CN109575888A - It is a kind of without native phase cationic water base drilling fluid and preparation method thereof - Google Patents
It is a kind of without native phase cationic water base drilling fluid and preparation method thereof Download PDFInfo
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- CN109575888A CN109575888A CN201710894191.4A CN201710894191A CN109575888A CN 109575888 A CN109575888 A CN 109575888A CN 201710894191 A CN201710894191 A CN 201710894191A CN 109575888 A CN109575888 A CN 109575888A
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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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
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Abstract
The invention discloses a kind of without native phase cationic water base drilling fluid and preparation method thereof, including water, thickening extracting and cutting agent, cationic inhibitor, cationic coating agent, fluid loss additive, lubricant, calcium carbonate superfine powder, heavy weight additive.On the basis of water: the dosage for viscosifying extracting and cutting agent is 0.05-0.5%(w/v)；The dosage of cationic inhibitor is 1-2% (v/v)；The dosage of cationic coating agent is 0.1-0.3% (w/v)；The dosage of fluid loss additive is 2-3% (w/v)；The dosage of lubricant is 1-3% (v/v)；The dosage of calcium carbonate superfine powder is 5-10%(w/v).Water-base drilling fluid of the invention has good rejection, greasy property, filtrate loss controllability, is conducive to borehole wall reinforcing, reduces borehole well instability, chip off-falling, collapses and the generation of bit freezing.
Description
Technical field
The invention belongs to petroleum drilling technology fields, and in particular to a kind of without native phase cationic water base drilling fluid and its preparation
Method.
Background technique
With the development of Petroleum finance, drilling strata is more and more complicated, and extended reach well, horizontal well, more surveys are bored
The quantity of well especially slim hole deep-well gradually increases.Extended reach well, the difficulty of construction of horizontal well and drilling fluid system is wanted
Ask will considerably beyond vertical well and directional well, horizontal well, extended reach well drilling fluid system should have better low shear rate viscous
Degree and shear thinning behavior are to guarantee the prop-carrying capacity of drilling fluid；With higher temperature resistance ability；With good inhibition,
The dispersion for effectively inhibiting clay in stratum, reduces the solid concentration in drilling fluid, improves the stability of the borehole wall；With good profit
Slip reduces frictional resistance, it is ensured that the greasy property of drilling fluid prevents occurring dragging pressure phenomenon in orientation process, improves power auger
Speed；In conclusion the drilling fluid system of extended reach well, horizontal well should have good rheological property, temperature resistance ability, stronger suppression
Property and lubricity processed.
The stability of clay mineral and its electro kinetic potential have very big relationship, analyze the electronic electricity the reason for this is that clay mineral
Position controls the thickness of its diffusion layer and combines the quantity of water, once the electro kinetic potential of clay mineral changes, diffusion layer
Thickness and combine water quantity also change therewith, so as to cause clay mineral dispersion, expansion, shrink or collapse, stablize
Property reduce.
In drilling process, clay mineral is in contact with drilling fluid, and the electrical property of drilling fluid is inherently to the electricity of clay mineral
Electrokinetic potential impacts, to influence clay mineral stability.Current existing cationic polymer water-base drilling fluid is (hereinafter referred to as
" cationic drilling fluid ") it is a kind of novel water-based drilling fluid system to grow up the 1980s.Cationic drilling well
Liquid is to make flocculant with high-molecular cationic polymer, pressed down using small-molecular-weight cationic organic compound as mud shale
Preparation, and formed using some or all of inorganic agents such as fluid loss additive, tackifier, sealing agent, lubricant.High molecular weight
The mud shale inhibiting effect of the coating flocculation and small-molecular-weight cationic organic compound of cationic polymer combines,
So that cationic water base drilling fluid system compared with traditional anion water base drilling fluid system there is stronger inhibition (to inhibit
The aquation of contained clay mineral, expansion, decomposition in shale, to prevent well slough), it is steady that stratum is maintained to a certain extent
It is fixed, improve rate of penetration.
Low solid phase and clay-free drilling fluid system are more and more extensive used in the drilling well, and such drilling fluid can effectively inhibit
The dispersion of clay, the performance maintenance for protection oil-gas Layer, stabilizing borehole and drilling fluid is all highly beneficial.Solid Free is water base
There is no bentonite in drilling fluid, when boring chance mud shale stratum, even if there is a certain amount of clay aquation to disperse, to without the mutually water base brill of soil
The performance influence of well liquid is smaller, and a small amount of clay dispersion instead has some improvement to the rheological characteristic of drilling fluid.For with
Upper problem is a kind of without native mutually cationic water base drilling fluid system it is necessary to develop.
Summary of the invention
The purpose of the present invention is to provide a kind of without native phase cationic water base drilling fluid and preparation method thereof.
The present invention is to realize above-mentioned purpose by following technical solution.
A kind of cationic water base drilling fluid provided by the present invention, including water, thickening extracting and cutting agent, cationic inhibitor, sun
Ion coating agent, fluid loss additive, lubricant, calcium carbonate superfine powder, heavy weight additive.Wherein on the basis of water, (w/v) indicates that quality compares body
Product, i.e., how many quality additive for drilling fluid need to be added in 1 volume drilling fluid；(v/v) volume by volume, i.e. 1 volume drilling fluid are indicated
How many volume additive for drilling fluid need to be added:
The dosage for viscosifying extracting and cutting agent is 0.05-0.5%(w/v).
The dosage of cationic inhibitor is 1-2% (v/v).
The dosage of cationic coating agent is 0.1-0.3% (w/v).
The dosage of fluid loss additive is 2-3% (w/v).
The dosage of lubricant is 1-3% (w/v).
The dosage of calcium carbonate superfine powder is 5-10%(w/v).
Heavy weight additive dosage is adjusted according to the density of drilling fluid.
The thickening extracting and cutting agent is thickening extracting and cutting agent resistant to high temperatures, which is by acrylamide and to resist
Warm monomer is copolymerized.
The cation inhibitor is small cation inhibitor of the molecular weight in 100-300.
The coating agent is Low Molecular Weight Cationic Polyacrylamide, and molecular weight is in 20-50 ten thousand, and cationic degree is in 8-
15, there is coating flocculating effect, encapsulation action can be played to mud shale, be able to suppress the hydration swelling of mud shale, help to prevent
Only cave-in.
The fluid loss additive is compounding for polymer filtrate reducer and modified plant fibers fluid loss additive.
The lubricant is alkylolamides series lubricant agent, and effect is to enhance the lubricity of the water-base drilling fluid.
The mesh number of the calcium carbonate superfine powder is between 100-300 mesh.
It is described without native phase cationic water base drilling fluid the preparation method comprises the following steps: under the state that is sufficiently stirred successively to base slurry according to
Secondary addition fluid loss additive, thickening extracting and cutting agent, cationic coating agent, cationic inhibitor, lubricant, calcium carbonate superfine powder, last root
Appropriate heavy weight additive is added according to the density requirements of the water-base drilling fluid, obtains described without native phase cationic water base drilling fluid.
Profitable fruit of the invention and feature:
(1) drilling fluid of the invention has stronger inhibition, and the dispersion of mud shale is able to suppress in drilling.
(2) drilling fluid of the invention has good lubricity, can effectively improve drilling efficiency, reduce the hair of down-hole accident
It is raw.
(3) drilling fluid of the invention has good filtration reduction.
(4) drilling fluid system temperature resistance of the present invention is good, has well solved the weak disadvantage of water-base drilling fluid temperature resistance ability.
Specific embodiment
In order to better understand the present invention, the content of invention is furtherd elucidate below with reference to embodiment, but of the invention interior
Appearance is not limited only to the following examples.
Embodiment 1
1% polymer filtrate reducer, 2% improved plant rubber powder, 0.1% resistant to high temperatures is successively added into water under high-speed stirred state
Viscosify extracting and cutting agent, 0.5% cationic polyacrylamide (molecular weight 200,000, cationic degree 8), 1% cationic inhibitor, 1.5% alcohol acyl
Amine lubricant, 6%100-300 mesh calcium carbonate superfine powder, finally with the density of blanc fixe weighted drilling fluid system to 1.05g/cm3,
It obtains described without native phase cationic water base drilling fluid 1#。
Embodiment 2
0.5% polymer filtrate reducer, 2.5% improved plant rubber powder, 0.2% anti-is successively added into water under high-speed stirred state
High temperature viscosify extracting and cutting agent, 0.3% cationic polyacrylamide (molecular weight 400,000, cationic degree 7.5), 1% cationic inhibitor,
1.5% alkylolamides lubricant, 6%100-300 mesh calcium carbonate superfine powder, finally extremely with the density of blanc fixe weighted drilling fluid system
1.2g/cm3It obtains described without native phase cationic water base drilling fluid 2#。
Embodiment 3
0.5% polymer filtrate reducer, 1.5% improved plant rubber powder, 0.15% anti-is successively added into water under high-speed stirred state
High temperature viscosifies extracting and cutting agent, 0.5% cationic polyacrylamide (molecular weight 300,000, cationic degree 6), 1.5% cationic inhibitor, 2%
Alkylolamides lubricant, 8%100-300 mesh calcium carbonate superfine powder are eventually adding the density of blanc fixe weighted drilling fluid system extremely
1.08g/cm3, obtain the Solid Free cationic water base drilling fluid 3#。
Embodiment 4
1% polymer filtrate reducer, 2% improved plant rubber powder, 0.1% resistant to high temperatures is successively added into water under high-speed stirred state
Viscosify extracting and cutting agent, 0.5% cationic polyacrylamide (molecular weight 200,000, cationic degree 8), 1% cationic inhibitor, 1.5% alcohol acyl
Amine lubricant, 6%100-300 mesh calcium carbonate superfine powder, finally with the density of blanc fixe weighted drilling fluid system to 1.05g/cm3,
It obtains described without native phase cationic water base drilling fluid 4#。
Embodiment 5
1% polymer filtrate reducer, 1% improved plant rubber powder, 0.3% resistant to high temperatures is successively added into water under high-speed stirred state
Viscosify extracting and cutting agent, 0.5% cationic polyacrylamide (molecular weight 200,000, cationic degree 8), 1% cationic inhibitor, 1.5% alcohol acyl
Amine lubricant, 6%100-300 mesh calcium carbonate superfine powder, finally with the density of blanc fixe weighted drilling fluid system to 1.8g/cm3,
It obtains described without native phase cationic water base drilling fluid 5#。
Embodiment 6
1% polymer filtrate reducer, 2% improved plant rubber powder, 0.1% resistant to high temperatures is successively added into water under high-speed stirred state
Viscosify extracting and cutting agent, 0.5% cationic polyacrylamide (molecular weight 350,000, cationic degree 8), 1% cationic inhibitor, 3% alkylolamides
Lubricant, 10%100-300 mesh calcium carbonate superfine powder, finally with the density of blanc fixe weighted drilling fluid system to 1.5g/cm3, obtain
It obtains described without native phase cationic water base drilling fluid 6#。
Embodiment 7
(1) rheological property and dehydration performance evaluation
The cationic water base drilling fluid for taking above-described embodiment 1~6 to prepare tests water-based drilling using six fast rotational viscometers
The rheological property of liquid；Using drilling fluid use in press filter press test system 30min middle pressure fluid loss (API dehydration)；Utilize height
Warm high pressure filtration device measures high temperature and high pressure filter loss.Test condition is room temperature and rolls 16h through 160 DEG C of heat.
(2) rejection is evaluated
The water-base drilling fluid for taking above-described embodiment 1~6 to prepare is tested by landwaste rolling rate of recovery to its rejection
It is tested, test condition is that 160 DEG C of heat roll 16h.
(3) Evaluation of Lubrication
The water-base drilling fluid for taking above-described embodiment 1~6 to prepare is surveyed lubricating coefficient using Fann21200 extreme boundary lubrication instrument, is commented
The greasy property of valence system, test condition are room temperature and roll 16h through 160 DEG C of heat.Test result such as table 1.
1 cationic water base drilling fluid system the performance test results of table
It is by the data of table 1 it can be found that provided by the invention without native phase water-base drilling fluid, while with good fluidity
Ratio of dynamic shear force/yield value to plastic viscosity with higher is conducive to the suspension and carrying of landwaste；Water-base drilling fluid landwaste rolling rate of recovery provided by the invention
>=99%, stronger rejection is embodied, borehole wall reinforcing, the generation for reducing borehole well instability and chip off-falling, collapsing, lubrication are conducive to
Coefficient meets the requirement of site operation less than 0.09.
Claims (8)
1. a kind of without native phase cationic water base drilling fluid, it is characterised in that the cationic water base drilling fluid include water, thickening mention
Cut agent, cationic inhibitor, cationic coating agent, fluid loss additive, lubricant, calcium carbonate superfine powder, heavy weight additive；On the basis of water:
The dosage for viscosifying extracting and cutting agent is 0.05-0.5%(w/v)；The dosage of cationic inhibitor is 1-2% (v/v)；Cationic coating agent
Dosage be 0.1-0.3% (w/v)；The dosage of fluid loss additive is 2-3% (w/v)；The dosage of lubricant is 1-3% (v/v)；It is super
The dosage of thin calcium carbonate is 5-10%(w/v)；Heavy weight additive dosage is adjusted according to the density of drilling fluid.
2. according to claim 1 a kind of without native phase cationic water base drilling fluid, it is characterised in that the thickening extracting and cutting agent
For thickening extracting and cutting agent resistant to high temperatures, which be copolymerized by acrylamide and temperature resistance monomer.
3. according to claim 1 a kind of without native phase cationic water base drilling fluid, it is characterised in that the cation inhibits
Agent is small cation inhibitor of the molecular weight in 100-300.
4. according to claim 1 a kind of without native phase cationic water base drilling fluid, it is characterised in that the coating agent is low
Molecular weight cationic polyacrylamide, molecular weight have coating flocculating effect, to mud in 8-15 in 20-50 ten thousand, cationic degree
Shale plays encapsulation action, inhibits the hydration swelling of mud shale, helps prevent cave-in.
5. according to claim 1 a kind of without native phase cationic water base drilling fluid, it is characterised in that the fluid loss additive is
The mixture of polymer filtrate reducer and modified plant fibers fluid loss additive.
6. according to claim 1 a kind of without native phase cationic water base drilling fluid, it is characterised in that the lubricant is alcohol
Amide series lubricant agent, for enhancing the lubricity of the water-base drilling fluid.
7. according to claim 1 a kind of without native phase cationic water base drilling fluid, it is characterised in that the calcium carbonate superfine powder
Mesh number be 100-300 mesh.
8. a kind of preparation method without native phase cationic water base drilling fluid according to claim 1, it is characterised in that: filling
Successively sequentially added into base slurry under point stirring fluid loss additive thickening extracting and cutting agent, cationic coating agent, cationic inhibitor,
Finally appropriate heavy weight additive is added according to the density requirements of the water-base drilling fluid in lubricant, calcium carbonate superfine powder, obtain the sun from
Sub- water-base drilling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710894191.4A CN109575888A (en) | 2017-09-28 | 2017-09-28 | It is a kind of without native phase cationic water base drilling fluid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710894191.4A CN109575888A (en) | 2017-09-28 | 2017-09-28 | It is a kind of without native phase cationic water base drilling fluid and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113736437A (en) * | 2020-05-27 | 2021-12-03 | 中石化南京化工研究院有限公司 | Environment-friendly water-based drilling fluid with strong inhibition and preparation method thereof |
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| CN106753286A (en) * | 2016-12-09 | 2017-05-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of viscous low solid phase environmental protection drilling fluid high and preparation method thereof |
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Patent Citations (6)
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| CN101864283A (en) * | 2009-12-11 | 2010-10-20 | 中国石油集团钻井工程技术研究院 | Water-based drilling fluid composition containing amine compound |
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Application publication date: 20190405 |