CN108084977A - High oil-water ratio oil base drilling fluid system - Google Patents
High oil-water ratio oil base drilling fluid system Download PDFInfo
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- CN108084977A CN108084977A CN201711380575.0A CN201711380575A CN108084977A CN 108084977 A CN108084977 A CN 108084977A CN 201711380575 A CN201711380575 A CN 201711380575A CN 108084977 A CN108084977 A CN 108084977A
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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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
- C09K8/36—Water-in-oil emulsions
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention discloses a kind of high oil-water ratio oil base drilling fluid systems, the water phase of base oil and 5~10 parts by volume including 90~95 parts by volume, and the primary emulsion of 0.8~1.8 weight percent of base oil and total combined aqueous phase gauge, the auxiliary emulsifier of 1.0~2.0 weight percent, the wetting agent of 1.2~1.5 weight percent, the organoclay of 2.0~3.0 weight percent, the calcium oxide of 3.0~4.0 weight percent, the emulsification plugging material of 3.5~4.5 weight percent, 1~1.5 weight percent pitch class plugging material, the calcium chloride brine of 2.0~2.5 weight percent.The present invention has good emulsion stability and relatively low rheological characteristic, with preferably washing away borehole wall ability, it is cleaned beneficial to wellbore, ECD values are low, effectively reduce the risk of leakage, rheological characteristic caused by the high stratum of drilling moisture content can be overcome to go up, saving drilling fluid cost is not only improved, and be conducive to the maintenance of live property of drilling fluid.
Description
Technical field
The invention belongs to the drilling engineering fields of the resources such as petroleum gas, and in particular to a kind of high oil-water ratio oil base drilling well
Liquid system.
Background technology
At present, being continuously increased with THE WESTERN SOUTH CHINA SEA Beibu Bay drilling well difficulty, oil base drilling fluid is rapidly developed,
As the important means for drilling highly difficult well and reservoir protection.However, existing oil base drilling fluid still occurs in use
Pull out of hole the problems such as difficult, borehole well instability and cementing quality difference, and greater loss is brought to well operations are drilled.It is in addition, existing
Oil base drilling fluid contamination resistance is poor, and formation fluid is higher to the pollution level of drilling fluid system, affects to a certain extent
The stability of drilling fluid is, it is necessary to frequently more renew slurry, cost is higher.
Above-mentioned discussion content purpose is may be each with the present invention for being described below and/or advocating to reader's introduction
A relevant technology of aspect, it is believed that the discussion content contributes to as reader with background's information, to be conducive to more fully understand this
The various aspects of invention, it is therefore to be understood that being to read these discussions with this angle, without being to recognize that the prior art.
The content of the invention
A kind of high oil-water ratio oil base drilling fluid system is provided it is an object of the invention to avoid deficiency of the prior art,
Rheological characteristic caused by solve the high stratum of drilling moisture content goes up.
The purpose of the present invention is achieved through the following technical solutions：
A kind of high oil-water ratio oil base drilling fluid system is provided, the drilling fluid system includes the base oil of 90~95 parts by volume
Primary emulsion with 0.8~1.8 weight percent of the water phase and base oil and total combined aqueous phase gauge of 5~10 parts by volume,
The auxiliary emulsifiers of 1.0~2.0 weight percent, the wetting agent of 1.2~1.5 weight percent, 2.0~3.0 weight percent
Organoclay, the calcium oxide of 3.0~4.0 weight percent, the emulsification plugging material of 3.5~4.5 weight percent, 1~1.5 weight
Measure percent pitch class plugging material, the calcium chloride brine of 2.0~2.5 weight percent.
As a further improvement, the auxiliary emulsifier is answered for organic acid amide class surfactant and cationic emulsifier
With composition, the weight ratio of organic acid amide class surfactant and cationic emulsifier is 1：1~1： 2.5.
As a further improvement, the chemical formula of the organic acid amide class surfactant is CaHbO4, wherein a is 15
~19, b is 21~26.
As a further improvement, the chemical formula of the cationic emulsifier is CeHfO16, wherein e is that 62~69, f is
120~130.
As a further improvement, the plugging material includes the emulsification plugging material of 3.5~4.5 weight percent, 1%
~1.5 weight percent pitch class plugging materials.
As a further improvement, suitable weighting material is further included.
High oil-water ratio oil base drilling fluid system provided by the invention, the drilling fluid system include the base of 90~95 parts by volume
Plinth oil and the water phase of 5~10 parts by volume and the main emulsification of 0.8~1.8 weight percent of base oil and total combined aqueous phase gauge
Agent, the auxiliary emulsifier of 1.0~2.0 weight percent, the wetting agent of 1.2~1.5 weight percent, 2.0~3.0 weight percent
Organoclay, the calcium oxide of 3.0~4.0 weight percent, the emulsification plugging material of 3.5~4.5 weight percent, 1~1.5
Weight percent pitch class plugging material, the calcium chloride brine of 2.0~2.5 weight percent.High oil-water ratio provided by the invention
Oil base drilling fluid system has the advantages that：
(1) formation fluid is low to the pollution level of drilling fluid system, maintains the stability of drilling fluid to a certain extent, no
With frequently more renewing slurry；
(2) drilling fluid has relatively low shear force and first egress value, and filter loss is low, and activity is moderate, and emulsion-breaking voltage is high, drilling fluid
Convenient for safeguarding；
(3) saving drilling fluid cost is not only improved, adds economic benefit, and is conducive to the dimension of live property of drilling fluid
Shield, it is easy to operation, it can be in field of oil drilling extensive use.
Specific embodiment
In order to which those skilled in the art is made to more fully understand technical scheme, below with specific embodiment pair
The present invention is described in further detail, it is necessary to illustrate, in the case where there is no conflict, embodiments herein and embodiment
In feature can be mutually combined.
A kind of high oil-water ratio oil base drilling fluid system provided in an embodiment of the present invention includes the base oil of 90~95 parts by volume
Primary emulsion with 0.8~1.8 weight percent of the water phase and base oil and water phase total volume meter of 5~10 parts by volume,
The auxiliary emulsifiers of 1.0~2.0 weight percent, the wetting agent of 1.2~1.5 weight percent, 2.0~3.0 weight percent
Organoclay, the calcium oxide of 3.0~4.0 weight percent, the emulsification plugging material of 3.5~4.5 weight percent, 1~1.5 weight
Measure percent pitch class plugging material, the calcium chloride brine of 2.0~2.5 weight percent.The auxiliary emulsifier is organic acid acyl
The weight of amine surfactants and cationic emulsifier compounding composition, organic acid amide class surfactant and cationic emulsifier
Amount is than being 1：1~1： 2.5.The chemical formula of the organic acid amide class surfactant is CaHbO4, wherein a is 15~19, b
For 21~26.The chemical formula of the cationic emulsifier is CeHfO16, wherein e is that 62~69, f is 120~130.
The high oil-water ratio oil base drilling fluid system of the present invention has good emulsion stability and relatively low rheological characteristic, has
Borehole wall ability preferably is washed away, is cleaned beneficial to wellbore, equivalent circulating density (ECD) value is low, effectively reduces the risk of leakage, can be with
Mud ball and denseness increase are played when overcoming the problems, such as to carry out drillng operation in the easy aquation stratum of brokenness, overcomes original emulsification
Agent emulsifying power is low, the unstable situation of system.
The present invention combines the service condition of THE WESTERN SOUTH CHINA SEA early period basin oil base drilling fluid, right by largely choosing experiment
Than the emulsifying effectiveness of compound emulsifying agent.
Investigate emulsifier it is compound after oil-water ratio be 90~95:Emulsion-breaking voltage in 5~10 emulsion preferably goes out main breast
Agent and auxiliary emulsifier, are shown in Table 1.As can be seen that primary emulsion and auxiliary emulsifier compounding ratio 1:When 1.2, emulsion breakdown voltage
Up to 1200V, high-strength composite film can be formed on oil-water interfaces, and emulsion can be allowed to keep good stability.
1 compound emulsifying agent evaluation effect of table
Under conditions of high oil-water ratio, the viscous of drilling fluid can be improved by using organoclay and other materials dosage and cut.By
The specific experiment data of table 2 can be seen that full oil base drilling fluid system with relatively low rheological characteristic, can improve discharge capacity, improve
Borehole wall flushing effect.
The high oil-water ratio oil base drilling fluid performance measurement result of 2 different densities of table
The configuration process of drilling fluid of the present invention indoors is as follows：
(1) under 10000 revs/min of mixing speeds, in 360~390ml base oils successively by concentration add in primary emulsion,
Auxiliary emulsifier, wetting agent are sheared 10~15 minutes；
(2) under 10000 revs/min of mixing speeds, (about 20ml) calcium chloride of certain volume is added according to oil-water ratio
Saline solution is sheared 30~45 minutes；
(3) under 10000 revs/min of mixing speeds, calcium oxide, organoclay are added in by concentration successively, shears 30~45 points
Clock；
(4) under 10000 revs/min of mixing speeds, emulsification sealing agent, pitch class plugging material are added in by concentration successively,
Shearing 30~45 minutes；
(5) under 10000 revs/min of mixing speeds, appropriate weighting material (barite, iron ore are added in by required density
Powder), it stirs 30~45 minutes, completes indoor configuration.
The configuration process when drilling fluid of the present invention is applied at the scene is as follows：
(1) volume of 1 mud pit is measured, adds in the base oil of certain volume accurate measurement；
(2) equipment such as slush pump, shear pump are opened, primary emulsion, auxiliary emulsifier and wetting agent is added in from charging hopper, adds
Material after the completion of continue shearing 1~4 it is small when；
(3) according to oil-water ratio, saline solution is added in by charging hopper, continue shearing 1~2 it is small when；
(4) calcium oxide, organoclay and emulsification sealing agent, pitch class plugging material, when shearing 1~2 is small are added in；
(5) by density need, add in appropriate weighting material (barite, Iron Ore Powder), continue stirring 1~2 it is small when, complete
Configure operation.
Many details are elaborated in above description to facilitate a thorough understanding of the present invention, still, the present invention can be with
Implemented using other different from other modes described here, it is thus impossible to be interpreted as limiting the scope of the invention.
In short, although the present invention lists above-mentioned preferred embodiment, although it should be noted that those skilled in the art
Member can carry out various change and remodeling, unless such variation and remodeling deviate from the scope of the present invention, otherwise should all wrap
It includes within the scope of the present invention.
Claims (6)
1. a kind of high oil-water ratio oil base drilling fluid system, it is characterised in that：Base oil and 5~10 bodies including 90~95 parts by volume
The water phase of product part and primary emulsion, 1.0~2.0 weights of 0.8~1.8 weight percent of base oil and total combined aqueous phase gauge
Measure the auxiliary emulsifier of percentage, the wetting agent of 1.2~1.5 weight percent, the organoclay of 2.0~3.0 weight percent, 3.0
The chlorination of the calcium oxide of~4.0 weight percent, the plugging material of 4.5~6.0 weight percent, 2.0~2.5 weight percent
Calcium salt water.
2. high oil-water ratio oil base drilling fluid system according to claim 1, it is characterised in that：The auxiliary emulsifier is organic
Sour amide surfactants and cationic emulsifier compounding composition, organic acid amide class surfactant and cationic emulsifier
Weight ratio be 1：1~1：2.5.
3. high oil-water ratio oil base drilling fluid system according to claim 2, it is characterised in that：The organic acid amide class table
The chemical formula of face activating agent is CaHbO4, wherein a is 15~19, b is 21~26.
4. high oil-water ratio oil base drilling fluid system according to claim 3, it is characterised in that：The cationic emulsifier
Chemical formula is CeHfO16, wherein e is that 62~69, f is 120~130.
5. high oil-water ratio oil base drilling fluid system according to any one of claim 1 to 4, it is characterised in that：The envelope
Stifled material includes emulsification plugging material, 1~1.5 weight percent pitch class plugging material of 3.5~4.5 weight percent.
6. high oil-water ratio oil base drilling fluid system according to any one of claim 1 to 4, it is characterised in that：It further includes
Suitable weighting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711380575.0A CN108084977A (en) | 2017-12-20 | 2017-12-20 | High oil-water ratio oil base drilling fluid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711380575.0A CN108084977A (en) | 2017-12-20 | 2017-12-20 | High oil-water ratio oil base drilling fluid system |
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| Publication Number | Publication Date |
|---|---|
| CN108084977A true CN108084977A (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711380575.0A Pending CN108084977A (en) | 2017-12-20 | 2017-12-20 | High oil-water ratio oil base drilling fluid system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045210A (en) * | 2013-01-18 | 2013-04-17 | 中国石油化工股份有限公司 | High-efficiency plugging oil-base drilling fluid and preparation method thereof |
| CN104610945A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工集团公司 | Environmentally-friendly strong sealing oil-based drilling fluid |
| CN107163921A (en) * | 2017-05-02 | 2017-09-15 | 中国石油天然气股份有限公司 | A kind of oil base drilling fluid and preparation method thereof |
-
2017
- 2017-12-20 CN CN201711380575.0A patent/CN108084977A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045210A (en) * | 2013-01-18 | 2013-04-17 | 中国石油化工股份有限公司 | High-efficiency plugging oil-base drilling fluid and preparation method thereof |
| CN104610945A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工集团公司 | Environmentally-friendly strong sealing oil-based drilling fluid |
| CN107163921A (en) * | 2017-05-02 | 2017-09-15 | 中国石油天然气股份有限公司 | A kind of oil base drilling fluid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| J.I.迪斯塔肖: "《油田化学剂新发展》", 31 January 1988, 石油工业出版社 * |
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Application publication date: 20180529 |