CN109825266A - A kind of high inhibition height blocks double guarantor's type drilling fluids and preparation method thereof, drilling composition - Google Patents
A kind of high inhibition height blocks double guarantor's type drilling fluids and preparation method thereof, drilling composition Download PDFInfo
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Abstract
The present invention relates to a kind of high inhibition height to block double guarantor's type drilling fluids and preparation method thereof, drilling composition.The drilling fluid is mainly grouped as by the group of water and following parts by weight: 2~3 parts of bentonite, 0.3~0.5 part of polyacrylamide sylvite, 0.2~0.4 part of polyanion cellulose, 2~3 parts of pre-gelatinized starch, 2~3 parts of emulsified wax, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, 0.1~0.3 part of pH adjusting agent, 0~2 part of heavy weight additive, 1~2 part of landwaste.High inhibition height provided by the invention blocks double guarantor's type drilling fluids, mainly compounded by water, polyacrylamide sylvite, polyanion cellulose, pre-gelatinized starch, emulsified wax, sealing agent, xanthan gum, landwaste, each raw material is shown at lower levels to the good inhibition of brokenness mudstone stratum and seal-off effect, the accidents such as leakage, well slough can be effectively avoided, the safety and success rate of wellbore construction are improved.
Description
Technical field
The invention belongs to drilling fluid fields, and in particular to a kind of high inhibition height blocks double guarantor's type drilling fluids and its preparation side
Method, drilling composition.
Background technique
It is bored in drilling process and meets the generation that brokenness mud stone easily causes the complex situations such as leakage, well slough, processing is difficult
Degree is big, long processing period, be in drilling engineering it is most commonly seen, be most difficult to thoroughly solve the problems, such as.Once hair in broken mud stone pit shaft
Raw leakage, leak stopping processing difficulty is big, and the Free water in mud enters stratum, mud stone suction while being crushed by stress
Water expansion, considerably increases the risk of borehole well instability.Above-mentioned complex situations can be delayed the drillng operation time, extend drilling period,
Huge economic loss is caused, and the solid phase particles (considering to be worth doing including clay, heavy weight additive and jig drill) in mud can be in the oil of reservoir
It is heaped at the narrower throat in gas channel, causing part flow passage to block or be deposited in cell walls makes channel become smaller, pollution
Reservoir reduces oil gas flow.Exploitation is applicable in the drilling fluid of mudstone stratum drilling, and to improving, drilling effect is most important.
Application publication number be CN106221684A patent disclose a kind of anti-collapse strong closure drilling fluid of carbonaceous mudstone and
Preparation method, the drilling fluid by water, liquid phase heavy weight additive, temperature resisting agent, inhibitor, propose stick, fluid loss additive, sealing agent, basicity control
Preparation, lubricant, Solid weighting agents are prepared.It forms in borehole wall surface and seals by building bridge, filling, deform, liquid inhibition effect
Blocking layer has the characteristics that cementing densification, closure are good.
Hard fragile shale is comparatively dense, and hydration swelling is poor, but is rich in microcrack, is easy to produce structure under external force
Property destroy, it is desirable that drilling fluid has stronger seal-off effect.And brokenness Fractures in shale is developed, Free water wraps up easy hydration swelling, removes
Drilling fluid has outside stronger seal-off effect, also has higher requirement, a patent to the ability for inhibiting hydration of mud stone expansion
It is anti-collapse to focus on carbonaceous mudstone, but is inhibiting mud stone water for the anti-collapse strong closure drilling fluid of carbonaceous mudstone disclosed in CN106221684A
Changing expansion aspect has certain shortcoming, and brokenness Fractures in shale is as it can be seen that conventional plugging material is difficult to meet crack filling and want
Ask, it is therefore necessary to carry out a kind of high inhibition for brokenness mud stone, it is high block drilling fluid system research, to adapt to brokenness
The drilling well requirement of mudstone stratum.
Summary of the invention
The purpose of the present invention is to provide a kind of high inhibition height to block double guarantor's type drilling fluids, exists to solve existing drilling fluid
It bores when meeting brokenness mudstone stratum, existing inhibition is poor, plugging effect is not good enough problem.
Second object of the present invention is to provide the preparation method that above-mentioned high inhibition height blocks double guarantor's type drilling fluids.
Third object of the present invention is to provide a kind of double guarantor's type drilling compositions of high inhibition height closure.
To achieve the above object, the technical scheme adopted by the invention is that:
A kind of double guarantor's type drilling fluids of high inhibition height closure, are mainly grouped as by the group of water and following parts by weight: bentonite 2~
3 parts, 0.3~0.5 part of polyacrylamide sylvite, 0.2~0.4 part of polyanion cellulose, 2~3 parts of pre-gelatinized starch, emulsify stone
2~3 parts of wax, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, 0.1~0.3 part of pH adjusting agent, 0~2 part of heavy weight additive, landwaste
1~2 part.
Preferably, above-mentioned high inhibition height blocks double guarantor's type drilling fluids, is grouped as by the group of water and following parts by weight: soda ash
0.1~0.2 part, 2~3 parts of bentonite, 0.3~0.5 part of polyacrylamide sylvite, 0.2~0.4 part of polyanion cellulose, in advance
2~3 parts of gelatinized starch, 2~3 parts of emulsified wax, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, pH adjusting agent 0.1~
0.3 part, 0~2 part of heavy weight additive, 1~2 part of landwaste.
It is further preferred that above-mentioned high inhibition height blocks double guarantor's type drilling fluids, it is grouped as by the group of following parts by weight: water
100 parts, 0.1~0.2 part of soda ash, 2~3 parts of bentonite, 0.3~0.5 part of polyacrylamide sylvite, polyanion cellulose 0.2
~0.4 part, 2~3 parts of pre-gelatinized starch, 2~3 parts of emulsified wax, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, pH tune
0.1~0.3 part of agent, 0~2 part of heavy weight additive, 1~2 part of landwaste of section.
Polyacrylamide sylvite is a kind of polyacrylamide derivative of potassium containing carboxylic in the present invention, has control stratum pulping
Drop dehydration is acted on and had concurrently, improves flow pattern and increases the functions such as lubricity.Pre-gelatinized starch is done on the basis of native starch
Pre-gelatinized primary it is modified, there is good drop dehydration ability on middle-shallow layer stratum.Low with viscosity, rheological characteristic is good, processes work
Skill is simple, environmentally protective, feature at low cost.Pre-gelatinized starch cooperates with use with polyacrylamide sylvite, is not mentioning significantly
Under the premise of high drilling fluid viscosity, the filter loss of drilling fluid can effectively reduce.
Polyanion cellulose is a kind of water-soluble macromolecular organic compound, is disperse easily in all water-base drilling fluids
In, in low solids fluid, polyanion cellulose can significantly reduce filter loss, cake thickness be thinned, and to Shale Hydration
There is stronger inhibiting effect.
Emulsified wax is a kind of non-fluorescence collapse-proof lubricant for being widely used in water-base drilling fluid, with polyanion cellulose
Compatibility has package action.Especially suitable for water sensitivity, hard resistance stratum is anti-collapse and directional well, horizontal well lubrication are anti-sticking.It solves
Horizontal well cutting bed effect is obvious, has good clay dispersion inhibition and stronger Shale Dispersion inhibition.
High inhibition height provided by the invention blocks double guarantor's type drilling fluids, mainly by water, polyacrylamide sylvite, polyanion
Cellulose, pre-gelatinized starch, emulsified wax, sealing agent, xanthan gum, landwaste compound, and pass through tackifier, fluid loss additive, suppression
The synergistic effect of preparation, sealing agent and landwaste quickly can be crushed crack in the borehole wall and fill, and implement effectively to block, and formed and inlayed
Film, other chemical treatments such as barrier Free water enter mudstone stratum, destroy the pressure balance of broken formation sensitivity, retentively
Layer is stablized, and each raw material is shown at lower levels to the good inhibition of brokenness mudstone stratum and seal-off effect, can be effective
The accidents such as leakage, well slough are avoided, the safety and success rate of wellbore construction are improved.
Meanwhile under the comprehensive function of above-mentioned raw materials, drilling fluid of the invention is with density is low, rheological characteristic is good, low dehydration
The characteristics of, rate of penetration can be effectively improved up to 28% or more, fast and safely drilling well is realized, improve drilling efficiency.Reservoir wound
Evil evaluation test shows that drilling fluid permeability resume figure of the invention is high, small to the injury of reservoir, has without difficult to degrade or environment
Evil substance has the characteristics that protect double guarantor's types of reservoir and environment.
Preferably, the polyanion cellulose is that apparent viscosity is not more than the low adhesive aggregation anionic cellulose of 25mPas.
Preferably, the heavy weight additive is calcium carbonate.It is further preferred that the calcium carbonate is that granularity is not less than 325 purposes
Calcium carbonate superfine powder.The pH adjusting agent is alkali.Preferably, the pH adjusting agent is sodium hydroxide.
The landwaste is that drilling area bores the mud stone landwaste for meeting same layer position.Landwaste will be ground into after mud stone landwaste drying
Powder uses.Preferably, the granularity of landwaste powder is 80~100 mesh.The utilization for meeting same layer position mud stone landwaste is bored by offset well, is had and is matched
The advantages of 5 property are good, economy is cheap, easy to use, construction safety, waste utilization, can effectively block brokenness mudstone stratum.
High inhibition height of the invention blocks technical solution used by double guarantor's type drilling compositions:
A kind of double guarantor's type drilling compositions of high inhibition height closure, comprise the following components in parts by weight: 2~3 parts of bentonite, gathering
0.3~0.5 part of acrylamide sylvite, 0.2~0.4 part of polyanion cellulose, 2~3 parts of pre-gelatinized starch, emulsified wax 2~3
Part, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, 0.1~0.3 part of pH adjusting agent, 0~2 part of heavy weight additive, landwaste 1~2
Part.
Preferably, above-mentioned high inhibition height blocks double guarantor's type drilling compositions, is grouped as by the group of following parts by weight: soda ash
0.1~0.2 part, 2~3 parts of bentonite, 0.3~0.5 part of polyacrylamide sylvite, 0.2~0.4 part of polyanion cellulose, in advance
2~3 parts of gelatinized starch, 2~3 parts of emulsified wax, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, pH adjusting agent 0.1~
0.3 part, 0~2 part of heavy weight additive, 1~2 part of landwaste.
Add water to modulate above-mentioned drilling composition, can be prepared by the drilling fluid suitable for brokenness mudstone stratum, both had
The features such as inhibition is good, low dehydration, it is low but also with density, reservoir damage is small, anti-collapse seal-off effect is strong, rheological characteristic is good, landwaste can
The characteristics of secondary use, can effective protection oil-gas Layer, improve leak-proof leak-stopping success rate, improve mechanical separator speed up to 28% or more.
Above-mentioned high inhibition height blocks technical solution used by the preparation method of double guarantor's type drilling fluids:
A kind of high inhibition height blocks the preparation method of double guarantor's type drilling fluids, comprising the following steps:
1) water, soda ash, bentonite are mixed, prepares base slurry；
2) polyacrylamide sylvite, polyanion cellulose, pre-gelatinized starch, emulsified wax, closure is added into base slurry
Agent, xanthan gum, pH adjusting agent, heavy weight additive, landwaste are uniformly mixed to obtain the final product.
It in step 1), is stood in closed container after mixing, obtains the base slurry.The mixing is stirred at 400r/min
Mix 10min.The time of standing is at least for 24 hours.By weight, every 100 parts of water, the additional amount of soda ash are 0.1~0.2 part.
In step 2), the mixing is to stir 2h at 1300r/min.
High inhibition height of the invention blocks the preparation method of double guarantor's type drilling fluids, and simple process is suitable for industrialized production, institute
Obtaining drilling fluid can provide good seal-off effect, borehole wall stability in the strong brokenness mudstone stratum application of environmental sensitivity, especially
It is suitable for low pressure low porosity and low permeability oil-gas reservoirs.The recycling of landwaste alleviates the carrying capacity of environment in drilling process, is conducive to ring
Border protection.
Specific embodiment
Embodiments of the present invention are described further combined with specific embodiments below.In following embodiment: polypropylene
Amide potassium salt is purchased from Fengqiu's the lucky star chemical industry Co., Ltd, model K-PAM.Low adhesive aggregation anionic cellulose is purchased from guarantor
Ding Huarui biology Co., Ltd, model LV-PAC.Pre-gelatinized starch is purchased from Beijing Zhongke Risheng Technology Co., Ltd., model
FDF-1.Emulsified wax is purchased from the emulsified wax of Shijiazhuang Hualai Dingsheng Technology Co., Ltd.'s production, model RS-1.Sealing agent
Purchased from Beijing Hong Qin petroleum assistant Co., Ltd, model DYFT.Xanthan gum is public purchased from Henan Golden Horse petroleum science and technology Limited Liability
Department, model XP-1.Granularity is that the calcium carbonate superfine powder of 325 mesh is purchased from Zhengzhou east auxiliary agent Co., Ltd, model QS-2.Hydrogen-oxygen
Change sodium and is purchased from Xianyang Fenghua mud materials Co., Ltd.
Embodiment 1
The high inhibition height of the present embodiment blocks double guarantor's type drilling fluids, is made of water and drilling composition, specific parts by weight group
Become: 100 parts of water, 0.15 part of soda ash, 3 parts of bentonite, 0.5 part of polyacrylamide sylvite, 0.4 part of polyanion cellulose, in advance
2 parts of gelatinized starch, 2 parts of emulsified wax, 3 parts of sealing agent, 0.05 part of xanthan gum, 0.2 part of sodium hydroxide, 2 parts of landwaste.Landwaste is neighbour
Well bores chance same layer position mud stone landwaste and crushes after 120 DEG C of drying, and granularity is 80~100 mesh.
The high inhibition height of the present embodiment blocks the preparation method of double guarantor's type drilling fluids, using following steps:
1) distilled water 1000g is taken, soda ash 1.5g, sodium bentonite 30g are sequentially added, it is close after stirring 10h at 400r/min
Envelope is stood for 24 hours, obtains base slurry；
2) polyacrylamide sylvite 5g, low adhesive aggregation anionic cellulose 4g, pre- paste are sequentially added into the base of step 1) slurry
Change starch 20g, emulsified wax 20g, sealing agent 30g, landwaste powder 20g, xanthan gum 0.5g, sodium hydroxide 2g, in 1300rpm revolving speed
Lower stirring 2h to obtain the final product.
Embodiment 2
The high inhibition height of the present embodiment blocks double guarantor's type drilling fluids, is made of water and drilling composition, specific parts by weight group
Become: 100 parts of water, 0.15 part of soda ash, 3 parts of bentonite, 0.4 part of polyacrylamide sylvite, 0.3 part of polyanion cellulose, in advance
1.5 parts of gelatinized starch, 1.5 parts of emulsified wax, 2 parts of sealing agent, 0.04 part of xanthan gum, 0.2 part of sodium hydroxide, calcium carbonate superfine powder 2
Part, 1.5 parts of landwaste.Landwaste is that offset well brill chance same layer position mud stone landwaste crushes after 120 DEG C of drying, and granularity is 80~100
Mesh.
The high inhibition height of the present embodiment blocks the preparation method of double guarantor's type drilling fluids, using following steps:
1) distilled water 1000g is taken, soda ash 1.5g, sodium bentonite 30g are sequentially added, it is close after stirring 10h at 400r/min
Envelope is stood for 24 hours, obtains base slurry；
2) polyacrylamide sylvite 4g, low adhesive aggregation anionic cellulose 3g, pre- paste are sequentially added into the base of step 1) slurry
Change starch 15g, emulsified wax 15g, sealing agent 20g, xanthan gum 0.4g, sodium hydroxide 2g, calcium carbonate superfine powder 20g, landwaste powder
15g stirs 2h under 1300rpm revolving speed to obtain the final product.
Test example 1
Embodiment 1 and 2 gained drilling fluid of embodiment are subjected to traditional performance evaluation, detailed programs and detection method referring to state
The regulation for marking " on-the-spot test of GB/T 16783.1-2006 industrial gas oil drilling fluid " carries out, and the results are shown in Table 1.
The traditional performance test result of the drilling fluid of 1 embodiment 1 of table and embodiment 2
By the test result of table 1 it is found that high inhibition height of the invention block double guarantor's type drilling fluid densities can 1.06~
1.15g/cm3It is adjusted in range, basic performance meets requirement of the north of Ordos basin brokenness mud stone to drilling fluid.
Test example 2
The drilling fluid of this test example Example 2 carries out reservoir damage evaluation test.With the bright and beautiful 127 underground stones of Hangjin Banner block
1 layer of higher rock core of position permeability of box group box carries out reservoir damage evaluation experimental at 90 DEG C of temperature, pressure difference 3.5MPa, experiment
As a result as shown in table 2, table 3, table 4.
The physical data of 2 rock core of table
| Rock core number | Length, cm | Diameter, cm | Ka, 10-3μm2 | Porosity, % |
| 2 | 6.00 | 2.50 | 6.43 | 13.38 |
The dynamic filtration measurement result of 3 drilling fluid contamination rock core of table
| Time, min | 1 | 15 | 25 | 35 | 80 | 100 | 120 |
| Filter loss, mL | 0 | 0 | 0.3 | 0.7 | 1.9 | 2.2 | 2.5 |
Permeability resume figure comparison before and after 4 drilling fluid contamination rock core of table
By the test result of 2~table of table 4 it is found that the drilling fluid permeability resume figure of embodiment illustrates this up to 90.51%
Drilling fluid has good reservoir protection effect.
Test example 3
This test example carries out sealing characteristics evaluation to the drilling fluid of embodiment 1 and embodiment 2.
The evaluation of 3.1 40-60 mesh casting bed sealing characteristics
Sealing characteristics evaluation is carried out to 40-60 mesh casting bed with the drilling fluid of embodiment 1 and embodiment 2, as a result such as 5 institute of table
Show.
The 40-60 mesh sand-bed filtration result of the drilling fluid of 5 embodiment 1 of table and embodiment 2
By the test result of table 5 it is found that the drilling fluid of 2 two kinds of density of embodiment 1 and embodiment has the small duct of 40-60 mesh
Good plugging action, 60min filter loss be less than 5mL, drilling fluid after the exacerbation of embodiment 2, sealing characteristics is more preferable, 60min
Drilling fluid Sand bed filtration is 0mL；Casting bed infiltration fluid loss 30min is respectively less than 2mL, illustrates that outer mud cake is fine and close, permeability is low.
The evaluation of 3.2 20-40 mesh casting bed sealing characteristics
Sealing characteristics evaluation is carried out to 20-40 mesh casting bed with the drilling fluid of embodiment 1 and embodiment 2, as a result such as 6 institute of table
Show.
The 20-40 mesh sand-bed filtration result of the drilling fluid of 6 embodiment 1 of table and embodiment 2
By the test result of table 6 it is found that drilling fluid there is good block to make 20-40 mesh casting bed after the exacerbation of embodiment 2
It is less than 7mL with, 60min drilling fluid Sand bed filtration, the non-weighted drilling fluid of embodiment 1 is since solid concentration is relatively fewer, just
Beginning Sand bed filtration is larger, after forming fine and close mud cake later, drilling fluid and indifference after fluid loss rate and exacerbation；30min clear water
Casting bed infiltration fluid loss is respectively less than 3mL, illustrates that being formed by mud cake also when blocking 20-40 mesh casting bed has densification, permeability low
The characteristics of.
3.3 permeability block filter loss evaluation
The drilling fluid of Example 2 carries out PPT according to method as defined in GB/T 29170-2012 and blocks experiment, as a result such as
Shown in table 7.
Plugging effect evaluation of the drilling fluid of 7 embodiment 2 of table to different ceramic filter discs
By the test result of table 7 it is found that the drilling fluid of embodiment 2 is good to the ceramic disk plugging effect of different permeabilities,
The permeability PPT filter loss of 60min is respectively 7.2mL, 6.4mL, can reach the requirement of closure.
Test example 4
This test example carries out inhibition test evaluation with the drilling fluid of embodiment 2, and the results are shown in Table 8.
The rejection evaluation result of the drilling fluid of 8 embodiment 2 of table
The test result of table 8 shows the recycling of the drilling fluid system of embodiment 2 to the landwaste of Liu family's ditch group, the peak Shi Qian group
It is respectively 6.57%, 5.40% that rate, which respectively reaches the expansion rate after 90.5%, 89.63%, 16h, illustrates the drilling fluid system pair
The brokenness mudstone stratum of the peak Liu Jiagou, Shi Qian group has good inhibiting effect.
Test example 5
North of Ordos basin Hangjin Banner block belongs to the low hole gas field of low pressure and low permeability, due to by tectonic movement
It influences, the peak Liu Jiagou, Shi Qian group mud stone is cementing broken, and drilling process middle and upper part well section Liu man ditch group, the peak Shi Qian group are frequent occurrence
The leakage of the mistake property returned, not only influences being normally carried out for drillng operation, but also often derive other kinds of down hole problem,
It may cause well slough, bit freezing even wellbore when serious and the serious accidents such as scrap, seriously restrict the exploration and development of Hangjin Banner block
Progress.
In JPH-307 well, double guarantor's type drilling fluids are blocked using the high inhibition height of embodiment 1, start level Four solid control equipment, from
400m is drilled into shaft bottom 4397m, segment length 3997m, drills the peak Liu Jiagou, Shi Qian group, rise time method, lower Shihezi Formation, wherein under
1 section of Shihezi Formation box 1200 meters of horizontal segment length, drilling fluid specific gravity control is in 1.06-1.20g/cm3, well does not occur in drilling process
The borehole well instabilities situation such as leakage, blocked portion, rate of penetration 8.75m/h, drilling period 51.96d are improved compared with adjacent area average rate of penetration
23.87%.
In practical engineering applications, effect is obvious in terms of improving rate of penetration for drilling fluid system of the invention, leakage hair
Raw rate is zero, and fast and safely drilling well is realized in drilling process, good to the protecting effect of environment and oil-gas Layer, in brokenness mud
The application effect on rock stratum is very significant.
Claims (10)
1. a kind of high inhibition height blocks double guarantor's type drilling fluids, which is characterized in that be mainly grouped as by the group of water and following parts by weight:
2~3 parts of bentonite, 0.3~0.5 part of polyacrylamide sylvite, 0.2~0.4 part of polyanion cellulose, pre-gelatinized starch 2~3
Part, 2~3 parts of emulsified wax, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, 0.1~0.3 part of pH adjusting agent, heavy weight additive 0
~2 parts, 1~2 part of landwaste.
2. high inhibition height as described in claim 1 blocks double guarantor's type drilling fluids, which is characterized in that by water and following parts by weight
Group is grouped as: 0.1~0.2 part of soda ash, 2~3 parts of bentonite, and 0.3~0.5 part of polyacrylamide sylvite, polyanion cellulose
0.2~0.4 part, 2~3 parts of pre-gelatinized starch, 2~3 parts of emulsified wax, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, pH
0.1~0.3 part of regulator, 0~2 part of heavy weight additive, 1~2 part of landwaste.
3. high inhibition height as described in claim 1 blocks double guarantor's type drilling fluids, which is characterized in that the heavy weight additive is carbonic acid
Calcium.
4. high inhibition height as described in claim 1 blocks double guarantor's type drilling fluids, which is characterized in that the pH adjusting agent is hydrogen-oxygen
Change sodium.
5. high inhibition height as described in claim 1 blocks double guarantor's type drilling fluids, which is characterized in that the landwaste is drilling area
Bore the mud stone landwaste for meeting same layer position.
6. high inhibition height as claimed in claim 5 blocks double guarantor's type drilling fluids, which is characterized in that dry the mud stone landwaste
After be ground into landwaste powder use.
7. a kind of high inhibition height blocks double guarantor's type drilling compositions, which is characterized in that comprise the following components in parts by weight: bentonite
2~3 parts, 0.3~0.5 part of polyacrylamide sylvite, 0.2~0.4 part of polyanion cellulose, 2~3 parts of pre-gelatinized starch, cream
2~3 parts of fossil waxes, 2~3 parts of sealing agent, 0.04~0.06 part of xanthan gum, 0.1~0.3 part of pH adjusting agent, 0~2 part of heavy weight additive,
1~2 part of landwaste.
8. the preparation method that a kind of high inhibition height as described in claim 1 blocks double guarantor's type drilling fluids, which is characterized in that including
Following steps:
1) water, soda ash, bentonite are mixed, prepares base slurry；
2) polyacrylamide sylvite, polyanion cellulose, pre-gelatinized starch, emulsified wax, sealing agent, Huang is added into base slurry
Virgin rubber, pH adjusting agent, heavy weight additive, landwaste are uniformly mixed to obtain the final product.
9. the preparation method that high inhibition height as claimed in claim 8 blocks double guarantor's type drilling fluids, which is characterized in that step 1)
In, it is stood in closed container after mixing, obtains the base slurry.
10. the preparation method that high inhibition height as claimed in claim 9 blocks double guarantor's type drilling fluids, which is characterized in that standing
Time is at least for 24 hours.
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| CN110951471A (en) * | 2019-12-20 | 2020-04-03 | 山东华越天成石油技术有限责任公司 | Coagulation plugging slurry |
| CN111577197A (en) * | 2020-05-28 | 2020-08-25 | 中国石油集团渤海钻探工程有限公司 | Quick plugging method suitable for temperature of lost stratum being more than or equal to 80 DEG C |
| CN113583639A (en) * | 2020-04-30 | 2021-11-02 | 中国石油天然气股份有限公司 | Drilling fluid system for deep well drilling and preparation method thereof |
| CN113698918A (en) * | 2020-05-23 | 2021-11-26 | 中石化石油工程技术服务有限公司 | Resource utilization method for rock debris of synthetic base drilling fluid |
| CN115247054A (en) * | 2021-04-27 | 2022-10-28 | 中国石油天然气集团有限公司 | Water-based drilling fluid and preparation method thereof |
| CN116063992A (en) * | 2021-11-03 | 2023-05-05 | 中石化石油工程技术服务有限公司 | Plugging composition utilizing oil-based drilling cuttings and application method thereof |
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