CN116905988B - Drilling method for preventing drilling fluid from invading - Google Patents
Drilling method for preventing drilling fluid from invading Download PDFInfo
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- CN116905988B CN116905988B CN202311163920.0A CN202311163920A CN116905988B CN 116905988 B CN116905988 B CN 116905988B CN 202311163920 A CN202311163920 A CN 202311163920A CN 116905988 B CN116905988 B CN 116905988B
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- 238000005553 drilling Methods 0.000 title claims abstract description 182
- 239000012530 fluid Substances 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000003112 inhibitor Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 239000000706 filtrate Substances 0.000 claims abstract description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 8
- 230000001050 lubricating effect Effects 0.000 claims abstract description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims abstract description 4
- 230000001502 supplementing effect Effects 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 12
- -1 modified alkyl silicon Chemical compound 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000000314 lubricant Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 150000003863 ammonium salts Chemical class 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 230000009545 invasion Effects 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 6
- 229920001568 phenolic resin Polymers 0.000 claims description 6
- 239000005011 phenolic resin Substances 0.000 claims description 6
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 5
- 239000010428 baryte Substances 0.000 claims description 5
- 229910052601 baryte Inorganic materials 0.000 claims description 5
- 230000036571 hydration Effects 0.000 claims description 5
- 238000006703 hydration reaction Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000004537 pulping Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 230000000887 hydrating effect Effects 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000012752 auxiliary agent Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000002981 blocking agent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009965 tatting Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
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- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The application discloses a drilling method for preventing drilling fluid from invading, which comprises the following steps: preparing pre-hydrated soil slurry for standby; drilling with clear water, and then using drilling fluid containing embedded shielding inhibitor; after drilling a well section, replacing the well drilling fluid with the adjusted viscosity of 50-60 s in the well bore; step two, a well opening section: drilling fluid system configuration: drilling a cement plug by using a drilling fluid at a well section, releasing the drilling fluid polluted by the cement plug after drilling, adding sodium carbonate and an anti-pollution agent to treat the residual drilling fluid, and supplementing clean water for full circulation; adding auxiliary agents such as a mosaic shielding inhibitor, a mosaic shielding agent, a mosaic shielding filtrate reducer, a mosaic shielding lubricating collapse preventing agent and the like, and mixing to form a mosaic shielding drilling fluid system; drilling by using the inlaid shielding drilling fluid system until the two well sections are drilled; by adopting the method, a better temporary blocking shielding effect can be achieved, and drilling fluid is prevented from invading an oil layer.
Description
Technical Field
The application relates to the technical field of drilling, in particular to a drilling method for preventing drilling fluid from invading.
Background
In order to effectively prevent drilling fluid from invading a reservoir stratum and prevent the reservoir stratum from being damaged in the drilling process, a conventional shielding temporary plugging technology, a broad-spectrum shielding temporary plugging technology, an ideal filling shielding temporary plugging technology and the like are sequentially arranged. The temporary blocking agent particle size is smaller than the pore or crack size, and is strictly matched with the pore throat size of the reservoir according to a certain rule, so that the accurate acquisition of the pore size and distribution of the reservoir is the premise and key point of successful implementation of the temporary blocking agent. However, due to the limitation of the heterogeneity of reservoir rock, it is often difficult to accurately obtain pore size data of a construction well, a temporary blocking shielding effect is often not ideal, damage to an oil and gas layer can be increased sometimes, and subsequent blocking removal operation is often required after temporary blocking shielding, so that production cost is increased.
Disclosure of Invention
The application aims to provide a drilling method for preventing drilling fluid from invading, which solves the problems that the common drilling fluid system in the existing drilling method is large in blocking ratio, poor in temporary blocking shielding effect and easy to invade an oil layer by using a mosaic shielding drilling fluid system.
The aim of the application can be achieved by the following technical scheme:
a drilling method for preventing invasion of drilling fluid, comprising the steps of:
step one, a well opening section:
s1: cleaning a ground circulation tank with clear water, preparing pre-hydration soil slurry, and hydrating for more than 24 hours for later use;
s2: adopting clear water to drill, and then using drilling fluid containing embedded shielding inhibitor to prevent formation pulping and bit balling;
s3: after drilling a well section, fully flushing the well, and replacing the well drilling fluid with the adjusted viscosity of 50 s-60 s in the well bore;
step two, a well opening section:
s4: drilling fluid system configuration:
s41: drilling a cement plug by using a drilling fluid at a well section, releasing the drilling fluid polluted by the cement plug after drilling, adding sodium carbonate and an anti-pollution agent to treat the residual drilling fluid, and supplementing clean water for full circulation;
s42: then adding mosaic shielding inhibitor, mosaic shielding agent, mosaic shielding filtrate reducer, mosaic shielding lubricating collapse preventing agent, non-fluorescent water-based lubricant HRH-101, modified alkyl silicon YJG-X, hydrolyzed polyacrylonitrile ammonium salt, emulsified asphalt, sodium carbonate, caustic soda flakes and barite BaSO 4 Mixing with sulfomethyl phenolic resin to form an inlaid shielding drilling fluid system;
s43, drilling by using the shielding drilling fluid system inlaid in the step S42 until the two well sections are drilled;
s5: drilling fluid system maintenance:
s51: after the second well is opened, using clear water and mosaic shielding inhibitor glue solution to maintain a mosaic shielding drilling fluid system, and adding the mosaic shielding inhibitor accounting for 0.05% of the total amount of the drilling fluid system every 12 hours;
s52: the content of the shielding inhibitor glue solution is ensured to be embedded in a drilling fluid system when drilling in a slurry making section, so that the effective content of the shielding inhibitor glue solution is kept between 0.3 and 0.5 percent, and meanwhile, the water flow of a water pipeline on a circulating tank is ensured to be followed all the time;
s53: before drilling to the librarian group, 1% of embedded shielding filtrate reducer is added into the drilling fluid system to reduce the filtration vector of the drilling fluid system;
s54: 0.5% of a mosaic shielding agent is added to the drilling fluid system 100-50m before entering the target layer.
As a further scheme of the application: in the step S2, the content of the mosaic shielding inhibitor in the drilling fluid containing the mosaic shielding inhibitor is 0.1-0.3%.
As a further scheme of the application: the drilling fluid with the viscosity of 50-60 s in the first step comprises the following raw materials in parts by weight: 100 parts of water, naCO 3 0.25 part of bentonite, 3 parts of mosaic shielding inhibitor, 0.3-0.5 part of mosaic shielding filtrate reducer;
and the density of the drilling fluid with the viscosity of 50-60 s in the first step is 1.05-1.08g/cm 3 。
As a further scheme of the application: the drilling fluid at the first well section in the second step is the drilling fluid with the viscosity of 50-60 s in the first step.
As a further scheme of the application: the shielding drilling fluid system is inlaid in the second step, and comprises the following raw materials in parts by weight:
bentonite 2-4 parts, na 2 CO 3 0.1-0.2 part, 0.3-0.5 part of mosaic shielding inhibitor, 1-1.5 part of mosaic shielding agent, 1-2 parts of mosaic shielding filtrate reducer, 1-2 parts of mosaic shielding lubricating collapse preventing agent, 1.0-2.0 parts of liquid viscosity reducer, 0.5-1 part of hydrolyzed polyacrylonitrile ammonium salt, 0.5-1 part of emulsified asphalt, 0.1 part of caustic soda flakes, 2-3 parts of liquid lubricant and barite BaSO 4 20-22 parts of sulfomethyl phenolic resin, 1-1.5 parts of water and 100 parts of water.
As a further scheme of the application: the mosaic shielding agent is HXP-2A-I, the mosaic shielding inhibitor is HXP-2A-II, the mosaic shielding filtrate reducer is HXP-2B-I, and the mosaic shielding lubrication collapse preventing agent is HXP-2B-II.
The application has the beneficial effects that:
according to the application, a drilling fluid system is regulated in a drilling method, particularly a stable mosaic shielding drilling fluid system is formed in a two-well opening stage, and the effects that the mechanical drilling speed is improved by more than 10%, the overall well cementation quality high-quality rate is more than or equal to 80% and the permeability recovery value of a reservoir rock core is more than or equal to 90% are further realized by mixing the mosaic shielding agent HXP-2A-I, the mosaic shielding inhibitor HXP-2B-I, the mosaic shielding fluid loss reducer HXP-2B-II and various auxiliary agents to form the stable mosaic shielding drilling fluid system.
Detailed Description
Raw material details of the drilling fluid system used in the examples of the present application:
a drilling method for preventing invasion of a drilling fluid, the drilling method comprising the steps of:
step one, a well opening section:
s1: cleaning a ground circulation tank by adopting clear water, preparing a sufficient amount of pre-hydration soil slurry, and hydrating for more than 24 hours for later use;
s2: adopting clear water to drill, and then using drilling fluid containing embedded shielding inhibitor to prevent formation pulping and bit balling;
s3: after drilling a well section, carrying out full well flushing with large discharge capacity, and substituting the well drilling fluid with the adjusted viscosity of about 50-60 s in a well shaft to ensure that the surface casing is smoothly put in.
Step two, a well opening section:
s4: drilling fluid system configuration:
s41: drilling a cement plug by using a drilling fluid at a well section, releasing the drilling fluid polluted by the cement plug after drilling, adding sodium carbonate and an anti-pollution agent to treat the residual drilling fluid, and simultaneously supplementing sufficient clean water for full circulation;
s42: then adding mosaic shielding inhibitor, mosaic shielding agent, mosaic shielding filtrate reducer, mosaic shielding lubricant collapse inhibitor, non-fluorescent water-based lubricant HRH-101, modified alkyl silicon YJG-X and hydrolyzed polymerAcrylonitrile ammonium salt, emulsified asphalt, sodium carbonate, caustic soda flakes and barite BaSO 4 And sulfomethyl phenolic resin to form the inlaid shielding drilling fluid system.
S43, drilling by using the shielding drilling fluid system inlaid in the step S42 until the two well sections are drilled;
s5: drilling fluid system maintenance:
s51: after the second well is opened, using clear water and mosaic shielding inhibitor glue solution configured by a shearing dilution pump to maintain a mosaic shielding drilling fluid system, and adding the mosaic shielding inhibitor accounting for 0.05% of the total amount of the drilling fluid system every 12 hours;
s52: the content of the shielding inhibitor glue solution is ensured to be embedded in a drilling fluid system during drilling in a slurry making section (a clear town), so that the effective content of the shielding inhibitor glue solution is kept between 0.3 and 0.5 percent, and the shielding inhibitor glue solution is ensured to have good inhibition performance and is prevented from well collapse and hydration expansion. Meanwhile, the water flow of the water pipeline on the circulating tank is guaranteed to follow all the time. According to the condition on the well, 1 percent of embedded shielding lubrication collapse preventing agent and non-fluorescent water-based lubricant HRH-101 are added (directional well), so that the lubricity of a drilling fluid system is ensured;
s53: before drilling to the librarian group, 1% of embedded shielding filtrate reducer is added into the drilling fluid system to reduce the filtration vector of the drilling fluid system and prevent complex accidents such as lost circulation and the like;
s54: 0.5% of embedded shielding agent is added into the drilling fluid system before entering the target layer for 100-50m, so that the shielding plugging performance is enhanced;
s55: when the fluid loss of the drilling fluid system is increased in the drilling process, the embedded shielding fluid loss additive should be timely supplemented; if the viscosity is increased due to hydration of clay, the SMC glue solution or the mixed glue solution of the organosilicon stabilizer and the liquid viscosity reducer should be timely supplemented so as to keep the drilling fluid system stable;
s56: some foam may appear in the drilling fluid system in the circulation process, and about 0.02% of defoaming agent should be added to timely remove foam in the case of the foam;
s57: when the viscosity is increased in drilling, 1), the content of the mosaic shielding inhibitor is reduced, and the mosaic shielding inhibitor should be supplemented in time to ensure that the effective content is kept between 0.3 and 0.5 percent; 2) The drill cuttings invade, a finer screen (200 mesh screen) is replaced, and solid control equipment is used;
s58: 1) when stratum fluid appears in the drilling process, and when water invasion appears in the drilling process, in order to ensure the system stability, each water should be supplemented with a corresponding proportion of treating agent, so as to ensure that the content of various auxiliary agents in the drilling fluid system is kept in a stable range; 2) If large amounts of oil and water are invaded during tripping, they must be released during the tripping cycle.
Step three, three well sections:
s6: and continuing drilling by using the two-section drilling fluid system until the drilling is completed.
The content of the mosaic shielding inhibitor in the drilling fluid containing the mosaic shielding inhibitor in the first step is 0.1-0.3%;
the drilling fluid with the viscosity of about 50-60 s in the first step comprises the following raw materials in parts by weight: 100 parts of water, naCO 3 0.25 part of bentonite, 3 parts of mosaic shielding inhibitor, 0.3-0.5 part of mosaic shielding filtrate reducer;
and the density of the drilling fluid with the viscosity of about 50-60 s in the first step is 1.05-1.08g/cm 3 ；
The well section of the first step can be a straight well section or an inclined well section, the method of the first step is adopted to drill the well when the straight well section is opened, and the shielding, lubricating and anti-collapse agent and the non-fluorescent water-based lubricant HRH-101 are required to be added before orientation when the inclined well section is opened, so that the lubricating property of the drilling fluid is ensured. Wherein, the addition of the embedded shielding lubrication collapse preventing agent and the HRH-101 is 0.2 percent of the total amount of the drilling fluid;
the drilling fluid at the first well section in the second step is the drilling fluid with the viscosity of about 50 s-60 s in the first step;
the shielding drilling fluid system is inlaid in the second step, and comprises the following raw materials in parts by weight:
bentonite 2-4 parts, na 2 CO 3 0.1-0.2 part, 0.3-0.5 part of mosaic shielding inhibitor, 1-1.5 part of mosaic shielding agent, 1-2 parts of mosaic shielding filtrate reducer, 1-2 parts of mosaic shielding lubricating collapse preventing agent, 1.0-2.0 parts of liquid viscosity reducer, 0.5-1 part of hydrolyzed polyacrylonitrile ammonium salt, 0.5-1 part of emulsified asphalt, 0.1 part of caustic soda flakes, 2-3 parts of liquid lubricant and heavy weightSpar BaSO 4 20-22 parts of sulfomethyl phenolic resin 1-1.5 parts and 100 parts of water;
the embedded shielding agent is HXP-2A-I and is used for embedding and plugging pores and cracks of a well bore, ensuring the regularity and stability of the well bore, protecting a reservoir, preventing well wall from collapsing and preventing lost circulation;
the inlaid shielding inhibitor is HXP-2A-II and is used for shielding and strongly inhibiting, preventing the formation from pulping and dispersing and guaranteeing the stability of a borehole;
the inlaid shielding filtrate reducer is HXP-2B-I, and is used for shielding and plugging a well bore and preventing liquid in drilling fluid from penetrating into a stratum;
the embedded shielding lubrication collapse prevention agent is HXP-2B-II, is used for reducing viscosity and preventing collapse, and ensures the rule and stability of a well bore;
the inlaid shielding drilling fluid system is applied to the drilling process in the Tang-home river oil field, and the achieved drilling fluid is shown in the following table 1;
table 1: a drilling fluid performance table;
the drilling method of the application uses the embedded shielding drilling fluid system to be applied to the three-broken-block drilling engineering of the Tang-family river oil field, six wells are drilled at present by adopting the embedded shielding drilling fluid system, and the six wells are distributed on the three-broken-block, and compared with the 81X 1 blocks of the harbor depth, the drilling speed data are shown in the following table 2;
table 2: comparing the mechanical drilling speed with a data table;
from the data in Table 2, it can be seen that the average well depth is increased by 186m using the mosaic screened drilling fluid system according to the drilling method of the present application compared with the conventional drilling fluid system used for 81X 1 blocks in harbor, the drilling period is equivalent to the well construction period, and the average mechanical drilling rate is increased by 2.3m/h (equivalent to 10.31%.
Compared with the silicon-based anti-tatter drilling fluid system used before in the application process of Tang Gu river oil fields, the drilling method adopts the embedded shielding drilling fluid system in the drilling fluid blocking ratio as shown in the following table 3:
table 3: a plug ratio comparison data table;
as can be seen from the data in table 3, the plugging ratio of the drilling method of the application using the inlaid shielding drilling fluid system is far smaller than that of the silicon-based anti-tatter drilling fluid system, and the drilling method has better temporary plugging shielding effect and prevents the drilling fluid from invading the oil layer.
In the drilling method, a slurry system in a mosaic shielding drilling fluid system is a mosaic shielding system, a slurry system in a silicon-based anti-tatting drilling fluid system is a polysilicone system, and the data of well drilling and cementing-interface high-quality rate after application are shown in the following table 4;
table 4: well cementation-interface high-quality rate data table;
as can be seen from the data in Table 4, the two-interface high-quality rate of the well drilled by the embedded shielding drilling fluid system is 99.21% at the highest, 87.57% at the lowest, the overall well cementation quality high-quality rate is more than or equal to 80%, and is far greater than 75.55% of the highest two-interface high-quality rate in the well drilled by the silicon-based anti-tatter drilling fluid system, and the difference between the two-interface high-quality rate and the one-interface high-quality rate of the well drilled by the embedded shielding drilling fluid system is smaller, so that the two-interface high-quality rate is more even.
After the drilling method of the application adopts the inlaid shielding drilling fluid system and the silicon-based anti-tatting drilling fluid system, the polymer drilling fluid system and the KCL polymer drilling fluid system, the permeability recovery values of reservoir cores are compared with the following table 5;
table 5 permeability recovery value comparison table for reservoir core;
as can be seen from the data in Table 5, the permeability recovery value of the reservoir core of the drilling method of the application, which adopts the inlaid shielding drilling fluid system, is more than or equal to 90 percent and is far higher than that of the other three systems.
The foregoing describes one embodiment of the present application in detail, but the description is only a preferred embodiment of the present application and should not be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.
Claims (3)
1. A drilling method for preventing invasion of drilling fluid, comprising the steps of:
step one, a well opening section:
s1: cleaning a ground circulation tank with clear water, preparing pre-hydration soil slurry, and hydrating for more than 24 hours for later use;
s2: drilling with clear water, and then using drilling fluid containing embedded shielding inhibitor to prevent formation pulping and bit balling, wherein the content of the embedded shielding inhibitor is 0.1-0.3%;
s3: after drilling a well section, fully flushing the well, and replacing the well drilling fluid with the adjusted viscosity of 50-60 s in the well bore; the drilling fluid comprises the following raw materials in parts by weight: 100 parts of water, naCO 3 0.25 part of bentonite, 3 parts of mosaic shielding inhibitor, 0.3-0.5 part of mosaic shielding filtrate reducer; the density of the drilling fluid is 1.05-1.08g/cm 3 ；
Step two, a well opening section:
s4: drilling fluid system configuration:
s41: drilling a cement plug by using a drilling fluid at a well section, releasing the drilling fluid polluted by the cement plug after drilling, adding sodium carbonate and an anti-pollution agent to treat the residual drilling fluid, and supplementing clean water for full circulation, wherein the drilling fluid at the well section is the drilling fluid with the viscosity of 50-60 s in the first step;
s42: then adding mosaic shielding inhibitor, mosaic shielding agent, mosaic shielding filtrate reducer and mosaicEmbedded shielding lubricating anti-collapse agent, non-fluorescent water-based lubricant HRH-101, modified alkyl silicon YJG-X, hydrolyzed polyacrylonitrile ammonium salt, emulsified asphalt, sodium carbonate, caustic soda flakes, barite BaSO 4 Mixing with sulfomethyl phenolic resin to form an inlaid shielding drilling fluid system;
s43, drilling by using the shielding drilling fluid system inlaid in the step S42 until the two well sections are drilled;
s5: drilling fluid system maintenance:
s51: after the second well is opened, using clear water and mosaic shielding inhibitor glue solution to maintain a mosaic shielding drilling fluid system, and adding the mosaic shielding inhibitor accounting for 0.05% of the total amount of the drilling fluid system every 12 hours;
s52: the content of the shielding inhibitor glue solution is ensured to be embedded in a drilling fluid system when drilling in a slurry making section, so that the effective content of the shielding inhibitor glue solution is kept between 0.3 and 0.5 percent, and meanwhile, the water flow of a water pipeline on a circulating tank is ensured to be followed all the time; 1% of embedded shielding lubrication collapse inhibitor and non-fluorescent water-based lubricant HRH-101 are added, so that the lubricity of a drilling fluid system is ensured;
s53: before drilling to the librarian group, 1% of embedded shielding filtrate reducer is added into the drilling fluid system to reduce the filtration vector of the drilling fluid system;
s54: 0.5% of a mosaic shielding agent is added to the drilling fluid system 100-50m before entering the target layer.
2. The drilling method for preventing invasion of drilling fluid according to claim 1, wherein the shielding drilling fluid system is inlaid in the second step, and comprises the following raw materials in parts by weight:
bentonite 2-4 parts, na 2 CO 3 0.1-0.2 part, 0.3-0.5 part of mosaic shielding inhibitor, 1-1.5 part of mosaic shielding agent, 1-2 parts of mosaic shielding filtrate reducer, 1-2 parts of mosaic shielding lubricating collapse preventing agent, 1.0-2.0 parts of liquid viscosity reducer, 0.5-1 part of hydrolyzed polyacrylonitrile ammonium salt, 0.5-1 part of emulsified asphalt, 0.1 part of caustic soda flakes, 2-3 parts of liquid lubricant and barite BaSO 4 20-22 parts of sulfomethyl phenolic resin, 1-1.5 parts of water and 100 parts of water.
3. The method of drilling well for preventing invasion of drilling fluid according to claim 1, wherein the mosaic shielding agent is HXP-2A-I, the mosaic shielding inhibitor is HXP-2A-II, the mosaic shielding filtrate reducer is HXP-2B-I, and the mosaic shielding lubrication collapse preventing agent is HXP-2B-II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311163920.0A CN116905988B (en) | 2023-09-11 | 2023-09-11 | Drilling method for preventing drilling fluid from invading |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105969323A (en) * | 2016-06-03 | 2016-09-28 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | High-density water-based drilling fluid for shale gas horizontal well |
| CN110760294A (en) * | 2019-11-18 | 2020-02-07 | 廊坊庆兴化工有限公司 | Anti-collapse filtrate reducer silicon-fluorine resin compound for drilling fluid |
| CN116622346A (en) * | 2023-07-24 | 2023-08-22 | 天津市滨海新区大港鼎澄工贸有限公司 | Elastic inlaid shielding drilling fluid for drilling construction |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105969323A (en) * | 2016-06-03 | 2016-09-28 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | High-density water-based drilling fluid for shale gas horizontal well |
| CN110760294A (en) * | 2019-11-18 | 2020-02-07 | 廊坊庆兴化工有限公司 | Anti-collapse filtrate reducer silicon-fluorine resin compound for drilling fluid |
| CN116622346A (en) * | 2023-07-24 | 2023-08-22 | 天津市滨海新区大港鼎澄工贸有限公司 | Elastic inlaid shielding drilling fluid for drilling construction |
Non-Patent Citations (1)
| Title |
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| 镶嵌屏蔽钻井液在中11-66井的应用;张勇等;《内蒙古石油化工》;第29-30页 * |
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