CN106520089B - A kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application - Google Patents
A kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application Download PDFInfo
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- CN106520089B CN106520089B CN201610824089.2A CN201610824089A CN106520089B CN 106520089 B CN106520089 B CN 106520089B CN 201610824089 A CN201610824089 A CN 201610824089A CN 106520089 B CN106520089 B CN 106520089B
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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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Abstract
The present invention provides a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application.GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention comprises the following components in parts by weight: 100 parts of water；15~20 parts of spherical gel；0.6~1.1 part of thickener；3~6 parts of promotor；0~50 part of density adjuster.GEL USED FOR PLUGGING WELL LOST CIRCULATION good fluidity provided by the invention is easy to pump；Spherical gel itself has gantry plugging action, and intermiscibility is good, strong with rock cementing power, and the motionless gel that drop ply forms an entirety can be squeezed under temperature pressure function, and closure drop ply, intensity gradually increase completely, until solidification；GEL USED FOR PLUGGING WELL LOST CIRCULATION will not integrally curing crosslinking, spherical gel body solidification only therein can be for going out after solidification, and construction safety does not need to sweep plug.Preparation method provided by the invention is easy, practical, is suitable for large-scale industrial production.
Description
Technical field
The present invention relates to oil gas field of engineering technology, in particular to a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application.
Background technique
Leakage is because there are the drop plies such as crack, tomography or solution cavity for rock in drilling process, due to the effect drilling well of positive differential pressure
Liquid enters the phenomenon that drop ply.With going deep into for oil-gas exploration and development, bores and meet large fracture, solution cavity complexity leakage stratum gradually increases
More, leakage becomes the technical problem that puzzlement oil-gas exploration and development is gone on smoothly.It needs to carry out leak stopping after leakage generation
Plugging material is usually pumped to drop ply by pumping equipment, to plugging material in drop ply in drilling leakage blockage operation by operation
After forming insulating course, then carry out subsequent well work.Common blocking method has bridge slurry leak stopping and Cementing, but leak stopping material
Expect the pollution vulnerable to water flooding and mud, dilution, lead to plugging material softening, degradation or be lost, eventually leads to 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, and making it is more than 50%；Chinese invention patent (CN105567190A)
The GEL USED FOR PLUGGING WELL LOST CIRCULATION and preparation method thereof in a kind of oilfield drilling plugging operations is disclosed, using aqueous solution polymerization, has and inhales
Water swelliong power is strong, containing there are many functional groups that can form mechanics interaction with drop ply, and plugging material can be improved in drop ply
The advantages of retentivity.
But since the GEL USED FOR PLUGGING WELL LOST CIRCULATION in existing gel leakage stopping technology belongs to whole cross-linked gel, gluing time
It controls bad be easy to cause and is pumped into difficulty, and gel cannot solidify, cause bearing capacity after leak stopping weak, multiple leakage easily occurs.
Summary of the invention
The purpose of the present invention is to provide a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATIONs and its preparation method and application.Gel provided by the invention
Sealing agent good fluidity is easy to pump, and blocks its loading layers after drop ply and is gradually increased at any time until solidification, plugging effect is good,
Bearing capacity is strong and is not easy multiple leakage.
The present invention provides a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATIONs, comprise the following components in parts by weight:
100 parts of water；
15~20 parts of spherical gel；
0.6~1.1 part of thickener；
3~6 parts of promotor；
0~50 part of density adjuster.
Preferably, the partial size of the spherical gel is 0.5~30mm.
Preferably, the partial size of the spherical gel is 0.5~2mm.
Preferably, the partial size of the spherical gel is 2~5mm.
Preferably, the partial size of the spherical gel is 5~30mm.
Preferably, the thickener includes hydroxypropyl methyl cellulose, guar gum, xanthan gum, carragheen and polypropylene
One of acylamide polymer is a variety of.
Preferably, the promotor includes diethyl amino propylamine, two methanediamine of isophthalic, imidazoles, methylimidazole, ethyl miaow
One or both of azoles, ethylmethylimidazolium and diethylmethyl toluenediamine.
Preferably, the density adjuster includes one of potassium chloride, sodium chloride, potassium formate and sodium metasilicate or a variety of.
The present invention also provides the preparation methods of GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal, comprising the following steps:
(1) water and thickener are mixed, obtains mixed serum；
(2) mixed serum that the step (1) obtains is mixed with density adjuster, obtains base fluid；
(3) base fluid that the step (2) obtains 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) obtains is mixed with promotor, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
The present invention also provides GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal or the gels prepared according to above-mentioned technical proposal
Application of the sealing agent in oil well leak stopping.
The present invention provides a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATIONs, comprise the following components in parts by weight: 100 parts of water；Spherical gel 15~
20 parts；0.6~1.1 part of thickener；3~6 parts of promotor；0~50 part of density adjuster.In GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention
Spherical gel suspension be dispersed in base fluid, no crosslinked action, good fluidity is easy to pump, and pumps a gel into as carrier
Drop ply squeezes into leakage channel, blocks drop ply；Spherical gel itself has gantry plugging action, and intermiscibility is good, cementing with rock
Ability is strong, can be squeezed under temperature pressure function drop ply formed an entirety motionless gel, completely closure drop ply, 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 be for out, construction safety does not need to sweep plug.The experimental results showed that GEL USED FOR PLUGGING WELL LOST CIRCULATION 4h provided by the invention, that is, curable, solidification
Bearing capacity is 7MPa afterwards, and wastage can be down to 856mL when for leak stopping.
Specific embodiment
The present invention provides a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATIONs, comprise the following components in parts by weight: 100 parts of water；Spherical gel 15~
20 parts；0.6~1.1 part of thickener；3~6 parts of promotor；0~50 part of density adjuster.
GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention include 15~20 parts of spherical gels, preferably 16~18 parts.In the present invention,
The partial size 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 partial size of the spherical gel
More preferably 0.5~2mm；When the fracture width of leakage channel is 3~5mm, the partial size of the spherical gel is more preferably 2~
5mm；When the fracture width of leakage channel is 10mm or more, the partial size 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 spherical gel is preferably that the gel of Jingzhou Jiahua Technology Co., Ltd.'s production is stifled
Leak 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, there is gantry plugging action, intermiscibility is good, and it is strong with rock cementing power, drop ply can be squeezed under temperature pressure function
Form the motionless gel an of entirety.
GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention include 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, xanthan gum, carragheen and polyacrylamide and birdss of the same feather flock together
Close one of object or a variety of.In the present invention, the thickener is the thickening main body of sealing agent base fluid, can thicken base fluid,
To make spherical gel preferably suspend and disperse.
GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention include 3~6 parts of promotors, preferably 4~5 parts.In the present invention, the rush
Into agent preferably include diethyl amino propylamine, two methanediamine of isophthalic, imidazoles, methylimidazole, ethyl imidazol(e), ethylmethylimidazolium and
One or both of diethylmethyl toluenediamine.In the present invention, the promotor can promote spherical at a certain temperature
The solidification of gel assists gel solidification to complete for regulating and controlling the gel solidification time.
GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention includes 0~50 part of density adjuster, preferably 10~40 parts, more preferably 20
~30 parts.In the present invention, the additive amount of the density adjuster is selected according to actually required density.In the present invention,
The density adjuster preferably includes one of potassium chloride, sodium chloride, potassium formate and sodium metasilicate or a variety of.In the present invention,
The density adjuster is used to adjust the density of base fluid, makes spherical gel suspended dispersed in base fluid.
GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention includes 100 parts of water, and the parts by weight of said components are all using 100 parts of water as base
It is quasi-.
The present invention also provides the preparation methods of GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal, comprising the following steps:
(1) water and thickener are mixed, obtains mixed serum；
(2) mixed serum that the step (1) obtains is mixed with density adjuster, obtains base fluid；
(3) base fluid that the step (2) obtains 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) obtains is mixed with promotor, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
The present invention mixes water and thickener, obtains mixed serum.The present invention is not special to the operation of the mixing
It limits, using mixed technical solution well known to those skilled in the art.The present invention preferably under agitation will be described
Thickener is added to the water to obtain mixed serum.In the present invention, the stirring is preferably mechanical stirring；The rate of the stirring is excellent
It is selected as 4000~6000rpm, more preferably 4500~5500rpm；The time of the stirring is preferably 15~20min.
After obtaining mixed serum, the present invention mixes the mixed serum with density adjuster, obtains base fluid.The present invention couple
The not special restriction of the operation of the mixing, using mixed technical solution well known to those skilled in the art.At this
In invention, the mixing of the mixed serum and density adjuster preferably carries out under agitation.In the present invention, the stirring
Preferably mechanical stirring；The rate 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 present invention mixes the base fluid with spherical gel, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma.The present invention
The not special restriction of operation to the mixing, using mixed technical solution well known to those skilled in the art.?
In the present invention, the mixing of the base fluid and spherical gel preferably carries out under agitation.In the present invention, the stirring is preferred
For mechanical stirring；The rate 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 present invention mixes the GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma with promotor, obtains
GEL USED FOR PLUGGING WELL LOST CIRCULATION.The not special restriction of operation of the present invention to the mixing, using mixing well known to those skilled in the art
Technical solution.In the present invention, the mixing of the GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma and promotor is preferably under agitation
It carries out.In the present invention, the stirring is preferably mechanical stirring；The rate of the stirring is preferably 300~400rpm, more preferably
For 340~360rpm；The time of the stirring is preferably 3~5min.
The present invention also provides GEL USED FOR PLUGGING WELL LOST CIRCULATION described in above-mentioned technical proposal or the gels 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, makes GEL USED FOR PLUGGING WELL LOST CIRCULATION filling is estimated to block well section；
(b) crowded GEL USED FOR PLUGGING WELL LOST CIRCULATION is suppressed, GEL USED FOR PLUGGING WELL LOST CIRCULATION is made to enter leak source；
(c) spherical gel solidification is completed to block.
GEL USED FOR PLUGGING WELL LOST CIRCULATION is preferably pumped into pit shaft by the present invention, makes GEL USED FOR PLUGGING WELL LOST CIRCULATION filling is estimated to block well section.The present invention couple
The not special restriction of the operation of the filling closure well section, using the method well known to those skilled in the art for being pumped into sealing agent
?.The present invention preferably uses at 10~20 meters of drilling tool tripping in leak source or more, and GEL USED FOR PLUGGING WELL LOST CIRCULATION is pumped into pit shaft.In the present invention,
When leakage speed is 10m3When/h or less, it is preferred to use the GEL USED FOR PLUGGING WELL LOST CIRCULATION of the spherical gel containing 0.5~2mm partial size.In the present invention
In, when leakage speed is 10m3When/h or more, the drilling tool is preferably polish drill rod.In the present invention, the rate being pumped into is preferably
1.3~1.7m3/min。
After completing the filling, the present invention preferably suppress to GEL USED FOR PLUGGING WELL LOST CIRCULATION crowded, and GEL USED FOR PLUGGING WELL LOST CIRCULATION is made to enter leak source.This
Invention preferably suppress squeeze before by drilling tool rise GEL USED FOR PLUGGING WELL LOST CIRCULATION, close preventer.It is in the present invention, described that suppress crowded pressure preferred
For 1~3MPa, more preferably 1.8~2.2MPa；It is described that suppress crowded frequency be preferably 1~3 time/h；It is described suppress it is crowded suppress it is excellent into amount
It is selected as 0.5~1.2m3/ time, more preferably 0.8~1.0m3/ time.
The present invention, which preferably carries out waiting after suppressing crowded 3~5 times, to coagulate, and makes spherical gel solidification, completes to block.In the present invention,
It is described to wait the solidifying time as 4~10h, more preferably 6~8h.
After completing the solidification, the present invention preferably post-processes the sealing agent after leak stopping.In the present invention, after described
Processing preferably include GEL USED FOR PLUGGING WELL LOST CIRCULATION base fluid for go out and the extra removal for solidifying spherical gel.In the present invention, it is preferred to using
Drilling fluid goes out GEL USED FOR PLUGGING WELL LOST CIRCULATION base fluid.In the present invention, it is preferred to which the extra spherical gel of solidification is screened out using vibrating screen.
In order to further illustrate the present invention, below with reference to embodiment to GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention and its preparation side
Method and application are described in detail, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1:
(1) under 5000rpm stirring rate, 0.8 parts by weight hydroxypropyl methyl cellulose is added in 100 parts by weight water,
Mixed serum is obtained, 15min is stirred；
(2) under 5000rpm stirring rate, 35 parts by weight potassium chloride is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 350rpm stirring rate, the spherical gel that 10 parts by weight partial sizes 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 stirring rate, 3 parts by weight diethyl amino propylamines are added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma,
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 high temperature and pressure fracture plugging instrument, in 80 DEG C of items
The crack that width is 1.0mm is blocked under part, the performance test results are as shown in table 1.
Embodiment 2:
(1) under 4000rpm stirring rate, 0.8 parts by weight guar gum is added in 100 parts by weight water, is mixed
Slurries stir 20min；
(2) under 4000rpm stirring rate, 30 parts by wt NaCl is added in mixed serum, base fluid is obtained, stirred
20min；
(3) under 300rpm stirring rate, the spherical gel that 10 parts by weight partial sizes 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 stirring rate, 5 parts by weight 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 high temperature and pressure fracture plugging instrument, in 80 DEG C of items
The crack that width is 2.0mm is blocked under part, the performance test results are as shown in table 1.
Embodiment 3:
(1) under 6000rpm stirring rate, 0.8 parts by weight xanthan gum is added in 100 parts by weight water, mixing slurry is obtained
Liquid stirs 15min；
(2) under 6000rpm stirring rate, 30 parts by weight potassium formates is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stirring rate, the spherical gel that 15 parts by weight partial sizes 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 stirring rate, 5 parts by weight imidazoles are added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, 3min is stirred, obtains
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 high temperature and pressure fracture plugging instrument, in 80 DEG C of items
The crack that width is 3.0mm is blocked under part, the performance test results are as shown in table 1.
Embodiment 4:
(1) under 4500rpm stirring rate, 0.8 parts by weight carragheen is added in 100 parts by weight water, mixing slurry is obtained
Liquid stirs 15min；
(2) under 4500rpm stirring rate, 40 parts by weight sodium metasilicate is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stirring rate, the spherical gel that 10 parts by weight partial sizes are 2~5mm is added in base fluid, stirring
4min obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma；
(4) under 400rpm stirring rate, 5 parts by weight 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 high temperature and pressure fracture plugging instrument, in 80 DEG C of items
The crack that width is 3.0mm is blocked under part, the performance test results are as shown in table 1.
Embodiment 5:
(1) under 5500rpm stirring rate, 0.8 parts by weight hydroxypropyl methyl cellulose is added in 100 parts by weight water,
Mixed serum is obtained, 15min is stirred；
(2) under 5500rpm stirring rate, 35 parts by weight potassium chloride is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stirring rate, the spherical gel that 15 parts by weight partial sizes are 2~5mm is added in base fluid, stirring
4min obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma；
(4) under 400rpm stirring rate, 5 parts by weight 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 high temperature and pressure fracture plugging instrument, in 80 DEG C of items
The crack that width is 5.0mm is blocked under part, the performance test results are as shown in table 1.
Embodiment 6:
(1) under 5000rpm stirring rate, 0.8 parts by weight hydroxypropyl methyl cellulose is added in 100 parts by weight water,
Mixed serum is obtained, 20min is stirred；
(2) under 5000rpm stirring rate, 35 parts by weight potassium chloride is added in mixed serum, base fluid is obtained, stirred
15min；
(3) under 400rpm stirring rate, the spherical gel that 15 parts by weight partial sizes 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 stirring rate, 5 parts by weight ethylmethylimidazoliums is added in GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma, are 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 high temperature and pressure fracture plugging instrument, in 80 DEG C of items
The crack that width is 10.0mm is blocked under part, the performance test results are as shown in table 1.
Embodiment 7:
(1) under 5000rpm stirring rate, 0.8 parts by weight hydroxypropyl methyl cellulose is added in 100 parts by weight water,
Mixed serum is obtained, 20min is stirred；
(2) under 5000rpm stirring rate, 25 parts by weight potassium chloride is added in mixed serum, base fluid is obtained, stirred
20min；
(3) under 400rpm stirring rate, the spherical gel that 15 parts by weight partial sizes 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 stirring rate, GEL USED FOR PLUGGING WELL LOST CIRCULATION presoma is added in 6 parts by weight diethylmethyl toluenediamines
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 high temperature and pressure fracture plugging instrument, in 80 DEG C of items
The crack that width is 10.0mm is blocked under part, the performance test results are as shown in table 1.
Embodiment 8:
(1) by more than drilling tool tripping in leak source 10~20 meters, by the GEL USED FOR PLUGGING WELL LOST CIRCULATION being prepared in embodiment 1 with
1.5m3The rate of/min is pumped into pit shaft, fills estimated closure well section；
(2) drilling tool is risen, closes preventer, suppress with 2MPa pressure crowded, suppresses into amount 0.8m3/ time, suppressing crowded frequency is
It 1~3 time/h, suppresses crowded 4 times；
(3) solidifying 6h is waited, spherical gel solidification is made, completes to block；
(4) GEL USED FOR PLUGGING WELL LOST CIRCULATION base fluid is gone out with drilling fluid, is screened out the extra spherical gel of solidification with vibrating screen.
The sealing characteristics for the GEL USED FOR PLUGGING WELL LOST CIRCULATION that 1 embodiment of the present invention of table obtains
As can be seen from the above embodiments, GEL USED FOR PLUGGING WELL LOST CIRCULATION 4h provided by the invention, that is, curable, bearing capacity after solidification
For 7MPa, wastage can be down to 856mL when for leak stopping.
The above is only a preferred embodiment of the present invention, it is not intended to limit the present invention in any form.It should
It points out, for those skilled in the art, without departing from the principle of the present invention, if can also make
Dry improvements and modifications, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (6)
1. a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION is grouped as by the group of following parts by weight:
100 parts of water；
15~20 parts of spherical gel；
0.6~1.1 part of thickener；
3~6 parts of promotor；
0~50 part of density adjuster；
The spherical gel is the GEL USED FOR PLUGGING WELL LOST CIRCULATION SoftSET of Jingzhou Jiahua Technology Co., Ltd.'s production；
The partial size of the spherical gel is 0.5~30mm；
The thickener includes hydroxypropyl methyl cellulose, guar gum, xanthan gum, carragheen and polyacrylamide polymer
One of or it is a variety of；
The promotor includes diethyl amino propylamine, two methanediamine of isophthalic, imidazoles, methylimidazole, ethyl imidazol(e), ethyl-methyl
One or both of imidazoles and diethylmethyl toluenediamine；
The density adjuster includes one of potassium chloride, sodium chloride, potassium formate and sodium metasilicate or a variety of.
2. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 1, which is characterized in that the partial size of the spherical gel is 0.5~2mm.
3. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 1, which is characterized in that the partial size of the spherical gel is 2~5mm.
4. GEL USED FOR PLUGGING WELL LOST CIRCULATION according to claim 1, which is characterized in that the partial size of the spherical gel is 5~30mm.
5. the preparation method of GEL USED FOR PLUGGING WELL LOST CIRCULATION described in Claims 1 to 4 any one, comprising the following steps:
(1) water and thickener are mixed, obtains mixed serum；
(2) mixed serum that the step (1) obtains is mixed with density adjuster, obtains base fluid；
(3) base fluid that the step (2) obtains 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) obtains is mixed with promotor, obtains GEL USED FOR PLUGGING WELL LOST CIRCULATION.
6. the gel leak stopping of the preparation of preparation method described in GEL USED FOR PLUGGING WELL LOST CIRCULATION described in Claims 1 to 4 any one or claim 5
Application of the agent in oil well leak stopping.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610824089.2A CN106520089B (en) | 2016-09-14 | 2016-09-14 | A kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application |
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| CN201610824089.2A CN106520089B (en) | 2016-09-14 | 2016-09-14 | A kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION and its preparation method and application |
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| 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 |
| 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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| CN105754566A (en) * | 2016-05-06 | 2016-07-13 | 西南石油大学 | Polysaccharide polymer water plugging gel |
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| 球状凝胶复合封堵剂的研制与应用;刘文堂等;《石油钻探技术》;20160331;第44卷(第2期);34-39 |
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Effective date of registration: 20200424 Address after: 434000, No. 1, South Ring Road, Shashi District, Hubei, Jingzhou Co-patentee after: JINGZHOU JIAHUA TECHNOLOGY Co.,Ltd. Patentee after: Yangtze University Co-patentee after: COSL CHEMICALS (TIANJIN) Co.,Ltd. Address before: 434000 No.1, South Ring Road, Shashi District, Hubei, Jingzhou Co-patentee before: JINGZHOU JIAHUA TECHNOLOGY Co.,Ltd. Patentee before: Yangtze University |