reservoir is protected
The purpose of de-plugging.
In after pad, hydrochloric acid is mainly used in dissolving the reaction residual of preposition de-plugging agent and main body de-plugging agent, thoroughly removes near
Well area blocks.
The present invention is pre-processed with prepad fluid to reservoir to dissolve carbonate cement and part calcium in oil reservoir first
Matter, aluminum etc., avoid main body liquid from producing insoluble matter into reaction after reservoir and cause new blocking；Main body liquid is mainly used in releasing storage
Layer blocks, and improves reservoir permeability；After pad is used to dissolve issuable a small amount of reaction residues etc. after main humoral effect.Each section
The ammonium chloride used, citric acid, AS-3, SJ-21 and the butyl glycol ether single dose of being arranged in pairs or groups in treatment fluid are mutual, and with it is inorganic
Good compatibility is respectively provided between acid, each component is assisted between component can also be played while each self-applying is given full play to after mixing
Same-action, before de-plugging, improve reservoir permeability.
Citric acid is a kind of ferrous stability, can play a part of stable iron ion, and and can plays corrosion rock
Effect, due to citric acid multiple ionization, it can slow down acid-rock reaction speed, increase de-plugging EFFECTIVE RANGE.
Ammonium chloride is a kind of clay stabilizer, for suppressing clay swell.
Butyl glycol ether is a kind of demulsification mutual solvent, has anti-newborn demulsification, it can reduce surfactant in original
The absorption of oil interface, sour interface and rock particles surface, make the liquid pearl in acidization be easy to merge, eliminate emulsification of crude oil thing
Block, recover reservoir rock surface hydrophilicity, improve oleic permeability.
De-plugging of well method, comprises the following steps：Slow de-plugging agent is injected into horizontal well and (is implanted sequentially prepad fluid, master
Body fluid and after pad), with fluid injection nitrogen, closing well after active water replaces, you can.
Preferably, prepad fluid, main body liquid, after pad are injected in a manner of just squeezing, prepad fluid, the injection discharge capacity point of after pad
Wei not 0.5~0.8m3/ min, the injection discharge capacity of main body liquid is 1~1.5m3/ min, the injection discharge capacity of liquid nitrogen is 0.1~0.2m3/
min.In prepad fluid injection stage, using 0.5~0.8m3It is fully pre- to reservoir progress that/min small displacement injection is beneficial to prepad fluid
Processing, and main body liquid injection discharge capacity is more than prepad fluid injection discharge capacity and improves main body liquid injection pressure, increases de-plugging depth.
, it is necessary to first play out flow string in well before injection de-plugging agent, tripping in sand-flushing pipe column carries out sand washing operation, and sand washing is made
Industry plays out sand-flushing pipe column after terminating, tripping in tieback string, after tieback is qualified, install well head, and pressure testing, connection are carried out to oil jacket annular space
Surface line, pressure testing is carried out to well head and surface line, pressure testing is qualified can to inject de-plugging agent.
The time of the closing well is 10~20 hours, and drive a well pressure release after reaction, and (is washed out residual in pit shaft with active water well-flushing
Liquid), underground de-plugging operating tool string is played out after well-flushing.Active water be addition potassium chloride commonly used in the art, ammonium chloride or its
The solution (concentration 1% or so) of his clay stabilizer.
Beneficial effects of the present invention：
Slow de-plugging agent is made up of prepad fluid, main body liquid and after pad in the present invention, and prepad fluid, after pad are made with hydrochloric acid
For acid solution principal component, to release inorganic scale precipitation and dissolving reaction residual, main body liquid is used as acid solution master using acetic acid and fluoboric acid
Composition, to stablize Clay Mineral, slow down acid-rock reaction speed, expand plug removal radius, increase de-plugging depth.For pressure break
Operation horizontal well, before point in after three phases above-mentioned each section for the treatment of fluid is injected into reservoir, and with fluid injection nitrogen, after de-plugging construction can be made
The quick row of returning of reaction residue, can not only effectively release adjacent to oil well area contamination and plugging, increase nearly well band effective permeability, improve
Well yield, moreover it is possible to avoid sour corrosion from excessively being damaged to reservoir rock skeleton, protection reservoir exempts from secondary injury.
For fracturing production horizontal well, addition sand washing process can effectively release physical clogging in pit shaft in de-plugging process,
Divide three phases to inject each section for the treatment of fluid with different displacements again, stepwise disposal, can finally reach and release reservoir blocking, dredging storage
Layer seepage channel, improve the purpose of well yield.Whole companion's fluid injection nitrogen is injected in de-plugging agent, reacts residual after being advantageous to breaking block treatment
The smooth row of returning of liquid.
Embodiment
Following embodiments are only described in further detail to the present invention, but do not form any limitation of the invention.
Embodiment 1
In the present embodiment oil well with slow de-plugging agent by prepad fluid, main body liquid, after pad according to volume 50m3、150m3With
50m3Composition；Prepad fluid, after pad are made up of the component of following mass percent respectively：Hydrochloric acid 8%, ammonium chloride 0.8%, lemon
Acid 0.6%, AS-3 0.4%, SJ-21 0.6%, butyl glycol ether 0.4%, surplus is water；Main body liquid is by following quality percentage
Several component compositions：Glacial acetic acid 5%, fluoboric acid 3%, ammonium chloride 1.2%, citric acid 0.4%, Xie Shui lock agent 0.6%, corrosion inhibiter
0.4%, butyl glycol ether 0.6%, surplus is water.The compound method of each section for the treatment of fluid is identical, i.e., is stirred evenly after each component is mixed
Produce.
De-plugging of well method, comprises the following steps：
1) HH37P15 wells are directed to, first play out flow string in well, tripping in sand-flushing pipe column carries out sand washing operation, sand washing operation
Sand-flushing pipe column is played out after end, tripping in tieback string is incorporated into 1939.56m, after tieback is qualified, 350 type well heads is installed, to oil jacket
Annulus test is less than 0.5MPa to be qualified to 5MPa, pressure drop in 10 minutes, connection surface line, well head and surface line is tried
Pressure, do not pierce Lou and pressure drop in 30 minutes be less than 0.5MPa be it is qualified；
2) in a manner of just squeezing, 0.5m3/ min discharge capacity injection prepad fluid, then with 0.15m3/ min discharge capacity is with fluid injection nitrogen；
3) in a manner of just squeezing, 1.3m3/ min discharge capacity injection main body liquid, then with 0.15m3/ min discharge capacity is with fluid injection nitrogen；
4) in a manner of just squeezing, 0.5m3/ min discharge capacity injection after pad, then with 0.1m3/ min discharge capacity is with fluid injection nitrogen；
5) in a manner of just squeezing, 0.4m3/ min discharge capacity is slowly replaced after pad to reservoir with active water；
6) closing well drives a well pressure release after 15 hours, with active water well-flushing, washes out raffinate in pit shaft, and recur out underground de-plugging construction
Tubing string.Oil well day oil-producing 0.2t/d before breaking block treatment, day oil-producing 2.13t/d after breaking block treatment, increase day by day oily 1.93t/d.
Embodiment 2
In the present embodiment oil well with slow de-plugging agent by prepad fluid, main body liquid, after pad according to volume 42m3、126m3With
42m3Composition；Prepad fluid, after pad are made up of the component of following mass percent respectively：Hydrochloric acid 8%, ammonium chloride 1%, citric acid
0.5%, AS-3 0.5%, SJ-21 0.5%, butyl glycol ether 0.5%, surplus are water；Main body liquid is by following mass percent
Component composition：Glacial acetic acid 5%, fluoboric acid 3%, ammonium chloride 1%, citric acid 0.5%, Xie Shui lock agent 0.5%, corrosion inhibiter
0.5%, butyl glycol ether 0.5%, surplus is water.The compound method of each section for the treatment of fluid is identical, i.e., is stirred evenly after each component is mixed
Produce.
De-plugging of well method, comprises the following steps：
1) HH37P23 wells are directed to, first play out flow string in well, tripping in sand-flushing pipe column carries out sand washing operation, sand washing operation
Sand-flushing pipe column is played out after end, tripping in tieback string is incorporated into 1861.53m, after tieback is qualified, 350 type well heads is installed, to oil jacket
Annulus test is less than 0.5MPa to be qualified to 5MPa, pressure drop in 10 minutes, connection surface line, well head and surface line is tried
Pressure, do not pierce Lou and pressure drop in 30 minutes be less than 0.5MPa be it is qualified；
2) in a manner of just squeezing, 0.5m3/ min discharge capacity injection prepad fluid, then with 0.15m3/ min discharge capacity is with fluid injection nitrogen；
3) in a manner of just squeezing, 1.1m3/ min discharge capacity injection main body liquid, then with 0.15m3/ min discharge capacity is with fluid injection nitrogen；
4) in a manner of just squeezing, 0.5m3/ min discharge capacity injection after pad, then with 0.1m3/ min discharge capacity is with fluid injection nitrogen；
5) in a manner of just squeezing, 0.3m3/ min discharge capacity is slowly replaced after pad to reservoir with active water；
6) closing well drives a well pressure release after 12 hours, with active water well-flushing, washes out raffinate in pit shaft, and recur out underground de-plugging construction
Tubing string.Oil well day oil-producing 0.53t/d before breaking block treatment, day oil-producing 3.04t/d after breaking block treatment, increase day by day oily 2.51t/d.
Embodiment 3
In the present embodiment oil well with slow de-plugging agent by prepad fluid, main body liquid, after pad according to volume 55m3、175m3With
55m3Composition；Prepad fluid is made up of the component of following mass percent：Hydrochloric acid 8%, ammonium chloride 1.2%, citric acid 0.4%, AS-
3 0.6%, SJ-21 0.4%, butyl glycol ether 0.6%, surplus are water；Main body liquid by following mass percent component group
Into：Glacial acetic acid 5%, fluoboric acid 3%, ammonium chloride 1%, citric acid 0.5%, Xie Shui lock agent 0.5%, corrosion inhibiter 0.5%, ethylene glycol
Butyl ether 0.5%, surplus are water；After pad is made up of the component of following mass percent：Hydrochloric acid 8%, ammonium chloride 1%, citric acid
0.5%, AS-30.4%, SJ-210.4%, butyl glycol ether 0.6%, surplus are water.The compound method of each section for the treatment of fluid is identical,
Stir evenly and produce after each component is mixed.
De-plugging of well method, comprises the following steps：
1) HH37P35 wells are directed to, first play out flow string in well, tripping in sand-flushing pipe column carries out sand washing operation, sand washing operation
Sand-flushing pipe column is played out after end, tripping in tieback string is incorporated into 2022.09m, after tieback is qualified, 350 type well heads is installed, to oil jacket
Annulus test is less than 0.5MPa to be qualified to 5MPa, pressure drop in 10 minutes, connection surface line, well head and surface line is tried
Pressure, do not pierce Lou and pressure drop in 30 minutes be less than 0.5MPa be it is qualified；
2) in a manner of just squeezing, 0.7m3/ min discharge capacity injection prepad fluid, then with 0.15m3/ min discharge capacity is with fluid injection nitrogen；
3) in a manner of just squeezing, 1.5m3/ min discharge capacity injection main body liquid, then with 0.15m3/ min discharge capacity is with fluid injection nitrogen；
4) in a manner of just squeezing, 0.7m3/ min discharge capacity injection after pad, then with 0.1m3/ min discharge capacity is with fluid injection nitrogen；
5) in a manner of just squeezing, 0.5m3/ min discharge capacity is slowly replaced after pad to reservoir with active water；
6) closing well drives a well pressure release after 18 hours, with active water well-flushing, washes out raffinate in pit shaft, and recur out underground de-plugging construction
Tubing string.Oil well day oil-producing 0.12t/d before breaking block treatment, day oil-producing 3.85t/d after breaking block treatment, increase day by day oily 3.73t/d.
Hydrochloric acid (31%), ammonium chloride, citric acid, glacial acetic acid (98%), fluoboric acid (30%) etc. in above-described embodiment 1~3
Use industrial rank.
De-plugging benchmark test
Test method：Formation core shown in table 1 below is taken, the slow de-plugging agent prepared using embodiment 2 is carried out at de-plugging
Reason, core permeability changes before and after determining de-plugging, and calculates resume permeability rate, and result of the test see the table below 1.
Core permeability before and after the de-plugging of table 1
Claims (6)
1. the slow de-plugging agent of oil well, it is characterised in that：By prepad fluid, main body liquid, after pad according to volume ratio 40 ~ 55:125~
175:40 ~ 55 compositions；Prepad fluid, after pad are made up of the component of following mass percent respectively：Hydrochloric acid 8%, ammonium chloride 0.8 ~
1.2%, citric acid 0.4 ~ 0.6%, Xie Shui lock agent 0.4 ~ 0.6%, corrosion inhibiter 0.4 ~ 0.6%, butyl glycol ether 0.4 ~ 0.6%, surplus is
Water；Main body liquid is made up of the component of following mass percent：Glacial acetic acid 5%, fluoboric acid 3%, ammonium chloride 0.8 ~ 1.2%, citric acid
0.4 ~ 0.6%, Xie Shui lock agent 0.4 ~ 0.6%, and corrosion inhibiter 0.4 ~ 0.6%, butyl glycol ether 0.4 ~ 0.6%, surplus is water；The Xie Shui
Lock agent is AS-3, corrosion inhibiter SJ-21.
2. slow de-plugging agent according to claim 1, it is characterised in that：Prepad fluid, after pad are respectively by following quality hundred
The component composition of fraction：Hydrochloric acid 8%, ammonium chloride 1%, citric acid 0.5%, Xie Shui lock agent 0.5%, corrosion inhibiter 0.5%, butyl glycol ether
0.5%, surplus is water；Main body liquid is made up of the component of following mass percent：Glacial acetic acid 5%, fluoboric acid 3%, ammonium chloride 1%, lemon
Lemon acid 0.5%, Xie Shui lock agent 0.5%, corrosion inhibiter 0.5%, butyl glycol ether 0.5%, surplus is water.
3. de-plugging of well method, it is characterised in that：Comprise the following steps：It is any in injection such as claim 1 ~ 2 into horizontal well
Slow de-plugging agent described in, with fluid injection nitrogen, closing well after active water replaces, you can.
4. method for removing blockage according to claim 3, it is characterised in that：Prepad fluid, main body liquid, after pad in slow de-plugging agent
Injected in a manner of just squeezing, prepad fluid, the injection discharge capacity of after pad are respectively 0.5 ~ 0.8m3/ min, the injection discharge capacity of main body liquid
For 1 ~ 1.5m3/min。
5. method for removing blockage according to claim 3, it is characterised in that：Before injecting slow de-plugging agent, first rise out in well and produce
Tubing string, tripping in sand-flushing pipe column carry out sand washing operation, and sand washing operation plays out sand-flushing pipe column, tripping in tieback string after terminating.
6. method for removing blockage according to claim 3, it is characterised in that：The time of the closing well is 10 ~ 20 hours, and closing well is anti-
Should after drive a well pressure release, well-flushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713949.0A CN105255466B (en) | 2015-10-28 | 2015-10-28 | Oil well slow de-plugging agent and method for removing blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713949.0A CN105255466B (en) | 2015-10-28 | 2015-10-28 | Oil well slow de-plugging agent and method for removing blockage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105255466A CN105255466A (en) | 2016-01-20 |
| CN105255466B true CN105255466B (en) | 2018-02-13 |
Family
ID=55095406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510713949.0A Active CN105255466B (en) | 2015-10-28 | 2015-10-28 | Oil well slow de-plugging agent and method for removing blockage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105255466B (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105255467B (en) * | 2015-10-28 | 2019-01-08 | 中国石油化工股份有限公司 | A kind of composite blockage relieving agent for tight sandstone reservoir |
| CN106367054B (en) * | 2016-07-29 | 2019-09-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of Xie Shui lock agent and preparation method |
| CN107142095B (en) * | 2017-05-17 | 2020-04-24 | 成都百联油田技术服务有限公司 | Blocking remover and preparation method thereof |
| CN108949132B (en) * | 2017-05-27 | 2021-03-16 | 中国石油化工股份有限公司 | Sand consolidation and blockage removal treatment fluid for sand prevention of fine silt reservoir oil well, sand prevention treatment fluid system and sand prevention method using sand consolidation and blockage removal treatment fluid system |
| CN107987816A (en) * | 2017-11-27 | 2018-05-04 | 延长油田股份有限公司 | A kind of layer dredge method and selective acidizing additive |
| CN108343398B (en) * | 2017-11-27 | 2023-02-28 | 中国石油天然气股份有限公司 | Oil well scale prevention method |
| CN109897618A (en) * | 2017-12-07 | 2019-06-18 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of descaling composition, scale remover and preparation method thereof |
| CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
| CN108822819A (en) * | 2018-06-14 | 2018-11-16 | 兰州凯宏中原石油科技有限公司 | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid |
| CN109181669A (en) * | 2018-10-18 | 2019-01-11 | 陕西新奥石油工程有限公司 | A kind of mating medicament and technique releasing reservoir water lock, blocking |
| CN110630217B (en) * | 2019-09-12 | 2021-11-23 | 西安石油大学 | Chlorine dioxide oil-water well production and injection increasing process for tight oil reservoir |
| CN113494271A (en) * | 2020-03-18 | 2021-10-12 | 中国石油天然气股份有限公司 | Shaft blockage removing method and device for high-pressure gas well |
| CN111234794B (en) * | 2020-03-18 | 2020-10-27 | 北京大德广源石油技术服务有限公司 | Composite blocking remover and application method thereof |
| CN113464095B (en) * | 2020-03-30 | 2023-02-07 | 中国石油天然气股份有限公司 | Acidizing and blockage removing method for sandstone high-temperature and high-pressure gas well shaft |
| CN111379545A (en) * | 2020-04-17 | 2020-07-07 | 中国石油天然气集团有限公司 | Deep conglomerate heavy oil reservoir blockage removing and injection increasing method |
| CN111574981B (en) * | 2020-06-19 | 2021-06-01 | 西北大学 | Blocking remover for oil field and preparation method thereof |
| CN111997576A (en) * | 2020-09-01 | 2020-11-27 | 山东青洁能环保有限公司 | Supermolecule microcosmic blockage removing method for stratum reconstruction of oil and gas field |
| CN112177577A (en) * | 2020-11-30 | 2021-01-05 | 胜利油田东润机械工程有限责任公司 | Negative pressure flow-back blockage removing process for oil field |
| CN115991987B (en) * | 2021-10-18 | 2024-03-22 | 中国石油化工股份有限公司 | Enhanced film-forming type scouring-resistant emulsion and technological method for improving acidification effect of oil field |
| CN115873573A (en) * | 2022-12-27 | 2023-03-31 | 濮阳市宏华石油工程技术有限公司 | Acidizing plugging removal liquid, preparation method and application |
| CN116591649B (en) * | 2023-05-24 | 2023-11-21 | 固安国勘石油技术有限公司 | Reservoir blocking and water locking agent for gas well, design method, preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010700A (en) * | 2010-08-12 | 2011-04-13 | 天津市天诚化工有限公司 | High-efficiency inorganic blockage relieving agent |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN104295275A (en) * | 2013-07-17 | 2015-01-21 | 中国石油化工股份有限公司 | Deep blockage removal and injection increase method for water injection well of medium-and-high-permeability sandstone reservoir |
-
2015
- 2015-10-28 CN CN201510713949.0A patent/CN105255466B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010700A (en) * | 2010-08-12 | 2011-04-13 | 天津市天诚化工有限公司 | High-efficiency inorganic blockage relieving agent |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN104295275A (en) * | 2013-07-17 | 2015-01-21 | 中国石油化工股份有限公司 | Deep blockage removal and injection increase method for water injection well of medium-and-high-permeability sandstone reservoir |
Non-Patent Citations (6)
| Title |
|---|
| 一区石炭系双重介质火山岩油藏氟硼酸深部酸化及效果分析;任荣;《新疆石油科技》;19950315;第5卷(第1期);54-63 * |
| 化学缓速酸的缓速机理概述;王宝锋;《石油与天然气化工》;19940225;第23卷(第1期);47-52 * |
| 有机氟硼酸在王家岗敏感性地层的应用;汪竹;《油田化学》;20040330;第21卷(第1期);10-12 * |
| 氟硼酸深部酸化技术在石南油田中的应用研究;刘富强;《石油与天然气化工》;20070615;第36卷(第3期);243-246 * |
| 渤中25-1油田深部低渗储层酸化技术的研究及应用;郭良春;《天津科技》;20101025(第5期);18-21 * |
| 酸液体系的研究现状分析和现场应用;唐立杰;《广东化工》;20101125;第37卷(第11期);221-222 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105255466A (en) | 2016-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105255466B (en) | Oil well slow de-plugging agent and method for removing blockage | |
| CN105255467B (en) | A kind of composite blockage relieving agent for tight sandstone reservoir | |
| Portier et al. | Review on chemical stimulation techniques in oil industry and applications to geothermal systems | |
| Portier et al. | Chemical stimulation techniques for geothermal wells: experiments on the three-well EGS system at Soultz-sous-Forêts, France | |
| CN105295879B (en) | Suitable for the slow de-plugging agent of oil well of acid-sensitive reservoir | |
| CN105505360A (en) | Fluoroboric acid blocking remover and acidification de-blocking method | |
| CN101196109B (en) | Three-segment type block releasing technique for oil layer | |
| CN103937475B (en) | Carbon dioxide acidification blocking remover and process of not reversely discharging raffinate after acidification | |
| CN108822819A (en) | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid | |
| CN106014330B (en) | A method of improving leakage casing damaged well chemical plugging success rate | |
| CN103590768B (en) | Treatment method for abandoned uncased wells in coal mining area | |
| CN108865093B (en) | Infiltration-increasing blockage removing fluid for uranium mine and using method and application thereof | |
| CN108865092B (en) | Slow-release chelating acid for water injection well plugging removal and injection increase, preparation method and plugging removal and injection increase method | |
| CN108690588A (en) | Environment-friendly type de-plugging of well system, preparation method and its method for removing blockage | |
| CN103074050A (en) | Anti-scaling multi-hydrogen retarded acid for highly argillaceous sandstone reservoir | |
| CN104312570A (en) | Low-corrosion chemical themogenic pressurizing gel breaker and preparation method thereof | |
| CN105969327B (en) | A kind of plugging material and leak stopping slurry for protecting low pressure fracture-type reservoir | |
| CN109913192A (en) | Desalination de-plugging agent | |
| CN105950126A (en) | Delaying controlled-release acid for acidizing unblocking, preparation method of acid and acidizing unblocking method | |
| CN111621276A (en) | Solid acid plugging agent and method for removing stratum plugging by using same | |
| CN110439525A (en) | Coal bed gas horizontal well de-plugging, anti-reflection completion method | |
| CN108865107A (en) | A kind of low frictional resistance deep acidizing acid liquid for acid fracturing of oil/gas well | |
| CN103206192B (en) | A kind of method of quick removing oil well and nearly well oil reservoir indissoluble dirt | |
| Aboud et al. | Effective matrix acidizing in high-temperature environments | |
| CN102010700A (en) | High-efficiency inorganic blockage relieving agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |