CN110317594A - A kind of sand control agent for realizing sand grains autohemagglutination - Google Patents
A kind of sand control agent for realizing sand grains autohemagglutination Download PDFInfo
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- CN110317594A CN110317594A CN201910744572.3A CN201910744572A CN110317594A CN 110317594 A CN110317594 A CN 110317594A CN 201910744572 A CN201910744572 A CN 201910744572A CN 110317594 A CN110317594 A CN 110317594A
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- autohemagglutination
- sand
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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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/572—Compositions based on water or polar solvents containing inorganic compounds
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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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5758—Macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
The invention belongs to the technical fields of oil development, are specifically related to a kind of sand control agent for realizing sand grains autohemagglutination.The sand control agent includes autohemagglutination liquid, autohemagglutination auxiliary agent and sand-fixating agent three parts；Wherein autohemagglutination liquid main component is natural polysaecharides compound, and autohemagglutination auxiliary agent main component is inorganic salts.The sand control agent realizes sand grains autohemagglutination by the synergistic effect between its chemical agent, and formation particle can be rolled into the corresponding position that briquetting is scheduled on stratum, hence it is evident that improves consolidation effect, increases sphere of action, good solid sand effect can be also played to fine silt.
Description
Technical field
The invention belongs to the technical fields of oil development, are specifically related to a kind of sand control agent for realizing sand grains autohemagglutination.
Background technique
In recent years, the recovery percent in most domestic oil field is constantly deepened, so that stratum energy declines rapidly, so as to cause
Sand production is serious, and then seriously restricts the daily normal production in oil field, therefore sand control work is extremely urgent.It mainly adopts at present
With composite sand prevention, wherein chemical sand control mainly uses coated sand to carry out sand control, and field application achieves certain effect, such as
Large-scale use of the high-strength hypertonic chemical sand control agent described in CN104650840B in oil field, while many new-type materials and sand control
Technology is gradually promoted and is used at the construction field (site).
But existing chemical sand control method also has certain problem: (1) cementing agent used by traditional chemical sand control is
Loose sand is only cementing at contact point, effective sand control face can not be formed, it is not high to be formed by cementing form intensity,
The consolidation effect of formation is poor, and the effect by strata pressure is easily broken, and sand control is caused to fail；And the cementing agent of injection needs very
High viscosity can be only achieved the cementing effect of the form, but the injection of high viscosity cementing agent will increase the burden of construction, peace again
Full property substantially reduces；(2) sand control is carried out by way of adhesion, cannot play solidification effect substantially for flour sand even silt
Fruit, sand control range is smaller, therefore sand controlling result can have a greatly reduced quality, and ideal sand controlling result is not achieved.
It would therefore be highly desirable to develop, a kind of consolidation effect is good, and the wider chemical sand control system of sphere of action becomes raising sand control
Success rate extends the sand control life, guarantees the key of oil field sand prevention effect.
Summary of the invention
It is an object of the invention to poor, the small problems of sphere of action for sand control agent consolidation effect used in traditional chemical sand control
And a kind of sand control agent for realizing sand grains autohemagglutination is provided, which realizes sand grains certainly by the synergistic effect between its chemical agent
It is poly-, formation particle can be rolled into the corresponding position that briquetting is scheduled on stratum, hence it is evident that consolidation effect is improved, sphere of action is increased,
Good solid sand effect can be also played to fine silt.
The technical solution of the present invention is as follows: a kind of sand control agent for realizing sand grains autohemagglutination, including autohemagglutination liquid, autohemagglutination auxiliary agent and solid sand
Agent three parts；Wherein autohemagglutination liquid main component is natural polysaecharides compound, and autohemagglutination auxiliary agent main component is inorganic salts.
The mass ratio of the autohemagglutination liquid and autohemagglutination auxiliary agent is 1:1~10；The mass ratio of autohemagglutination liquid and sand-fixating agent is 1~6:1.
The autohemagglutination liquid is natural polysaecharides compound water solution, and mass concentration is 0.1%~5%；The autohemagglutination auxiliary agent
For inorganic salt solution, mass concentration is 0.05%~10%.
The autohemagglutination liquid mass concentration is 3.0%~5%；The autohemagglutination auxiliary agent mass concentration is 1.2%~10%.
The natural polysaecharides compound is that sodium metasilicate, agar, gelatin, carragheen, xanthan gum, sodium alginate and shell are poly-
At least one of sugar.
Contained ion is Pb in the inorganic salts2+、Cu2+、Cd2+、Ba2+、Sr2+、Co2+、Ni2+、Zn2+、Mn2+、Al3+And H+
At least one of.
The sand-fixating agent is epoxy resin and its curative systems, unsaturated polyester resin and its curative systems, phenolic aldehyde
Resin and its curative systems and one of furane resins and its curative systems.
The autohemagglutination liquid is with 0.5~0.8m3The discharge capacity of/min is injected, and autohemagglutination auxiliary agent is with 0.8~1.0m3The discharge capacity of/min is infused
Enter, sand-fixating agent is with 0.3~0.5m3The discharge capacity of/min is injected.Three parts successively with the respectively described discharge capacity injection, can be formed compared with
Good sand rolls into a ball autohemagglutination effect, and sphere of action will be significantly larger than the addition of single sand prevention material, and final sphere of action can reach
To 20~80m.
The invention has the benefit that the sand control agent of the present invention for realizing sand grains autohemagglutination includes autohemagglutination liquid, autohemagglutination auxiliary agent
With sand-fixating agent three parts；Wherein autohemagglutination liquid main component is natural polysaecharides compound, and autohemagglutination auxiliary agent main component is inorganic salts.
For formation sand production, the present invention injects preimpregnation of the autohemagglutination liquid realization to formation particle first into stratum, backward
Autohemagglutination auxiliary agent is injected in stratum, autohemagglutination auxiliary agent and autohemagglutination liquid can crosslink effect in moment after stratum is met at this time, be formed
One three-dimensional crosslinked network structure, wherein by captures such as sand grains, to realize the pockets of effect of sand grains autohemagglutination.After the completion of autohemagglutination,
Sand grains is fixed on the corresponding position on stratum, for adapt to different reservoir feature, further increase autohemagglutination sand group consolidated sand strength and
Heat resistance, introduces sand-fixating agent on the basis of autohemagglutination early period, and the sand-fixating agent is injected into stratum, realizes packet in autohemagglutination sand group
It covers, just can solidify under the action of formation temperature by certain time, firm cross-linked network be formed, to improve autohemagglutination sand
The intensity that sand is rolled into a ball can be increased to 5MPa or more, while keep effective permeability at 6 μm by the consolidated sand strength and heat resistance of group2
Or more.
In conclusion sand control agent of the present invention includes three parts, three kinds of use innovative different chemical materials are carried out
Collective effect realizes sand grains autohemagglutination, realizes first with the high viscosity of autohemagglutination liquid to the prepreg process of formation particle, then exists
After contacting with autohemagglutination auxiliary agent, formation particle can be fixed on corresponding position in advance, can more efficiently play solid sand to be subsequent and beat
Lower solid foundation；Backward stratum in inject sand-fixating agent, under the action of formation temperature complete crosslinking curing process, be underground
Sand group provides suitable consolidated sand strength and heat resistance.It is injected using equipment of the same race, for existing chemical sand control agent,
The injection of this three kinds different chemical materials can extend effectively sphere of action, and sphere of action can achieve 20~80m, to reach
To ideal sand control area.
In the ratio range, different proportions is carried out to three parts and is combined, prepared sand column compression strength can
It is adjustable within the scope of 5~16MPa；The proportion of sand control agent can be carried out according to different formation conditions in this way, both saved at
This has reached certain correctional effect again, can promote sand control efficiency.
Three kinds of chemical materials are easily obtained simultaneously, and nonhazardous, environmental protection, and meeting oilfield chemistry needs the protection of environment
Ask, at the same prepare be easy, can Oil Field carry out prepare and at once come into operation, saved previous materials preparation at
This.Sand control agent of the present invention can improve the operative temperature of chemical sand control, action intensity and sphere of action.It is tried by scene
Verify bright, which achieves extraordinary sand controlling result in sandstone oil reservoir sand well.
Detailed description of the invention
Fig. 1 is influence comparison diagram of the autohemagglutination liquid different quality concentration to sand grains congregational rate in comparative experiments example 1.
Fig. 2 is influence comparison diagram of the autohemagglutination auxiliary agent different quality concentration to sand grains congregational rate in comparative experiments example 2.
Fig. 3 is the collective effect of autohemagglutination liquid in comparative experiments example 3 and autohemagglutination auxiliary agent to the function and effect comparison diagram of fine silt.
Specific embodiment
Below by embodiment, the present invention will be described in detail.
Embodiment 1
The sand control agent for realizing sand grains autohemagglutination, including autohemagglutination liquid, autohemagglutination auxiliary agent and sand-fixating agent three parts；Wherein autohemagglutination liquid
For sodium alginate aqueous solution, mass concentration 0.1%；Autohemagglutination auxiliary agent is copper chloride solution, mass concentration 0.05%；Gu sand
Agent is epoxy resin and its curative systems.
The autohemagglutination liquid, autohemagglutination auxiliary agent, sand-fixating agent mass ratio be 1:2:0.5.
It is derived from poly- liquid wetting sand grains, the sand grains for having infiltrated blend is introduced into autohemagglutination auxiliary agent later, can be formed moment
Autohemagglutination sand group introduces sand-fixating agent into sand group, realizes cladding in autohemagglutination sand group, and heatproof can be obtained after certain temperature solidification
140 DEG C, compression strength reaches the sand group of 10MPa.
Embodiment 2
The sand control agent for realizing sand grains autohemagglutination, including autohemagglutination liquid, autohemagglutination auxiliary agent and sand-fixating agent three parts；Wherein autohemagglutination liquid
For sodium metasilicate aqueous solution, mass concentration 5%；Autohemagglutination auxiliary agent is solder(ing)acid, mass concentration 10%；Sand-fixating agent is
Furane resins and its curative systems.
The autohemagglutination liquid, autohemagglutination auxiliary agent, sand-fixating agent mass ratio be 1:5:0.2.
Three kinds of above-mentioned materials infuse program by the pump of live practice of construction, first with 0.5~0.8m3The discharge capacity of/min is infused
Enter autohemagglutination liquid, then with 0.8~1.0m3The discharge capacity of/min injects autohemagglutination auxiliary agent, finally with 0.3~0.5m3The discharge capacity injection of/min is solid
Sand agent can form preferable sand group autohemagglutination effect with this, and sphere of action will be significantly larger than the addition of single sand prevention material,
Final sphere of action can achieve 20~80m.
Embodiment 3
The sand control agent for realizing sand grains autohemagglutination, including autohemagglutination liquid, autohemagglutination auxiliary agent and sand-fixating agent three parts；Wherein autohemagglutination liquid
For OK a karaoke club glue solution, mass concentration 3%；Autohemagglutination auxiliary agent is cobalt sulfate solution, mass concentration 1.2%；Sand-fixating agent is
Phenolic resin and its curative systems.
The autohemagglutination liquid, autohemagglutination auxiliary agent, sand-fixating agent mass ratio be 1:5:0.3.
Sand control agent described in the embodiment is applied in DAMAGE OF TIGHT SAND GAS RESERVOIRS straight well, wherein 120 DEG C of formation temperature, day shakes out
1.67m3/ d, 2012.7.30-2012.8.3 metal wool consider sandpipe sand control, and adding water over pumps is gone into operation；2013.10.15-11.2 high pressure
(height fills quartz sand 15m to filling anti-sand3)；2014.6.28-2014.7.20 pull out around leak stopping, hierarchically fill out+screen casing ring fills out, pumps and mix
Water is gone into operation, and (the reason is that pump and tail pipe silt particle are stifled, rockfill sand 15m on ground3)；2016.5.10-2015.5.16 inspection pumps, looks for leakage, card envelope
(Y211-150 sealing skin is bad, and the 42nd oil pipe ontology has a hole)；2017.3.7-2017.6.2 inspection pump, pull out envelope, pull out around, painting
4 times anti-, low-density sand control is once lower to pump (pump is intact)；2018.4.2 Ka Guan is pumped, water mixing well-flushing is obstructed under 8:00 is pumped, and 15:00 makees
Industry team works crane activity unfreezing, and well-flushing is invalid, and well head does not return water, analyzes sand card closing well.Determine inspection pump, sands insertion into layer, from
Poly- borehole wall sand control.The transformation of autohemagglutination sand control is carried out using the sand control agent:
(1) sand control pipe tail band pen tip visits sand face again under；
(2) replacement sealing washer of well head, the good well head of seat, first-class whole screws of wellhead, diagonal jackscrew are held out against；
(3) surface line is connected, pump testing, pressure testing 20MPa, 3min are not pierced and do not leaked for qualification；
(4) the positive well-flushing of adapter tube line clear water to casing returns liquid 5min, tries to squeeze 3-5m3Clear water asks water suction to refer to after pump pressure is stablized
Number, it is qualified, execute lower step；
(5) prepad fluid is just replaced, clear water just squeezes the associated constructions techniques such as autohemagglutination material.
Finally, by statistics of shaking out daily after sand control, the well sand control correctional effect is preferable, is changed using the sand control agent pressure break
Make rear day sand production rate without.
Embodiment 4
The sand control agent for realizing sand grains autohemagglutination, including autohemagglutination liquid, autohemagglutination auxiliary agent and sand-fixating agent three parts；Wherein autohemagglutination liquid
For aqueous agar solution, mass concentration 4%；Autohemagglutination auxiliary agent is barium chloride solution, mass concentration 5%；Sand-fixating agent is insatiable hunger
With polyester resin and its curative systems.
The autohemagglutination liquid, autohemagglutination auxiliary agent, sand-fixating agent mass ratio be 1:7:0.2.
Sand control agent described in the embodiment is applied to certain well, it is serious due to shaking out after 15 years refracturings of the well, always
It can not normally produce, carry out closing well afterwards.The well adds up oil-producing 121t before constructing, and after artificial borehole wall sand prevention, steam injection in June turns
It takes out, measuring crude oil sand content amount several times is " trace " or "None", and oil well starts normally to produce, and in 3 months, adds up to increase oil 798t.
Comparative experiments example 1
It is added after the autohemagglutination liquid of different quality concentration is mixed with sand grains into identical four parts of autohemagglutination auxiliary agents, observes sand grains
Congregational rate.It was found that when the mass concentration of autohemagglutination liquid is lower (such as 0.3%), it is bad to the congregational rate of sand grains, have obvious
Sand fallout situation.It with the raising of autohemagglutination liquid mass concentration, is significantly improved to the congregational rate of sand grains, when quality is dense
Degree has not observed the generation of sand fallout phenomenon when improving to 3.0%.As a result see Fig. 1.
Comparative experiments example 2
It is added separately to after autohemagglutination liquid is mixed with sand grains in the autohemagglutination auxiliary agent of different quality concentration, observes the aggregation of sand grains
Effect: discovery is bad to the congregational rate of sand grains when autohemagglutination auxiliary agent mass concentration is lower (such as 0.3%), there is apparent sand fallout
Situation.It with the raising of autohemagglutination auxiliary agent mass concentration, is significantly improved to the congregational rate of sand grains, when mass concentration mentions
When up to 1.20%, the generation of sand fallout phenomenon has not been observed.As a result see Fig. 2.
Comparative experiments example 3
It is used as matrix with quartz sand (50%), haydite (20-40 mesh, 25%), haydite (70-90 mesh, 25%), passes through change
Mass fraction (5% clay, 10% clay, 20% clay, 40% clay) simulated formation environment of clay observes autohemagglutination liquid and oneself
Function and effect of the collective effect of poly- auxiliary agent to fine silt.As a result see Fig. 3.
As can be known from Fig. 3, when the quality of clay reaches 40%, the collective effect of autohemagglutination liquid and autohemagglutination auxiliary agent is remained to body
System reaches good autohemagglutination effect, i.e. autohemagglutination system can play good solid sand effect to fine silt, and sand fallout phenomenon does not occur.
Claims (8)
1. a kind of sand control agent for realizing sand grains autohemagglutination, which is characterized in that including autohemagglutination liquid, autohemagglutination auxiliary agent and sand-fixating agent three parts；
Wherein autohemagglutination liquid main component is natural polysaecharides compound, and autohemagglutination auxiliary agent main component is inorganic salts.
2. realizing the sand control agent of sand grains autohemagglutination according to claim 1, which is characterized in that the autohemagglutination liquid and autohemagglutination auxiliary agent
Mass ratio is 1:1~10；The mass ratio of autohemagglutination liquid and sand-fixating agent is 1~6:1.
3. realizing the sand control agent of sand grains autohemagglutination according to claim 1, which is characterized in that the autohemagglutination liquid is natural polysaecharides
Compound water solution, mass concentration are 0.1%~5%；The autohemagglutination auxiliary agent is inorganic salt solution, mass concentration 0.05%
~10%.
4. realizing the sand control agent of sand grains autohemagglutination according to claim 3, which is characterized in that the autohemagglutination liquid mass concentration is
3.0%~5%；The autohemagglutination auxiliary agent mass concentration is 1.2%~10%.
5. realizing the sand control agent of sand grains autohemagglutination according to claim 1, which is characterized in that the natural polysaecharides compound is
At least one of sodium metasilicate, agar, gelatin, carragheen, xanthan gum, sodium alginate and chitosan.
6. realizing the sand control agent of sand grains autohemagglutination according to claim 1, which is characterized in that contained ion is in the inorganic salts
Pb2+、Cu2+、Cd2+、Ba2+、Sr2+、Co2+、Ni2+、Zn2+、Mn2+、Al3+And H+At least one of.
7. according to claim 1 realize sand grains autohemagglutination sand control agent, which is characterized in that the sand-fixating agent be epoxy resin and
Its curative systems, unsaturated polyester resin and its curative systems, phenolic resin and its curative systems and furane resins and
One of its curative systems.
8. realizing the sand control agent of sand grains autohemagglutination according to claim 1, which is characterized in that the autohemagglutination liquid is with 0.5~0.8m3/
The discharge capacity of min is injected, and autohemagglutination auxiliary agent is with 0.8~1.0m3The discharge capacity of/min is injected, and sand-fixating agent is with 0.3~0.5m3The discharge capacity of/min
Injection.
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| CN111690399A (en) * | 2020-04-27 | 2020-09-22 | 北京大德广源石油技术服务有限公司 | Sand control agent for fracturing and use method thereof |
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