CN107603574A - A kind of drilling water base sealing agent and its application method - Google Patents
A kind of drilling water base sealing agent and its application method Download PDFInfo
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- CN107603574A CN107603574A CN201710941782.2A CN201710941782A CN107603574A CN 107603574 A CN107603574 A CN 107603574A CN 201710941782 A CN201710941782 A CN 201710941782A CN 107603574 A CN107603574 A CN 107603574A
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Abstract
The invention discloses a kind of drilling water base sealing agent and its application method, the sealing agent use mass ratio for（17~25）：（7~15）：（17~27）：（30~37）Curing materials, packing material, bridging materials and suspension material proportioning form, the leak-off time is less than 15s, moment leak-off forms filter cake, the wastage of loss circulation material and drilling fluid can be reduced, it is a kind of high efficient plugging agent for integrating high dehydration, high intensity and high acid-soluble ratio, in the case of use of being arranged in pairs or groups in proportion with clear water, mud system, cement etc., is applicable to any type of leakage, it is especially optimal to the big leakage of pressurization sealing and small fractures, using effect.
Description
Technical field
The present invention is a kind of drilling water base sealing agent and its application method, and in particular to coordinates drilling water base mud to make
Sealing agent and its application method, belong to petroleum industry bored material field.
Background technology
Leakage refers to the various working solutions in the underground work such as drilling well, well cementation, test or well workover（Including drilling fluid, cement
Slurry, completion fluid and other fluids etc.）A kind of down hole problem on stratum is directly entered under differential pressure action.In drilling well work
Generation leakage can cause operation to pause or interrupt, and serious leakage will then affect the longer production time adversely, not only result in a large amount of
The consuming of human and material resources and financial resources, it is also possible to trigger the security incidents such as well slough, blowout and bit freezing, therefore, in drilling process
Leakage phenomenon timely and effectively handles extremely important.It is known that leakage includes permeability leak-off, Fractured leak-off, solution cavity
Leak-off, because the crack in the case of different leakages is different, the pressure of its pressurization sealing is different.Existing high dehydration sealing agent-bridge joint
Material-cementitious composite leak stopping method, it is made into higher filter loss and coagulates with cement using high dehydration sealing agent and bridge material
The leak stopping slurries of knot property, can disengage moisture rapidly under differential pressure action, after being squeezed, volume-diminished, density increase, bridging material
Due to dehydration in lost-circulation zone, skeleton is formed quickly in leakage channel, cement solidifies bridging material compared with labor under well temperature
Fixation, the partition wall formed with some strength, prevent drilling fluid leakage.
Conventional loss circulation material can seal the less crack of size, and universal bearing capacity is such as missed seriously, generally existed than relatively low
Increase the ratio of for example high dehydration sealing agent of bridging material, walnut shell, clam shell ground-slag etc., but the pressure-bearing energy of its raising in leak stopping slurries
Power is limited.Existing patent CN102443383（A kind of high dehydration, it is hardenable, into plug sealing agent, 2012.05.09）Disclose one
Kind is by curing materials（Gypsum, cement, blast-furnace cinder, sodium phosphate）, compound leakage stop agent（Particle shell, mica, cotton seed hulls）, high lose
Water material（Diatomite or flyash）, elastic expansion material（Overlay film water sucting rubber, overlay film water-absorbing resin）, fibrous material（Poly- third
Alkene nitrile fiber）The sealing agent of composition.Hardening time can reach 6~10h, and the compression strength at 50 DEG C after water-bath maintenance 48h is reachable
To 20MPa, for a diameter of 2.5cm, length is that 8.0cm cores carry out closure experiment, at 50 DEG C after water-bath maintenance 48h, clear water
Drill core permeability rate is surveyed more than 96%.
Existing patent document CN102977866A（One kind closure crack solidifies sealing agent, 2013.03.20 with high dehydration）It is public
One kind has been opened by material of main part（One or more in calcium oxide, magnesia, aluminum oxide, silica）, filter aid（Carbonic acid
Calcium）, curing agent（One or more in magnesium sulfite, sodium sulfite, sodium hypophosphite）, fibrous material（Wood chip and/or paper scrap）
And bridging materials（Walnut shell, mica, the mixture of rubber granule）The sealing agent of composition.Meet high fluid loss characteristics, a leak-off time 45s left sides
The right side, filter loss is in 210ml or so；Filter cake 24h intensity is 1.6kg/cm（16MPa）；Acid-soluble ratio 83.4%.
Existing patent document CN105969327A（A kind of loss circulation material and leak stopping slurry for protecting low pressure fracture-type reservoir,
2016.09.28）Disclose it is a kind of by walnut shell, compound leakage stop agent, drill-feeding plugging agent, the molten sealing agent of acid, high dehydration sealing agent,
The sour molten loss circulation material of calcium oxide composition.Loss circulation material enters 4 mm seam plates, and pressure-bearing reaches 6MPa after blocking time 6S；Leak stopping material
Material enters 5 mm seam plates, and pressure-bearing reaches 6MPa after blocking time 20S；Leak stopping slurry acid-soluble ratio is 81.76.
The content of the invention
It is an object of the invention to provide a kind of drilling water base sealing agent, using curing materials, packing material, bridge formation material
Material and suspension material proportioning form, and the leak-off time is less than 15s, and moment leak-off forms filter cake, can reduce loss circulation material and drilling well
The wastage of liquid, it is a kind of high efficient plugging agent for integrating high dehydration, high intensity and high acid-soluble ratio.
Another object of the present invention is to provide a kind of method with drilling water base sealing agent leak stopping, with clear water, mud
Slurry system, cement etc. are arranged in pairs or groups in the case of use in proportion, suitable for any type of leakage, especially to pressurization sealing and medium and small
The big leakage in crack, using effect are optimal.
The present invention is achieved through the following technical solutions：A kind of drilling water base sealing agent, the sealing agent include quality
Than for（17~25）：（7~15）：（17~27）：（30~37）Curing materials, packing material, bridging materials and suspension material,
The curing materials are selected from lime stone, the mixture of one or both of cement composition, the packing material be selected from diatomite,
The mixture of one or more compositions in attapulgite, vermiculite, it is fine that the bridging materials are selected from paper scrap, straw, bamboo scraps, cotton
The mixture of one or more compositions in dimension, corncob, coconut shell powder；It is fine that the suspension material is selected from cellulose modified crystallite
Dimension.
Cellulose modified microcrystalline cellulose can use dilute concentration monoxone that cotton fiber is starched into carboxy methylation back end hydrogenation sodium oxide molybdena and adjust pH
Value washs its salinity to neutrality, then through ethanol, is made by spray drying.
The curing materials are selected from lime stone and cement, and in curing materials, the mass ratio of lime stone and cement is（12~
15）：（5~10）.
The packing material is selected from diatomite and attapulgite, in packing material, the mass ratio of diatomite and attapulgite
For（5~10）：（2~5）.
The bridging materials are selected from paper scrap, stalk and bamboo scraps, and in bridging materials, the mass ratio of paper scrap, stalk and bamboo scraps is
（5~10）：（7~10）：（5~7）.
A kind of method with drilling water base sealing agent leak stopping, including situations below：
（1）Fracture void<3mm, breakthrough rate<5m3During/h, sealing agent described in 2~3% claims 1 is added in mud system
Used as drill-feeding plugging agent；
（2）Fracture void<3mm、5m3/ h≤breakthrough rate≤30m3During/h, by mass percentage, by 70~85% clear water and
Sealing agent described in 15~30% claims 1 is configured to leak stopping slurries and carries out leak stopping；
（3）Fracture void >=3mm, 30m3/ h≤breakthrough rate<60m3During/h, by mass percentage, by 53~72% clear water,
Sealing agent, 2~4% walnut shells, 1~3% mica described in 25~40% claims 1 are configured to leak stopping slurries and carry out leak stopping；
（4）Fracture void >=3mm, breakthrough rate >=60m3, by mass percentage, will by 25~40% rights when/h or mistake are returned
1 sealing agent and 5~25% cement production systD leak stopping slurries are asked to carry out leak stopping.
The present invention compared with prior art, has advantages below and beneficial effect：
（1）The present invention use mass ratio for（5~10）：（2~5）Diatomite and attapulgite as in packing material, play
Filling and the effect of drainage, make sealing agent have the characteristic of quick dehydration and high filter loss, are filtered by " test procedure for drilling fluids "
The method of testing of vector, using directly read filtered the time reflection filtration rate understand, sealing agent can be filtered completely in 15s
Lose.
（2）The present invention use mass ratio for（17~25）：（7~15）：（17~27）：（30~37）Curing materials, fill out
Fill material, bridging materials and suspension material and sealing agent is made, the leak stopping slurries configured with the sealing agent, the energy in the presence of pressure difference
Quick dehydration, formation have certain initial strength（Initial more than pressure-bearing 4mPas）Filter cake and leak stopping layer.
（3）In the present invention, the mass ratio of lime stone and cement in curing materials is controlled to be（12~15）：（5~10）, not only
Filter cake intensity, which can be improved, can also increase the acid-soluble ratio of filter cake, and the leak stopping slurries configured with the sealing agent enter stratum leak-off passage
Afterwards, in the presence of the gentle pressure difference in ground, it can quickly form filter cake and gradually solidify, the more existing loss circulation material of bearing capacity is significantly
Improve, 24 hours up to 20MPa even more highs；Filter cake acid-soluble ratio can reach more than 80%, be advantageous to protect payzone, after closure
Return to tell and be used cooperatively with conventional loss circulation material, the dual effect for reducing mud wastage and improving drop ply bearing capacity can be reached
Fruit.
（4）In the present invention, suspension material selects cellulose modified microcrystalline cellulose, has the function that to suspend and conformal, easy shape
Into filter cake, increase filter cake intensity.
（5）In the present invention, bridging materials select mass ratio for（5~10）：（7~10）：（5~7）Paper scrap, stalk and bamboo
Bits, have the function that drainage, bridge joint and closure.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 17：7：17：30 proportionings form, wherein, curing materials are selected from lime stone, and packing material is selected from diatom
Soil, bridging materials are selected from the mixture that paper scrap and straw form, and suspension material is selected from cellulose modified microcrystalline cellulose.
Embodiment 2：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 25：15：27：37 proportionings form, wherein, curing materials are selected from cement, and packing material is selected from diatom
The mixture of soil, attapulgite and vermiculite composition, bridging materials are selected from the mixture of paper scrap, bamboo scraps and corncob composition, suspended
Material is selected from cellulose modified microcrystalline cellulose.
Embodiment 3：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 18：12：27：32 proportionings form, wherein, curing materials are selected from lime stone and cement, curing materials
In, the mass ratio of lime stone and cement is 12：5, packing material is selected from the mixture that diatomite and vermiculite form, bridging materials choosing
From the mixture of straw, bamboo scraps, cotton fiber, corncob and coconut shell powder composition, it is fine that suspension material is selected from cellulose modified crystallite
Dimension.
Embodiment 4：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 22：10：19：35 proportionings form, wherein, curing materials are selected from lime stone and cement, curing materials
In, the mass ratio of lime stone and cement is 15：10, packing material is selected from the mixture of diatomite, attapulgite and vermiculite composition,
Bridging materials are selected from cotton fiber, and suspension material is selected from cellulose modified microcrystalline cellulose.
Embodiment 5：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 21：14：25：37 proportionings form, wherein, curing materials are selected from lime stone and cement, curing materials
In, the mass ratio of lime stone and cement is 14：9, packing material is selected from diatomite and attapulgite, in packing material, diatomite
Mass ratio with attapulgite is 5：2, bridging materials are selected from straw, and suspension material is selected from cellulose modified microcrystalline cellulose.
Embodiment 6：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 25：13：26：30 proportionings form, wherein, curing materials are selected from lime stone and cement, curing materials
In, the mass ratio of lime stone and cement is 13：5, packing material is selected from diatomite and attapulgite, in packing material, diatomite
Mass ratio with attapulgite is 10：3, bridging materials are selected from the mixture of paper scrap, straw and coconut shell powder composition, suspension material
Selected from cellulose modified microcrystalline cellulose.
Embodiment 7：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 20：10：25：36 proportionings form, wherein, curing materials are selected from lime stone and cement, curing materials
In, the mass ratio of lime stone and cement is 13：8, packing material is selected from diatomite and attapulgite, in packing material, diatomite
Mass ratio with attapulgite is 7：5, bridging materials are selected from paper scrap, stalk and bamboo scraps, in bridging materials, paper scrap, stalk and bamboo
The mass ratio of bits is 5：7：7, suspension material is selected from cellulose modified microcrystalline cellulose.
Embodiment 8：
The present embodiment proposes a kind of drilling water base sealing agent, and the sealing agent is using curing materials, packing material, bridging materials
With suspension material in mass ratio 19：15：21：35 proportionings form, wherein, curing materials are selected from lime stone and cement, curing materials
In, the mass ratio of lime stone and cement is 13：6, packing material is selected from diatomite and attapulgite, in packing material, diatomite
Mass ratio with attapulgite is 8：3, bridging materials are selected from paper scrap, stalk and bamboo scraps, in bridging materials, paper scrap, stalk and bamboo
The mass ratio of bits is 10：10：5, suspension material is selected from cellulose modified microcrystalline cellulose.
The sealing agent that above-described embodiment 1~8 is related to carries out plugging effect evaluation：
5~8% bridge material is mixed into the pure leak stopping slurries of embodiment 1~8 respectively（Based on walnut shell, mica）,
Closure experiment is carried out on the seam plate wide for 1~5mm, its performance is as shown in table 1：
Table 1
Embodiment 9：
The present embodiment proposes a kind of method of drilling water base sealing agent leak stopping, and in the present embodiment, sealing agent is using solidification material
Material, packing material, bridging materials and suspension material in mass ratio 20：8：18：35 proportionings form, wherein, curing materials are selected from stone
Lime stone and cement, in curing materials, the mass ratio of lime stone and cement is 12：7, packing material is selected from diatomite and concave convex rod
Stone, in packing material, the mass ratio of diatomite and attapulgite is 9：2, bridging materials are selected from paper scrap, stalk and bamboo scraps, build bridge
In material, the mass ratio of paper scrap, stalk and bamboo scraps is 8：7：6, suspension material is selected from cellulose modified microcrystalline cellulose.
In use, it is directed to fracture void<3mm, breakthrough rate<5m3/ h situation, be separately added into 2% in mud system,
2.5%th, 3% above-mentioned sealing agent uses as drill-feeding plugging agent, and service condition compares as shown in table 2 three times：
Table 2
Embodiment 10：
The present embodiment proposes a kind of method of drilling water base sealing agent leak stopping, and in the present embodiment, sealing agent is using solidification material
Material, packing material, bridging materials and suspension material in mass ratio 25：9：25：35 proportionings form, wherein, curing materials are selected from stone
Lime stone and cement, in curing materials, the mass ratio of lime stone and cement is 13：8, packing material is selected from diatomite and concave convex rod
Stone, in packing material, the mass ratio of diatomite and attapulgite is 10：3, bridging materials are selected from paper scrap, stalk and bamboo scraps, build bridge
In material, the mass ratio of paper scrap, stalk and bamboo scraps is 6：8：5, suspension material is selected from cellulose modified microcrystalline cellulose.
In use, it is directed to fracture void<3mm、5m3The m of/h≤breakthrough rate≤303/ h situation, by mass percentage,
Will in clear water add 15% above-mentioned sealing agent be configured to leak stopping slurries A, in clear water add 20% above-mentioned sealing agent be configured to leak stopping
Slurries B, 30% above-mentioned sealing agent of addition is configured to leak stopping slurries C progress leak stopping in clear water, and leak stopping situation compares as shown in table 3：
Table 3
Embodiment 11：
The present embodiment proposes a kind of method of drilling water base sealing agent leak stopping, and in the present embodiment, sealing agent is using solidification material
Material, packing material, bridging materials and suspension material in mass ratio 20：10：17：35 proportionings form, wherein, curing materials are selected from stone
Lime stone and cement, in curing materials, the mass ratio of lime stone and cement is 12：8, packing material is selected from diatomite and concave convex rod
Stone, in packing material, the mass ratio of diatomite and attapulgite is 8：5, bridging materials are selected from paper scrap, stalk and bamboo scraps, build bridge
In material, the mass ratio of paper scrap, stalk and bamboo scraps is 6：8：5, suspension material is selected from cellulose modified microcrystalline cellulose.
In use, it is directed to fracture void >=3mm, 30m3/ h≤breakthrough rate<60m3/ h situation, by mass percentage,
25% above-mentioned sealing agent of addition, 2% walnut shell, 1% mica are configured to leak stopping slurries A in clear water, addition 20% is above-mentioned in clear water
Sealing agent, 3% walnut shell, 2% mica are configured to leak stopping slurries B, 15% above-mentioned sealing agent, 4% walnut shell, 3% cloud are added in clear water
Mother is configured to leak stopping slurries C and carries out leak stopping, and leak stopping situation compares as shown in table 4：
Table 4
Embodiment 12：
The present embodiment is related to drilling water base sealing agent in Tarim, Xinjiang oil field well in front of the mountains（Big Bei103Jing application：
" drill bit is drilled into well depth 3461m to big Bei103Jing with 12 1/4（Layer position：Storehouse car group）When, leakage occurs, leaks fast 165m3/ h,
Leak stopping is carried out with bridge slurry, is once succeeded.But drilling well is missed two days later again, will particularly be leaked per round trip
Lose, it is front and rear to starch leak stopping more than ten times, 165 m of maximum leakage speed with bridge3/ h, 80 m of minimum3/ h, circulation problems fail to obtain thoroughly all the time
Solve.
Draw a conclusion by analysis later：This drop ply of one is not a little but one section（2400m-2700m）；The second is with
When bridge starches leak stopping, concentration is low, and particle size is small, and plugging effect is bad, and when concentration is high, particle size is big to be caused " to seal up a door " again,
The shortcomings of its own tells without intensity, easy time along with the leak stopping of bridge slurry, so, R-19 sealing agents are used in decision（Blocked up i.e. described in embodiment 8
Leak agent）Carry out leak stopping.
First time leak stopping is not because cleaning slurry tank and aggravating pump line line, and leak stopping slurry is by mud contamination, during construction, drilling tool quilt
It is stifled, leak stopping failure；Second successful with the leak stopping of R-19 sealing agents, drilling well always to setting of casing well depth, and its formula is：
1. with bridge slurry 10m3：The thin cotton seed hull of walnut shell+1%+3%SQD-98 of thick walnut shell+8% in well slurry+2%；
2. starched with leak stopping：Clear water 40m3+ 30%R-19 is weighed out to well pulp density（1.40g/cm3）.
Construction method：Lower polish drill rod first injects bridge slurry 5.5m to 2604 meters of well depth3, build bridge and reach its purpose is to rise
To the flow resistance of increase drop ply, it is then poured into R-19 leak stopping and starches 30 m3, well head, which is shown in, to be returned, for the m of mud 29.53, rise and be drilled into well depth
2055m, closing well squeeze into the m of mud 153, 3MPa is pumped, 2.1MPa is down to after termination of pumping, after closing well waits stifled 6h, lower bore that drive a well circulates nothing
Leakage, recovers normal drilling well.
Embodiment 13：
The present embodiment is related to drilling water base sealing agent in Tarim, Xinjiang oil field well in front of the mountains（Big Bei102Jing application：
Big Bei102Jing is 1.79g/cm with density3DWM to well depth 4749m, into salt deposit at the top of, it is desirable to pressure-bearing equivalent
Density reaches 2.25-2.30g/cm3。
Bridge slurry 100m of the first time pressurization sealing with 20% concentration3Carry out pressurization sealing, stratum pressure-bearing equal yield density by
1.79g/cm3↗2.04g/cm3, success.
Second of pressurization sealing, prepare to improve pressure-bearing equal yield density to 2.25g/cm3, it is 2.04 g/cm with density3It is dense
Spend and starch 100m for 16% bridge3, leak stopping failure.
Third time pressurization sealing, prepare density 2.08g/cm3, concentration is that 13% bridge starches 46m3, pressurization sealing failure.
By pressurization sealing three times, more than ten days time is lost, but found out leakage well section substantially（4400-4500m）, by
Use R-19 sealing agents（Sealing agent i.e. described in embodiment 7）Leak stopping is carried out, is once succeeded.By stratum pressure-bearing equal yield density carry to
2.25g/cm3More than, recover drilling well quickly, smooth drill-through saline bed.Specific construction situation is as follows：
1. preparation
(1) 1 slurry tank is cleaned out with clear water（40m3）And aggravate pump line line；
(2) polish drill rod is descended to well depth 4400m；
(3) with leak stopping slurry 30m3, formula：The R-19+ of clear water+20% is weighed out to 2.10g/cm3。
2. construction technology：
(1) current well depth 4751m, deep 4400m under drilling tool（Pipe shoe depth 3646.5m）；
(2) before connecing kelly bar, drilling tool and annular space are filled into mud；
(3) leak stopping slurry 25m is beaten3, for mud 22m3（Stay 200m wells slurry+leak stopping slurry in drilling tool bottom）；
(4) annular preventer, again into drilling tool for well slurry 28m3, replace altogether into the m of mud amount 503（4400m drilling tool internal volumes
50.87 m3）, squeeze for during leak stopping slurry, turn down annular preventer 5~6MPa of MP, and it is up and down in drilling rod body
Drilling tool, prevent viscous card, the vertical pressure of construction period control<10 MPa, according to vertical pressure size, adjust discharge capacity.Generally 30~40 punchings/
Point.
(5) drive a well, rise and be drilled into casing shoe, because in whole work progress all in leakage state, also no pressure after termination of pumping, institute
With, sprained pressure without closing well, wait it is lower after stifled 20h bore circulation and do not leak, pressurization sealing success.
Embodiment 14：
The present embodiment is related to drilling water base sealing agent in Sichuan Yibin Gongxian County shale gas horizontal well（YS108 H5-4 wells）Should
With：
Two open 12 1/4, and " drilling well occurs leakage mistake to well depth 1628.6m and returned（Miss mud density 1.27）, successively 2 times it is stifled with boring
Leakage, the common bridge of 3 various concentrations are starched（Conventional loss circulation material, such as loss circulation materials such as walnut shell, cotton seed hulls, sawdusts）With 3 water
The multiple leak stopping of the methods of mud leak stopping, more than ten days time of loss are not up to leak stopping purpose；
Finally select R-19 sealing agents（Sealing agent i.e. described in embodiment 6）Plugging operations are carried out, it is formulated：Clear water+27%R-19+
1% walnut shell（Carefully）+ 1.27 are weighed out to, replace into 13m3Into drop ply, pressure of being sprained after static 8 hours 4.5Mpa, no leakage is circulated, is blocked up
Leak successfully, recover drilling well.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
Any simply modification, the equivalent variations made according to the technical spirit of the present invention to above example, each fall within the protection of the present invention
Within the scope of.
Claims (5)
- A kind of 1. drilling water base sealing agent, it is characterised in that：The sealing agent includes mass ratio（17~25）：（7~ 15）：（17~27）：（30~37）Curing materials, packing material, bridging materials and suspension material, the curing materials are selected from The mixture of one or both of lime stone, cement composition, the packing material is in diatomite, attapulgite, vermiculite One or more compositions mixtures, the bridging materials are selected from paper scrap, straw, bamboo scraps, cotton fiber, corncob, cocoanut shell The mixture of one or more compositions in powder；The suspension material is selected from cellulose modified microcrystalline cellulose.
- A kind of 2. drilling water base sealing agent according to claim 1, it is characterised in that：The curing materials are selected from lime Stone and cement, in curing materials, the mass ratio of lime stone and cement is（12~15）：（5~10）.
- A kind of 3. drilling water base sealing agent according to claim 1, it is characterised in that：The packing material is selected from diatom Soil and attapulgite, in packing material, the mass ratio of diatomite and attapulgite is（5~10）：（2~5）.
- A kind of 4. drilling water base sealing agent according to claim 1, it is characterised in that：The bridging materials are selected from paper Bits, stalk and bamboo scraps, in bridging materials, the mass ratio of paper scrap, stalk and bamboo scraps is（5~10）：（7~10）：（5~7）.
- A kind of 5. method with drilling water base sealing agent leak stopping, it is characterised in that：Including situations below：（1）Fracture void<3mm, breakthrough rate<5m3During/h, sealing agent described in 2~3% claims 1 is added in mud system Used as drill-feeding plugging agent；（2）Fracture void<3mm、5m3/ h≤breakthrough rate≤30m3During/h, by mass percentage, by 70~85% clear water and 15 Sealing agent described in~30% claim 1 is configured to leak stopping slurries and carries out leak stopping；（3）Fracture void >=3mm, 30m3/ h≤breakthrough rate<60m3During/h, by mass percentage, by 53~72% clear water, 25 Sealing agent, 2~4% walnut shells, 1~3% mica described in~40% claim 1 are configured to leak stopping slurries and carry out leak stopping；（4）Fracture void >=3mm, breakthrough rate >=60m3When/h or mistake are returned, by mass percentage, by 25~40% claims 1 sealing agent and 5~25% cement production systD leak stopping slurries carry out leak stopping.
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| CN109294537A (en) * | 2018-11-19 | 2019-02-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of leak stopping slurry and blocking method |
| CN109852356A (en) * | 2019-01-15 | 2019-06-07 | 古莱特科技股份有限公司 | A kind of closure oil/gas well formation channels compound leakage stop agent |
| CN111196918A (en) * | 2018-11-16 | 2020-05-26 | 中国石油天然气股份有限公司 | Oil layer protective agent for drilling fluid and preparation method thereof |
| CN112209678A (en) * | 2020-09-29 | 2021-01-12 | 中曼石油天然气集团股份有限公司 | Drilling fluid rapid dehydration pressure-bearing plugging agent, preparation method thereof and pressure-bearing plugging slurry |
| CN113863892A (en) * | 2021-10-28 | 2021-12-31 | 四川省地质矿产勘查开发局四0三地质队 | Drilling leak-stopping small ball and preparation method thereof |
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| CN113863892B (en) * | 2021-10-28 | 2023-02-24 | 四川省地质矿产勘查开发局四0三地质队 | Drilling leak-stopping small ball and preparation method thereof |
| CN114045160A (en) * | 2021-11-25 | 2022-02-15 | 沙克(天津)石油技术服务有限公司 | Fast water loss plunger type plugging agent for drilling fluid and preparation method thereof |
| CN114045160B (en) * | 2021-11-25 | 2023-08-22 | 沙克(天津)石油技术服务有限公司 | Quick water loss plunger type plugging agent for drilling fluid and preparation method thereof |
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