CN106520089A - Gel plugging agent as well as preparation method and application thereof - Google Patents
Gel plugging agent as well as preparation method and application thereof Download PDFInfo
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- CN106520089A CN106520089A CN201610824089.2A CN201610824089A CN106520089A CN 106520089 A CN106520089 A CN 106520089A CN 201610824089 A CN201610824089 A CN 201610824089A CN 106520089 A CN106520089 A CN 106520089A
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- gel
- lost circulation
- gel used
- well lost
- plugging
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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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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- Sealing Material Composition (AREA)
Abstract
The invention provides a gel plugging agent as well as a preparation method and application thereof. The gel plugging agent provided by the invention is prepared from the following components in parts by weight: 100 parts of water, 15 to 20 parts of spherical gel, 0.6 to 1.1 parts of thickener, 3 to 6 parts of accelerant and 0 to 50 parts of density regulator. The gel plugging agent provided by the invention is good in fluidity and easy to pump up; the spherical gel per se has a bridge plugging effect, is good in intermiscibility, is strong in cementing power with rock, and can be squeezed into a leakage zone under temperature and pressure actions to form wholly motionless gel completely plugging the leakage zone, and the strength is gradually enhanced until the gel is solidified; the gel plugging agent cannot be wholly solidified and inter-linked, only the spherical gel per se is solidified, the solidified spherical gel can be extracted out, the construction is safe, and plug sweeping is not needed. The preparation method provided by the invention is simple, convenient and practical, and is suitable for large-scale industrialized production.
Description
Technical field
The present invention relates to oil gas field of engineering technology, more particularly to a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application.
Background technology
Leakage is because rock has the drop plies such as crack, tomography or solution cavity, due to the effect drilling well of positive differential pressure in drilling process
Liquid enters the phenomenon of drop ply.With going deep into for oil-gas exploration and development, bore the complicated leakage stratum of chance large fracture, solution cavity and gradually increase
Many, leakage becomes the technical barrier that puzzlement oil-gas exploration and development is smoothed out.After leakage occurs need to carry out leak stopping
Loss circulation material, in drilling leakage blockage operation, is pumped to drop ply typically by pumping equipment by operation, treats loss circulation material in drop ply
After forming insulating course, then carry out subsequent well work.Conventional blocking method has bridge slurry leak stopping and Cementing, but leak stopping material
Material is easily polluted, is diluted by stratum water and mud, is caused loss circulation material to soften, is degraded or be lost in, ultimately results in leak stopping failure.
Chinese invention patent (CN101863643A) discloses a kind of organophilic gel complex cement, is introduced by organophilic gel
The mode of cement system, improves disposable leak stopping success rate so as to more than 50%；Chinese invention patent (CN105567190A)
GEL USED FOR PLUGGING WELL LOST CIRCULATION in a kind of oilfield drilling plugging operations and preparation method thereof is disclosed, using aqueous solution polymerization, with suction
Water swelliong power is strong, can improve loss circulation material in drop ply containing various functional groups that can form mechanics interaction with drop ply
The advantage of retentivity.
But, as the GEL USED FOR PLUGGING WELL LOST CIRCULATION in existing gel leakage stopping technology belongs to overall cross-linked gel, its gluing time
Control bad being easily caused and pump into difficulty, and gel can not solidify, bearing capacity is weak after causing leak stopping, multiple leakage easily occurs.
The content of the invention
It is an object of the invention to provide a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application.The gel that the present invention is provided
Sealing agent good fluidity, it is easy to pumping, its loading layers gradually strengthens with the time until solidification after closure drop ply, plugging effect is good,
Bearing capacity is strong and is difficult multiple leakage.
The invention provides a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION, including the component of following weight portion：
100 parts of water；
15～20 parts of spherical gel；
0.6～1.1 part of thickener；
3～6 parts of accelerator；
0～50 part of density adjuster.
Preferably, the particle diameter of the spherical gel is 0.5～30mm.
Preferably, the particle diameter of the spherical gel is 0.5～2mm.
Preferably, the particle diameter of the spherical gel is 2～5mm.
Preferably, the particle diameter of the spherical gel is 5～30mm.
Preferably, the thickener includes hydroxypropyl methyl cellulose, guar gum, xanthans, carragheen and polypropylene
One or more in acylamide polymer.
Preferably, the accelerator includes diethyl amino propylamine, two methanediamine of isophthalic, imidazoles, methylimidazole, ethyl miaow
One or two in azoles, ethylmethylimidazolium and diethylmethyl toluenediamine.
Preferably, the density adjuster includes one or more in potassium chloride, sodium chloride, potassium formate and sodium metasilicate.
Present invention also offers the preparation method of GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal, comprises the following steps：
(1) water and thickener are mixed, obtains mixed serum；
(2) mixed serum that the step (1) is obtained is mixed with density adjuster, obtains base fluid；
(3) base fluid that the step (2) is obtained is mixed with spherical gel, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma；
(4) the GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma that the step (3) is obtained is mixed with accelerator, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
Present invention also offers GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal or the gel prepared according to above-mentioned technical proposal
Application of the sealing agent in oil well leak stopping.
The invention provides a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION, including the component of following weight portion：100 parts of water；Spherical gel 15～
20 parts；0.6～1.1 part of thickener；3～6 parts of accelerator；0～50 part of density adjuster.In the GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present invention is provided
Spherical gel suspension be dispersed in base fluid, without crosslinked action, good fluidity, be easy to pumping, pump a gel into as carrier
Drop ply, clamp-ons leakage channel, blocks drop ply；Spherical gel itself has crane span structure plugging action, and an intermiscibility is good, cementing with rock
Ability is strong, can clamp-on the motionless gel that drop ply forms an entirety, block drop ply completely under temperature pressure function, its intensity by
It is cumulative strong, until solidification；GEL USED FOR PLUGGING WELL LOST CIRCULATION will not integrally curing crosslinking, spherical gel body solidification only therein, after solidification
Can replace out, construction safety, it is not necessary to sweep plug.Test result indicate that, GEL USED FOR PLUGGING WELL LOST CIRCULATION 4h that the present invention is provided is curable, solidification
Bearing capacity is 7MPa afterwards, can as little as 856mL for wastage during leak stopping.
Specific embodiment
The invention provides a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION, including the component of following weight portion：100 parts of water；Spherical gel 15～
20 parts；0.6～1.1 part of thickener；3～6 parts of accelerator；0～50 part of density adjuster.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present invention is provided includes 15～20 parts of spherical gels, preferably 16～18 parts.In the present invention,
The particle diameter of the spherical gel is preferably 0.5～30mm.In the present invention, the diameter of the spherical gel is logical according to anticipation leakage
The size in road is selected.In the present invention, when the fracture width of leakage channel is 1～3mm, the particle diameter of the spherical gel
More preferably 0.5～2mm；When the fracture width of leakage channel is 3～5mm, the particle diameter of the spherical gel more preferably 2～
5mm；When the fracture width of leakage channel is more than 10mm, the particle diameter of the spherical gel is more preferably 5～30mm, most preferably
For 10～20mm.
The present invention does not have special restriction to the source of the spherical gel, using well known to those skilled in the art commercially available
Leak stopping gel.In the present invention, the gel of the spherical gel preferably Jingzhou Jiahua Technology Co., Ltd.'s production is blocked up
Leakage agent SoftSET.In the present invention, the spherical gel is the main material for blocking drop ply, can uniformly disperse to be suspended in base
In liquid, with crane span structure plugging action, an intermiscibility is good, strong with rock cementing power, and drop ply can be clamp-oned under temperature pressure function
Form the motionless gel of an entirety.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present invention is provided includes 0.6～1.1 part of thickener, preferably 0.8～1.0 part.In the present invention
In, the thickener preferably includes hydroxypropyl methyl cellulose, guar gum, xanthans, carragheen and polyacrylamide and birdss of the same feather flock together
One or more in compound.In the present invention, the thickener for sealing agent base fluid thickening main body, can with thickening base fluid,
So that spherical gel preferably suspends and disperses.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present invention is provided includes 3～6 parts of accelerator, preferably 4～5 parts.In the present invention, the rush
Enter agent preferably include diethyl amino propylamine, two methanediamine of isophthalic, imidazoles, methylimidazole, ethyl imidazol(e), ethylmethylimidazolium and
One or two in diethylmethyl toluenediamine.In the present invention, the accelerator can promote spherical at a certain temperature
The solidification of gel, for regulating and controlling the gel solidification time, assists gel solidification to complete.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present invention is provided includes 0～50 part of density adjuster, preferably 10～40 parts, more preferably 20
～30 parts.In the present invention, the addition of the density adjuster is selected according to actually required density.In the present invention,
The density adjuster preferably includes one or more in potassium chloride, sodium chloride, potassium formate and sodium metasilicate.In the present invention,
The density adjuster is used for the density for adjusting base fluid, makes spherical gel suspended dispersed in base fluid.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present invention is provided includes 100 parts of water, and the parts by weight of said components are all with 100 parts of water as base
It is accurate.
Present invention also offers the preparation method of GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal, comprises the following steps：
(1) water and thickener are mixed, obtains mixed serum；
(2) mixed serum that the step (1) is obtained is mixed with density adjuster, obtains base fluid；
(3) base fluid that the step (2) is obtained is mixed with spherical gel, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma；
(4) the GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma that the step (3) is obtained is mixed with accelerator, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
Water and thickener are mixed by the present invention, obtain mixed serum.Operation of the present invention to the mixing does not have special
Limit, using the technical scheme of mixing well known to those skilled in the art.The present invention preferably under agitation will be described
Thickener is added to the water and obtains mixed serum.In the present invention, the stirring is preferably mechanical agitation；The speed of the stirring is excellent
Elect 4000～6000rpm, more preferably 4500～5500rpm as；The time of the stirring is preferably 15～20min.
After obtaining mixed serum, the mixed serum is mixed by the present invention with density adjuster, obtains base fluid.The present invention is right
The operation of the mixing does not have special restriction, using the technical scheme of mixing well known to those skilled in the art.At this
In invention, the mixed serum is preferably carried out under agitation with the mixing of density adjuster.In the present invention, the stirring
Preferably mechanical agitation；The speed of the stirring is preferably 4000～6000rpm, more preferably 4500～5500rpm；It is described to stir
The time mixed is preferably 15～20min.
After obtaining base fluid, the base fluid is mixed by the present invention with spherical gel, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma.The present invention
Operation to the mixing does not have special restriction, using the technical scheme of mixing well known to those skilled in the art.
In the present invention, the base fluid is preferably carried out under agitation with the mixing of spherical gel.In the present invention, the stirring is preferred
For mechanical agitation；The speed of the stirring is preferably 300～400rpm, more preferably 340～360rpm；The time of the stirring
Preferably 3～5min.
After obtaining GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, the GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma is mixed by the present invention with accelerator, is obtained
GEL USED FOR PLUGGING WELL LOST CIRCULATION.Operation of the present invention to the mixing does not have special restriction, using mixing well known to those skilled in the art
Technical scheme.In the present invention, the mixing of the GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma and accelerator is preferably under agitation
Carry out.In the present invention, the stirring is preferably mechanical agitation；The speed of the stirring is preferably 300～400rpm, more preferably
For 340～360rpm；The time of the stirring is preferably 3～5min.
Present invention also offers GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal or the gel prepared according to above-mentioned technical proposal
Application of the sealing agent in oil well leak stopping, preferably includes following steps：
A GEL USED FOR PLUGGING WELL LOST CIRCULATION is pumped into pit shaft by (), make the estimated closure well section of GEL USED FOR PLUGGING WELL LOST CIRCULATION filling；
B () suppresses crowded GEL USED FOR PLUGGING WELL LOST CIRCULATION, make GEL USED FOR PLUGGING WELL LOST CIRCULATION enter leak source；
C () spherical gel solidification, completes closure.
GEL USED FOR PLUGGING WELL LOST CIRCULATION is preferably pumped into pit shaft by the present invention, makes the estimated closure well section of GEL USED FOR PLUGGING WELL LOST CIRCULATION filling.The present invention is right
The operation of the filling closure well section does not have special restriction, using the method for pumping into sealing agent well known to those skilled in the art
.GEL USED FOR PLUGGING WELL LOST CIRCULATION is pumped into pit shaft preferably with entering under drilling tool at 10～20 meters of more than leak source by the present invention.In the present invention,
When leakage speed is 10m3During/below h, it is preferred to use the GEL USED FOR PLUGGING WELL LOST CIRCULATION of the spherical gel containing 0.5～2mm particle diameters.In the present invention
In, when leakage speed is 10m3During/more than h, the drilling tool is preferably polish drill rod.In the present invention, the speed for pumping into is preferably
1.3～1.7m3/min。
After completing the filling, preferred pair GEL USED FOR PLUGGING WELL LOST CIRCULATION of the present invention carries out suppressing crowded, makes GEL USED FOR PLUGGING WELL LOST CIRCULATION enter leak source.This
Invention preferably suppress squeeze before by drilling tool rise GEL USED FOR PLUGGING WELL LOST CIRCULATION, closing preventer.It is in the present invention, described that to suppress crowded pressure preferred
For 1～3MPa, more preferably 1.8～2.2MPa；It is described to suppress crowded frequency preferably 1～3 time/h；It is described suppress it is crowded suppress it is excellent into amount
Elect 0.5～1.2m as3/ time, more preferably 0.8～1.0m3/ time.
The present invention preferably carries out waiting solidifying after suppressing crowded 3～5 times, makes spherical gel solidification, completes closure.In the present invention,
It is described to wait the solidifying time for 4～10h, more preferably 6～8h.
After completing the solidification, the sealing agent after preferred pair leak stopping of the present invention is post-processed.In the present invention, after described
Process preferably includes the removal replaced out with the spherical gel of unnecessary solidification of GEL USED FOR PLUGGING WELL LOST CIRCULATION base fluid.In the present invention, it is preferred to adopt
GEL USED FOR PLUGGING WELL LOST CIRCULATION base fluid is replaced out by drilling fluid.In the present invention, it is preferred to the unnecessary spherical gel of solidification be screened out using vibratory sieve.
In order to further illustrate the present invention, with reference to GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation side of the embodiment to present invention offer
Method and application are described in detail, but they can not be interpreted as limiting the scope of the present invention.
Embodiment 1:
(1) under 5000rpm stir speed (S.S.)s, 0.8 weight portion hydroxypropyl methyl cellulose is added in 100 weight portion water,
Mixed serum is obtained, 15min is stirred；
(2) under 5000rpm stir speed (S.S.)s, 35 weight portion potassium chloride is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 350rpm stir speed (S.S.)s, the spherical gel that 10 weight portion particle diameters are 0.5～2mm is added in base fluid, is stirred
4min is mixed, GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma is obtained；
(4) under 350rpm stir speed (S.S.)s, 3 weight portion diethyl amino propylamines are added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma,
Stirring 4min, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present embodiment is prepared is tested using HTHP fracture plugging instrument, in 80 DEG C of bars
Crack under part to width for 1.0mm blocks, and the performance test results are as shown in table 1.
Embodiment 2:
(1) under 4000rpm stir speed (S.S.)s, 0.8 weight portion guar gum is added in 100 weight portion water, is mixed
Slurries, stir 20min；
(2) under 4000rpm stir speed (S.S.)s, 30 parts by wt NaCl is added in mixed serum, base fluid is obtained, stirred
20min；
(3) under 300rpm stir speed (S.S.)s, the spherical gel that 10 weight portion particle diameters are 0.5～2mm is added in base fluid, is stirred
5min is mixed, GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma is obtained；
(4) under 300rpm stir speed (S.S.)s, 5 weight portion isophthalic, two methanediamine is added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, is stirred
5min is mixed, GEL USED FOR PLUGGING WELL LOST CIRCULATION is obtained.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present embodiment is prepared is tested using HTHP fracture plugging instrument, in 80 DEG C of bars
Crack under part to width for 2.0mm blocks, and the performance test results are as shown in table 1.
Embodiment 3:
(1) under 6000rpm stir speed (S.S.)s, 0.8 weight portion xanthans is added in 100 weight portion water, mixing slurry is obtained
Liquid, stirs 15min；
(2) under 6000rpm stir speed (S.S.)s, 30 weight portion potassium formates is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stir speed (S.S.)s, the spherical gel that 15 weight portion particle diameters are 0.5～2mm is added in base fluid, is stirred
3min is mixed, GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma is obtained；
(4) under 400rpm stir speed (S.S.)s, 5 weight portion imidazoles are added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, 3min is stirred, is obtained
To GEL USED FOR PLUGGING WELL LOST CIRCULATION.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present embodiment is prepared is tested using HTHP fracture plugging instrument, in 80 DEG C of bars
Crack under part to width for 3.0mm blocks, and the performance test results are as shown in table 1.
Embodiment 4:
(1) under 4500rpm stir speed (S.S.)s, 0.8 weight portion carragheen is added in 100 weight portion water, mixing slurry is obtained
Liquid, stirs 15min；
(2) under 4500rpm stir speed (S.S.)s, 40 weight portion sodium metasilicate is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stir speed (S.S.)s, the spherical gel that 10 weight portion particle diameters are 2～5mm is added in base fluid, stirring
4min, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma；
(4) under 400rpm stir speed (S.S.)s, 5 weight portion methylimidazoles are added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, stirring
4min, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present embodiment is prepared is tested using HTHP fracture plugging instrument, in 80 DEG C of bars
Crack under part to width for 3.0mm blocks, and the performance test results are as shown in table 1.
Embodiment 5:
(1) under 5500rpm stir speed (S.S.)s, 0.8 weight portion hydroxypropyl methyl cellulose is added in 100 weight portion water,
Mixed serum is obtained, 15min is stirred；
(2) under 5500rpm stir speed (S.S.)s, 35 weight portion potassium chloride is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stir speed (S.S.)s, the spherical gel that 15 weight portion particle diameters are 2～5mm is added in base fluid, stirring
4min, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma；
(4) under 400rpm stir speed (S.S.)s, 5 weight portion ethyl imidazol(e)s are added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, stirring
4min, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present embodiment is prepared is tested using HTHP fracture plugging instrument, in 80 DEG C of bars
Crack under part to width for 5.0mm blocks, and the performance test results are as shown in table 1.
Embodiment 6:
(1) under 5000rpm stir speed (S.S.)s, 0.8 weight portion hydroxypropyl methyl cellulose is added in 100 weight portion water,
Mixed serum is obtained, 20min is stirred；
(2) under 5000rpm stir speed (S.S.)s, 35 weight portion potassium chloride is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stir speed (S.S.)s, the spherical gel that 15 weight portion particle diameters are 5～10mm is added in base fluid, is stirred
4min is mixed, GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma is obtained；
(4) under 400rpm stir speed (S.S.)s, 5 weight portion ethylmethylimidazoliums are added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, is stirred
4min is mixed, GEL USED FOR PLUGGING WELL LOST CIRCULATION is obtained.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present embodiment is prepared is tested using HTHP fracture plugging instrument, in 80 DEG C of bars
Crack under part to width for 10.0mm blocks, and the performance test results are as shown in table 1.
Embodiment 7:
(1) under 5000rpm stir speed (S.S.)s, 0.8 weight portion hydroxypropyl methyl cellulose is added in 100 weight portion water,
Mixed serum is obtained, 20min is stirred；
(2) under 5000rpm stir speed (S.S.)s, 25 weight portion potassium chloride is added in mixed serum, base fluid is obtained, stirred
20min；
(3) under 400rpm stir speed (S.S.)s, the spherical gel that 15 weight portion particle diameters are 10～20mm is added in base fluid, is stirred
4min is mixed, GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma is obtained；
(4) under 400rpm stir speed (S.S.)s, 6 weight portion diethylmethyl toluenediamines are added into GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma
In, 4min is stirred, GEL USED FOR PLUGGING WELL LOST CIRCULATION is obtained.
The GEL USED FOR PLUGGING WELL LOST CIRCULATION that the present embodiment is prepared is tested using HTHP fracture plugging instrument, in 80 DEG C of bars
Crack under part to width for 10.0mm blocks, and the performance test results are as shown in table 1.
Embodiment 8:
(1) will enter under drilling tool at 10～20 meters of more than leak source, by the GEL USED FOR PLUGGING WELL LOST CIRCULATION prepared in embodiment 1 with
1.5m3The speed of/min pumps into pit shaft, the estimated closure well section of filling；
(2) drilling tool is risen, closes preventer, carry out suppressing with 2MPa pressure crowded, suppressed into amount 0.8m3/ time, suppressing crowded frequency is
1～3 time/h, suppress crowded 4 times；
(3) solidifying 6h is waited, spherical gel solidification is made, closure is completed；
(4) GEL USED FOR PLUGGING WELL LOST CIRCULATION base fluid is replaced out with drilling fluid, the unnecessary spherical gel of solidification is screened out with vibratory sieve.
The sealing characteristics of the GEL USED FOR PLUGGING WELL LOST CIRCULATION that 1 embodiment of the present invention of table is obtained
As can be seen from the above embodiments, GEL USED FOR PLUGGING WELL LOST CIRCULATION 4h that the present invention is provided is curable, bearing capacity after solidification
For 7MPa, can as little as 856mL for wastage during leak stopping.
The above is only the preferred embodiment of the present invention, not makees any pro forma restriction to the present invention.Should
Point out, for those skilled in the art, under the premise without departing from the principles of the invention, if can also make
Dry improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION, including the component of following weight portion：
100 parts of water；
15～20 parts of spherical gel；
0.6～1.1 part of thickener；
3～6 parts of accelerator；
0～50 part of density adjuster.
2. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 1, it is characterised in that the particle diameter of the spherical gel is 0.5～30mm.
3. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 2, it is characterised in that the particle diameter of the spherical gel is 0.5～2mm.
4. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 2, it is characterised in that the particle diameter of the spherical gel is 2～5mm.
5. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 2, it is characterised in that the particle diameter of the spherical gel is 5～30mm.
6. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 1, it is characterised in that the thickener includes hydroxypropyl methyl fiber
One or more in element, guar gum, xanthans, carragheen and polyacrylamide polymer.
7. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 1, it is characterised in that the accelerator include diethyl amino propylamine,
One kind in two methanediamine of isophthalic, imidazoles, methylimidazole, ethyl imidazol(e), ethylmethylimidazolium and diethylmethyl toluenediamine
Or two kinds.
8. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 1, it is characterised in that the density adjuster includes potassium chloride, chlorination
One or more in sodium, potassium formate and sodium metasilicate.
9. the preparation method of GEL USED FOR PLUGGING WELL LOST CIRCULATION described in claim 1～8 any one, comprises the following steps：
(1) water and thickener are mixed, obtains mixed serum；
(2) mixed serum that the step (1) is obtained is mixed with density adjuster, obtains base fluid；
(3) base fluid that the step (2) is obtained is mixed with spherical gel, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma；
(4) the GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma that the step (3) is obtained is mixed with accelerator, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
10. the gel that prepared by GEL USED FOR PLUGGING WELL LOST CIRCULATION described in claim 1～8 any one or preparation method described in claim 9 is blocked up
Leakage application of the agent in oil well leak stopping.
Priority Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777383A (en) * | 2019-03-18 | 2019-05-21 | 四川捷贝通能源科技有限公司 | A kind of multicore microballoon selective water shutoff agent and preparation method thereof |
| CN110700785A (en) * | 2019-10-29 | 2020-01-17 | 中国石油化工股份有限公司 | Sedimentation and floating composite leaking stoppage repairing method for damaged casing |
| CN112920785A (en) * | 2021-02-24 | 2021-06-08 | 西南石油大学 | Imidazole-enhanced superhigh temperature resistant liquid rubber plug and improved gelling test method thereof |
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| CN105754566A (en) * | 2016-05-06 | 2016-07-13 | 西南石油大学 | Polysaccharide polymer water plugging gel |
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| CN105754566A (en) * | 2016-05-06 | 2016-07-13 | 西南石油大学 | Polysaccharide polymer water plugging gel |
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| 刘文堂等: "球状凝胶复合封堵剂的研制与应用", 《石油钻探技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777383A (en) * | 2019-03-18 | 2019-05-21 | 四川捷贝通能源科技有限公司 | A kind of multicore microballoon selective water shutoff agent and preparation method thereof |
| CN109777383B (en) * | 2019-03-18 | 2021-07-06 | 四川捷贝通能源科技有限公司 | Multi-core microsphere selective water shutoff agent and preparation method thereof |
| CN110700785A (en) * | 2019-10-29 | 2020-01-17 | 中国石油化工股份有限公司 | Sedimentation and floating composite leaking stoppage repairing method for damaged casing |
| CN110700785B (en) * | 2019-10-29 | 2022-01-14 | 中国石油化工股份有限公司 | Sedimentation and floating composite leaking stoppage repairing method for damaged casing |
| CN112920785A (en) * | 2021-02-24 | 2021-06-08 | 西南石油大学 | Imidazole-enhanced superhigh temperature resistant liquid rubber plug and improved gelling test method thereof |
| CN112920785B (en) * | 2021-02-24 | 2022-03-25 | 西南石油大学 | Imidazole-enhanced superhigh temperature resistant liquid rubber plug and improved gelling test method thereof |
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| CN106520089B (en) | 2019-05-31 |
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