CN110016326A - A kind of low-activity alcohol base drilling fluid and its preparation method - Google Patents
A kind of low-activity alcohol base drilling fluid and its preparation method Download PDFInfo
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- CN110016326A CN110016326A CN201810020341.3A CN201810020341A CN110016326A CN 110016326 A CN110016326 A CN 110016326A CN 201810020341 A CN201810020341 A CN 201810020341A CN 110016326 A CN110016326 A CN 110016326A
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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
- C09K8/04—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
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention relates to a kind of low-activity alcohol base drilling fluid and its preparation methods, raw material contains in parts by weight: 45-70 parts of small molecule polyol, 20-45 parts of water, 0.025-0.125 parts of sodium carbonate, 0.05-0.25 parts of caustic soda, 0.5-3.2 parts of sodium bentonite, 0.1-0.5 parts of high molecular polymer flocculant, 2-5 parts of fluid loss additive, 3-6 parts of sealing agent, 0.05-0.1 parts of high-temperature stabilizer, 0.02-0.1 parts of defoaming agent, 0-60 parts of weighting material.Low-activity alcohol base drilling fluid of the present invention had not only had lower activity, but also the not addition of salts substances, and it is a kind of Environment-protecting Drilling Fluids system that drilling fluid rheology and filtration property, which are easy to regulate and control and will not generate injury to environment,.In mud shale stratum drilling, the lower activity of the drilling fluid system is conducive to improve the membrane efficiency of mud shale stratum, reduces the intrusion of drilling fluid filtrate, is conducive to wellbore stability.
Description
Technical field
The present invention relates to one of drilling fluid field low-activity alcohol base drilling fluid and its preparation methods, specifically, being
It is related to a kind of low-activity alcohol base drilling fluid and its preparation method for stabilizing borehole, can be used for the probing of mud shale stratum.
Background technique
In recent years, develop with petroleum exploration and development to deep and bad ground, deep-well, ultradeep well and Holes of Complicated Wells are increasingly
It is more, it bores the stratum met and becomes increasingly complex, especially some shale oil gas extended horizontal wells, due to extended horizontal depth, wellbore
Track complexity etc., in drilling stratum easily occur leakage, collapse, undergauge, serious pulping the problems such as, cause down hole problem to increase
Add, data shows that the wellbore problem of 70-90% is related with the unstability of mud shale.Mud shale meets the easy hydration swelling of water electrode point
It dissipates, causes the collapsing of the borehole wall.Therefore intrusion volume of the drilling fluid filtrate to stratum should be reduced to the greatest extent, to guarantee the steady of the borehole wall
It is fixed.
It is the difference of the water chemistry gesture between drilling fluid and shale from drilling fluid to the power of shale driving water in drilling process,
The principal element for influencing it is the difference and the ratio between drilling liquid water activity and shale water activity of drilling liquid pressure and pore pressure.Only
There are when the semi-permeable membrane of greater efficiency, the water activity difference of drilling fluid and shale could control the migration of water in a long time.It grinds
Study carefully and shows that mud shale itself can be used as a kind of semi-permeable membrane, but a kind of nonideal semi-permeable membrane, membrane efficiency are not 100%, it can
The membrane efficiency of mud shale is improved by the way that extraordinary inorganic agent is added.Oil base drilling fluid has comparatively ideal membrane efficiency.It improves at present
The means of water-base drilling fluid membrane efficiency are mainly realized by the way that inorganic salts, organic salt reduction water activity is added, and are subtracted to play
Delay the purpose of Shale Hydration expansion, stabilizing borehole.But the addition of salt would generally be affected to property of drilling fluid, be unfavorable for rheology
The regulation of property and filtration property, and excessively salty use can impact ecological environment.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of above-mentioned technology, a kind of not saliferous, environmental sound are provided, had good
Stabilization shale formation borehole wall function low-activity alcohol base drilling fluid and its preparation method.
Technical solution of the present invention includes:
A kind of low-activity alcohol base drilling fluid, raw material contain in parts by weight: 45-70 parts of small molecule polyol, water 20-45
Part, 0.025-0.125 parts of sodium carbonate, 0.05-0.25 parts of caustic soda, 0.5-3.2 parts of sodium bentonite, high molecular polymer flocculant
0.1-0.5 parts, 2-5 parts of fluid loss additive, 3-6 parts of sealing agent, 0.05-0.1 parts of high-temperature stabilizer, 0.02-0.1 parts of defoaming agent, add
0-60 parts of heavy material.
The small molecule polyol is ethylene glycol, in glycerine, 1,2- propylene glycol, mannitol, xylitol, sorbierite
It is one or more of；The high molecular polymer flocculant is polyacrylamide dry powder (PAM), polyacrylic acid potassium (KPAM), two
One or more of property ionomer coating agent (FA-367)；The fluid loss additive is the low viscous drop of sodium carboxymethylcellulose-
Fluid loss agents, modified starch, natural polymer fluid loss additive, co-polymer of sulfonate fluid loss additive, one in sulfonated-pheno-formoldehyde resin
Kind is several；The sealing agent is the compound of several varigrained calcium carbonate superfine powder mixtures and nanometer calcium carbonate；It is described
High-temperature stabilizer is one or both of triethanolamine, diethanol amine, isothiazolinone；The defoaming agent be glycerin polyether,
At least one of tributyl phosphate, silicon ether oil, methyl-silicone oil；The weighting material includes blanc fixe, agstone, iron ore
One or more of powder, galena powder.
It is 400 mesh, 800 mesh, 1500 mesh, 2500 mesh, 6000 that calcium carbonate superfine powder mixture, which includes granularity, in the sealing agent
Three to five kinds in mesh.
The preparation method of aforementioned low-activity alcohol base drilling fluid includes:
(1) sodium carbonate is added in water, is sufficiently stirred, sodium bentonite is then added, is sufficiently stirred, aging 20-30h is obtained
Bentonite base slurry；
(2) small molecule polyol is added in prepared above-mentioned bentonite base slurry, is sufficiently stirred；
(3) caustic soda, high molecular polymer flocculant, fluid loss additive, sealing agent, defoaming agent and weighting material are sequentially added；
Wherein often add after a kind of material high-speed stirred 15-25min again plus under a kind of material.
The present invention has the advantage that the low-activity alcohol base drilling fluid had not only had lower activity, but also there is no salt
The addition of substance, drilling fluid rheology and filtration property are easy to regulate and control and will not generate injury to environment, are a kind of environment-friendly types
Drilling fluid system.In mud shale stratum drilling, the lower activity of the drilling fluid system is conducive to improve the film of mud shale stratum
Efficiency reduces the intrusion of drilling fluid filtrate, is conducive to wellbore stability.
Specific embodiment
Below by embodiment, the invention will be further described, but the present invention is not limited only to these examples.
A kind of low-activity alcohol base drilling fluid, raw material contain in parts by weight: 45-70 parts of small molecule polyol, water 20-45
Part, 0.025-0.125 parts of sodium carbonate, 0.05-0.25 parts of caustic soda, 0.5-3.2 parts of sodium bentonite, high molecular polymer flocculant
0.1-0.5 parts, 2-5 parts of fluid loss additive, 3-6 parts of sealing agent, 0.05-0.1 parts of high-temperature stabilizer, 0.02-0.1 parts of defoaming agent, add
0-60 parts of heavy material.
The high molecular polymer flocculant is polyacrylamide dry powder PAM, polyacrylic acid potassium KPAM, amphoteric ion gather
Close one or more of object coating agent FA-367.
The small molecule polyol is ethylene glycol, in glycerine, 1,2- propylene glycol, mannitol, xylitol, sorbierite
It is one or more of.
The fluid loss additive is the low viscous fluid loss additive of sodium carboxymethylcellulose-, modified starch, natural polymer filtrate reducing
One or more of agent, co-polymer of sulfonate fluid loss additive, sulfonated-pheno-formoldehyde resin.
The sealing agent is the compound of several varigrained calcium carbonate superfine powder mixtures and nanometer calcium carbonate, ultra-fine carbon
Sour calcium compound includes that granularity is in the calcium carbonate superfine powders of five kinds of mesh numbers such as 400 mesh, 800 mesh, 1500 mesh, 2500 mesh, 6000 mesh
Three to five kinds.
The high-temperature stabilizer is one or both of triethanolamine, diethanol amine, isothiazolinone.
The defoaming agent is at least one of glycerin polyether, tributyl phosphate, silicon ether oil, methyl-silicone oil.
The weighting material includes one or more of blanc fixe, agstone, Iron Ore Powder, galena powder.
The preparation method of low-activity alcohol base drilling fluid of the invention is: (1) sodium carbonate being added in water, is sufficiently stirred, so
After sodium bentonite is added, be sufficiently stirred, aging is for 24 hours.(2) by small molecule polyol and prepared bentonite base slurry by required
Amount mixing, is sufficiently stirred；(3) caustic soda, high molecular polymer flocculant, fluid loss additive, sealing agent, height are sequentially added in the desired amount
Warm stabilizer, defoaming agent and heavy weight additive, often add after a kind of material high-speed stirred 20min again plus under a kind of material.
Embodiment 1
(1) weight is added in the water that weight is 45 parts is 0.1 part of sodium carbonate, is sufficiently stirred, and weight is then added and is
1.35 parts of sodium bentonite, is sufficiently stirred, and aging obtains bentonite base slurry for 24 hours.(2) by glycerine and prepared bentonite base
Slurry mixes to obtain drilling well liquid-based slurry by weight 45:45, is sufficiently stirred；(3) by weight, 0.05 part of caustic soda, 0.1 are sequentially added
Part polyacrylamide dry powder PAM, the low viscous fluid loss additive of 1 part of sodium carboxymethylcellulose-, 3 parts of sulfonated-pheno-formoldehyde resins, 3 parts of closure
Agent (wherein 400 mesh, 1500 mesh, 2500 mesh calcium carbonate superfine powders and nanometer calcium carbonate by weight 3:3:2:2 compound), 0.05 part it is different
Thiazolinone, 0.02 part of tributyl phosphate and 2.82 parts of heavy weight additives often add again plus next after a kind of material high-speed stirred 20min
Kind material.
Rheological property and the middle pressure before and after prepared low-activity alcohol base drilling fluid rolling aging are determined according to API standard
Filter loss, experimental result are shown in Table 1.
The property of drilling fluid that 1 embodiment 1 of table is prepared
Embodiment 2
(1) weight is added in the water that weight is 20 parts is 0.04 part of sodium carbonate, is sufficiently stirred, and weight is then added and is
0.8 part of sodium bentonite, is sufficiently stirred, and aging 20h obtains bentonite base slurry.(2) by ethylene glycol and prepared bentonite base
Slurry mixes to obtain drilling well liquid-based slurry by weight 46:40, is sufficiently stirred；(3) by weight, 0.05 part of caustic soda, 0.2 are sequentially added
Part polyacrylic acid potassium, the low viscous fluid loss additive of 1 part of sodium carboxymethylcellulose-, 1 portion of co-polymer of sulfonate fluid loss additive, 3 parts of sulphur methyl
Phenolic resin, 4 parts of sealing agents (wherein 800 mesh, 2500 mesh, 6000 mesh calcium carbonate superfine powders and nanometer calcium carbonate are by weight 3:2:
3:2 compounding), 0.03 part of diethanol amine, 0.05 part of triethanolamine, 0.05 part of methyl-silicone oil and 4.76 parts of heavy weight additives, often add one
A kind of material under adding again after kind material high-speed stirred 20min.
Rheological property and the middle pressure before and after prepared low-activity alcohol base drilling fluid rolling aging are determined according to API standard
Filter loss, experimental result are shown in Table 2.
The property of drilling fluid that 2 embodiment 2 of table is prepared
Embodiment 3
(1) weight is added in the water that weight is 30 parts is 0.08 part of sodium carbonate, is sufficiently stirred, and weight is then added and is
1.5 parts of sodium bentonite, is sufficiently stirred, aging 20h.(2) 1,2- propylene glycol and prepared bentonite base are starched by weight
Drilling well liquid-based slurry is mixed to obtain than 60:30, is sufficiently stirred；(3) by weight, 0.2 part of caustic soda, 0.3 part of polypropylene are sequentially added
Sour potassium, 0.1 part of amphoteric ion polymer coating agent FA-367,1.5 portions of modified starches, 0.5 portion of co-polymer of sulfonate fluid loss additive,
3 parts of sulfonated-pheno-formoldehyde resins, (wherein 800 mesh, 1500 mesh, 2500 mesh calcium carbonate superfine powders and nanometer calcium carbonate are by weight for 3 parts of sealing agents
Amount is compounded than 4:3:2:1), 0.1 part of triethanolamine, 0.1 part of glycerin polyether and 1.2 parts of heavy weight additives, often add a kind of material high speed
A kind of material under adding again after stirring 20min.
Rheological property and the middle pressure before and after prepared low-activity alcohol base drilling fluid rolling aging are determined according to API standard
Filter loss, experimental result are shown in Table 3.
The property of drilling fluid that 3 embodiment 3 of table is prepared
Claims (4)
1. a kind of low-activity alcohol base drilling fluid, it is characterised in that raw material contains in parts by weight: 45-70 parts of small molecule polyol,
20-45 parts of water, 0.025-0.125 parts of sodium carbonate, 0.05-0.25 parts of caustic soda, 0.5-3.2 parts of sodium bentonite, high molecular polymerization
0.1-0.5 parts of object flocculant, 2-5 parts of fluid loss additive, 3-6 parts of sealing agent, 0.05-0.1 parts of high-temperature stabilizer, defoaming agent 0.02-
0.1 part, 0-60 parts of weighting material.
2. a kind of low-activity alcohol base drilling fluid according to claim 1, it is characterised in that: the small molecule polyol is
One or more of ethylene glycol, glycerine, 1,2- propylene glycol, mannitol, xylitol, sorbierite；The high molecular polymerization
Object flocculant is one or more of polyacrylamide dry powder, polyacrylic acid potassium, amphoteric ion polymer coating agent；The drop
Fluid loss agents are the low viscous fluid loss additive of sodium carboxymethylcellulose-, modified starch, natural polymer fluid loss additive, co-polymer of sulfonate
One or more of fluid loss additive, sulfonated-pheno-formoldehyde resin；The sealing agent is mixed for several varigrained calcium carbonate superfine powders
Close the compound of object and nanometer calcium carbonate；The high-temperature stabilizer is one of triethanolamine, diethanol amine, isothiazolinone
Or two kinds；The defoaming agent is at least one of glycerin polyether, tributyl phosphate, silicon ether oil, methyl-silicone oil；The exacerbation material
Material includes one or more of blanc fixe, agstone, Iron Ore Powder, galena powder.
3. a kind of low-activity alcohol base drilling fluid according to claim 2, it is characterised in that: ultra-fine carbonic acid in the sealing agent
Calcium compound includes that granularity is three to five kinds in 400 mesh, 800 mesh, 1500 mesh, 2500 mesh, 6000 mesh.
4. according to claim 1 or a kind of preparation method of low-activity alcohol base drilling fluid described in 2,3, it is characterised in that:
(1) sodium carbonate is added in water, is sufficiently stirred, sodium bentonite is then added, is sufficiently stirred, aging 20-30h obtains swelling
Soil matrix slurry；
(2) small molecule polyol is added in prepared above-mentioned bentonite base slurry, is sufficiently stirred；
(3) caustic soda, high molecular polymer flocculant, fluid loss additive, sealing agent, defoaming agent and weighting material are sequentially added；Wherein
Often add after a kind of material high-speed stirred 15-25min again plus under a kind of material.
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| CN201810020341.3A CN110016326A (en) | 2018-01-09 | 2018-01-09 | A kind of low-activity alcohol base drilling fluid and its preparation method |
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| CN201810020341.3A CN110016326A (en) | 2018-01-09 | 2018-01-09 | A kind of low-activity alcohol base drilling fluid and its preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114574177A (en) * | 2022-03-25 | 2022-06-03 | 库尔勒同益工贸有限责任公司 | Mud cake synergist for drilling fluid and preparation method thereof |
| CN114634800A (en) * | 2022-03-06 | 2022-06-17 | 湖南飞来峰非金属矿物材料有限公司 | Efficient drilling grade bentonite and additive thereof |
| CN115490498A (en) * | 2022-08-22 | 2022-12-20 | 句容康泰膨润土有限公司 | Rapidly solidified bentonite environment-friendly material and preparation method thereof |
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