CN116554844A - Potassium salt drilling high-performance composite brine drilling fluid - Google Patents
Potassium salt drilling high-performance composite brine drilling fluid Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 83
- 239000012530 fluid Substances 0.000 title claims abstract description 60
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 title claims abstract description 34
- 239000012267 brine Substances 0.000 title claims abstract description 33
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 title claims abstract description 15
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 28
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 13
- 239000000706 filtrate Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000001110 calcium chloride Substances 0.000 claims abstract description 10
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 10
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 9
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- 239000004094 surface-active agent Substances 0.000 claims abstract description 7
- 239000001913 cellulose Substances 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 7
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 6
- 159000000000 sodium salts Chemical class 0.000 claims description 6
- 229920002907 Guar gum Polymers 0.000 claims description 5
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 5
- 239000000665 guar gum Substances 0.000 claims description 5
- 229960002154 guar gum Drugs 0.000 claims description 5
- 235000010417 guar gum Nutrition 0.000 claims description 5
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 5
- 229920000053 polysorbate 80 Polymers 0.000 claims description 5
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 5
- 240000004584 Tamarindus indica Species 0.000 claims description 3
- 235000004298 Tamarindus indica Nutrition 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 abstract description 12
- 239000001103 potassium chloride Substances 0.000 abstract description 10
- 235000011164 potassium chloride Nutrition 0.000 abstract description 10
- 230000005764 inhibitory process Effects 0.000 abstract description 9
- 239000000843 powder Substances 0.000 abstract description 9
- 230000001050 lubricating effect Effects 0.000 abstract description 8
- 239000011435 rock Substances 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 abstract description 3
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 abstract description 3
- 239000002318 adhesion promoter Substances 0.000 abstract 1
- 235000002639 sodium chloride Nutrition 0.000 description 17
- 150000003839 salts Chemical group 0.000 description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 229920000447 polyanionic polymer Polymers 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 240000007472 Leucaena leucocephala Species 0.000 description 2
- 235000010643 Leucaena leucocephala Nutrition 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 244000303965 Cyamopsis psoralioides Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- JYAXYNMOHKXUNL-UHFFFAOYSA-N [Na].C=CC#N Chemical compound [Na].C=CC#N JYAXYNMOHKXUNL-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010442 halite Substances 0.000 description 1
- 239000000416 hydrocolloid Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- C09K8/08—Clay-free compositions containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K8/10—Cellulose or derivatives thereof
-
- 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
- C09K8/26—Oil-in-water emulsions
- C09K8/28—Oil-in-water emulsions containing 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Lubricants (AREA)
Abstract
The invention provides a potassium salt drilling high-performance composite brine drilling fluid which comprises the following components in parts by weight: 100 parts of water, 30-50 parts of magnesium chloride, 10-30 parts of calcium chloride, 0.5-2 parts of environment-friendly filtrate reducer, 0.3-1 part of environment-friendly adhesion promoter, 0.5-1.5 parts of magnesium oxide, 0.5-2 parts of lubricant and 0.5-1 part of surfactant. The high-performance composite brine drilling fluid has excellent inhibition performance, lubricating performance, rock powder carrying performance, filtration reducing performance and rheological stability, and is suitable for potassium salt geological drilling engineering sites such as deep hole sylvite stratum, carnallite stratum and the like.
Description
Technical Field
The invention relates to the technical field of drilling fluid in geological drilling and scientific drilling processes, in particular to high-performance composite brine drilling fluid for potassium salt drilling.
Background
Sylvite drilling engineering can drill sylvite investigation wells constructed in mudstone, conglomerate, silty mudstone, sandstone, sylvite, halite, carnallite and other strata, such as Yunnan Jiang city county and Yunnan Jinggu county. Wherein, the sylvite and rock stratum are easy to erode when meeting water, which causes the problems of poor quality of salt cores, enlarged well diameter and the like; the mudstone, the mudstone and other strata expand or disperse when meeting water, and the mudstone powder is suspended and dispersed in the drilling fluid, so that the problems of increased solid phase content of the drilling fluid, bit balling and the like are caused. The potassium salt deep hole rope core drilling process requires that the brine drilling fluid has excellent salt core corrosion inhibition capability, rock powder carrying performance and lubricating performance, and lower viscosity and filtration loss.
At present, brine drilling fluid, saturated magnesium chloride saline drilling fluid, composite saturated saline drilling fluid and oil-based drilling fluid are mainly adopted in the potassium salt drilling engineering. However, the drilling fluid prepared from brine or saline water generally has the problems of poor lubricating performance, poor carrying capacity of rock powder, large filter loss and the like during construction. The viscosity of the saturated brine drilling fluid prepared from magnesium chloride is greatly increased after aging, so that the pumping pressure is increased during drilling to influence the drilling efficiency.
CN10240881a discloses a drilling flushing fluid and a preparation method thereof, which comprises the following components in parts by weight: 150-180 parts of water, 70-90 parts of magnesium chloride, 1-10 parts of magnesium hydroxide, 1-5 parts of salt-resistant tackifier, 1-5 parts of grafted starch, 2-5 parts of lubricant, 0.5-1 part of coating agent, 3-5 parts of salt inhibitor and 1-3 parts of defoamer. The drilling fluid has strong inhibition, and can keep the hole wall stable when being used for drilling a potassium salt ore body.
CN202111591901 discloses a composite brine drilling fluid suitable for lithium-rich potassium resources, which comprises the following components in parts by weight: 100 parts of composite brine, 3-5 parts of salt-resistant pulping material, 4-5 parts of salt-resistant filtrate reducer, 2-3 parts of salt-resistant collapse inhibitor, 1-5 parts of salt-resistant flow regulator, 3-5 parts of salt-resistant plugging agent and 0.1-0.5 part of salt recrystallization inhibitor. Wherein the compound brine consists of the following components in parts by weight: 100 parts of water, 20-35 parts of sodium chloride and 10-20 parts of magnesium chloride. The drilling fluid has good corrosion inhibition, rheological property and stability of a salt deposit.
CN202110635188 discloses a high-performance drilling fluid suitable for a solid potassium salt mineral layer and a preparation method thereof, which comprises the following components in percentage by weight: 1-2% of barite, 2-3% of sepiolite, 1-2% of rice hull powder, 2-5% of macromolecular hydrocolloid, 2-3% of water-soluble alcohol, 1-2% of borax and the balance of tetrasalt solution. Wherein the water-soluble alcohol is a mixture of glycol, polyethylene glycol and polyvinyl alcohol, and the weight ratio of the glycol to the polyethylene glycol to the polyvinyl alcohol is 1 (0.6-1) (0.4-1); the tetrasalt solution is prepared from the following raw materials in percentage by weight: 4-6% of sodium chloride, 8-10% of potassium chloride, 24-26% of magnesium chloride, 20-25% of calcium chloride and the balance of water; the macromolecular colloid is gelatin and acacia, and the weight ratio of the gelatin to the acacia is (1.5-4): 0.5-1. The drilling fluid can reduce the phenomenon of sticking drilling and improve the coring quality of a solid sylvite ore layer. The viscosity of the drilling fluid hopper prepared by the listed 16 examples is 52-55 s, and the 30-minute filtrate loss is less than 15mL. The tetrasalt solution contains 8-10% of potassium chloride, and the potassium salt drilling investigation well requires that the drilling fluid treatment agent not contain potassium element so as to avoid influencing the analysis of the components of the core sample.
Therefore, there is a need for developing high performance composite brine drilling fluid technology for deep hole drilling of potassium salts such as sylvite.
Disclosure of Invention
The technical problem to be solved by the invention is that saline drilling fluid used in drilling engineering of drilling a deep hole by drilling a rope with a stratum potassium salt such as mudstone and kalium has the problems of poor rock powder portability, large filtrate loss, poor lubricity, bit balling and the like.
In order to solve the problems, the invention provides a high-performance composite brine drilling fluid for potassium salt drilling, which comprises the following components in parts by weight:
preferably, the magnesium chloride and the calcium chloride are used for inhibiting dissolution or corrosion of sylvite, carnallite and the like, and improving the inhibition performance of the drilling fluid.
Preferably, the environment-friendly filtrate reducer is a composition of hydrolyzed polyacrylonitrile sodium salt and low-viscosity polyanion cellulose, and the environment-friendly filtrate reducer is used for reducing the filtrate loss of drilling fluid.
Preferably, the environment-friendly tackifier is one of guar gum, tamarind gum or tackifier GTQ, and the environment-friendly tackifier is used for improving the viscosity of the drilling fluid.
Preferably, the magnesium oxide is used for improving the shear force and the dynamic plastic ratio of the solid-free brine drilling fluid.
Preferably, the lubricant is a vegetable oil type liquid lubricant, and the lubricant is used for improving the lubricating performance of the drilling fluid.
Preferably, the surfactant is one of sodium dodecyl benzene sulfonate and tween 80, and the surfactant is used for emulsifying the lubricant so as to better disperse the lubricant in the brine drilling fluid.
The high-performance composite brine drilling fluid has excellent inhibition performance, lubricating performance, rock powder carrying performance, filtrate loss reducing performance and rheological stability, and specific performance parameters are as follows: the Su funnel viscosity is less than 45s, the dynamic-plastic ratio is more than or equal to 0.3, the API filtration loss is less than or equal to 6mL, the relative expansion reduction rate is more than or equal to 85%, and the lubrication coefficient is less than or equal to 0.05.
Compared with the prior art, the invention has the beneficial effects that:
(1) The compound brine is prepared by adopting magnesium chloride and calcium chloride, so that the brine drilling fluid has good rheological stability, and the problem of viscosity increase of the single magnesium chloride salt water drilling fluid after aging is solved.
(2) The magnesium oxide is used as an inexpensive salt-resistant cutting agent, so that the problem that the rock powder carrying performance of the solid-free salt water drilling fluid is poor due to low dynamic-plastic ratio is solved.
(3) And adding the lubricant and the surfactant to form oil-in-water droplets in the drilling fluid, so as to change the activity of water in the brine drilling fluid and further improve the inhibition and lubricating performance of the brine drilling fluid.
(4) The high-performance composite brine drilling fluid provided by the invention has excellent inhibition performance, lubricating performance, rock powder carrying performance, filtrate loss reduction performance and good rheological stability.
(5) The high-performance composite brine drilling fluid provided by the invention is simple to prepare and easy to prepare and maintain.
Detailed Description
The technical solutions disclosed in the present invention will be clearly and completely described in connection with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Also, the materials used in the examples are all commercially available.
In the invention, the magnesium chloride is preferably selected from Qinghai iron source magnesium industry Limited liability company, a praise service Kun Xue chemical industry Limited company and a Shandong Heze chemical industry Limited company.
In the invention, the calcium chloride is preferably selected from the source chemical industry limited company of the Weifang sea and the Guangxi chemical industry limited company of the Weifang Guangxu.
In the invention, the hydrolyzed acrylonitrile sodium salt of the environment-friendly filtrate reducer is preferably selected from the three-topology chemical industry products of Baoding City, and the low-viscosity polyanion cellulose is preferably selected from the Xu Zhouli-source chemical industry Co.
In the invention, guar gum and tamarind gum in the environment-friendly tackifier are preferably selected from Beijing guar wetting technology and technology Co., ltd, and the tackifier GTQ is selected from Beijing prospecting engineering institute.
In the invention, the magnesium oxide is preferably selected from the magnesium salt limited company of Kabo in a corner of a wiry, and the magnesium salt limited company of Henghai, liyun gang.
In the invention, the lubricant is preferably selected from extreme pressure lubricant GLUB of Beijing prospecting engineering institute and vegetable oil lubricant HY-202 of Shandong Shunyuan oil technology Co.
In the invention, sodium dodecyl benzene sulfonate in the surfactant is preferably selected from eastern Xinwang chemical industry Limited liability company, and Tween 80 is preferably selected from Jiangsu province sea-An petrochemical plant.
Example 1
(1) Drilling fluid formula
The lubricating oil comprises, by weight, 100 parts of fresh water, 45 parts of magnesium chloride, 15 parts of calcium chloride, 0.5 part of hydrolyzed polyacrylonitrile sodium salt, 0.5 part of low-viscosity polyanion cellulose, 0.5 part of tackifier GTQ, 0.5 part of magnesium oxide, 1 part of extreme pressure lubricant GLUB and 0.5 part of sodium dodecyl benzene sulfonate.
(2) Preparation method
Firstly, adding magnesium chloride and calcium chloride into fresh water, and fully dissolving; and then sequentially adding the hydrolyzed polyacrylonitrile sodium salt, the low-viscosity polyanion cellulose, the tackifier GTQ, the magnesium oxide, the extreme pressure lubricant GLUB and the sodium dodecyl benzene sulfonate, and rapidly and uniformly stirring to obtain the high-performance composite brine drilling fluid.
(3) Drilling fluid performance test
The prepared drilling fluid was tested for performance using a threo funnel viscometer, a six-speed rotational viscometer, a medium pressure filter, an expansion tester and a drilling fluid lubricity tester, and the results are shown in table 1.
Table 1 results of high performance composite brine drilling fluid testing
Example 2
(1) Drilling fluid formula
The compound comprises, by weight, 100 parts of fresh water, 40 parts of magnesium chloride, 25 parts of calcium chloride, 0.8 part of hydrolyzed polyacrylonitrile sodium salt, 0.7 part of low-viscosity polyanion cellulose, 0.6 part of guar gum, 1 part of magnesium oxide, 1.5 parts of extreme pressure lubricant GLUB and 1 part of tween 80.
(2) Preparation method
Firstly, adding magnesium chloride and calcium chloride into fresh water, and fully dissolving; and then sequentially adding hydrolyzed polyacrylonitrile sodium salt, low-viscosity polyanion cellulose, guar gum, magnesium oxide, an extreme pressure lubricant GLUB and Tween 80, and rapidly and uniformly stirring to obtain the high-performance composite brine drilling fluid.
(3) Drilling fluid performance test
The prepared drilling fluid was tested for performance using a threo funnel viscometer, a six-speed rotational viscometer, a medium pressure filter, an expansion tester and a drilling fluid lubricity tester, and the results are shown in table 2.
Table 2 results of high performance composite brine drilling fluid testing
The data of examples 1 to 2 show that the prepared high-performance composite brine drilling fluid has excellent inhibition performance, lubricating performance, filtration-reducing performance and lower viscosity, and can meet the requirements of a potassium salt deep hole rope coring drilling process.
Claims (6)
1. The high-performance composite brine drilling fluid for potassium salt drilling is characterized by comprising the following components in parts by weight:
2. the high-performance composite brine drilling fluid for potassium salt drilling is characterized by comprising the following components in parts by weight:
100 parts of water, 35-45 parts of magnesium chloride, 15-25 parts of calcium chloride, 1-2 parts of environment-friendly filtrate reducer, 0.5-1 part of environment-friendly tackifier, 0.5-1 part of magnesium oxide, 1-2 parts of lubricant and 0.5-1 part of surfactant.
3. The high performance composite brine drilling fluid of claim 2 wherein: the environment-friendly filtrate reducer is a composition of hydrolyzed polyacrylonitrile sodium salt and low-viscosity polyanionic cellulose.
4. The high performance composite brine drilling fluid of claim 2 wherein: the environment-friendly tackifier is one of guar gum, tamarind gum or tackifier GTQ.
5. The high performance composite brine drilling fluid of claim 2 wherein: the lubricant is a vegetable oil type liquid lubricant.
6. The high performance composite brine drilling fluid of claim 2 wherein: the surfactant is one of sodium dodecyl benzene sulfonate and tween 80.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310536727.0A CN116554844A (en) | 2023-05-12 | 2023-05-12 | Potassium salt drilling high-performance composite brine drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310536727.0A CN116554844A (en) | 2023-05-12 | 2023-05-12 | Potassium salt drilling high-performance composite brine drilling fluid |
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| CN116554844A true CN116554844A (en) | 2023-08-08 |
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| CN202310536727.0A Pending CN116554844A (en) | 2023-05-12 | 2023-05-12 | Potassium salt drilling high-performance composite brine drilling fluid |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4264455A (en) * | 1978-10-18 | 1981-04-28 | W. R. Grace & Co. | Drilling mud viscosifier |
| JPH0881216A (en) * | 1994-09-09 | 1996-03-26 | Daicel Amiboshi Sangyo Kk | Water suspension of magnesium hydroxide and its production |
| CN102408881A (en) * | 2011-10-17 | 2012-04-11 | 北京探矿工程研究所 | Drilling flushing fluid and preparation method thereof |
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