CN108485619A - A kind of hot dry rock drilling high temperature resistant drilling fluids and preparation method thereof - Google Patents
A kind of hot dry rock drilling high temperature resistant drilling fluids and preparation method thereof Download PDFInfo
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- CN108485619A CN108485619A CN201810401219.0A CN201810401219A CN108485619A CN 108485619 A CN108485619 A CN 108485619A CN 201810401219 A CN201810401219 A CN 201810401219A CN 108485619 A CN108485619 A CN 108485619A
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- high temperature
- hot dry
- temperature resistant
- dry rock
- drilling fluid
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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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention provides a kind of hot dry rocks to creep into high temperature resistant drilling fluids and preparation method thereof, and High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent or high temperature resistance tackified water retaining are contained in the drilling fluid.Hot dry rock of the present invention creeps into high temperature resistant drilling fluids, its heatproof is up to 200 DEG C, there is good rheological characteristic and lower filter loss under high-temperature and high-pressure conditions, good thermal stability, large rock-carrying ability are strong, the leakage-stop liquid prepared using the drilling fluid can play good plugging effect and have good compatibility, hot dry rock well wellbore construction requirement is met, is crept into especially suitable for crack broken formation, plugging effect is good.
Description
Technical field
The invention belongs to hot dry rock well drilling operation drilling fluid fields, are bored more particularly, to a kind of hot dry rock drilling high temperature resistance
Well liquid.
Background technology
Existing high temperature resistant drilling fluids are mainly oil, Gas Industry wellbore construction is used, and are bored in sedimentary rock formations mostly
Well construction, and hot dry rock well wellbore construction is all mainly gneiss, granite, granodiorite stratum, wellbore construction has spy
Different property.Wellbore is typically designed near fracture belt or on fracture belt, and heat storage formation temperature is high, part well section microfissure-crack is sent out
It educates or broken serious, there is the construction difficult problems such as leakage, water burst.Oil base drilling fluid, the water base sulfonate that current oil gas well drilling uses
Class drilling fluid etc. cannot effectively block heat storage stratum crushing crack, and that there are security risks is big, seriously polluted for oil base drilling fluid
Fatal problem.
Invention content
In view of this, the present invention is directed to propose a kind of hot dry rock creeps into high temperature resistant drilling fluids, to solve existing drilling fluid
Heat storage stratum crushing crack cannot effectively be blocked, and oil base drilling fluid there are security risks big, seriously polluted fatal problem.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of hot dry rock creeps into high temperature resistant drilling fluids, contains High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent or high temperature resistance in the drilling fluid
Tackified water retaining.
Further, the High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent is by raw material of lignite through more work(made of multistep graft modification
Energy composite additive, preferably the KJ-6 type High-temperature-resviscosity-reduction viscosity-reduction fluid loss agents of Zhengzhou Yu Hua auxiliary agents Co., Ltd production,
The high temperature resistance tackified water retaining is a variety of propylene, vinyl monomer through compound addition made of multi-component copolymer
The II type high temperature resistance tackified water retainings of SL- of agent, preferably Zhengzhou Yu Hua auxiliary agents Co., Ltd production.
Preferably, as mass fraction, High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent is contained in the drilling fluid：0.3~0.6%；
Contain high temperature resistance tackified water retaining in the drilling fluid：0.3~0.8%.
Further, in the drilling fluid, as mass fraction, each component content is as follows：
Sulfonated phenol formaldehyde resin 2~3%；
Sulfonated lignite resin 2~3%；
Sulfonated gilsonite 1~2%；
Polyacrylonitrile ammonium salt 0.3~0.8%；
High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent 0.3~0.6% or high temperature resistance tackified water retaining 0.3~0.8%；
Polyanion cellulose 0.2~0.8%；
Fluid lubricant 0~1%；
Soda ash 0.1~0.5%；
Sodium hydroxide 0~0.5%；
Sodium bentonite 3~12.5%；
Excess water.
Further, in the drilling fluid, as mass fraction：Sodium bentonite content is 3~5%.
Further, when leak stopping in drilling fluid, as mass fraction, sodium bentonite content is 5~7%；The viscous sealing agent of height
0.05~0.15%.
Further, when leak stopping in drilling fluid, as mass fraction, sodium bentonite is 8~10%；Also contain in drilling fluid
The viscous sealing agent 0.15~0.3% of height, fibrous sawdust 0.2~1%, Cortex walnut 1~5%.
Further, the component added when leak stopping is：
As mass fraction, sodium bentonite is 10.5~12.5%；Also contain agstone 0~10% in drilling fluid, it is high
Viscous sealing agent 0.2~1.3%；, fibrous sawdust 1~5%, sheet sawdust 2~8%；Cortex walnut 3~6%, Cortex walnut 0.2
The graininess of~5mm sizes.
Further, the high viscous sealing agent is：
A kind of preparation method of hot dry rock drilling high temperature resistant drilling fluids, includes the following steps：
S1：Base slurry is prepared
Water is added into slurry tank in proportion, soda ash, sodium bentonite are added while stirring, after continuing 2~4h of stirring, stops
Stirring, standing 16~for 24 hours；
S2：Drilling fluid is prepared
Start blender, sulfonated phenol formaldehyde resin, sulfonated lignite resin, sulfonated gilsonite, poly- the moon are added in being starched in proportion to base
Ion fiber element, polyacrylonitrile ammonium salt, High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent or high temperature resistance tackified water retaining and high viscous sealing agent,
Fluid lubricant, agstone, inertia expanding material continue to stir anti-to get a kind of hot dry rock drilling of the present invention after 2h
High temperature mud.
Compared with the existing technology, hot dry rock drilling high temperature resistant drilling fluids of the present invention have the advantage that：
Hot dry rock of the present invention creeps into high temperature resistant drilling fluids, and heatproof has up to 200 DEG C under high-temperature and high-pressure conditions
There are good rheological characteristic and lower filter loss, good thermal stability, large rock-carrying ability are strong, the leakage-stop liquid prepared using the drilling fluid
Good plugging effect can be played and there is good compatibility, meet hot dry rock well wellbore construction requirement, it is particularly suitable
In microfissure-creviced formation drilling, plugging effect is good.
Specific implementation mode
In addition to being defined, technical term used in following embodiment has universal with those skilled in the art of the invention
The identical meanings of understanding.Test reagent used in following embodiment is unless otherwise specified conventional biochemical reagent；It is described
Experimental method is unless otherwise specified conventional method.
With reference to embodiment, the present invention will be described in detail.
High temperature resistance tackified water retaining is that the II type high temperature resistances of SL- of Zhengzhou Yu Hua auxiliary agents Co., Ltd production increase in embodiment
Viscous fluid loss agent；Dehydration drops in the KJ-6 type High-temperature-resviscosity-reduction viscosity-reductions of High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent Zhengzhou Yu Hua auxiliary agents Co., Ltd production
Agent；Fluid lubricant produces for Yan'an affairs of state mud Co., Ltd；The viscous sealing agent of height produces for Yan'an affairs of state mud Co., Ltd；
Fibrous sawdust is long 1-7mm, diameter 0.2-1mm；Sheet sawdust be it is long and it is wide 0.2-10mm, thickness 0.1-1mm not
Regular sheet；Cortex walnut is the graininess of 0.2~5mm sizes.
Embodiment
Certain hot dry rock well designs well depth 4000m, is prospecting in mining well.Its drilling technology difficult point is：1. at well depth 600m
Bottom hole temperature (BHT) is up to 100 DEG C, full well section high temperature drilling, it is contemplated that bottom hole temperature (BHT) is up to 180 DEG C；2. heat storage stratum exists in various degree
Microfissure-crack, broken situation, successively repeatedly occur leakage, and plugging operations are carried out using the present invention, and the cost of material is low, blocks
It works well, achieves higher economic benefit.
(1) good ground well section is crept into, high temperature resistant drilling fluids application.Water is added into slurry tank in proportion, while stirring
Soda ash, sodium bentonite is added, after continuing 2~4h of stirring, stops stirring, standing 16~for 24 hours；Base slurry is made, is added in being starched to base：
Sulfonated phenol formaldehyde resin, sulfonated lignite resin, sulfonated gilsonite, high temperature resistance tackified water retaining, polyanion cellulose, hydrodynamic lubrication
Agent, polyacrylonitrile ammonium salt, up to drilling fluid after stirring evenly；
The content of each component is sodium bentonite 4%, soda ash 0.4%, sulfonated phenol formaldehyde resin in drilling fluid in this example
2.5%, sulfonated lignite resin 2.5%, sulfonated gilsonite 1%；High temperature resistance tackified water retaining 0.5%, polyanion cellulose
0.5%；Fluid lubricant 1%；Polyacrylonitrile ammonium salt 0.4%.
Performance indicator：Viscosity 38s, density 1.06g/cm3, API filtration 5ml/30min, HTHP filter loss about 15ml/
30min, mud cake thickness (API) 0.4mm, mud cake thickness (HTHP) 1.3mm, plastic viscosity 13mPas, yield value 6Pa, gel strength
4Pa, sand content 1%, pH value 8.
The high temperature resistant drilling fluids used in good ground well section drilling process, viscosity index 50s, API filtration are
When 10ml/30min, High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent is added according to 0.3% constituent content into the high temperature resistant drilling fluids.
(2) microfissure-cranny development or broken serious well section, high temperature resistance plugging drilling fluid application.
1. leaking speed about 3m3When/h, drilling fluid continuously adds sodium bentonite, polyanion cellulose, high viscous leak stopping in (1)
Agent, until the content of each component is sodium bentonite 6%, soda ash 0.4%, sulfonated phenol formaldehyde resin 2.5%, sulfonated lignite tree in drilling fluid
Fat 2.5%, sulfonated gilsonite 1%；High temperature resistance tackified water retaining 0.5%, polyanion cellulose 0.62%；Fluid lubricant
1%；Polyacrylonitrile ammonium salt 0.4%；Height glues sealing agent 0.05%.It prepares plugging while drilling and starches 30m3, implement to block up when boring, be pumped into
22m3When no consumption amount, leak stopping success.
2. leaking speed about 6m3When/h, drilling fluid continuously adds in (1)：Sodium bentonite is, high viscous sealing agent, threadiness are sawed
End, Cortex walnut；Content to each component in drilling fluid is sodium bentonite 9%, soda ash 0.4%, sulfonated phenol formaldehyde resin 2.5%, sulphur
Change walchowite 2.5%, sulfonated gilsonite 1%；High temperature resistance tackified water retaining 0.5%, polyanion cellulose 0.5%；Liquid
Lubricant 1%；Polyacrylonitrile ammonium salt 0.4%；The viscous sealing agent 0.2% of height, fibrous sawdust 0.3%, Cortex walnut 3%；It prepares stifled
Spillage 25m3, viscosity 70s, density 1.12g/cm3.It is blocked up when boring, is pumped into 19m3When no consumption amount, leak stopping success.Well temperature
135 DEG C, build the pressure 11.2MPa after the completion of leak stopping, does not miss.
3. leaking speed about 12m3/ h takes drilling fluid in a certain amount of (1) that sodium bentonite, agstone, fibrous sawdust, piece is added
Shape sawdust, Cortex walnut, high viscous sealing agent, until the content to each component in drilling fluid is sodium bentonite 11.5%, soda ash 0.4%,
Sulfonated phenol formaldehyde resin 2.5%, sulfonated lignite resin 2.5%, sulfonated gilsonite 1%；High temperature resistance tackified water retaining 0.5% gathers the moon
Ion fiber element 0.5%；Fluid lubricant 1%；Polyacrylonitrile ammonium salt 0.4%；Agstone 1.2%；Fibrous sawdust 2%；
Sheet sawdust 3%；Cortex walnut 6%；Height glues sealing agent 1.2%；Leak stopping slurry viscosity is prepared in 100s or more, is pumped into 40m3When without disappearing
Consumption, leak stopping success.154 DEG C of well temperature, build the pressure 11.5MPa after the completion of leak stopping, does not miss.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (10)
1. a kind of hot dry rock creeps into high temperature resistant drilling fluids, it is characterised in that：Dehydration drops containing High-temperature-resviscosity-reduction viscosity-reduction in the drilling fluid
Agent or high temperature resistance tackified water retaining.
2. hot dry rock according to claim 1 creeps into high temperature resistant drilling fluids, it is characterised in that：
The High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent is to be added by raw material of lignite through multifunctional and composite type made of multistep graft modification
Agent,
The high temperature resistance tackified water retaining is a variety of propylene, vinyl monomer through composite additive made of multi-component copolymer.
3. hot dry rock according to claim 2 creeps into high temperature resistant drilling fluids, it is characterised in that：
As mass fraction, High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent is contained in the drilling fluid：0.3~0.6%；
Contain high temperature resistance tackified water retaining in the drilling fluid：0.3~0.8%.
4. hot dry rock according to claim 1 creeps into high temperature resistant drilling fluids, it is characterised in that：
In the drilling fluid, as mass fraction, each component content is as follows：
Sulfonated phenol formaldehyde resin 2~3%；
Sulfonated lignite resin 2~3%；
Sulfonated gilsonite 1~2%；
Polyacrylonitrile ammonium salt 0.3~0.8%；
High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent 0.3~0.6% or high temperature resistance tackified water retaining 0.3~0.8%；
Polyanion cellulose 0.2~0.8%；
Fluid lubricant 0~1%；
Soda ash 0.1~0.5%；
Sodium hydroxide 0~0.5%；
Sodium bentonite 3~12.5%；
Excess water.
5. hot dry rock according to claim 4 creeps into high temperature resistant drilling fluids, it is characterised in that：In the drilling fluid, by matter
Measure score meter：Sodium bentonite content is 3~5%.
6. hot dry rock according to claim 4 creeps into high temperature resistant drilling fluids, it is characterised in that：When leak stopping in drilling fluid, press
Mass fraction meter, sodium bentonite content are 5~7%；Height glues sealing agent 0.05~0.15%.
7. hot dry rock according to claim 4 creeps into high temperature resistant drilling fluids, it is characterised in that：When leak stopping in drilling fluid, press
Mass fraction meter, sodium bentonite are 8~10%；Also contain high viscous sealing agent 0.15~0.3%, fibrous sawdust in drilling fluid
0.2~1%, Cortex walnut 1~5%.
8. hot dry rock according to claim 4 creeps into high temperature resistant drilling fluids, it is characterised in that the component added when leak stopping is：
As mass fraction, sodium bentonite is 10.5~12.5%；Also contain agstone 0~10% in drilling fluid, height is viscous stifled
Leak agent 0.2~1.3%；, fibrous sawdust 1~5%, sheet sawdust 2~8%；Cortex walnut 3~6%.
9. claim 6-8 any one of them hot dry rocks creep into the preparation method of high temperature resistant drilling fluids, it is characterised in that：It is described
The viscous sealing agent of height is formed by xanthans, hydroxyethyl cellulose and cationic polymerization graft copolymers.
10. a kind of preparation method of hot dry rock drilling high temperature resistant drilling fluids, it is characterised in that：Include the following steps：
S1：Base slurry is prepared
Water is added into slurry tank in proportion, soda ash, sodium bentonite are added while stirring, after continuing 2~4h of stirring, stops stirring
It mixes, standing 16~for 24 hours；
S2：Drilling fluid is prepared
Start blender, sulfonated phenol formaldehyde resin, sulfonated lignite resin, sulfonated gilsonite, polyanion is added in being starched in proportion to base
Cellulose, polyacrylonitrile ammonium salt, High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent or high temperature resistance tackified water retaining and high viscous sealing agent, liquid
Lubricant, agstone, inertia expanding material continue to stir and creep into high temperature resistance to get a kind of hot dry rock of the present invention after 2h
Drilling fluid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810401219.0A CN108485619A (en) | 2018-04-28 | 2018-04-28 | A kind of hot dry rock drilling high temperature resistant drilling fluids and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810401219.0A CN108485619A (en) | 2018-04-28 | 2018-04-28 | A kind of hot dry rock drilling high temperature resistant drilling fluids and preparation method thereof |
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| CN108485619A true CN108485619A (en) | 2018-09-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048289A (en) * | 2020-10-20 | 2020-12-08 | 河北省煤田地质局第二地质队 | High-salinity water-based drilling fluid and preparation method 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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| CN103160259A (en) * | 2013-04-03 | 2013-06-19 | 中国石油大学(华东) | 255 DEG C superhigh temperature resistant water-based drilling fluid and construction process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048289A (en) * | 2020-10-20 | 2020-12-08 | 河北省煤田地质局第二地质队 | High-salinity water-based drilling fluid and preparation method 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 |
| 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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Application publication date: 20180904 |