CN108949132A - A method of for the solid sand de-plugging treatment fluid of fine silt oil reservoir sand control, sand control treatment fluid system and with its sand control - Google Patents
A method of for the solid sand de-plugging treatment fluid of fine silt oil reservoir sand control, sand control treatment fluid system and with its sand control Download PDFInfo
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Abstract
The present invention relates to a kind of for the solid sand de-plugging treatment fluid of fine silt oil reservoir sand control, sand control treatment fluid system and with the method for its sand control, belongs to technical field of petroleum extraction.The solid sand de-plugging treatment fluid includes each component of following mass content: 8 ~ 12% solid sand de-plugging agents, 0.5 ~ 1.5% cleanup additive, 0.5 ~ 1.5% corrosion inhibiter, 1 ~ 2% ferrous stability, 1 ~ 2% mutual solvent, 1 ~ 2% ammonium chloride, surplus is water.The sand control treatment fluid system is made of pretreatment fluid, prepad fluid, treatment fluid and displacement fluid, and volume ratio is successively are as follows: 4 ~ 6:1 ~ 2:2-3:1-2, while also disclosing the method with the sand control treatment fluid system sand control.Sand control treatment fluid system each component synergistic effect forms bonding coat in fine sandstone and clay particle surface, cementing solid sand, after which implements, sand control obvious effect of increasing production.
Description
Technical field
It is a kind of for the solid sand de-plugging treatment fluid of fine silt oil reservoir sand control, sand control treatment fluid system and with its sand control
Method belongs to technical field of petroleum extraction.
Background technique
In oilfield development process, the low fine silt oil reservoir oil well of some cementing strengths in process of production, often can be with out
Sand influences, and to conventional sand output well, can be solved with conventional mechanical sand control method, but part producing well output be fine silt,
Shale or clay-type substance cause frequent holddown and well workover.It shakes out for this kind of, conventional mechanical sand control difficulty is larger, even if anti-
Sand success will also result in oil well output decline, ideal sand control purpose be not achieved.
Chinese patent (publication No.: 105019870 A, date of publication: 2015.11.04) discloses a kind of sand control side
Method, method includes the following steps: 1) using derrick by sand control pipe tripping in oil well, and the sand control pipe is made to reach oil reservoir
Top 9m-11m；Wellhead assembly is installed in oil well mouth again；2) pump truck for being used to convey sand prevention material is passed through into manifold of ground and well
Mouth device connection；3) oil pipe is made just to squeeze prepad fluid, so that prepad fluid and low-temperature setting promotor are squeezed to the stratum for needing sand control；
4) so that oil pipe is just squeezed sand prevention material, the sand prevention material that load fluid carries is squeezed to the stratum for needing sand control；5) make oil pipe just
Displacement fluid is squeezed, to sand prevention material sufficiently be squeezed to stratum, sand prevention material is avoided excessively to remain in pit shaft；6) closing well 2 days-
3 days, so that sand prevention material solidifies on stratum.The well sand prevention method that the invention provides can be such that stratum solidifies, and prevent oil well from sending out
The case where giving birth in debt, collapsing, or even scrapping, it is ensured that oil exploitation is gone on smoothly.
Chinese patent (publication No.: CN 102330545A, date of publication: 2012.01.25) discloses a kind of heavy crude reservoir oil
Well anti-sand method, and specifically disclose the following contents: firstly, preparation has: acting flow string, tripping in sand-flushing pipe column is visited
Sand face and sand washing, and pitching pressure testing act sand-flushing pipe column；Drifting pipe cleaning, well-flushing are carried out, acts drifting tubing string.Sand control construction packet
Include: it is deep to carry out magnetic orientation school for tripping in sand control pipe；It is qualified to carry out pressure testing；Setting, open fill channel；Direct circulation load fluid with
Quartz sand carries out back-up sand；It gives up, above mention sand control pipe, act Back-off Pipe String；Complete well, tripping in oil recovery flow string.The invention
The sand that method is ejected oil reservoir using the quartz sand filled in nitriding cutting seam sieve tube is kept off in outside, is avoided stratum sand drain and is entered pump
Cylinder, causes holddown.But this method is only preferable to the sand control effect of common heavy oil, is applied to heavy oil wells sand control, primary success
Rate 100%, individual well continuous production are more than 600 days.
But following disadvantage is still had with the above-mentioned prior art:
(1) mechanical sand control method can not prevent and treat the lesser fine silt of partial size, shale and clay-type substance；
(2) sand control screen is easily blocked by fine silt and shale, and oil well drop is caused to produce or do not go out；
(3) sand control pipe of the G.I.H Yi Beisha that gives up is buried, and when salvaging easily causes overhaul accident；
(4) fracturing sand control or filling anti-sand complex procedures, operating cost are high；
(5) it is higher to block Capability Requirement to interlayer for fracturing sand control technique；
(6) part shallow-layer unconsolidated reservoir crude oil freezing point is higher, and external treatment fluid easily causes cold damage to stratum.
Summary of the invention
First mesh of the invention is to provide a kind of solid sand de-plugging treatment fluid for fine silt oil reservoir sand control, be somebody's turn to do
Gu sand de-plugging treatment fluid can be used in the sand control processing of fine silt oil reservoir oil well.
Second mesh of the invention is to provide a kind of sand control treatment fluid system for fine silt oil reservoir oil well, the sand control
Treatment fluid system is made of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid, treatment fluid system each component collaboration
Effect forms bonding coat, cementing solid sand in fine sandstone and clay particle surface.
Third mesh of the invention be to provide it is a kind of with above-mentioned sand control treatment fluid system to fine silt oil reservoir sand control
Method, this method successively injects into well pretreatment fluid, prepad fluid, treatment fluid, displacement fluid, and closing well reacts after a certain period of time,
Can the production of complete well, after which implements, sand control obvious effect of increasing production.
To achieve the goals above, technical scheme is as follows:
A kind of solid sand de-plugging treatment fluid for fine silt oil reservoir sand control, each component comprising following mass content: 8 ~ 12%
Gu sand de-plugging agent, 0.5 ~ 1.5% cleanup additive, 0.5 ~ 1.5% corrosion inhibiter, 1 ~ 2% ferrous stability, 1 ~ 2% mutual solvent, 1 ~ 2%
Ammonium chloride, surplus are water.
The solid sand de-plugging agent is that XT-68 consolidates sand de-plugging agent.
The cleanup additive is polyol non-ionic surfactant.The cleanup additive is XT-05 cleanup additive.
The corrosion inhibiter is condensed-nuclei aromatics quaternary ammonium salt.Preferably IS-130 corrosion inhibiter.
The mutual solvent is ethylene glycol monoethyl ether, can reduce the absorption of corrosion inhibiter and surfactant in the earth formation,
Prevent emulsion plugging.Preferably TH-11 mutual solvent.
The ferrous stability is made of iron-retention agent and iron reducer etc., can delay iron gel in acidization
Precipitating, prevents secondary injury.Preferably SCA ferrous stability.
A kind of sand control treatment fluid system for fine silt oil reservoir oil well, by pretreatment fluid, prepad fluid, solid sand de-plugging processing
Liquid and displacement fluid composition, the volume ratio of the pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid are as follows: 40 ~ 60:10 ~
20:20-30:10-20；The solid sand de-plugging treatment fluid is solid sand de-plugging treatment fluid described above.
The pretreatment fluid includes each component of following mass content: 2 ~ 4% cleaning agents, surplus are water.Described is clear
Lotion is nonionic surfactant.The cleaning agent is AE-121 cleaning agent.
The prepad fluid include following mass content each component: 8 ~ 12% hydrochloric acid, 0.5 ~ 1.5% cleanup additive, 0.5 ~
1.5% corrosion inhibiter, 1 ~ 2% ferrous stability, 1 ~ 2% mutual solvent, 1 ~ 2% ammonium chloride, surplus are water.
The displacement fluid includes each component of following mass content: 0.5 ~ 1.5% cleanup additive, 1 ~ 2% mutual solvent, 1 ~ 2%
Ammonium chloride, surplus are water.
A method of using above-mentioned sand control treatment fluid system to fine silt oil reservoir sand control, comprising the following steps: with
The discharge capacity of the L/min of 260 L/min ~ 420 successively injects into well pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid, displacement fluid,
After closing well reacts 12 ~ 48 h, with 500 m3The discharge capacity of/h is passed through nitrogen to shaft bottom and helps 1 ~ 3 h of row.
After pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid, displacement fluid are injected into well, working solution enter after reservoir with
Physical-chemical reaction occurs for bottom mineral, forms bonding coat, cementing solid sand, to hinder in fine sandstone and clay particle surface
Stop the fine migration because of caused by liquid flowing, achievees the purpose that solid sand, Gu while sand, further reaction hydrolysis is realized
The purpose of removing clog in deep reservoir solves the problems, such as that oil well drop caused by being blocked as formation sand production and fine migration is produced and even stops well.
Part shallow-layer unconsolidated reservoir crude oil freezing point is higher, and external treatment fluid can cause cold damage to stratum, in order to avoid
Cold damage is caused to stratum, the temperature of the pretreatment fluid is higher than oil well measure well section formation temperature 8 ~ 15.
Compared with the prior art, beneficial effects of the present invention are as follows:
(1) present invention can effectively prevent the lesser fine silt of partial size, shale and the clay class that mechanical sand control method can not prevent and treat
Substance；
(2) purpose that removing clog in deep reservoir may be implemented while solid sand, avoids seepage channel and sand screen is blocked by fine silt
And the problem of causing oil well drop to produce；
(3) the construction technology step is simple, is not required to sand fracturing sand control, and underground is given up without sand screen, it is possible to prevente effectively from overhaul
Fishing, condition be suitble to when can fixed tubular column construction, reduce flow chart, reduce measure risk；
(4) construction pump injection pressure power is lower than formation fracture pressure, and it is lower to block Capability Requirement to interlayer；
(5) loose sand production petroleum reservoir crude oil freezing point is high, which heats pretreatment fluid, can avoid external liquid and makes to stratum
At cold damage, meet the production requirement to fine silt sand control of oil recovery factory.
Specific embodiment
1, raw materials used and equipment is as follows in the present invention:
AE-121 cleaning agent: Nanyang Teng Yuan petroleum Engineering Technological Service Co., Ltd provides；
XT-68 consolidates sand de-plugging agent: Xuan Tai Industrial Co., Ltd. of Xinxiang City provides；
XT-05 cleanup additive: Beijing Baofeng spring Petrotechnik Ltd. provides；
IS-130 corrosion inhibiter: Henan Oil Field Fei Ya industry parent company provides；
SCA ferrous stability: Beijing Baofeng spring Petrotechnik Ltd. provides；
TH-11 mutual solvent: Henan Oil Field Fei Ya industry parent company provides；
Hydrochloric acid and ammonium chloride are general commercial goods；
Equipment: 700 type pump trucks.
2, embodiment
Embodiment 1
The sand control treatment fluid system of the present embodiment is made of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid, described
The volume ratio of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid are as follows: 50:10:20:10.
The pretreatment fluid is grouped as by each group of following mass content: 2% AE-121 cleaning agent, 98% water.
The prepad fluid is grouped as by each group of following mass content: 12% hydrochloric acid, 0.5% XT-05 cleanup additive, 1.5%
IS-130 corrosion inhibiter, 2%SCA ferrous stability, 2%TH-11 mutual solvent, 2%NH4Cl, 80% water, the hydrochloric acid are technical grade
The hydrochloric acid that mass fraction is 31%.
The solid sand de-plugging treatment fluid is grouped as by each group of following mass content: 10% XT-68 consolidate sand de-plugging agent,
0.5%XT-05 cleanup additive, 2% IS-130 corrosion inhibiter, 2%SCA ferrous stability, 2% TH-11 mutual solvent, 1%NH4Cl, surplus
For water.
The displacement fluid is grouped as by each group of following mass content: 0.5% XT-05 cleanup additive, 2% TH-11 dissolve each other
Agent, 1% ammonium chloride, surplus are water.
Pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and the displacement fluid is stirring evenly preparation with liquid pool respectively
It forms.
Embodiment 2
The sand control treatment fluid system of the present embodiment is made of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid, described
The volume ratio of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid are as follows: 45:12:30:15.
The pretreatment fluid is grouped as by each group of following mass content: 2% AE-121 cleaning agent and 98% water are being matched
Stirring mixture forms in liquid pool.
The prepad fluid is grouped as by each group of following mass content: 10% hydrochloric acid, 0.5% XT-05 cleanup additive, 1.5%
IS-130 corrosion inhibiter, 2%SCA ferrous stability, 2%TH-11 mutual solvent, 2% NH4Cl and the water of surplus in liquid pool with stirring
Uniformly form.
The solid sand de-plugging treatment fluid is grouped as by each group of following mass content: 12% XT-68 consolidate sand de-plugging agent,
0.5% XT-05 cleanup additive, 2% IS-130 corrosion inhibiter, 2%SCA ferrous stability, 2% TH-11 mutual solvent, 1%NH4Cl and remaining
The water of amount is with stirring evenly in liquid pool.
The displacement fluid is grouped as by each group of following mass content: 0.5% XT-05 cleanup additive, 2% TH-11 dissolve each other
The water of agent, 1% ammonium chloride and surplus is with stirring evenly in liquid pool.
Pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and the displacement fluid is stirring evenly preparation with liquid pool respectively
It forms.
Embodiment 3
The sand control treatment fluid system of the present embodiment is made of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid, described
The volume ratio of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid are as follows: 60:20:25:20.
The pretreatment fluid is grouped as by each group of following mass content: 3.5% AE-121 type cleaning agent and 96.5%
Water is formed with stirring mixture in liquid pool.
The prepad fluid is grouped as by each group of following mass content: 8.0 % hydrochloric acid, 1.0% XT-05 cleanup additive,
0.5% IS-130 corrosion inhibiter, 1.0%SCA ferrous stability, 1.8%TH-11 mutual solvent, 1.0% NH4Cl and the water of surplus exist
With being stirred evenly in liquid pool.
The solid sand de-plugging treatment fluid is grouped as by each group of following mass content: 8% XT-68 consolidate sand de-plugging agent,
1.0% XT-05 cleanup additive, 1.5% IS-130 corrosion inhibiter, 1.2%SCA ferrous stability, 1.0% TH-11 mutual solvent, 1.7%
NH4Cl and the water of surplus in liquid pool with stirring evenly.
The displacement fluid is grouped as by each group of following mass content: 1.5% XT-05 cleanup additive, 1.2% TH-11 are mutual
The water of solvent, 2.0% ammonium chloride and surplus is with stirring evenly in liquid pool.
The pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid are matched stirring evenly with liquid pool respectively
It makes.
Embodiment 4
The sand control treatment fluid system of the present embodiment is made of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid, described
The volume ratio of pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid are as follows: 40:15:22:18.
The pretreatment fluid is grouped as by each group of following mass content: 5% AE-121 cleaning agent and 95% water are being matched
Stirring mixture forms in liquid pool.
The prepad fluid is grouped as by each group of following mass content: 9 % hydrochloric acid, 1.5% XT-05 cleanup additive, 1.0%
IS-130 corrosion inhibiter, 1.4%SCA sections ion stabilizer, 1.0%TH-11 mutual solvent, 1.2% NH4Cl and the water of surplus are matching liquid
It is stirred evenly in pond.
The solid sand de-plugging treatment fluid is grouped as by each group of following mass content: 9.0% XT-68 consolidate sand de-plugging agent,
1.5% XT-05 cleanup additive, 1.8% IS-130 corrosion inhibiter, 1.0%SCA ferrous stability, 1.5% TH-11 mutual solvent, 2.0%
NH4Cl and the water of surplus in liquid pool with stirring evenly.
The displacement fluid is grouped as by each group of mass content: 0.8% XT-05 cleanup additive, 1.0%TH-11 mutual solvent,
1.6% ammonium chloride and the water of surplus in liquid pool with stirring evenly.
The pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid are matched stirring evenly with liquid pool respectively
It makes.
Embodiment 5
Sand control treatment fluid system in embodiment 1 is acted on a bite producing well of two sections of the oil field Shuan He core, Quan Jing by the present embodiment
Produce H 222Layer, well spacing detachment layer 8m, formation sand production is serious, and sample examination analysis, the median particle size that shakes out is 0.125mm, adds
Upper viscosity of crude is higher (stock tank oil viscosity 3866mPas at 46.5 DEG C), gum asphaltic content 40.36%, shale
Content 10.1% can not be produced normally always, and successively carrying out extension filter sand control, frac-pack, oxidation de-plugging etc., repeatedly sand control de-plugging is arranged
It applies, still can not normally be produced after measure, effect of increasing production is undesirable.
Sand control measure site operation is carried out to the well using the sand control treatment fluid system of embodiment 1, using former well casing column, together
2 700 type pump trucks of Shi Qidong, directly successively squeeze into 50 m of pretreatment fluid from casing3, 10 m of prepad fluid3Gu sand de-plugging treatment fluid
20 m3With 10 m of displacement fluid3, in implementation process, pretreatment fluid when in use first with boiler car heat pre-treatment liquid to 60 DEG C, and
Control discharge capacity is 260 L/min, after closing well reacts 24 hours, using nitrogen vehicle with 500Nm3The discharge capacity of/h is passed through nitrogen to shaft bottom
The row of helping 1 hour.Using screw pump complete well production, by not going out before measure, to measure after produce 11 tons of liquid daily, 5.9 tons of oil-producing of day.Output
Liquid sand content is down to 0.1 ‰ by 0.5 ‰, normally produces 487 days at present, adds up to increase 1074.5 tons of oil, still continuous and effective, keep
Increase day by day 2.7 tons of oil, sand control obvious effect of increasing production.
Measure validity period 487 days after above method implementation, effective fine silt control efficiency, relatively conventional acidification are realized
Radius 2-3m, the process radius 5m or more have achieved the effect that removing clog in deep reservoir, while solid using the squeezing of fixed tubular column casing
Sand de-plugging saves 15.3 ten thousand yuan of operating cost, realizes the purpose of cost efficiency.
Embodiment 6
The present embodiment is tested with a bite producing well of the sand control treatment fluid system in embodiment 2 to Xia'ermen oilfield, the well
Perforations adding list adopts H2Ⅱ25Substratum is opened after pumping repeatedly because of the not fuel-displaced operation rectification of well card, is finally played pipe inspection pump, is risen in pump by fine silt
It blocks, tail pipe has 4 rice bran oil silt particles.Assay, median grain diameter d50=0.105mm, partial size is smaller, and conventional mechanical sand control difficulty is big,
Viscosity of crude 770mPa s at 50 DEG C, gum asphaltic content 31.3%, formation sand production is serious, and frequent holddown does not go out, multiple operation
Rectification, can not normally produce always.
Sand control measure site operation is carried out to the well using the sand control treatment fluid system in embodiment 2, while starting 3
700 type pump trucks, squeeze pressure control within 10Mpa, and treatment radius 4m successively squeezes into pretreatment fluid 45m3, when use needs
It is heated to 60 DEG C；Prepad fluid 12m3Gu sand de-plugging treatment fluid 30m3, 15 m of displacement fluid3, after closing well reacts 48 hours, use nitrogen
Vehicle is with 500Nm3The discharge capacity of/h is passed through nitrogen to shaft bottom and helps row 3 hours.
Well production is pumped using tubing string of sand setting, the well is not by going out to highest day oil-producing 11.3t, wellhead after measure
Sample, production fluid sand content are reduced to 0.15 ‰, have added up to increase 894 tons of oil, still continuous and effective at present, have kept 3 tons of the oil that increases day by day, continuously
Normal production 202 days, does not occur well card and stops well problem, illustrate preferably to realize fine silt oil reservoir sand control requirement.
Claims (10)
1. a kind of solid sand de-plugging treatment fluid for fine silt oil reservoir sand control, which is characterized in that at the solid sand de-plugging
Manage each component that liquid includes following mass content: 8 ~ 12% solid sand de-plugging agents, 0.5 ~ 1.5% cleanup additive, 0.5 ~ 1.5% corrosion inhibiter, 1 ~
2% ferrous stability, 1 ~ 2% mutual solvent, 1 ~ 2% ammonium chloride, surplus are water.
2. solid sand de-plugging treatment fluid according to claim 1, which is characterized in that the solid sand de-plugging agent is solid for XT-68
Sand de-plugging agent；The cleanup additive is polyol non-ionic surfactant；The corrosion inhibiter is condensed-nuclei aromatics quaternary ammonium salt；
The ferrous stability includes iron-retention agent and iron reducer；The mutual solvent includes ethylene glycol monoethyl ether.
3. solid sand de-plugging treatment fluid according to claim 1, which is characterized in that the cleanup additive is XT-05 cleanup additive；
The corrosion inhibiter is IS-130 corrosion inhibiter；The ferrous stability is SCA ferrous stability；The mutual solvent is
TH-11 mutual solvent.
4. a kind of sand control treatment fluid system for fine silt oil reservoir oil well, which is characterized in that by pretreatment fluid, prepad fluid, consolidate
Sand de-plugging treatment fluid and displacement fluid composition, the volume ratio of the pretreatment fluid, prepad fluid, solid sand de-plugging treatment fluid and displacement fluid
Are as follows: 40 ~ 60:10 ~ 20:20-30:10-20；The solid sand de-plugging treatment fluid is solid sand de-plugging treatment fluid described in claim 1.
5. sand control treatment fluid system according to claim 4, which is characterized in that the pretreatment fluid includes following quality
The each component of content: 2 ~ 4% cleaning agents, surplus are water；The cleaning agent is nonionic surfactant.
6. sand control treatment fluid system according to claim 5, which is characterized in that the cleaning agent is AE-121 cleaning
Agent.
7. sand control treatment fluid system according to claim 4, which is characterized in that the prepad fluid includes that following quality contains
The each component of amount: 8 ~ 12% hydrochloric acid, 0.5 ~ 1.5% cleanup additive, 0.5 ~ 1.5% corrosion inhibiter, 1 ~ 2% ferrous stability, 1 ~ 2% are mutually
Solvent, 1 ~ 2% ammonium chloride, surplus are water.
8. sand control treatment fluid system according to claim 4, which is characterized in that the displacement fluid includes that following quality contains
The each component of amount: 0.5 ~ 1.5% cleanup additive, 1 ~ 2% mutual solvent, 1 ~ 2% ammonium chloride, surplus are water.
9. a kind of method using sand control treatment fluid system as claimed in claim 4 to fine silt oil reservoir sand control, feature
It is, comprising the following steps: with the discharge capacity of the L/min of 260 L/min ~ 420 successively by pretreatment fluid, prepad fluid, treatment fluid, top
Inject into well for liquid, after closing well reacts 12 ~ 48 h, with 500 m3The discharge capacity of/h is passed through nitrogen to shaft bottom and helps 1 ~ 3 h of row.
10. the method for sand control according to claim 9, which is characterized in that the temperature of the pretreatment fluid is higher than oil well
8 ~ 15 DEG C of measure well section formation temperature.
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| CN201710390271.6A CN108949132B (en) | 2017-05-27 | 2017-05-27 | 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 |
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| CN201710390271.6A CN108949132B (en) | 2017-05-27 | 2017-05-27 | 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 |
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| CN112877046A (en) * | 2021-01-18 | 2021-06-01 | 中国石油化工股份有限公司 | Deep thickened oil blocking remover for oil well as preparation method and use method thereof |
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| CN111022011B (en) * | 2019-12-03 | 2022-03-18 | 中国石油化工股份有限公司 | Construction method of foamable resin sand consolidation agent for argillaceous fine silt oil reservoir |
| CN112727422A (en) * | 2020-12-21 | 2021-04-30 | 新疆永升能源有限责任公司 | Sand-carrying liquid squeezing reservoir transformation method |
| CN112877046A (en) * | 2021-01-18 | 2021-06-01 | 中国石油化工股份有限公司 | Deep thickened oil blocking remover for oil well as preparation method and use method thereof |
| CN112877046B (en) * | 2021-01-18 | 2024-01-05 | 中国石油化工股份有限公司 | Deep thickened oil blocking remover for oil well and preparation method and application method thereof |
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