CN106520086A - Water-based drilling fluid for hot dry rocks and preparation method thereof - Google Patents
Water-based drilling fluid for hot dry rocks and preparation method thereof Download PDFInfo
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- CN106520086A CN106520086A CN201510578602.XA CN201510578602A CN106520086A CN 106520086 A CN106520086 A CN 106520086A CN 201510578602 A CN201510578602 A CN 201510578602A CN 106520086 A CN106520086 A CN 106520086A
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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
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
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Abstract
The invention provides a water-based drilling fluid for hot dry rocks and a preparation method thereof. The drilling fluid includes the following components according to a mass-volume ratio: 0.1%-1% of an alkali metal hydroxide; 2%-10% of sepiolite; 1%-10% of an inorganic tackifier; 1%-5% of a high temperature colloid protecting agent; 2%-10% of a high temperature filtration reducing agent; 2%-20% of special oil; 0.5%-2% of an emulsifier; 0.5%-5% of a high temperature stabilizer; 2%-60% of a drilling fluid weighting material; and the balance water. According to the invention, by adding the high temperature colloid protecting agent and the high temperature stabilizer into the drilling fluid, the water-based drilling fluid has temperature tolerance up to 260DEG C, can meet the operational requirements of ultra high temperature wells, and the system has a wide temperature application range, is suitable for construction work at different well sections, reduces the pipe column procedures, simplifies site construction operation and saves cost.
Description
Technical field
The present invention relates to resource exploration and technical field of petroleum extraction, open more particularly, to a kind of exploration
Send out hot dry rock drilling fluid of hot dry rock geothermal energy resources and preparation method thereof.
Background technology
Hot dry rock resource has a huge potentiality to be exploited, but due to hot dry rock exploration and development formation temperature compared with
, there is many science and engineering problem in exploration and development in height；So cause exploration and development subject matter
And difficult point is concentrated on high temperature, according to exploration and development demand, the requirement to drilling fluid is concentrated mainly on and overcomes
On the high temperature of hot dry rock.
Hot dry rock is mostly rotten or CRYSTALLINE ROCKS class rock mass, is not related to substantially water-sensitive strata, therefore, weight
Point only considers temperature resistance ability；At present, external high-temperature geothermal has reached more than 300 DEG C, water-base drilling fluid
260 DEG C are alreadyd exceed using temperature.Compared with foreign countries, domestic water-base drilling fluid resistance to extreme temperature is 220 DEG C；
It is at the early-stage in terms of superhigh temperature water base drilling fluid research, with live application side in terms of additive for drilling fluid
Also there is certain difference in face.
From the point of view of just developing at present, for the exploitation of dry-hot-rock geothermal well, in order to obtain the underground heat of higher temperature
Resource, obtains higher economic benefit, and this needs drilling fluid to have more preferable temperature resistance ability.And for water
The high temperature resistant research of base drilling fluid should surround inorganic agent development and the optimization of drilling fluid composition to carry out
The final temperature resistance ability for improving drilling fluid.
The content of the invention
In order to solve the problems referred to above of the prior art, the present invention proposes a kind of hot dry rock water-based drilling
Liquid and preparation method thereof.There is after the drilling fluids at high temperature is aging good rheological characteristic, vena caval filter ability；
And with stronger suspension stability, rejection is good, disclosure satisfy that the job requirements of superelevation hot-well, fit
Probing for hot dry rock well is developed.
The present invention proposes a kind of hot dry rock water-base drilling fluid, and the drilling fluid is included based on mass volume ratio
Following components：
Alkali metal hydroxide 0.1%-1%；
Meerschaum 2%-10%；
Inorganic tackifier 1%-10%；
High temperature colloid protecting resistance 1%-5%；
High temperature fluid loss additive 2%-10%；
Extraordinary oil 2%-20%；
Emulsifying agent 0.5%-2%；
High-temperature stabilizer 0.5%-5%；
Drilling fluid weighting material 2%-60%；
Solvent is water.
The present invention also provides a kind of preparation method for hot dry rock water-base drilling fluid, the method include by
Alkali metal hydroxide, meerschaum, inorganic tackifier, high temperature colloid protecting resistance, high temperature fluid loss additive, special type
Oil, emulsifying agent, high-temperature stabilizer, drilling fluid weighting material and water are mixed in proportion.
The present invention is by adding high temperature colloid protecting resistance and high-temperature stabilizer in drilling fluid so that water-base drilling fluid
Temperature resistance ability reach 260 DEG C, disclosure satisfy that the job requirements of superelevation hot-well, and the temperature of the system fitted
It is wide with scope, be adapted to the construction operation of difference well sections, reduce tubing string program, simplify Contraction in Site and
It is cost-effective.
Specific embodiment
The present invention provides a kind of hot dry rock water-base drilling fluid, and the drilling fluid is included based on mass volume ratio
Following components：
Alkali metal hydroxide 0.1%-1%；
Meerschaum 2%-10%；
Inorganic tackifier 1%-10%；
High temperature colloid protecting resistance 1%-5%；
High temperature fluid loss additive 2%-10%；
Extraordinary oil 2%-20%；
Emulsifying agent 0.5%-2%；
High-temperature stabilizer 0.5%-5%；
Drilling fluid weighting material 2%-60%；
Solvent is water.Each component sum is for absolutely.
Preferably, the drilling fluid includes the following components based on mass volume ratio：
Alkali metal compound 0.1%-0.5%；
Meerschaum 3%-5%；
Inorganic tackifier 3%-5%；
High temperature colloid protecting resistance 1%-3%；
High temperature fluid loss additive 2%-5%；
Extraordinary oil is 5%-10%；
Emulsifying agent is 0.5%-2%；
High-temperature stabilizer 1%-3%；
Drilling fluid weighting material 5%-50%；
Solvent is fresh water.
Heretofore described high temperature colloid protecting resistance be preferably 2- acrylamide-2-methyl propane sulfonics, acrylic acid, third
Acrylamide, Methacrylamide, acryloyl-oxy butyl sulfonic acid, methylacryoyloxyethyl trimethyl ammonia chloride
The multi-component copolymer that at least 2 kinds of monomers are synthesized by copolyreaction in ammonium and dimethyl diallyl ammonium chloride
Thing.The preparation method of the high temperature colloid protecting resistance can prepare multiple copolymer method for the routine of this area.
KOH or NaOH are dissolved in into wiring solution-forming in suitable quantity of water for example, then under agitation in proportion according to
Secondary addition 2- acrylamide-2-methyl propane sulfonics (AMPS), acryloyl-oxy butyl sulfonic acid (AOBS),
Acrylic acid (AA), acrylamide (AM) so as to lead to nitrogen 30-60min after fully dissolving, use 10%
The pH value of system is adjusted to 9-11 by KOH or NaOH solution, is warming up to 35-60 DEG C, adds initiator
(such as azodiisobutyronitrile), reacts 30-120min under agitation, obtains gel or solid, shaped is produced
Thing.Product dries pulverizing at 100-120 DEG C, obtains final product copolymer.
It is further preferred that it is 3-8 that the high temperature colloid protecting resistance is weight ratio:0.5-3:0.5-3:1 2- propylene
Amide -2- methyl propane sulfonic acids, acrylic acid, acrylamide and acryloyl-oxy butyl sulfonic acid are closed by copolyreaction
Into multiple copolymer；The weight is than preferably 4.5-6.5:1.5-2:1.5-2:1
Preferably, the alkali metal hydroxide is NaOH.
Preferably, montmorillonite of the inorganic tackifier for hydrophobically modified, the method for modifying are preferably table
Face activating agent is processed, and the surfactant is preferably quaternary ammonium salt cationic surfactant.Modified concrete side
Conventional method of the method for this area.
Preferably, the high temperature fluid loss additive is selected from sulfonated lignite resin, sulfonated phenol formaldehyde resin, oxidation drip
At least one in blue or green and emulsified asphalt.More preferably sulfonated lignite resin and sulfonated phenol formaldehyde resin
Mixture, the ratio of the two are preferably 1-3:1.
Preferably, the extraordinary oil is at least one in diesel oil, white oil and synthetic-based mud, further excellent
Elect white oil as.The concept that the synthetic-based mud is known in the art, can be for each of water-base drilling fluid
Plant synthetic-based mud, the preferably at least one in esters, ethers and poly alpha olefin.
Preferably, the drilling fluid weighting material is at least one in Calcium Carbonate, barite and bloodstone.
Preferably, during the high-temperature stabilizer is sulphite, sulfonate and nonionic surfactant
It is at least one；Wherein sulphite is sodium pyrosulfite, sodium sulfite, potassium metabisulfite and potassium sulfite
In at least one；Sulfonate is isethionate, hydroxylpropyl sulfonate and fatty alcohol-polyoxyethylene ether
At least one in sulfonate；Nonionic surfactant is alkylphenol polyoxyethylene, polyol type is non-
At least one in ionic surface active agent and alkyl hydrosulfide polyoxyethylene ether.
Preferably, the emulsifying agent is that weight ratio is 1:The glyceryl monostearate and anhydrous sorbitol of 1-5
The mixture of laurate, most preferably 1:1.25-1.35, wherein, the hydrophilic parent of glyceryl monostearate
Oily equilibrium valve (HLB) is 3.8, the hydrophile-lipophile balance value (HLB) of anhydrous sorbitol laurate
For 8.6.
The present invention also provides a kind of preparation method of hot dry rock water-base drilling fluid, and the method is included alkali gold
Category hydroxide, meerschaum, inorganic tackifier, high temperature colloid protecting resistance, high temperature fluid loss additive, extraordinary oil,
Emulsifying agent, high-temperature stabilizer, drilling fluid weighting material and water are mixed in proportion.
The preferred embodiment of the present invention is described in more detail below.There is provided these embodiments be in order to
Make the present invention more thorough and complete, and this area can be will fully convey the scope of the invention to
Technical staff.
Embodiment 1
The preparation of high temperature colloid protecting resistance
NaOH 5g are dissolved in into wiring solution-forming in 500ml water, it is then under agitation, single by table 1
Body proportioning sequentially adds 2- acrylamide-2-methyl propane sulfonics (AMPS), acryloyl-oxy butyl sulfonic acid
(AOBS), acrylic acid (AA), acrylamide (AM) so as to fully dissolve, lead to nitrogen 30min,
The pH value of system is adjusted to into 10 with 10%NaOH solution, 50 DEG C are warming up to, adds initiator (even
Nitrogen bis-isobutyronitrile), 90min is reacted under agitation, obtains gel or solid product.Product exists
Dries pulverizing at 120 DEG C, obtains final product copolymer inorganic agent.
According to above-mentioned reaction, several monomers of AM/AMPS/AOBS/AA are carried out according to the amount ratio of material
Different dosage proportioning reactions, correspondence copolymer are as shown in table 1 below.
1 different monomers proportioning situation (unit mol) of table
The copolymer that above-mentioned reaction is obtained, is added in 4wt% drilling fluid soil pastes, at 180 DEG C
After heat rolling 16h, its performance is tested, test result is shown in Table 2.
2 polymer performance of table is contrasted
6/ Φ of Φ 3 represent low velocity shear speed.
Before and after heat rolling, the less representative of sample determination value changes is more stable, knowable to Tables 1 and 2,2# copolymerization
Thing is minimum to soil paste performance impact, it is ensured that in soil paste, clay particle has enough adsorbances at high temperature
With thick hydration shell, effectively prevent the high temperature of clay particle from coalescing and being passivated.
Embodiment 2
Hot dry rock water base drilling fluid system Filtrate Loss Control
The present invention adopts fluid loss additive and emulsifying to block two aspects come the filter loss to the drilling fluid system
Evaluation is controlled, it is specific as follows：
(1) heat resisting fluid loss reducing agent evaluation
Heat resisting fluid loss reducing agent is sulfonated lignite resin, sulfonated phenol formaldehyde resin, oxidized asphalt and emulsified asphalt
In at least one.Following ratio is mass volume ratio, with water as solvent.
The formula of system 1 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive (sulfonated lignite resin).
The formula of system 2 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive (sulfonated phenol formaldehyde resin).
The formula of system 3 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive (oxidized asphalt).
The formula of system 4 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive (sulfonated lignite resin：Sulfonated phenol formaldehyde resin=2:1).
In 2 system 1,2,3,4 of embodiment, inorganic tackifier is montmorillonite through dodecyl front three
The hydrophobically modified viscosifier formed after the process of base ammonium bromide.High temperature colloid protecting resistance is the 2# that obtains in embodiment 1
Copolymer.
2 system of above-described embodiment, 1,2,3,4 formula is measured respectively, under the conditions of 260 DEG C, heat rolling
Performance before and after 16h, test result are shown in Table 3.
3 heat resisting fluid loss reducing agent evaluation of table
Find out from the experimental data of table 3, heat resisting fluid loss reducing agent is by sulfonated lignite resin and sulfonated phenolic
Resin is with 2:1 ratio is used cooperatively, and before rolling, after rolling, Parameters variation is minimum, and filter loss is minimum, effect effect
Fruit is more preferably.
(2) emulsifying seal-off effect is evaluated
Emulsifying plugging material is that extraordinary oil and emulsifying agent are constituted；Wherein extraordinary oil is diesel oil, white oil and synthesis
At least one of base fluid.Emulsifying agent is glyceryl monostearate that HLB value is 3.8 and HLB value is 8.6
Anhydrous sorbitol laurate press 1:The mixture of the amount of the material of 1-5.
Following ratio is mass volume ratio, with water as solvent.
The formula of system 5 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive；5% special type oil (diesel oil)；1% emulsifying agent is (single
Tristerin：Anhydrous sorbitol laurate=1:1)；2% high-temperature stabilizer；17% drilling well
Liquid weighting material.
The formula of system 6 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive；5% special type oil (white oil)；1% emulsifying agent is (single
Tristerin：Anhydrous sorbitol laurate=1:1)；2% high-temperature stabilizer；17% drilling well
Liquid weighting material.
The formula of system 7 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive；5% special type oil (white oil)；1% emulsifying agent is (single
Tristerin：Anhydrous sorbitol laurate=1:2)；2% high-temperature stabilizer；17% drilling well
Liquid weighting material.
The formula of system 8 is：0.3% NaOH；5% meerschaum；5% inorganic tackifier；2%
High temperature colloid protecting resistance；3% high temperature fluid loss additive；5% special type oil (white oil)；1% emulsifying agent is (single
Tristerin：Anhydrous sorbitol laurate=1:1.3)；2% high-temperature stabilizer；17% drilling well
Liquid weighting material.
In 2 system 5,6,7,8 of embodiment, inorganic tackifier is montmorillonite through dodecyl front three
The hydrophobically modified viscosifier formed after the process of base ammonium bromide.High temperature colloid protecting resistance is the 2# that obtains in embodiment 1
Copolymer.High temperature fluid loss additive is sulfonated lignite resin and sulfonated phenol formaldehyde resin with 2:What 1 ratio coordinated
Mixture.High-temperature stabilizer is aliphatic alcohol polyoxyethylene sulfonate and polyol type non-ionic surface active
The mixture of agent.Drilling fluid weighting material is limestone.
2 system of above-described embodiment, 5,6,7,8 formula is measured respectively, under the conditions of 260 DEG C, heat rolling
Performance after 16h, test result are shown in Table 4.
4 emulsifying of table closure is evaluated
Test temperature：50 DEG C of heat rolling temperature：260℃ HTHP：3.5MPa*180℃
Find out from the experimental data of table 4, extraordinary oil with white oil and emulsifying agent with glyceryl monostearate and
Anhydrous sorbitol laurate presses 1:The sample system 8 of the amount proportioning of 1.3 material, forms in drilling fluid
Emulsion has good plugging effect, it is possible to increase the vena caval filter of drilling fluid.
Embodiment 3
Hot dry rock is evaluated with water base drilling fluid system heat-resisting property
A kind of density is present embodiments provided for 1.1g/cm3Superhigh temperature water base drilling fluid, its formula are above-mentioned
The formula of 2 system of embodiment 8.
For above-mentioned formula, the present invention have rated rheological characteristic and leak-off under different temperatures after aging 16h
Can, the results are shown in Table 5.
5 temperature resistance evaluation of table
Test temperature：50℃ HTHP：3.5MPa*180℃
5 data display of table, drilling fluid rheological property after rolling through different high warms are preferable, filter loss
Controlled, wherein, YP/PV is referred to as ratio of dynamic shear force/yield value to plastic viscosity, represents the power of shear thinning behavior.Explanation system
Various materials serve effects, the synergistic action effect between inorganic agent substantially, improve the temperature resistance energy of system
Power.
From the point of view of above example, the temperature resistance ability of superhigh temperature water base drilling fluid reaches 260 DEG C, drilling fluid
There is after high temperature ageing good rheological characteristic, vena caval filter ability；And with stronger suspension stability,
Disclosure satisfy that the job requirements of superelevation hot-well.
Above example is only the exemplary embodiment of the present invention, is not used in the restriction present invention, of the invention
Protection domain is defined by the claims.
It is described above various embodiments of the present invention, described above is exemplary, and non-exclusive
, and it is also not necessarily limited to disclosed each embodiment.In the scope without departing from illustrated each embodiment and
In the case of spirit, many modifications and changes are all aobvious for those skilled in the art
And be clear to.The selection of term used herein, it is intended to best explain principle, the reality of each embodiment
Using or to the technological improvement in market, or be understood that other those of ordinary skill of the art
Each embodiment disclosed herein.
Claims (10)
1. a kind of hot dry rock water-base drilling fluid, it is characterised in that the drilling fluid is included by quality volume
Than the following components counted：
2. hot dry rock water-base drilling fluid according to claim 1, wherein, the drilling fluid includes
Following components based on mass volume ratio：
3. hot dry rock water-base drilling fluid according to claim 1, wherein, the high temperature protects glue
Agent is 2- acrylamide-2-methyl propane sulfonics, acrylic acid, acrylamide, Methacrylamide, acryloyl
In oxygen-butyl sulfonic acid, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and dimethyl diallyl ammonium chloride
The multiple copolymer that at least 2 kinds of monomers are synthesized by copolyreaction.
4. hot dry rock water-base drilling fluid according to claim 3, wherein, the high temperature protects glue
It is 3-8 that agent is weight ratio:0.5-3:0.5-3:1 2- acrylamide-2-methyl propane sulfonics, acrylic acid, propylene
The multiple copolymer that amide and acryloyl-oxy butyl sulfonic acid are synthesized by copolyreaction；The weight is than preferred
For 4.5-6.5:1.5-2:1.5-2:1.
5. the hot dry rock water-base drilling fluid according to any one in claim 1-4, wherein,
The alkali metal hydroxide is NaOH.
6. the hot dry rock water-base drilling fluid according to any one in claim 1-4, wherein,
The inorganic tackifier is the montmorillonite of hydrophobically modified；The method of modifying is preferably at surfactant
Reason；The surfactant is preferably quaternary ammonium salt cationic surfactant.
7. the hot dry rock water-base drilling fluid according to any one in claim 1-4, wherein,
The high temperature fluid loss additive is selected from sulfonated lignite resin, sulfonated phenol formaldehyde resin, oxidized asphalt and emulsified asphalt
In at least one；The extraordinary oil is at least one in diesel oil, white oil and synthetic-based mud；The brill
Well liquid weighting material is at least one in Calcium Carbonate, barite and bloodstone.
8. the hot dry rock water-base drilling fluid according to any one in claim 1-4, wherein,
The high-temperature stabilizer is at least one in sulphite, sulfonate and nonionic surfactant；Its
Sulfite salt is at least one in sodium pyrosulfite, sodium sulfite, potassium metabisulfite and potassium sulfite；
Sulfonate be isethionate, hydroxylpropyl sulfonate and aliphatic alcohol polyoxyethylene sulfonate at least
It is a kind of；Nonionic surfactant is alkylphenol polyoxyethylene, polyol-based non-ionic surfactant
With at least one in alkyl hydrosulfide polyoxyethylene ether.
9. the hot dry rock water-base drilling fluid according to any one in claim 1-4, wherein,
It is 1 that the emulsifying agent is weight ratio:The glyceryl monostearate and anhydrous sorbitol laurate of 1-5 it is mixed
Compound.
10. the preparation side of the hot dry rock water-base drilling fluid in a kind of claim 1-9 described in any one
Method, it is characterised in that the method is included alkali metal hydroxide, meerschaum, inorganic tackifier, height
Warm colloid protecting resistance, high temperature fluid loss additive, extraordinary oil, emulsifying agent, high-temperature stabilizer, drilling fluid weighting material
It is mixed in proportion with water.
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| CN112300764A (en) * | 2020-09-24 | 2021-02-02 | 中石化石油工程技术服务有限公司 | Foam formula for safe drilling of water-sensitive stratum and preparation method |
| CN112877044A (en) * | 2019-11-29 | 2021-06-01 | 中国石油化工股份有限公司 | Foam drilling fluid and preparation method and application thereof |
| CN114370267A (en) * | 2021-12-17 | 2022-04-19 | 核工业北京地质研究院 | Real-time calculation method for heat storage temperature of drill in drilling process of high-temperature geothermal field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114370267A (en) * | 2021-12-17 | 2022-04-19 | 核工业北京地质研究院 | Real-time calculation method for heat storage temperature of drill in drilling process of high-temperature geothermal field |
| CN114370267B (en) * | 2021-12-17 | 2023-06-13 | 核工业北京地质研究院 | Real-time calculation method for drilling heat storage temperature in high-temperature geothermal field drilling process |
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Inventor after: Jin Wenqian Inventor after: Wang Yanxin Inventor after: Xing Qian Inventor after: Hu Deyun Inventor after: Wang Jian Inventor after: Huang Wuyu Inventor before: Jin Wenqian Inventor before: Wang Yanxin Inventor before: Xing Qian Inventor before: Hu Deyun Inventor before: Wang Jian Inventor before: Huang Wuyu |