CN105441052B - A kind of nonacid mud cake irrigation, flushing liquor and purging method - Google Patents
A kind of nonacid mud cake irrigation, flushing liquor and purging method Download PDFInfo
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- CN105441052B CN105441052B CN201510753194.7A CN201510753194A CN105441052B CN 105441052 B CN105441052 B CN 105441052B CN 201510753194 A CN201510753194 A CN 201510753194A CN 105441052 B CN105441052 B CN 105441052B
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000003973 irrigation Methods 0.000 title claims abstract description 18
- 230000002262 irrigation Effects 0.000 title claims abstract description 18
- 238000010926 purge Methods 0.000 title claims abstract description 16
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 17
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 13
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims description 13
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000004062 sedimentation Methods 0.000 abstract description 7
- 238000009736 wetting Methods 0.000 abstract description 5
- 239000002270 dispersing agent Substances 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000004945 emulsification Methods 0.000 abstract description 2
- 230000008595 infiltration Effects 0.000 abstract description 2
- 238000001764 infiltration Methods 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 238000005554 pickling Methods 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 20
- 238000005553 drilling Methods 0.000 description 16
- 239000012530 fluid Substances 0.000 description 15
- 239000000243 solution Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- YFDKVXNMRLLVSL-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid;sodium Chemical compound [Na].CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O YFDKVXNMRLLVSL-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- 229910000278 bentonite Inorganic materials 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000010985 leather Substances 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 101100421449 Caenorhabditis elegans shn-1 gene Proteins 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
Classifications
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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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Detergent Compositions (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a kind of nonacid mud cake irrigation, flushing liquor and purging method.The nonacid mud cake irrigation of the present invention, is grouped as by the group of following mass parts：40~50 parts of sodium tripolyphosphate, 10 parts of ammonium persulfate, 3~5 parts of anion surfactant.The irrigation can conveniently be configured to flushing liquor with water; sodium tripolyphosphate plays the role of dispersant in flushing liquor; ammonium persulfate plays the role of oxidant; anion surfactant can play the role of wetting, infiltration, emulsification, dispersion, solubilising, blistering; each component act synergistically, it is with strong points, it can be achieved that wall cake it is efficient wetting, decompose, removing; be conducive to reservoir protection, while avoiding using pickling flush liquid to the heavy corrosion caused by tubing string；Mixed liquor stability after being rinsed using the flushing liquor is good, has a good suspension stability, no sedimentation generation, and when site operation, which is easy to return, to be discharged, and the generation of downhole safety accident is reduced.
Description
Technical field
The invention belongs to petroleum drilling engineering chemical agent technical fields, and in particular to a kind of nonacid mud cake irrigation, punching
Washing lotion and purging method.
Background technology
In oil drilling technical process, mud cake is during leak-off, and the Free water of drilling fluid enters rock stratum, drilling fluid
In solid phase particles be attached to and formed on the borehole wall.High-quality mud cake can protect the borehole wall, effectively reduce leak-off.But it is boring
After the completion of well, when needing to recover the oil, then these mud cake removals formation are needed, because these mud cakes plug the hole of borehole wall surrounding
Gap makes oil in borehole wall surrounding oil reservoir that can not reduce the permeability of reservoir, increase oil gas and return row pressure power in access wall,
Cause oil and gas production to reduce, and is unfavorable for reservoir protection.
Mud cake also influences whether the cementing strength of cement sheath and casing and the borehole wall in well cementing process.Well cementation is to inject cement
The process of annular space between the borehole wall and casing.In casing and cementing, the interface between bunch tube and cement mortar becomes the first boundary
Face, the interface between cement mortar and the borehole wall become second contact surface.Due to hole anomaly, drilling fluid and cement mortar it is incompatible etc. because
Element easily forms microannulus in bore hole annulus interface and seriously affects cementing quality, or even draw to reduce interface cementing strength
Play oil gas water channeling.Thus, it carries out the technical study that drilling fluid and mud cake are effectively removed and is of great significance.
Flushing liquor is typically added surfactant or is formed with drilling fluid dilution mixture in water, however traditional flushing
Liquid is weak to the scouring capability of drill-in fluid, mud cake, can not efficiently clean up the drilling fluid on the borehole wall, to being formed on the borehole wall
Bao Erren and densification mud cake be even more can not effectively remove；In view of the above problems, there are many novel flushing liquor system faces
Generation.CN103965845A discloses a kind of shale gas horizontal cementing flushing liquor, mainly by nonionic surfactant 2~10
Part, puies forward 72~100 parts of 0.5~5.0 part of viscous extracting and cutting agent, clear water groups at 2~7 parts of anion surfactant, 2~4 parts of organic acid
At；The flushing liquor has certain shear force and viscosity, has stronger scouring capability；But due to the high polymer in mud cake have compared with
Strong caking property, the flushing liquor still cannot effectively be such that mud cake wetting decomposes, and the validity rinsed still needs to further increase.
CN104449621A discloses a kind of efficiently well cementation flushing liquor system, is grouped as by following group：100 parts of clear water,
0.2~0.8 part of fibrous material, 1.6~8.0 parts of oxidizing substance, 0.3~1.5 part of polymer, 0~120 part of heavy weight additive, salt 2.3
~9.7 parts, 0.5~7.2 part of organic acid, 2.0~10 parts of stabilizer, 0~0.6 part of dispersant.Oxidisability object in the flushing liquor
Matter can promote the organic polymer in mud cake to degrade, and to effectively reduce drilling fluid viscosity and filter cake texture intensity, have
Conducive to raising flush efficiency；But the flushing liquor recipe ingredient is complicated, and the organic acid in component is easy to cause to corrode to tubing string, increases
The difficulty of later stage underground work is added.
Invention content
The object of the present invention is to provide with a kind of nonacid mud cake irrigation, effectively decomposed for the property of mud cake
It rinses, and the irrigation is free of strong acid component, it is possible to reduce because the later stage corrodes the underground work brought.
Second object of the present invention is to provide a kind of nonacid mud cake flushing liquor being formulated by above-mentioned irrigation.
Third object of the present invention is to provide a kind of purging methods using above-mentioned flushing liquor in sieve tube completion.
In order to achieve the goal above, the technical solution adopted in the present invention is：
A kind of nonacid mud cake irrigation, is grouped as by the group of following mass parts：40~50 parts of sodium tripolyphosphate, persulfuric acid
10 parts of ammonium, 3~5 parts of anion surfactant.
Nonacid mud cake irrigation provided by the invention, sodium tripolyphosphate play the role of dispersant, can be in mud cake
Clay component (such as bentonite) be effectively disperseed, dispersion mechanism be double electrode layer theory：Small bits of clay institute band in solution
Negative electricity is stablized with the positively charged formation electric double layer of diffusion layer institute, electric double layer due to the balance of electrostatic force and extension, and double electricity are formed
Because electrical charge rejection acts between particle after layer so that the clay particle in mud cake is readily released into solution convenient for removing, and is removed
Particle keeps stabilization not flocculate in liquid；Ammonium persulfate is oxidizer composition, and decomposing the oxygen radical generated makes gathering in mud cake
It closes object generation chain-breaking reaction and becomes inviscid low molecule organic matter, package is adhered to bentonite, calcium carbonate etc. in high polymer
Particle releases to remove；Anion surfactant has the effects that wetting, infiltration, emulsification, dispersion, solubilising, blistering,
Mud cake can be made to be rinsed liquid wetting dissolving, while its stronger foamability faster, flushing liquor can be made in well-flushing
When be easier solid phase particles carrying to return and discharge, reduce secondary pollution.In the irrigation, three kinds of components are directed to mud cake respectively
In key component acted on, each component rational proportion, synergistic effect, substantially increase the cleaning performance of mud cake flushing liquor.
The anion surfactant is neopelex.
A kind of nonacid mud cake flushing liquor, consists of the following mass percentage components：Sodium tripolyphosphate 0.4~0.5%,
Ammonium persulfate 0.1%, anion surfactant 0.03~0.05%, surplus are water.
Nonacid mud cake flushing liquor provided by the invention is formulated by above-mentioned irrigation with water, irrigation and mass area ratio
Rationally, turbulence replacement can be formed and effectively rinse out the mud cake being attached on the borehole wall, change borehole wall water Wet Out, restore reservoir
Permeability, flushing effect is good；Strong acid is free of in the flushing liquor, heavy corrosion will not be caused to tubing string, reduces later stage operation,
Reduce safety accident；Mixed liquor stability after being rinsed simultaneously using the flushing liquor is good, has good suspend surely
Qualitative, no sedimentation occurs, and when site operation, which is easy to return, to be discharged, and the generation of downhole safety accident is reduced.
The anion surfactant is neopelex.
The preparation method of above-mentioned nonacid mud cake flushing liquor, by sodium tripolyphosphate, ammonium persulfate, anion surface active
Agent is dispersed in water, stir evenly to get.
This method preparation process is simple, does not have special requirement to equipment, convenient to be allocated at the construction field (site), has good
Good flushing effect, while also contributing to improve the bonding quality of well cementing process.
A kind of purging method using above-mentioned nonacid mud cake flushing liquor in sieve tube completion includes the following steps：
1) by, to away from being no more than at 50m at the top of screen casing, backwash is for slurry under Flushing tubular column；
2) Flushing tubular column is pressed into the distance no more than 50m and transfers progress backwash successively for slurry, until screen casing bottom.
In step 1) and step 2), the backwash is not less than 450L/min for the discharge capacity of slurry.The backwash can for slurry process
It carries out repeatedly, until inlet and outlet water quality is consistent.
Sieve tube completion purging method provided by the invention is, it can be achieved that one-trip string continuously instead squeezes brill outside flushing liquor cleaning screen casing
Well liquid operation in well-flushing terminates that cup packer can be safely removed, and reduces cup packer body wear, reduces construction wind
Danger, improves technique success rate.
Description of the drawings
Fig. 1 is the purging method related process tubing string schematic diagram of the embodiment of the present invention 1.
Specific implementation mode
The present invention is further explained in the light of specific embodiments.
Embodiment 1
The nonacid mud cake irrigation of the present embodiment, is grouped as by the group of following mass parts：50 parts of sodium tripolyphosphate, over cure
10 parts of sour ammonium, 3 parts of neopelex.
The nonacid mud cake flushing liquor of the present embodiment, consists of the following mass percentage components：Sodium tripolyphosphate
0.5%, ammonium persulfate 0.1%, neopelex 0.03%, surplus is water.
The preparation method of above-mentioned nonacid mud cake flushing liquor is by sodium tripolyphosphate, ammonium persulfate, dodecyl benzene sulfonic acid
Sodium is dispersed in water, stir evenly to get.
The purging method of the present embodiment, includes the following steps：
1) at away from 50m at the top of screen casing, first time backwash will be carried out with the discharge capacity not less than 450L/min under Flushing tubular column
For slurry；After anti-flushing well two weeks, it is consistent to reach inlet and outlet water quality；
2) Flushing tubular column is transferred successively by the distance of 50m and carries out backwash for slurry, until screen casing bottom.
Embodiment 2
The nonacid mud cake irrigation of the present embodiment, is grouped as by the group of following mass parts：40 parts of sodium tripolyphosphate, over cure
10 parts of sour ammonium, 5 parts of neopelex.
The nonacid mud cake flushing liquor of the present embodiment, consists of the following mass percentage components：Sodium tripolyphosphate
0.4%, ammonium persulfate 0.1%, neopelex 0.05%, surplus is water.
The preparation method of above-mentioned nonacid mud cake flushing liquor is by sodium tripolyphosphate, ammonium persulfate, dodecyl benzene sulfonic acid
Sodium is dispersed in water, stir evenly to get.
The purging method of the present embodiment, includes the following steps：
1) at away from 50m at the top of screen casing, first time backwash will be carried out with the discharge capacity not less than 450L/min under Flushing tubular column
For slurry；After anti-flushing well two weeks, it is consistent to reach inlet and outlet water quality；
2) Flushing tubular column is transferred successively by the distance of 50m and carries out backwash for slurry, until screen casing bottom.
Embodiment 3
The nonacid mud cake irrigation of the present embodiment, is grouped as by the group of following mass parts：45 parts of sodium tripolyphosphate, over cure
10 parts of sour ammonium, 4 parts of neopelex.
The nonacid mud cake flushing liquor of the present embodiment, consists of the following mass percentage components：Sodium tripolyphosphate
0.45%, ammonium persulfate 0.1%, neopelex 0.04%, surplus is water.
The preparation method of above-mentioned nonacid mud cake flushing liquor is by sodium tripolyphosphate, ammonium persulfate, dodecyl benzene sulfonic acid
Sodium is dispersed in water, stir evenly to get.
The purging method of the present embodiment, includes the following steps：
1) at away from 50m at the top of screen casing, first time backwash will be carried out with the discharge capacity not less than 450L/min under Flushing tubular column
For slurry；After anti-flushing well two weeks, it is consistent to reach inlet and outlet water quality；
2) Flushing tubular column is transferred successively by the distance of 50m and carries out backwash for slurry, until screen casing bottom.
Comparative example 1
This comparative example mud cake flushing liquor is water, and purging method is same as Example 1.
Test example
This test example is included the following steps using the cleaning efficiency of following experimental arrangements evaluation flushing liquor：
1) by scene obtain drilling fluid according to《Drilling liquid technology handbook》The method of high temperature and pressure dehydration is suppressed；
(drilling fluid used belongs to polymer non-invasive drilling fluid system：+ 0.4% sodium hydroxide of+0.4% sodium carbonate of 5% bentonite+
The unstressed configurations of 0.3-0.5%KPAM+0.3%HVCMC+0.3%LVCMC+0.5-1%SPC+0.5%SHN-1+0.4 %~0.6%
+ 2% extreme-pressure lubricant of+1% polymer elasticity microballoon shielding plugging agent of zero Invasive Drilling Fluid inorganic agents of anti-sloughing agent WFT-1+1%
The emulsified wax SL-1+ of JRH-616+2%~4% agstones)
2) mud cake is fixed on the outer barrel of six fast rotational viscometers with rubber band；
3) prepared flushing liquor is fitted into Washing cup, six fast rotational viscometer switches is opened, under fixed rotating speed
After (600r/min) rotates the regular hour (15min), mud cake is taken out, the cleaning situation of mud cake is checked, takes pictures；(the experiment time-division
Two kinds of fixed rotating speeds of 300r/min and 600r/min are not used, and experimental result is completely the same, can be more preferable using 600r/min
Turbulent condition when simulation shaft bottom is rinsed does not have an impact experiment conclusion so being set to 600r/min.)
Cleaning efficiency is calculated by following equation：
A=(G1-G2) × 100/ (G1-G0)
In formula：A --- cleaning efficiency, %；G0 --- rotating cylinder and filter weight, g；G1 --- rotating cylinder and filter paper after pressure mud cake
Weight, g；G2 --- rotating cylinder and filter weight after mud cake cleaning, g.
Flushing liquor after experiment is poured into graduated cylinder, flushing liquor stability is observed in 2h.Each embodiment and comparative example is rinsed
The flush efficiency and flushing liquor stability of liquid are as shown in table 1.
The flush efficiency and flushing liquor stability test result of 1 each embodiment and comparative example flushing liquor of table
| Serial number | Cleaning efficiency | Flushing liquor stability |
| Embodiment 1 | 95% | Stablize, without apparent sedimentation |
| Embodiment 2 | 96% | Stablize, without apparent sedimentation |
| Embodiment 3 | 95% | Stablize, without apparent sedimentation |
| Comparative example | 40% | It is unstable, there is sedimentation |
It, can be effective by the test result of table 1 it is found that mud cake cleaning solution cleaning efficiency provided by the invention is 95% or more
The mud cake on the borehole wall is cleaned, and the stability of each embodiment flushing liquor is good, no obvious sediment；Comparative example flushing liquor is unstable, has
Sedimentation occurs, and when site operation, which is not easy to return, to be discharged, and downhole safety accident is easily caused.
Fig. 1 is the relevant process pipe string schematic diagram of 1 purging method of embodiment, by lower and upper respectively well-flushing intubation 1, oil pipe
2, leather cup drag device 3, oil pipe 4, leather cup drag device 3, relief valve 5 and oil pipe string 6.
The entirety that relief valve and leather cup drag device are formed is defined as packer assembly.Previous mud cake cleaning, mud cake are clear
It washes there are one sealers, the S-shaped flowing of cleaning solution annular space between screen casing and inner tube is adopted to cannot effectively clean the borehole wall
With packer assembly, flow resistance of the cleaning solution between screen casing and inner tube is increased, limitation cleaning solution is as far as possible along well
Interior flowing between wall and screen casing annular space improves cleaning solution and involves range, effectively improves cleaning efficiency.Packer assembly there are two with
It is sequentially connected in series above and from top to bottom, boring ratio is in top in the sliding sleeve for the relief valve being below in adjacent two packer assembly
The sliding sleeve endoporus of relief valve is open.Pitching can be launched when well-flushing successively from small to large into Flushing tubular column, and with pitching
The sliding sleeve that high pressure flushing liquid can gradually be replaced to control corresponding relief valve by launching falls, and realizes that one-trip string continuously instead squeezes flushing fluid
The outer drilling mud practice of screen casing is cleaned, and classification can be realized for well operations are washed and starched by the pitching of input different-diameter.After well-flushing,
Relief valve can reduce packer pick-up drag, and cup packer is safely removed.
When carrying out well-flushing in horizontal well sieve tube completion, horizontal segment is divided into several sections by 50m first, is carried out piecewise successively
The decentralization cleaning borehole wall.It realizes that one-trip string transfers the outer drilling mud practice of cleaning screen casing paragraph by paragraph, improves cleaning solution and involve range, effectively carry
High cleaning efficiency.Cup packer increases the flow resistance between screen casing and inner tube, forces flushing fluid between screen casing and the borehole wall
Flowing improves the cleaning performance of the borehole wall, and the flushing fluid cleaned after the borehole wall is flowed into inner tube by the screen casing below cup packer
In, and then return out ground.After well-flushing, pitching, which builds the pressure, destroys sliding sleeve inside relief valve, while the upper end of relief valve can allow
Open the inner end aperture of discharge orifice so that the interior or exterior space of valve body is connected to, and realizes that oil jacket annular space is connected to pressure release, is reduced packer and is above carried
Resistance.And then efficiently the mud cake on the borehole wall is cleaned, restore the permeability of oil reservoir 7, oil exploitation process is facilitated to continue,
Safe and efficient progress.
Claims (5)
1. a kind of nonacid mud cake irrigation, which is characterized in that be grouped as by the group of following mass parts：Sodium tripolyphosphate 40~50
Part, 10 parts of ammonium persulfate, 3~5 parts of anion surfactant；
The anion surfactant is neopelex.
2. a kind of nonacid mud cake flushing liquor, which is characterized in that consist of the following mass percentage components：Sodium tripolyphosphate
0.4~0.5%, ammonium persulfate 0.1%, anion surfactant 0.03~0.05%, surplus is water；
The anion surfactant is neopelex.
3. a kind of purging method using the nonacid mud cake flushing liquor described in claim 2, which is characterized in that including following step
Suddenly：
1）By, to away from being no more than at 50m at the top of screen casing, backwash is for slurry under Flushing tubular column；
2）Flushing tubular column is pressed into the distance no more than 50m and transfers progress backwash successively for slurry, until screen casing bottom.
4. purging method according to claim 3, which is characterized in that step 1）With step 2）In, the backwash is for slurry
Discharge capacity is not less than 450L/min.
5. purging method according to claim 3, which is characterized in that step 1）With step 2）In, the backwash for starch into
Row is multiple, until inlet and outlet water quality is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753194.7A CN105441052B (en) | 2015-11-06 | 2015-11-06 | A kind of nonacid mud cake irrigation, flushing liquor and purging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753194.7A CN105441052B (en) | 2015-11-06 | 2015-11-06 | A kind of nonacid mud cake irrigation, flushing liquor and purging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105441052A CN105441052A (en) | 2016-03-30 |
| CN105441052B true CN105441052B (en) | 2018-07-17 |
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| CN201510753194.7A Active CN105441052B (en) | 2015-11-06 | 2015-11-06 | A kind of nonacid mud cake irrigation, flushing liquor and purging method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2411277C1 (en) * | 2009-09-14 | 2011-02-10 | Открытое акционерное общество "Научно-производственное объединение "Бурение" | Composition for preparing detergent flush fluid |
| CN103756653A (en) * | 2013-12-19 | 2014-04-30 | 中国石油集团渤海钻探工程有限公司 | Solid-free anti-salt cleaning type well cementation spacer fluid and preparation method thereof |
| CN103849364A (en) * | 2012-11-30 | 2014-06-11 | 天津中油渤星工程科技有限公司 | Flushing liquid for oil-based drilling fluid well cementation and preparation method thereof |
| CN104327817A (en) * | 2014-11-11 | 2015-02-04 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | Shaft oil stain detergent as well as preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6886635B2 (en) * | 2002-08-28 | 2005-05-03 | Tetra Technologies, Inc. | Filter cake removal fluid and method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2411277C1 (en) * | 2009-09-14 | 2011-02-10 | Открытое акционерное общество "Научно-производственное объединение "Бурение" | Composition for preparing detergent flush fluid |
| CN103849364A (en) * | 2012-11-30 | 2014-06-11 | 天津中油渤星工程科技有限公司 | Flushing liquid for oil-based drilling fluid well cementation and preparation method thereof |
| CN103756653A (en) * | 2013-12-19 | 2014-04-30 | 中国石油集团渤海钻探工程有限公司 | Solid-free anti-salt cleaning type well cementation spacer fluid and preparation method thereof |
| CN104327817A (en) * | 2014-11-11 | 2015-02-04 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | Shaft oil stain detergent as well as preparation method and application |
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