CN106675541A - Water-based flushing fluid - Google Patents
Water-based flushing fluid Download PDFInfo
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- CN106675541A CN106675541A CN201611250561.2A CN201611250561A CN106675541A CN 106675541 A CN106675541 A CN 106675541A CN 201611250561 A CN201611250561 A CN 201611250561A CN 106675541 A CN106675541 A CN 106675541A
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- water
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- flushing fluid
- flushing liquor
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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
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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
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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Abstract
The invention discloses water-based flushing fluid. The water-based flushing fluid is prepared from, by mass, 2-4% of nonionic surfactant, 3-5% of anionic surfactant, 1-2% of sodium dihydrogen phosphate, 0.5-1% of sodium hydroxide and the balance water. The water-based flushing fluid has the advantages that the water-based flushing fluid is excellent in physical and chemical effects and capable of improving interface cementation character and interface cementation quality; the water-based flushing fluid is capable of improving interface wettability effectively and enhancing affinity between casing pipes and cement rings; the water-based flushing fluid is capable of wetting, permeating, removing and scattering coherent substances such as interface retention drilling fluid effectively and particularly carrying a great amount of gelatinized drilling fluid retained in well segments irregular in diameter effectively, and interface and cement ring sealing quality is improved finally.
Description
Technical field
The present invention relates to chemical material field, and in particular to a kind of water base flushing liquor.
Background technology
Before the research and development of China's flushing liquor starts from 20 years, original adoption clear water introduced the thought and skill in west later
Art, absorbs flushing liquor and can rinse well cementation surface adhesion oil, improve the thought of interface performance important function, carried out corresponding
The research of flushing liquor system.The development of more than 20 years is experienced, the flushing liquor system of China's molding is still little, mainly has chemical punching
Washing liquid, dilution type flushing liquor, chemically washing solution add the surfactant system of a certain amount of compounding to prepare in being mainly clear water
Form, compound system is anion surfactant and nonionic surfactant composition, anion and non-ionic surface active
Agent has good cleaning greasy dirt, improves the effect of boundary moisture performance；Dilution type flushing liquor is mainly starched by base and mud
What diluent, shale stabilizer etc. were formulated, which is substantially exactly the flushing liquor being transformed by mud conditioning, and scene should at present
With it is most be exactly that finishing drilling drilling fluid is diluted anticalcium and processes as flushing liquor.Cleaning solution additive described in this paper is
One kind of chemically washing solution.
Gradually increase with growing, the oil-gas exploration difficulty of Demand of Oil ＆ Gas amount, deep ＆ ultra-deep well and complex hydrocarbon well
Appearance, the requirement to oil gas well cementing operation quality and improve cementing quality difficulty more and more higher, domestic original prepad fluid skill
Art can not meet the demand of modern well cementation.Domestic process of complex reservoir exploration exploitation and exceptional well cementing quality problem major embodiment
The problems such as low displacement efficiency, the water breakthrough of annular space oil gas and interface agglutination of poor quality is cemented the well, and using the prepad fluid technology of high-quality it is
Solution affects one of the important means of cementing quality factor and measure, so the high-quality that research is adapted to modern well cementation needs is preposition
Liquid technology be in the urgent need to.We must pay attention to and the two key factors of effectively solving, to obtain high cementing quality.Adopt
Effectively can aid in improving cementing quality with the preposition liquid system of high-quality, but by analyzing to current country's prepad fluid
Go out, domestic not enough for the important function understanding of prepad fluid, study mechanism is weak, and consumption design is unreasonable, therefore causes preposition
The effect of liquid scene application is not obvious all the time.
The content of the invention
To solve the above problems, the present invention is provided by the investigation of extensive data, indoor macroscopic view and microcosmos experiment analysis
The fresh water-based displacement of reservoir oil flushing liquor system of a set of high-quality.
For achieving the above object, the technical scheme taken of the present invention is：
A kind of water base flushing liquor, is prepared from by the raw material of following mass percent：
Nonionic surfactant 2-4%, anion surfactant 3-5%, sodium dihydrogen phosphate 1-2%, sodium hydroxide
0.5-1%, water surplus.
Preferably, the nonionic surfactant is fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, poly- second two
One or more in the carboxylate of alcohols.
Preferably, the anion surfactant be dodecylbenzene sodium sulfonate, the one kind or several in alkyl sodium sulfate
Kind.
The invention has the advantages that：
(1) flushing liquor obtained by has excellent improvement drilling fluid fluid ability, improves drilling fluid Turbulence Flow ability, improves
Displacement efficiency；
(2) flushing liquor obtained by has long-term (in general 1 year) stability, can deposit, and well cementation time-lag may continue to
Use.
(3) flushing liquor obtained by has site technique alternative, meets various process equipment conditions on well
(4) flushing liquor obtained by has excellent contamination resistance, can be effectively spaced apart fluid, prevents contact stain, especially
It is to eliminate after cement mortar is blended with drilling fluid, to easily cause the thickening of cement mortar moment or thickening time shortening phenomenon, it is ensured that well cementation is applied
Work safety；
(5) with excellent physics chemical action, improve interface agglutination characteristic, improve interface agglutination quality.First, effectively
Improve boundary moisture characteristic, improve the affinity of sleeve pipe and cement sheath；Second, the coherent substances such as drilling fluid are detained to interface effective
Moistening infiltration and remove peptizaiton and especially effectively carry a large amount of gelling drilling fluids that the irregular well section of hole diameter is detained, finally
Improve the airtight quality at interface and cement sheath.
Description of the drawings
Surface tension curves of the Fig. 1 for surfactant A.
Surface tension curves of the Fig. 2 for surfactant B
Surface tension curves of the Fig. 3 for surfactant C.
Surface tension curves of the Fig. 4 for surfactant D.
Specific embodiment
In order that objects and advantages of the present invention become more apparent, with reference to embodiments the present invention is carried out further
Describe in detail.It should be appreciated that specific embodiment described herein is not used to limit this only to explain the present invention
It is bright.
It is determined and evaluates using the surface tension of ring method Surfactant solution or flushing liquor.
Ring method determines capillary principle：When annulus prepared by a special material slow rise from liquid, will
Ring-type fluid column rising is carried, when fluid column comes off from annulus, exactly fluid column gravity is produced just above surface tension
Rise pulling force.Thus the surface tension of liquid can be obtained by the physical dimension of annulus, fluid column quality when fluid column comes off.Generally use
Platinum filament makes annulus, and it is hung on torsion balance, then rotates torsion wire so as to which leaching ring in a liquid slowly rises, at this moment
The liquid for pulling up is in cylinder.
When ring is popped out with liquid level (horizontal level of holding metallic rod is constant at any time), conducted oneself with dignity by liquid and ring is applied
Downward pulling force F=mg, the value and the resistance pulling force upwards of the surface tension around ring it is equal, i.e.,
+ 2 π (R '+2r) γ=4 π (R '+r) γ=4 π R γ of F=mg=2 π R ' γ
In formula：The quality of m- pull-up fluid columns；The mean radiuss of R- rings；
If the inside radius of ring is R ', the radius of platinum filament itself is r, the mean radiuss as R=R '+r of ring
As available from the above equation：γ=F/4 π R
If F is measured in experiment, γ just can be obtained, but the fluid column of actually pull-up is not cylinder, institute's above formula must also
A correction factor f must be multiplied by, so as to have：
γ=F/4 π Rf.
A kind of nonionic surfactant is selected, infiltration emulsifying and the wettability reversal ability of prepad fluid is improved, is made well cementation circle
Face is hydrophilic, makes solution can be good at penetrating into the inside of interface retentate, is conducive to the carrying out cleaned；Select a kind of anion
Surfactant, effectively cleans well cementation interface oil film and retentate；A kind of washing assisant is selected, permeance property and washing is improved
Performance；A kind of emulsifying agent is selected, in preposition liquor, can be improved from the greasy dirt and retentate stable emulsifying for washing down
Interface agglutination quality.According to documents and materials, the total dosage of surfactant is added with the 0.1%-1.0% (mass/volume) of flushing liquor
It is more suitable to enter.Nonionic surfactant is used alone, dosage is preferred with 0.4%-1.5%, using anion and nonionic
Surfactant compound, less than 1.5%, the ratio of anion and nonionic surfactant is 2: 1- for surfactant total amount
1∶1；Amphoteric surfactant typically with anion, nonionic surfactant compounding use, its dosage accounts for surfactant
The 3%-20% of total amount, accounts for the 0.05%-0.54% of flushing liquor system gross weight.Finally, this sample is by exhibiting high surface activity
Agent screening and performance evaluation, final choice nonionic surfactant A, a kind of cleaning additive B, a kind of anion surfactant
C, a kind of inorganic builders D, carry out rational consumption and compounding evaluation study.
1. surfactant A is a kind of nonionic surfactant, and outward appearance is light yellow clear thick liquid, with good
Penetration, penetration≤10 second；After which is neutralized, with efficient moistening, permeability, stronger alkaline-resisting, heat-resisting quantity, make
For alkaline-resisting, resistant to elevated temperatures penetrating agent and wetting agent, function admirable.
2. surfactant B is a kind of organic washing-assisting detergent, can aid in playing the cleaning performance of flushing liquor, be light yellow liquid
Body or liquid/paste, with good permeability, when coordinating with other surfactants, by generation multiplication effect, its cleaning force
Increase, soil dispersion, stability in hard water and skin protectant are good；It is clear that it is widely used in liquid detergent, liquid soap, metal
The aspects such as lotion, textile auxiliary.
3. surfactant C is a kind of anion surfactant, outward appearance be white solid powder have stronger moistening,
Washing performance, good foaming characteristic.It is widely used for the preparation of industrial, civilian various detergents, is used as to boil in printing and dyeing industry
Refining agent, detergent.Its frothing capacity is noted during use.
4. surfactant D is a kind of light yellow to yellow oily liquid, with the good ability for disperseing dirt, while
There is good dilution viscosity reduction and peptizaiton to drilling fluid.
Single surfactant competition
The surfactant solution of variable concentrations in water, determines surface tension.Prepared using hard water in experiment.
By Fig. 1, as can be seen that the surface tension of surfactant is with the increase of concentration, surface in Fig. 2, Fig. 3 and Fig. 4
Tension force is reduced, and after the concentration of solution reaches certain numerical value, surfactant forms micelle to surfactant in the solution,
This later surface tension is no longer reduced.Data display, anion surfactant and the capillary minimum of washing assisant.Give
We are tested there is provided being effectively data refer, in case next step kinds of surface activating agent compounding use.
It is ternary and quaternary built surfactant by the surface tension and table 2 that table 1 is binary built surfactant
Surface tension, as shown by data, polynary surfactant compound are lower than the surface tension of single surfactant, and ternary built is compared with two
First compounding effect is good, and quaternary built is good compared with ternary built effect, and quaternary built solution surface tension can be reduced to 29mN/m.It is former
Because being exactly to form mixed micelle after Recompounded multielement, it is even lower surface tension.
The surface tension table of 1 binary built surfactant of table
The surface tension table of 2 ternary of table and quaternary built surfactant
Why the surfactant Recompounded multielement System forming interfacial tension lower than single surfactantIt is single
There is critical micelle concentration in surfactant, surfactant forms micelle, oils after exceeding critical micelle concentration in the solution
Retentate forms low interfacial tension with surfactant, adds and hold in the middle of micelle after departing from from surface.And compound surfactant
Solution, when there is two or more surfactant, with the increase of total concentration, will also form aggregation.It is this poly-
The mixture of the various surfactants in collective's clearly solution, thus referred to as mixed micellazation.Initially form mixed micellazation
Surfactant total concentration represented with CMCM, referred to as mixes critical micelle concentration；After concentration is more than CMCM, unitary system and
Mixed system shows obvious difference in nature, and in CMCM, the difference between this composition is maximum, with the increasing of total concentration
Plus, the composition of mixed micellazation progressively levels off to the total composition of system.Multicomponent system must have the monomer of a component dense in CMCM
Degree reaches maximum, is correspondingly possible to produce maximum adsorption, and then the monomer concentration of the component declines with the increase of total concentration,
Absorption is also corresponding to be reduced, here it is mixed system in CMCM nearby may generation low table (boundary) face tension force the reason for.Therefore it is single
The interfacial tension of one surfactant solution and oils retentate is higher than the interfacial tension of combination solution and oils retentate.
With the assay method of six fast rotary viscosity measuring flush efficiencies：
Flushing liquor is prepared, is puddled uniformly, and 70 DEG C ± 1 DEG C of test temperature is heated in normal pressure multiviscosity meter.Unload backspin
Turn the rotation outer barrel of viscometer, claim its quality W0G rotating cylinder viscometer is rotated below outer barrel graduation mark part uniform with hairbrush by ()
Light crude oil is coated, and claims its quality W1(g).Load the flushing liquor for preparing in rotating cylinder viscometer specimen cup, its liquid level is to sample
Product cup graduation mark.Rotation outer barrel is put in the viscometer specimen cup equipped with flushing liquor, sample rotor graduation mark and viscometer is made
Cleanout fluid liquid level in specimen cup is parallel.Start rotating cylinder viscometer, rotated 5 minutes with 300/min rotating speeds.Take out sample rotor simultaneously
Drain away the water, claim its quality W2(g).Cleaning efficiency computing formula：
In formula：η --- flush efficiency, %
W0 --- rotation outer barrel quality (g)
W1 --- aggregate sample and rotation outer barrel quality (g) before rinsing
W2 --- aggregate sample and rotation outer barrel quality (g) after flushing
Water base flush efficiency is as shown in table 3-4.
3 water base flushing liquor system (1.0g/cm of table3) flush efficiency (70 DEG C)
| Sequence number | Drilling fluid density (g/cm3) | Concentration (%) | Washing time (min) | Flush efficiency (%) |
| 1 | 1.0 | 5 | 5 | 95 |
| 2 | 1.2 | 5 | 5 | 93 |
| 3 | 1.6 | 5 | 5 | 92 |
| 4 | 1.8 | 5 | 5 | 90 |
4 water base flushing liquor (1.0g/cm of table3) to different drilling fluid systems and crude oil, diesel oil flush efficiency
The cleaning solution additive worked out by this experiment be can be seen that from flush efficiency experimental data there is excellent flushing
Effect.Figure below is the developing result comparison diagram by taking crude oil as an example.
Flushing liquor series flushing liquor has the good compatibility (table 5-7) with drilling fluid, insulating liquid.
The compatibility experiments (60 DEG C) of 5 flushing liquor of table and oil base drilling fluid
6 flushing liquor of table and drilling fluid rheology compatibility experiments (90 DEG C)
Remarks：Drilling fluid density 1.2g/cm3, rinse liquid hold-up 5%, density 1.1g/cm3。
7 flushing liquor of table and insulating liquid compatibility experiments (25 DEG C)
Remarks：Insulating liquid density 1.5g/cm3, rinse liquid hold-up 5%, density 1.1g/cm3。
Spacer fluid formulation is designed
The composition of insulating liquid is relatively more, mainly including suspending agent, dispersant and heavy weight additive.Heavy weight additive is used for adjusting isolation
The density of liquid, to meet live application demand；Weighting material of the suspending agent for the insulating liquid that suspends, to ensure stablizing for slurry
Property；Dispersant is used for the rheological characteristic for improving insulating liquid, and on the premise of ensureing that slurry is stable, maximum reduces the viscous of insulating liquid
Degree, improves its mobility.By the dosage for adjusting different disposal agent, the separating liquid system of complete set is designed, for meeting
The construction requirement at scene, the design of separating liquid system composition and rheological property are shown in Table 8-10.
The composition design of 8 separating liquid system of table
9 separating liquid system rheological parameter of table
10 insulating liquid rheological property variation with temperature (1.25g/cm of table3)
The compatibility of insulating liquid, is which realizes one of important technology index of scene application.Insulating liquid and conventional cement slurries,
Drilling fluid has good rheology and the thickening compatibility (table 11-15).
11 insulating liquid of table and low-density cement mortar rheological compatibility (30 DEG C)
12 insulating liquid of table is tested with high-density cement mortar slurry fluidity
13 insulating liquid of table is thickened compatibility experiments with high-density cement mortar
14 insulating liquid of table and sodium salt polymer drilling fluid rheological compatibility (20 DEG C)
15 insulating liquid of table and sulphonated polymer mud rheological compatibility (140 DEG C)
The scope of application
Cement the well for high pressured slatwater layer, salt deposit, saline bed or adopt saline should select salt resistance additive when with slurry.
Using temperature range：20~140 DEG C of flushing liquor, 20~140 DEG C of insulating liquid.
Insulating liquid slurrying order water+suspending agent+diluent+other additive+heavy weight additives
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. a kind of water base flushing liquor, it is characterised in that be prepared from by the raw material of following mass percent：
Nonionic surfactant 2-4%, anion surfactant 3-5%, sodium dihydrogen phosphate 1-2%, sodium hydroxide 0.5-
1%th, water surplus.
2. a kind of water base flushing liquor as claimed in claim 1, it is characterised in that the nonionic surfactant is fatty alcohol
One or more in polyoxyethylene ether, alkylphenol polyoxyethylene, the carboxylate of polyethylene glycols.
3. a kind of water base flushing liquor as claimed in claim 1, it is characterised in that the anion surfactant is dodecane
One or more in base benzene sulfonic acid sodium salt, alkyl sodium sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611250561.2A CN106675541A (en) | 2016-12-16 | 2016-12-16 | Water-based flushing fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611250561.2A CN106675541A (en) | 2016-12-16 | 2016-12-16 | Water-based flushing fluid |
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| CN106675541A true CN106675541A (en) | 2017-05-17 |
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| CN201611250561.2A Pending CN106675541A (en) | 2016-12-16 | 2016-12-16 | Water-based flushing fluid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846013A (en) * | 2019-11-26 | 2020-02-28 | 西安建筑科技大学 | Well cementation flushing fluid for oil-based drilling fluid and preparation and application methods thereof |
| CN110862810A (en) * | 2019-12-10 | 2020-03-06 | 成都碳原时代科技有限公司 | Cleaning agent for efficient well flushing fluid and preparation method thereof |
| CN114426816A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant well cementation spacer fluid and preparation method and application thereof |
| CN115895625A (en) * | 2022-12-24 | 2023-04-04 | 成都华阳兴华化工有限公司 | Oil-based drilling fluid flushing agent for well cementation and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405265A (en) * | 2002-11-18 | 2003-03-26 | 大庆石油管理局 | Oil-based mud flushing liquor and preparation method thereof |
| CN1908111A (en) * | 2006-08-11 | 2007-02-07 | 大庆石油管理局 | High-temperature resistant water-base mud washing fluid |
| CN102732239A (en) * | 2012-07-24 | 2012-10-17 | 天津油孚科技发展有限公司 | Organic and inorganic composite flushing liquid as well as preparation method and applications thereof |
-
2016
- 2016-12-16 CN CN201611250561.2A patent/CN106675541A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405265A (en) * | 2002-11-18 | 2003-03-26 | 大庆石油管理局 | Oil-based mud flushing liquor and preparation method thereof |
| CN1908111A (en) * | 2006-08-11 | 2007-02-07 | 大庆石油管理局 | High-temperature resistant water-base mud washing fluid |
| CN102732239A (en) * | 2012-07-24 | 2012-10-17 | 天津油孚科技发展有限公司 | Organic and inorganic composite flushing liquid as well as preparation method and applications thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846013A (en) * | 2019-11-26 | 2020-02-28 | 西安建筑科技大学 | Well cementation flushing fluid for oil-based drilling fluid and preparation and application methods thereof |
| CN110862810A (en) * | 2019-12-10 | 2020-03-06 | 成都碳原时代科技有限公司 | Cleaning agent for efficient well flushing fluid and preparation method thereof |
| CN110862810B (en) * | 2019-12-10 | 2021-11-16 | 成都碳原时代科技有限公司 | Cleaning agent for efficient well flushing fluid and preparation method thereof |
| CN114426816A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant well cementation spacer fluid and preparation method and application thereof |
| CN115895625A (en) * | 2022-12-24 | 2023-04-04 | 成都华阳兴华化工有限公司 | Oil-based drilling fluid flushing agent for well cementation and preparation method thereof |
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