CN106867484A - Drilling fluid that a kind of oil field extracted water is prepared and preparation method thereof - Google Patents
Drilling fluid that a kind of oil field extracted water is prepared and preparation method thereof Download PDFInfo
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- CN106867484A CN106867484A CN201710206882.0A CN201710206882A CN106867484A CN 106867484 A CN106867484 A CN 106867484A CN 201710206882 A CN201710206882 A CN 201710206882A CN 106867484 A CN106867484 A CN 106867484A
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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
- C09K2208/02—Spotting, i.e. using additives for releasing a stuck drill
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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
Abstract
Drilling fluid prepared the invention provides a kind of oil field extracted water and preparation method thereof, including water and the following each component in terms of the mass percent for accounting for water：0.1~0.3% sulfur elimination, 0.1~0.3% calcium ions and magnesium ions remover, 0.3~0.5% salt resistance corrosion inhibiter, 0.2~0.3% carries stick, 0.2~0.5% flow pattern regulator, 0.2~0.3% flocculation coating agent, 0.8~1.1% fluid loss agent, 1~2% anti-sloughing agent, 2~5% fluid lubricants, 20~50% Solid weighting agents, the invention prepares drilling fluid for oil field water process provides a kind of new method using oil field extracted water, can reduce demand pressure of the drilling fluid to freshwater resources, reduces construction cost, oilfield economic benefit is improved, oil field Sustainable Exploitation is realized.
Description
Technical field
The present invention relates to oilfield drilling technical field, and in particular to drilling fluid and its system that a kind of oil field extracted water is prepared
Preparation Method.
Background technology
China major part oil field oneself enter oil exploitation mid-term and later stage, in Produced Liquid water content be 70%~
80%, some oil fields are even as high as 90%, and as the increase of recovery time, water content are continuously increased, cause each oil field institute
The wastewater flow rate of generation is very huge.According to the Changqing oilfields statistics of in December, 2014, OW daily output liquid 161161t, daily output
Crude oil 69064t, comprehensive water cut reaches 57.1%, and some blocks are aqueous or even reached more than 80%, if substantial amounts of extraction
Water is directly outer to be arranged, it will is caused very serious environmental pollution, and is wasted the water resource of preciousness.
In view of Changqing oilfields recovered water is more and more, discharge or inject stratum this situation increasing to environmental protection pressure,
Drilling fluid is prepared for oil field water process provides a kind of new method using oil extraction waste water, can reduce need of the drilling fluid to freshwater resources
Pressure is sought, construction cost is reduced, oilfield economic benefit is improved, oil field Sustainable Exploitation is realized
The content of the invention
The purpose of the present invention is to reduce the waste of oil field extracted water, there is provided a kind of drilling fluid that oil field extracted water is prepared and its
Preparation method, can reduce demand pressure of the drilling fluid to freshwater resources, reduce construction cost, improve oilfield economic benefit, realize
Oil field is sustainable to open.
The technical scheme is that the drilling fluid prepared there is provided a kind of oil field extracted water, including water and the matter to account for water
Measure the following each component of percentages：0.1~0.3% sulfur elimination, 0.1~0.3% calcium ions and magnesium ions remover, 0.3~0.5% resists
Salt corrosion inhibiter, 0.2~0.3% carries stick, 0.2~0.5% flow pattern regulator, 0.2~0.3% flocculation coating agent, 0.8~
1.1% fluid loss agent, 1~2% anti-sloughing agent, 2~5% fluid lubricants, 20~50% Solid weighting agents.
The water is oil field extracted water.
The sulfur elimination is sponge iron.
The calcium ions and magnesium ions remover is sodium carbonate.
The salt resistance corrosion inhibiter is salt resistance corrosion inhibiter KEJ.
For adhesive aggregation anionic cellulose PAC-HV high, apparent viscosity is >=50mPas to the stick that carries；The flow pattern is adjusted
Section agent is xanthans, and relative molecular mass is 2 × 106~2 × 107；The flocculation coating agent is polyacrylamide；The drop is lost
Aqua includes two kinds：Account for the low adhesive aggregation anionic cellulose PAC-LV of oil field extracted water mass percent 0.3% and account for oil field and adopt
The CMS of effluent characteristics percentage 0.5%, wherein low adhesive aggregation anionic cellulose PAC-LV apparent viscosities≤40mPa
S, CMS is CMS ASR-1；The anti-sloughing agent is sulfonated gilsonite G309-JLS；The fluid lubricant is profit
Lubrication prescription G303-WYR；The Solid weighting agents are blanc fixe.
A kind of preparation method of the drilling fluid that oil field extracted water is prepared, it is characterised in that：At least comprise the following steps：
Step one：The pretreatment of oil field extracted water；
Step 2：Alkalinity regulator, the pH value of regulation system are added in pretreated oil field extracted water in the step one
It is 8-9；
Step 3：Sequentially add and account for the mass percent 0.2~0.3% of oil field extracted water and carry stick, account for oil field extracted water
The flow pattern regulator of mass percent 0.2~0.5%, account for oil field extracted water mass percent 0.2~0.3% flocculation coating
Agent, accounts for the fluid loss agent of mass percent 0.8~1.1% of oil field extracted water, stirs 1~2 hour, dissolves it；
Step 4：The anti-sloughing agent of mass percent 1%~2% for accounting for oil field extracted water is added, after stirring, is finally added
Enter to account for the fluid lubricant of mass percent 2~5% of oil field extracted water, the mass percent 20~50% for accounting for oil field extracted water is consolidated
Body heavy weight additive, stirs.
The pretreatment of step one oil field extracted water is comprised the following steps：
Step 1) it is gradually added into oil field extracted water and accounts for the sulfur elimination of oil field extracted water mass percent 0.1~0.3%, stir
Mix uniform, and hydrogen sulfide content is detected with Lead acetate paper in adding procedure, when hydrogen sulfide content is zero, stop addition sulphur removal
Agent；
Step 2) in step 1) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.1~0.3%
Calcium ions and magnesium ions remover calcium ions and magnesium ions remover, stirs；
Step 3) in step 2) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.3~0.5%
Salt resistance corrosion inhibiter, stirs.
The alkalinity regulator is NaOH.
Beneficial effects of the present invention：
The drilling fluid that this oil field extracted water of the invention is prepared is prepared drilling fluid and is reduced by using oil field extracted water
Drilling cost, while alleviating celebrating regional water resources long shortage and oil field extracted water processing pressure, is gone from sulfur elimination, calcium ions and magnesium ions
Except agent and corrosion inhibiter non-toxic degradable inorganic agent treatment oil field extracted water, that is, meet environmental requirement, hydrogen sulfide will not be produced to hinder again
Evil, will not pollute stratum, can delay drill tool corrosion speed, and the drilling fluid system have high salinity highly inhibited and
Excellent caving-preventing characteristic and greasy property, can prevent the generation of bit freezing serious accident, disclosure satisfy that the peace of old street district horizontal well
Full construction requirement.
Specific embodiment
Embodiment 1：
In order to reduce the waste of oil field extracted water, the drilling fluid that a kind of oil field extracted water is prepared is present embodiments provided, bag
Include water and the following each component in terms of the mass percent for accounting for water：0.1~0.3% sulfur elimination, 0.1~0.3% calcium ions and magnesium ions go
Except agent, 0.3~0.5% salt resistance corrosion inhibiter, 0.2~0.3% carries stick, 0.2~0.5% flow pattern regulator, 0.2~0.3% wadding
Solidifying coating agent, 0.8~1.1% fluid loss agent, 1~2% anti-sloughing agent, 2~5% fluid lubricants, 20~50% Solid weighting agents,
Above material is commercially available.
A kind of preparation method of the drilling fluid that oil field extracted water is prepared, it is characterised in that：At least comprise the following steps：
Step one：The pretreatment of oil field extracted water：Comprise the following steps：
Step 1) it is gradually added into oil field extracted water and accounts for the sulfur elimination of oil field extracted water mass percent 0.1~0.3%, stir
Mix uniform, and hydrogen sulfide content is detected with Lead acetate paper in adding procedure, when hydrogen sulfide content is zero, stop addition sulphur removal
Agent；
Step 2) in step 1) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.1~0.3%
Calcium ions and magnesium ions remover calcium ions and magnesium ions remover, stirs；
Step 3) in step 2) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.3~0.5%
Salt resistance corrosion inhibiter, stirs.
Step 2：Alkalinity regulator, the pH value of regulation system are added in pretreated oil field extracted water in the step one
It is 8-9；
Step 3：Sequentially add and account for the mass percent 0.2~0.3% of oil field extracted water and carry stick, account for oil field extracted water
The flow pattern regulator of mass percent 0.2~0.5%, account for oil field extracted water mass percent 0.2~0.3% flocculation coating
Agent, accounts for the fluid loss agent of mass percent 0.8~1.1% of oil field extracted water, stirs 1~2 hour, dissolves it；
Step 4：The anti-sloughing agent of mass percent 1%~2% for accounting for oil field extracted water is added, after stirring, is finally added
Enter to account for the fluid lubricant of mass percent 2~5% of oil field extracted water, the mass percent 20~50% for accounting for oil field extracted water is consolidated
Body heavy weight additive, stirs.
The drilling fluid that this oil field extracted water of the invention is prepared is prepared drilling fluid and is reduced by using oil field extracted water
Drilling cost, while alleviating celebrating regional water resources long shortage and oil field extracted water processing pressure, is gone from sulfur elimination, calcium ions and magnesium ions
Except agent and corrosion inhibiter non-toxic degradable inorganic agent treatment oil field extracted water, that is, meet environmental requirement, hydrogen sulfide will not be produced to hinder again
Evil, will not pollute stratum, can delay drill tool corrosion speed, and the drilling fluid system have high salinity highly inhibited and
Excellent caving-preventing characteristic and greasy property, can prevent the generation of bit freezing serious accident, disclosure satisfy that the peace of old street district horizontal well
Full construction requirement.
Embodiment 2：
Present embodiments provide the drilling fluid that a kind of oil field extracted water is prepared, including water and in terms of the mass percent for accounting for water
Following each component：0.1~0.3% sulfur elimination, 0.1~0.3% calcium ions and magnesium ions remover, 0.3~0.5% salt resistance corrosion inhibiter,
0.2~0.3% proposes stick, 0.2~0.5% flow pattern regulator, 0.2~0.3% flocculation coating agent, 0.8~1.1% drop dehydration
Agent, 1~2% anti-sloughing agent, 2~5% fluid lubricants, 20~50% Solid weighting agents, above material is commercially available.
A kind of preparation method of the drilling fluid that oil field extracted water is prepared, it is characterised in that：At least comprise the following steps：
Step one：The pretreatment of oil field extracted water：Comprise the following steps：
Step 1) it is gradually added into oil field extracted water and accounts for the sulfur elimination of oil field extracted water mass percent 0.1~0.3%, stir
Mix uniform, and hydrogen sulfide content is detected with Lead acetate paper in adding procedure, when hydrogen sulfide content is zero, stop addition sulphur removal
Agent；
Step 2) in step 1) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.1~0.3%
Calcium ions and magnesium ions remover calcium ions and magnesium ions remover, stirs；
Step 3) in step 2) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.3~0.5%
Salt resistance corrosion inhibiter, stirs.
Step 2：Alkalinity regulator, the pH value of regulation system are added in pretreated oil field extracted water in the step one
It is 8-9；
Step 3：Sequentially add and account for the mass percent 0.2~0.3% of oil field extracted water and carry stick, account for oil field extracted water
The flow pattern regulator of mass percent 0.2~0.5%, account for oil field extracted water mass percent 0.2~0.3% flocculation coating
Agent, accounts for the fluid loss agent of mass percent 0.8~1.1% of oil field extracted water, stirs 1~2 hour, dissolves it；
Step 4：The anti-sloughing agent of mass percent 1%~2% for accounting for oil field extracted water is added, after stirring, is finally added
Enter to account for the fluid lubricant of mass percent 2~5% of oil field extracted water, the mass percent 20~50% for accounting for oil field extracted water is consolidated
Body heavy weight additive, stirs.
Wherein, the water is oil field extracted water.
The sulfur elimination is sponge iron.
The calcium ions and magnesium ions remover is sodium carbonate.
The salt resistance corrosion inhibiter is salt resistance corrosion inhibiter KEJ.
For adhesive aggregation anionic cellulose PAC-HV high, apparent viscosity is >=50mPas to the stick that carries；The flow pattern is adjusted
Section agent is xanthans, and relative molecular mass is 2 × 106~2 × 107；The flocculation coating agent is polyacrylamide；The drop is lost
Aqua includes two kinds：Account for the low adhesive aggregation anionic cellulose PAC-LV of oil field extracted water mass percent 0.3% and account for oil field and adopt
The CMS of effluent characteristics percentage 0.5%, wherein low adhesive aggregation anionic cellulose PAC-LV apparent viscosities≤40mPa
S, CMS is CMS ASR-1；The anti-sloughing agent is sulfonated gilsonite G309-JLS；The fluid lubricant is profit
Lubrication prescription G303-WYR；The Solid weighting agents are blanc fixe.
Embodiment 3：
Present embodiments provide the drilling fluid that a kind of oil field extracted water is prepared, including water and in terms of the mass percent for accounting for water
Following each component：0.1~0.3% sulfur elimination, 0.1~0.3% calcium ions and magnesium ions remover, 0.3~0.5% salt resistance corrosion inhibiter,
0.2~0.3% proposes stick, 0.2~0.5% flow pattern regulator, 0.2~0.3% flocculation coating agent, 0.8~1.1% drop dehydration
Agent, 1~2% anti-sloughing agent, 2~5% fluid lubricants, 20~50% Solid weighting agents.
A kind of preparation method of the drilling fluid that oil field extracted water is prepared, it is characterised in that：At least comprise the following steps：
Step one：The pretreatment of oil field extracted water：Comprise the following steps：
Step 1) it is gradually added into oil field extracted water and accounts for the sulfur elimination of oil field extracted water mass percent 0.1~0.3%, stir
Mix uniform, and hydrogen sulfide content is detected with Lead acetate paper in adding procedure, when hydrogen sulfide content is zero, stop addition sulphur removal
Agent；
Step 2) in step 1) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.1~0.3%
Calcium ions and magnesium ions remover calcium ions and magnesium ions remover, stirs；
Step 3) in step 2) add in the oil field extracted water that obtains and account for oil field extracted water mass percent 0.3~0.5%
Salt resistance corrosion inhibiter, stirs.
Step 2：Alkalinity regulator, the pH value of regulation system are added in pretreated oil field extracted water in the step one
It is 8-9；
Step 3：Sequentially add and account for the mass percent 0.2~0.3% of oil field extracted water and carry stick, account for oil field extracted water
The flow pattern regulator of mass percent 0.2~0.5%, account for oil field extracted water mass percent 0.2~0.3% flocculation coating
Agent, accounts for the fluid loss agent of mass percent 0.8~1.1% of oil field extracted water, stirs 1~2 hour, dissolves it；
Step 4：The anti-sloughing agent of mass percent 1%~2% for accounting for oil field extracted water is added, after stirring, is finally added
Enter to account for the fluid lubricant of mass percent 2~5% of oil field extracted water, the mass percent 20~50% for accounting for oil field extracted water is consolidated
Body heavy weight additive, stirs.
Wherein described water is the oil field extracted water of Changqing oilfields；The sulfur elimination is sponge iron, the wide petrochemical industry of North China oil
Co., Ltd provides；The calcium ions and magnesium ions remover is sodium carbonate, and Shandong Yiteng Chemical Co. Ltd. provides；The salt resistance inhibition
Agent model KEJ, the wide petrochemical industry Co., Ltd of North China oil provides；The stick that carries is for adhesive aggregation anionic cellulose PAC- high
HV, apparent viscosity is >=50mPas, and Shandong Yiteng Chemical Co. Ltd. provides；The flow pattern regulator is xanthans, relatively
Molecular mass is 2 × 106~2 × 107；The flocculation coating agent is polyacrylamide, and oil wide petrochemical industry Co., Ltd in North China carries
For；The fluid loss agent includes two kinds：Low adhesive aggregation anionic cellulose PAC-LV and CMS, wherein low adhesive aggregation anion
Cellulose PAC-LV apparent viscosities≤40mPas, Shandong Yiteng Chemical Co. Ltd. provides, CMS, model：ASR-
1, Xi'an Chuan Qin Petroleum Technology Co., Ltd provides；The anti-sloughing agent is sulfonated gilsonite, and model G309-JLS, Xinxiang City's Zhenhua is bored
Well liquid Materials Co., Ltd provides；The fluid lubricant model G303-WYR, Xi'an Chuan Qin Petroleum Technology Co., Ltd carries
For；The Solid weighting agents are blanc fixe.Above-mentioned substance can also be bought from other companies.
Embodiment 4：
Present embodiments provide the drilling fluid that a kind of oil field extracted water is prepared, including water and in terms of the mass percent for accounting for water
Following each component：0.1% sulfur elimination, 0.1% calcium ions and magnesium ions remover, 0.3% salt resistance corrosion inhibiter, 0.2% carries stick,
0.2% flow pattern regulator, 0.2% flocculation coating agent, 0.8% fluid loss agent, 1% anti-sloughing agent, 2% fluid lubricant, 20% consolidates
Body heavy weight additive.
Preparation method is as follows：
The sulfur elimination of mass percent 0.1% for accounting for oil field extracted water is sequentially added in oil field extracted water, accounts for oil field produced
The calcium ions and magnesium ions remover of mass percent 0.1% of water and the salt resistance corrosion inhibiter of mass percent 0.3% for accounting for oil field extracted water, so
Alkalinity regulator NaOH is added afterwards, and the pH value of regulation system is 8-9, sequentially adds the quality percentage for accounting for oil field extracted water
Stick is carried than 0.2%, the flow pattern regulator of mass percent 0.2% of oil field extracted water is accounted for, the quality percentage of oil field extracted water is accounted for
Than 0.2% flocculation coating agent, the fluid loss agent of mass percent 0.8% of oil field extracted water is accounted for, stirred 1~2 hour, make its molten
Solution, finally adds the anti-sloughing agent of mass percent 1% for accounting for oil field extracted water, after stirring, is eventually adding and accounts for oil field produced
The fluid lubricant of mass percent 2% of water, accounts for the Solid weighting agents of mass percent 20% of oil field extracted water, you can bored
Well liquid.
Wherein described water is oil field extracted water；The sulfur elimination is sponge iron；The calcium ions and magnesium ions remover is sodium carbonate；
The salt resistance corrosion inhibiter is salt resistance corrosion inhibiter KEJ；For adhesive aggregation anionic cellulose PAC-HV high, apparent viscosity is the stick that carries
≥50mPa·s；The flow pattern regulator is xanthans, and relative molecular mass is 2 × 106~2 × 107；The flocculation coating agent
It is polyacrylamide；The fluid loss agent includes two kinds：The low adhesive aggregation anion for accounting for oil field extracted water mass percent 0.3% is fine
Dimension element PAC-LV and the CMS for accounting for oil field extracted water mass percent 0.5%, wherein low adhesive aggregation anionic cellulose
PAC-LV apparent viscosities≤40mPas, CMS is CMS ASR-1；The anti-sloughing agent is sulfonated gilsonite
G309-JLS；The fluid lubricant is lubricant G303-WYR；The Solid weighting agents are blanc fixe.
Embodiment 5：
Present embodiments provide the drilling fluid that a kind of oil field extracted water is prepared, including water and in terms of the mass percent for accounting for water
Following each component：0.2% sulfur elimination, 0.2% calcium ions and magnesium ions remover, 0.4% salt resistance corrosion inhibiter, 0.25% carries stick,
0.35% flow pattern regulator, 0.25% flocculation coating agent, 0.95% fluid loss agent, 1.5% anti-sloughing agent, 3.5% fluid lubricant,
35% Solid weighting agents.
Preparation method is as follows：
The sulfur elimination of mass percent 0.2% for accounting for oil field extracted water is sequentially added in oil field extracted water, accounts for oil field produced
The calcium ions and magnesium ions remover of mass percent 0.2% of water and the salt resistance corrosion inhibiter of mass percent 0.4% for accounting for oil field extracted water, so
Alkalinity regulator NaOH is added afterwards, and the pH value of regulation system is 8-9, sequentially adds the quality percentage for accounting for oil field extracted water
Stick is carried than 0.25%, the flow pattern regulator of mass percent 0.35% of oil field extracted water is accounted for, the quality hundred of oil field extracted water is accounted for
Divide the coating agent that flocculated than 0.25%, account for the fluid loss agent of mass percent 0.95% of oil field extracted water, stir 1~2 hour, make it
Dissolving, finally adds the anti-sloughing agent of mass percent 1% for accounting for oil field extracted water, after stirring, is eventually adding and accounts for oil field and adopt
The fluid lubricant of mass percent 3.5% of water outlet, accounts for the Solid weighting agents of mass percent 35% of oil field extracted water, you can
To drilling fluid.
Wherein described water is oil field extracted water；The sulfur elimination is sponge iron；The calcium ions and magnesium ions remover is sodium carbonate；
The salt resistance corrosion inhibiter is KEJ；For adhesive aggregation anionic cellulose PAC-HV high, apparent viscosity is >=50mPa to the stick that carries
s；The flow pattern regulator is xanthans, and relative molecular mass is 2 × 106~2 × 107；The flocculation coating agent is polyacrylamide
Amine；The fluid loss agent includes two kinds：Account for the low adhesive aggregation anionic cellulose PAC-LV of oil field extracted water mass percent 0.35%
With account for the CMS of oil field extracted water mass percent 0.6%, wherein low adhesive aggregation anionic cellulose PAC-LV apparent viscosities
≤ 40mPas, CMS is CMS ASR-1；The anti-sloughing agent is sulfonated gilsonite G309-JLS；The liquid
Lubricant is lubricant G303-WYR；The Solid weighting agents are blanc fixe.
Embodiment 6：
Present embodiments provide the drilling fluid that a kind of oil field extracted water is prepared, including water outlet and in terms of the mass percent of water
Following each component：0.3% sulfur elimination, 0.3% calcium ions and magnesium ions remover, 0.5% salt resistance corrosion inhibiter, 0.3% carries stick,
0.5% flow pattern regulator, 0.3% flocculation coating agent, 1.1% fluid loss agent, 2% anti-sloughing agent, 5% fluid lubricant, 50% consolidates
Body heavy weight additive.
Preparation method is as follows：
The sulfur elimination of mass percent 0.3% for accounting for oil field extracted water is sequentially added in oil field extracted water, accounts for oil field produced
The calcium ions and magnesium ions remover of mass percent 0.3% of water and the salt resistance corrosion inhibiter of mass percent 0.5% for accounting for oil field extracted water, so
Alkalinity regulator NaOH is added afterwards, and the pH value of regulation system is 8-9, sequentially adds the quality percentage for accounting for oil field extracted water
Stick is carried than 0.3%, the flow pattern regulator of mass percent 0.5% of oil field extracted water is accounted for, the quality percentage of oil field extracted water is accounted for
Than 0.3% flocculation coating agent, the fluid loss agent of mass percent 1.1% of oil field extracted water is accounted for, stirred 1~2 hour, make its molten
Solution, finally adds the anti-sloughing agent of mass percent 2% for accounting for oil field extracted water, after stirring, is eventually adding and accounts for oil field produced
The fluid lubricant of mass percent 5% of water, accounts for the Solid weighting agents of mass percent 50% of oil field extracted water, you can bored
Well liquid.
Wherein described water is oil field extracted water；The sulfur elimination is sponge iron, and oil wide petrochemical industry Co., Ltd in North China carries
For；The calcium ions and magnesium ions remover is sodium carbonate；The salt resistance corrosion inhibiter model KEJ；It is described carry stick for adhesive aggregation high it is cloudy from
Subbundle element PAC-HV, apparent viscosity is >=50mPas；The flow pattern regulator be xanthans, relative molecular mass be 2 ×
106~2 × 107；The flocculation coating agent is polyacrylamide；The fluid loss agent includes two kinds：Account for oil field produced water quality hundred
Divide adhesive aggregation anionic cellulose PAC-LV lower than 0.4% and account for the CMS of oil field extracted water mass percent 0.7%, wherein
Low adhesive aggregation anionic cellulose PAC-LV apparent viscosities≤40mPas, CMS is CMS ASR-1；It is described anti-
Agent of collapsing is sulfonated gilsonite G309-JLS；The fluid lubricant is lubricant G303-WYR；The Solid weighting agents are barite
Powder.
Drilling fluid prepared by embodiment 1-6 is applied to Ansai Oilfield king's kiln block and Jing'an oilfield main road ditch block enters
Row field operation, construction results show that this drilling fluid system of the invention adapts to the safely and fast drilling of slim-hole completely, rubs
Resistance coefficient is always held at less than 0.04, and moment of torsion control puts within 10KN.m, on drilling tool puts frictional resistance and be maintained at 1~2 ton, body
Be that lubricity, drop moment of torsion, drop frictional resistance effect are protruded, while preferably solve the problems, such as diamond bit bit balling, system without
Fluorescence drilling cuttings is true, beneficial to integral geologic log, is worth in the further research and extension application of OW Slim Hole Sidetracking Technology block.
The property of drilling fluid that this oil field extracted water of the invention is prepared is as follows：
Drilling fluid respectively prepared by Example 4~6 and labeled as 1#, 2#, 3# sample.
(1) system stability and lubricity
By 1#, 2#, 3# sample, heat rolls 16h at 90 DEG C, and its Parameters variation is as shown in table 1：
Data before and after the heat rolling of the drilling fluid of table 1
Note：AV represents the apparent viscosity of drilling fluid, unit：Centipoise；PV represents the plastic viscosity of drilling fluid, unit：Centipoise；
YP represents the yield value of drilling fluid, unit：Handkerchief；FL represents the filter loss of drilling fluid, unit:Milliliter；PH represents drilling fluid soda acid
Angle value；R represents the sliding block coefficient of friction resistance value of drilling fluid.
As can be seen from Table 1：Drilling fluid rheology and filter loss have been deteriorated, Filtrate Loss Control within 8ml, yield value
All in more than 5Pa, plastic viscosity also meets requirement to YP, and drilling fluid lubricating is functional, and by 1#, 2#, 3# sample at 90 DEG C
Stand that to test its performance within three days substantially unchanged after lower heat rolling 16h.
(2) system inhibition
By 1#, 2#, 3# sample at 90 DEG C heat rolling 16h, compared with clear water+salt is prepared, primary recovery and secondary returning
Yield difference less, can meet oil well horizontal well rejection requirement, and the drilling fluid that oil field extracted water is prepared can reduce
Influences of the KCl to electrical measurement quality, is shown in Table 2.
The system rejection of table 2 is evaluated
| Sample | Primary recovery (%) | Secondary returning yield (%) |
| Clear water | 39.21 | 32.83 |
| Wash boring liquid+5%KCl | 93.92 | 74.92 |
| 1# | 89.22 | 72.48 |
| 2# | 92.80 | 74.30 |
| 3# | 91.08 | 72.32 |
Note：Wash boring liquid refers to that the oil field extracted water in 1# or 2# or 3# drilling fluids is changed to the drilling well prepared by clear water
Liquid ,+5%KCl refers to the KCl for adding wash boring liquid mass percent 5%.
(3) system shale expansion
Because oil field produced water salinity is higher equivalent to brine system, so the drilling fluid prepared should have well
Inhibition.The shale expansion rate of 1#, 2#, 3# sample is further measured all 30% or so by shale expansion instrument, just with reason
It is coincide by analysis, the results are shown in Table 3.
The shale expansion rate experimental data of table 3
| Sample | 1# | 2# | 3# | (clear water+5%KCl+ formulas) |
| Shale expansion rate % | 33.1 | 33.1 | 31.6 | 29.3 |
It is exemplified as above be only to of the invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is that design same or analogous with the present invention is belonged within protection scope of the present invention.
Claims (9)
1. the drilling fluid that a kind of oil field extracted water is prepared, it is characterised in that：Including water and in terms of the mass percent for accounting for water with
Lower each component：0.1~0.3% sulfur elimination, 0.1~0.3% calcium ions and magnesium ions remover, 0.3~0.5% salt resistance corrosion inhibiter, 0.2~
0.3% carries stick, 0.2~0.5% flow pattern regulator, 0.2~0.3% flocculation coating agent, 0.8~1.1% fluid loss agent, 1~
2% anti-sloughing agent, 2~5% fluid lubricants, 20~50% Solid weighting agents.
2. the drilling fluid that oil field extracted water as claimed in claim 1 is prepared, it is characterised in that：The water is oil field extracted water.
3. the drilling fluid that oil field extracted water as claimed in claim 1 is prepared, it is characterised in that：The sulfur elimination is sponge iron.
4. the drilling fluid that oil field extracted water as claimed in claim 1 is prepared, it is characterised in that：The calcium ions and magnesium ions remover is
Sodium carbonate.
5. the drilling fluid that oil field extracted water as claimed in claim 1 is prepared, it is characterised in that：The salt resistance corrosion inhibiter is salt resistance
Corrosion inhibiter KEJ.
6. the drilling fluid that oil field extracted water as claimed in claim 1 is prepared, it is characterised in that：The stick that carries is for adhesive aggregation high is cloudy
Ion fiber element PAC-HV, apparent viscosity is >=50mPas；The flow pattern regulator is xanthans, and relative molecular mass is 2
×106~2 × 107；The flocculation coating agent is polyacrylamide；The fluid loss agent includes two kinds：Account for oil field produced water quality
The low adhesive aggregation anionic cellulose PAC-LV of percentage 0.3% forms sediment with the carboxymethyl for accounting for oil field extracted water mass percent 0.5%
Powder, wherein low adhesive aggregation anionic cellulose PAC-LV apparent viscosities≤40mPas, CMS is CMS ASR-
1；The anti-sloughing agent is sulfonated gilsonite G309-JLS；The fluid lubricant is lubricant G303-WYR；The Solid weighting agents
It is blanc fixe.
7. the preparation method of the drilling fluid that a kind of oil field extracted water is prepared, it is characterised in that：At least comprise the following steps：
Step one：The pretreatment of oil field extracted water；
Step 2：Alkalinity regulator is added in the step one in pretreated oil field extracted water, the pH value of regulation system is 8-
9；
Step 3：Sequentially add and account for the mass percent 0.2~0.3% of oil field extracted water and carry stick, account for the matter of oil field extracted water
The amount flow pattern regulator of percentage 0.2~0.5%, accounts for the flocculation coating agent of mass percent 0.2~0.3% of oil field extracted water, accounts for
The fluid loss agent of mass percent 0.8~1.1% of oil field extracted water, stirs 1~2 hour, dissolves it；
Step 4：The anti-sloughing agent of mass percent 1%~2% for accounting for oil field extracted water is added, after stirring, is eventually adding and is accounted for
The fluid lubricant of mass percent 2~5% of oil field extracted water, the solid of mass percent 20~50% for accounting for oil field extracted water adds
Heavy prescription, stirs.
8. the preparation method of the drilling fluid that oil field extracted water as claimed in claim 7 is prepared, it is characterised in that：The step one
The pretreatment of oil field extracted water is comprised the following steps：
Step 1) it is gradually added into oil field extracted water and accounts for the sulfur elimination of oil field extracted water mass percent 0.1~0.3%, stirring is equal
It is even, and hydrogen sulfide content is detected with Lead acetate paper in adding procedure, when hydrogen sulfide content is zero, stop addition sulfur elimination；
Step 2) in step 1) add in the oil field extracted water that obtains and account for the calcium and magnesium of oil field extracted water mass percent 0.1~0.3%
Ion remaval agent calcium ions and magnesium ions remover, stirs；
Step 3) in step 2) add in the oil field extracted water that obtains and account for the salt resistance of oil field extracted water mass percent 0.3~0.5%
Corrosion inhibiter, stirs.
9. the preparation method of the drilling fluid that oil field extracted water as claimed in claim 7 is prepared, it is characterised in that：The basicity is adjusted
Section agent is NaOH.
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