CN106609133A - Multi-system long-time antiscale agent for oil well - Google Patents
Multi-system long-time antiscale agent for oil well Download PDFInfo
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- CN106609133A CN106609133A CN201610213924.9A CN201610213924A CN106609133A CN 106609133 A CN106609133 A CN 106609133A CN 201610213924 A CN201610213924 A CN 201610213924A CN 106609133 A CN106609133 A CN 106609133A
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- 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
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Abstract
The invention discloses a multi-system long-time antiscale agent for an oil well. The multi-system long-time antiscale agent is prepared from the following raw materials in parts by weight: 7 to 11 parts of fluoroboric acid, 3 to 5 parts of fatty alcohol-polyoxyethylene ether, 15 to 20 parts of hydroxy penta methylene phosphonic acid, 3 to 5 parts of hydrochloric acid, 2 to 4 parts of hydrofluoric acid, 0.05 to 0.06 part of vitamin C, 3 to 4 parts of methenamine, 0.001 to 0.002 part of sodium selenide aqueous solution, 15 to 25 parts of methyl alcohol, 8 to 12 parts of sodium gluconate, 6 to 8 parts of sodium ascorbate, 1 to 3 parts of ethydiaminedhephen acetic-Na, 15 to 25 parts of polyether polymeric chelating agent, 5 to 10 parts of emulsifier and 3 to 5 parts of stabilizer, wherein the emulsifier is sodium polyoxyethylene carboxylate, and the stabilizer is potassium polymaleate. The multi-system long-time antiscale agent has the effects of dispersion, solubilization, crystal distortion and electrostatic repulsion, and the multi-system long-time antiscale agent stays in stratum holes through absorption or a chemical reaction on stratum rock surfaces and is slowly released under the action of output liquid or injected water, so that a long-time antiscale effect is achieved, thereby increasing the liquid production capacity and the oil production capacity of the oil well and achieving the purposes of stable yield and increase yield.
Description
Technical field
The present invention relates to oil well preventing fouling field, specifically a kind of oil well many body system long lasting scale prevention agent.
Background technology
Oil field, due to the thermodynamic phase and chemical incompatibility of water, often results in oil well after developing into Water-cut Period
The problem of the fouling of pit shaft, ground system and water filling stratum, to production greatly harm is brought.Due to scale effect, cause
Oil well liquid-producing (oil) amount declines, and pipeline and heating furnace are blocked, while fouling also increases the rountrip of oil well, severe patient
Cause oil well to stop production or scrap, cause economic loss.Water filling formation scaling, then can block oil reservoir, decline productivity index,
So as to affect the development effectiveness and economic benefit in oil field.
Rock ore deposit mirror is risen according to indoor water drive simulation test data, fouling mechanisms result of study, live tartar preventing test and fouling coring
Determine data, have abundant argument explanation water filling formation scaling to be exist.Especially fouling inspection shaft is from less than more than 1300 meters stratum
The core for being obtained and its analysis of data, the dominant mechanism for illustrating water filling formation scaling is rich in SO4 2-Injection water and stratum water
In Ba2+、Sr2+、Ca2+Occur what chemical precipitation caused after mixing.
The regularity of distribution of fouling and the physical and numerical modeling phase not to the utmost for being carried out only based on thermodynamic argument in the past
Together, find there be calcium sulfate, barium sulfate scale in a large number with clay association in stratum.And formation scaling is not in water injection well, and one
As away from oil well shaft bottom 50-330 rice.
The content of the invention
It is an object of the invention to provide a kind of oil well many body system long lasting scale prevention of Liquid output that can improve oil well, stable yields volume increase
Agent, to solve the problems, such as above-mentioned background technology in propose.
For achieving the above object, the present invention provides following technical scheme：
A kind of oil well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：Fluoboric acid 7-11 parts, fatty alcohol polyoxy second
Alkene ether 3-5 parts, the methylenephosphonic acid 15-20 parts of hydroxyl five, hydrochloric acid 3-5 parts, Fluohydric acid. 2-4 parts, vitamin C 0.05-0.06 parts,
It is hexamethylenamine 3-4 parts, selenizing sodium water solution 0.001-0.002 parts, methanol 15-25 parts, sodium gluconate 8-12 parts, anti-bad
Hematic acid sodium 6-8 parts, the adjacent sodium 1-3 parts of ethylenediamine two, polyethers high-molecular chelating agent 15-25 parts, emulsifying agent 5-10
Part, stabilizer 3-5 parts.
As further scheme of the invention：The oil well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：Fluorine
Boric acid 8-10 parts, fatty alcohol-polyoxyethylene ether 3.5-4.5 parts, the methylenephosphonic acid 16-19 parts of hydroxyl five, hydrochloric acid 3.5-4.5 parts,
Fluohydric acid. 2.5-3.5 parts, vitamin C 0.052-0.058 parts, hexamethylenamine 3.2-3.8 parts, selenizing sodium water solution 0.0012-0.0018
Part, methanol 18-22 parts, sodium gluconate 9-11 parts, sodium ascorbate 6.5-7.5 parts, the adjacent sodium of ethylenediamine two
1.5-2.5 parts, polyethers high-molecular chelating agent 18-22 parts, emulsifying agent 6-9 parts, stabilizer 3.5-4.5 parts.
As further scheme of the invention：The oil well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：Fluorine
9 parts of boric acid, 4 parts of fatty alcohol-polyoxyethylene ether, 18 parts of five methylenephosphonic acid of hydroxyl, 4 parts of hydrochloric acid, 3 parts of Fluohydric acid., dimension
Raw element C0.055 parts, 3.5 parts of hexamethylenamine, 0.0015 part of selenizing sodium water solution, 20 parts of methanol, sodium gluconate 10
Part, 7 parts of sodium ascorbate, adjacent 2 parts of the sodium of ethylenediamine two, 20 parts of polyethers high-molecular chelating agent, emulsifying agent 8
Part, 4 parts of stabilizer.
As further scheme of the invention：Described emulsifying agent is Polyethylene oxide carboxylic acid sodium.
As further scheme of the invention：Described stabilizer is poly- maleic acid potassium.
Compared with prior art, the invention has the beneficial effects as follows：
The present invention has the effect of dispersion, solubilising, crystal lattice distortion and electrostatic repulsion, the absorption or chemistry on formation rock surface
Reaction makes it be trapped in formation pore, slowly discharges under production fluid or injection water effect, plays a part of long lasting scale prevention,
So as to improve the Liquid output oil production of oil well, the purpose of stable yields volume increase is reached.
Description of the drawings
Fig. 1 is oil-field flooding scaling tendency schematic diagram.
Fig. 2 is one of core permeability injury trial curve schematic diagram.
Fig. 3 is that core permeability injures the two of trial curve schematic diagram.
Well treatment radius and effect duration relation curve schematic diagram in when Fig. 4 is the employing present invention.
Fig. 5 is that the Z oil wells in embodiment 6 adopt Production development curve synoptic diagram after the present invention.
Fig. 6 is that the W oil wells in embodiment 7 adopt Production development curve synoptic diagram after the present invention.
Specific embodiment
The technical scheme of this patent is described in more detail with reference to specific embodiment.
Embodiment 1
A kind of oil well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：7 parts of fluoboric acid, aliphatic alcohol polyethenoxy
3 parts of ether, 15 parts of five methylenephosphonic acid of hydroxyl, 3 parts of hydrochloric acid, 2 parts of Fluohydric acid., 0.056 part of vitamin C, hexamethylenamine 3
Part, 0.001 part of selenizing sodium water solution, 15 parts of methanol, 8 parts of sodium gluconate, 6 parts of sodium ascorbate, ethylenediamine two are adjacent
1 part of sodium, 15 parts of polyethers high-molecular chelating agent, 5 parts of Polyethylene oxide carboxylic acid sodium, poly- maleic acid potassium 3
Part.
Embodiment 2
A kind of oil well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：8 parts of fluoboric acid, aliphatic alcohol polyethenoxy
3.5 parts of ether, 16 parts of five methylenephosphonic acid of hydroxyl, 3.5 parts of hydrochloric acid, 2.5 parts of Fluohydric acid., 0.052 part of vitamin C, Wu Luotuo
3.2 parts of product, 0.0012 part of selenizing sodium water solution, 18 parts of methanol, 9 parts of sodium gluconate, 6.5 parts of sodium ascorbate, second
Adjacent 1.5 parts of the sodium of diamidogen two, 18 parts of polyethers high-molecular chelating agent, 6 parts of Polyethylene oxide carboxylic acid sodium, poly- maleic
3.5 parts of diacid potassium.
Embodiment 3
A kind of well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：9 parts of fluoboric acid, fatty alcohol-polyoxyethylene ether
4 parts, 18 parts of five methylenephosphonic acid of hydroxyl, 4 parts of hydrochloric acid, 3 parts of Fluohydric acid., 0.055 part of vitamin C, hexamethylenamine 3.5
Part, 0.0015 part of selenizing sodium water solution, 20 parts of methanol, 10 parts of sodium gluconate, 7 parts of sodium ascorbate, ethylenediamine two
2 parts of adjacent sodium, 20 parts of polyethers high-molecular chelating agent, 8 parts of Polyethylene oxide carboxylic acid sodium, poly- maleic acid potassium 4
Part.
Embodiment 4
A kind of oil well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：10 parts of fluoboric acid, fatty alcohol polyoxy second
4.5 parts of alkene ether, 19 parts of five methylenephosphonic acid of hydroxyl, 4.5 parts of hydrochloric acid, 3.5 parts of Fluohydric acid., 0.058 part of vitamin C, Wu Luo
3.8 parts of tropine, 0.0018 part of selenizing sodium water solution, 22 parts of methanol, 11 parts of sodium gluconate, 7.5 parts of sodium ascorbate,
Adjacent 2.5 parts of the sodium of ethylenediamine two, 22 parts of polyethers high-molecular chelating agent, 9 parts of Polyethylene oxide carboxylic acid sodium, poly- suitable fourth
4.5 parts of enedioic acid potassium.
Embodiment 5
A kind of oil well many body system long lasting scale prevention agent, includes according to the raw material of weight portion：11 parts of fluoboric acid, fatty alcohol polyoxy second
5 parts of alkene ether, 20 parts of five methylenephosphonic acid of hydroxyl, 5 parts of hydrochloric acid, 4 parts of Fluohydric acid., vitamin C 0.0.06 parts, hexamethylenamine
4 parts, 0.002 part of selenizing sodium water solution, 25 parts of methanol, 12 parts of sodium gluconate, 8 parts of sodium ascorbate, ethylenediamine
Two adjacent 3 parts of sodiums, 25 parts of polyethers high-molecular chelating agent, 10 parts of Polyethylene oxide carboxylic acid sodium, poly- maleic acid
5 parts of potassium.
Field use example
Embodiment 6
Refer to Fig. 5, Z oil wells were once processed with 15% hydrochloric acid and KY-3 de-plugging agents respectively in 1 year, first time measure
Afterwards, producing liquid daily has and increases to 33m3, only 90 days effect duration by 26m3；After processing at second, daily output liquid increases to 58m3,
But then occur downward trend month by month after one month, after be down to 6m3/d；Third time is processed and not taken effect.This is adopted to the well
Bright scale preventative is processed, and daily output liquid is by 4m3Rise to 49m3, day oil-producing increase by more than 11 tons, be valid up to 10
More than individual month, add up to increase 3320 tons of oil.
As can be seen from Figure 5 after processing using the present invention, shaft bottom and near wellbore formation scale problems are successfully removed, effect is bright
Aobvious, effect duration is long.The inaccessiable effect of general clear anti-scaling measures is reached.
Embodiment 7
Fig. 6 is referred to, W wells were gone into operation in 2011, average pump detection period 45 days before construction.Pump is found in June, 2013
Upper fouling thickness reaches 10mm, and main dirt type is CaCO3, then in when beginning of the month application scale preventative of the present invention process.Daily fluid production rate
By 2.62m3It is raised to 6.84m3, daily oil production rises to 3.51 tons by 1.65 tons.
As seen from Figure 6 after scale preventative of the present invention process, daily output liquid is obviously improved with day oil-producing, and measure
Afterwards up to 6 months still effectively, the purpose of volume increase is served.
Method is choked using high pressure to process, the scale preventative of the present invention is clamp-oned under a certain pressure fouling well stratum, scale preventative and ground
Ca in layer water2+Generation precipitation, or it is adsorbed in formation rock surface.During opening well and making production, scale preventative is due to dissolving
Or analytic function, slowly discharging with production fluid, incrustation ion in stable water plays long-acting anti-scaling action.It is this to process same
When have scale suppression to act on downhole oil, sleeve pipe, beam hanger, oil well pump, tail pipe and near wellbore formation etc., be used in combination with descaling agent,
Integrated treatment is taken to oil well, more preferable effect can be obtained.
Polyethers high-molecular chelating agent is with the direct chelating of certain composition in dirt by forming soluble product in the present invention, so as to
Make insoluble dirt enter solution to discharge with production fluid.On the other hand, this chelation destroys the skeleton of dirty block, in dirty block
Organic substance, acid non-soluble substance etc. come off therewith for the deposit of oil, sweat and dirt on the skin, then discharge pit shaft with flushing fluid.Its application overcomes tradition
Caused by acidification technique the problems such as pipeline, equipment corrosion, the destruction of formation matrix pore structure and the secondary precipitation of dirt, it is adaptable to
Sulfate scale well and acid-sensitive stratum；The methylenephosphonic acid of hydroxyl five works well to carbonate and irony tamper, to acid-sensitive stratum
Also it is very applicable；In addition, the present invention is directed to, reservoir chlorite content is high, acid-sensitive strong, stratum water Ca (Ba) ion concentration is high,
Fouling serious problems, to remove based on fouling and clay mineral blocking, having dissolving concurrently wax deposit and prevents from being modified layer water outlet
One yield-increasing technology.
Fig. 4 is referred to, according to oil well fouling feature and fouling position, is to the snaking measure position of producing well：(1) perforation
Annular space within section top 100m；(2) oil reservoir of the nearly 5m radiuses of well 1 one of oil well.
The calculating of the amount of squeezing scale preventative：
M=h φ π γ2(formula 1)
In formula：H- core intersections, m；Φ-oil reservoir average pore, %；γ-Design Treatment radius, m.
Technological process determines that construction procedure is according to specific well conditions and scaling degree：Activated water well-flushing → squeeze prepad fluid → crowded antiscale
Agent → squeeze abundant well-flushing, the lower pump production after 48 hours of descaling agent (concentration is first low rear high) → displacement fluid → closing well.This technique is fitted
For the lighter well of fouling.Fast for fouling, the oil well of pit shaft dirt thickness can first squeeze high concentration descaling agent, and closing well reacts,
Implement processing step above again.
Fig. 1 is referred to, Fig. 1 contains SO for high4 2-Water contains Ba with high2+Stratum water mix after result of the test.As can be seen that
Containing SO4 2-Water mixes with stratum water, and the latent amount of fouling is high, and fouling tendency is extremely serious.
Fig. 2-3 are referred to, core flow test is carried out to oilfield sewage and the purified water Jing after processing, compare water after before processing
Impact situation to in-place permeability.Carry out simultaneously with high containing Ba2+Stratum water and height contain SO4 2-Stratum water carries out rock core displacement
When fouled condition test, intuitively to understand the presence of formation scaling and the extent of damage to oil reservoir.
Sewage in oil gathering station station, containing SO4 2-1300mg/l.Rock core displacement is carried out with the water, it is right as Injection volume PV=5
Rock core produce injury just reach 22.57%, PV for 85 when, injury rate reaches more than 80%.Illustrate that both water are serious
Incompatible, the water injection stratum can produce serious blocking injury.
Jing removes SO4 2Afterwards-Purified water, carry out rock core displacement, when Injection volume PV is from 5 to 25 times, the rock core of generation
Permeability injury is very low, only 2.6-1.71%, illustrates that both water-compatibles are fine.The water injection stratum, will not produce
Harmful impact.So as to prove that the water after processing is a kind of good injection water.
Scale preventative of the present invention disposably clamp-ons earth formation deep, can automatic continuous release medicine, have concurrently to pit shaft and near wellbore formation
Interior clear anti-anti-scaling action；With good stability, operating process is simple；The stratum near wellbore 1-5m can be prevented
Fouling, treatment radius are significantly increased, and elimination effect is more comprehensively more effective than other technologies；Measure effect duration is long, one-off construction
Antiscale afterwards is valid up to more than 1 year；The scale preventative reusable edible of low quality concentration；With good technological adaptability and
Specific aim.
The present invention has the effect of dispersion, solubilising, crystal lattice distortion and electrostatic repulsion, the absorption or chemistry on formation rock surface
Reaction makes it be trapped in formation pore, slowly discharges under production fluid or injection water effect, plays a part of long lasting scale prevention,
So as to improve the Liquid output oil production of oil well, the purpose of stable yields volume increase is reached.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment,
In the ken that one of ordinary skill in the art possesses, can be each to make on the premise of without departing from this patent objective
Plant change.
Claims (5)
1. a kind of oil well many body system long lasting scale prevention agent, it is characterised in that the raw material according to weight portion includes：Fluoboric acid 7-11 parts,
Fatty alcohol-polyoxyethylene ether 3-5 parts, the methylenephosphonic acid 15-20 parts of hydroxyl five, hydrochloric acid 3-5 parts, Fluohydric acid. 2-4 parts, vitamin
C0.05-0.06 parts, hexamethylenamine 3-4 parts, selenizing sodium water solution 0.001-0.002 parts, methanol 15-25 parts, gluconic acid
Sodium 8-12 parts, sodium ascorbate 6-8 parts, the adjacent sodium 1-3 parts of ethylenediamine two, polyethers high-molecular chelating agent 15-25
Part, emulsifying agent 5-10 parts, stabilizer 3-5 parts.
2. oil well many body system long lasting scale prevention agent according to claim 1, it is characterised in that according to the raw material bag of weight portion
Include：Fluoboric acid 8-10 parts, fatty alcohol-polyoxyethylene ether 3.5-4.5 parts, the methylenephosphonic acid 16-19 parts of hydroxyl five, hydrochloric acid 3.5-4.5
Part, Fluohydric acid. 2.5-3.5 parts, vitamin C 0.052-0.058 parts, hexamethylenamine 3.2-3.8 parts, selenizing sodium water solution
0.0012-0.0018 parts, methanol 18-22 parts, sodium gluconate 9-11 parts, sodium ascorbate 6.5-7.5 parts, ethylenediamine two
Adjacent sodium 1.5-2.5 parts, polyethers high-molecular chelating agent 18-22 parts, emulsifying agent 6-9 parts, stabilizer 3.5-4.5 parts.
3. oil well many body system long lasting scale prevention agent according to claim 1, it is characterised in that according to the raw material bag of weight portion
Include：9 parts of fluoboric acid, 4 parts of fatty alcohol-polyoxyethylene ether, 18 parts of five methylenephosphonic acid of hydroxyl, 4 parts of hydrochloric acid, Fluohydric acid. 3
Part, 0.055 part of vitamin C, 3.5 parts of hexamethylenamine, 0.0015 part of selenizing sodium water solution, 20 parts of methanol, gluconic acid
Adjacent 2 parts of the sodium of 10 parts of sodium, 7 parts of sodium ascorbate, ethylenediamine two, 20 parts of polyethers high-molecular chelating agent, breast
8 parts of agent, 4 parts of stabilizer.
4. according to the arbitrary described oil well many body system long lasting scale prevention agent of claim 1-3, it is characterised in that described emulsifying agent
For Polyethylene oxide carboxylic acid sodium.
5. according to the arbitrary described oil well many body system long lasting scale prevention agent of claim 1-3, it is characterised in that described stabilizer
For poly- maleic acid potassium.
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| CN201610213924.9A CN106609133A (en) | 2016-04-07 | 2016-04-07 | Multi-system long-time antiscale agent for oil well |
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| CN201610213924.9A CN106609133A (en) | 2016-04-07 | 2016-04-07 | Multi-system long-time antiscale agent for oil well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905767A (en) * | 2017-11-30 | 2018-04-13 | 中国石油天然气股份有限公司 | A kind of online acidization tool of clear antiscale of water injection well |
| CN108343398A (en) * | 2017-11-27 | 2018-07-31 | 中国石油天然气股份有限公司 | A kind of method of oil well antiscale |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108343398A (en) * | 2017-11-27 | 2018-07-31 | 中国石油天然气股份有限公司 | A kind of method of oil well antiscale |
| CN107905767A (en) * | 2017-11-30 | 2018-04-13 | 中国石油天然气股份有限公司 | A kind of online acidization tool of clear antiscale of water injection well |
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