CN105567185B - A kind of crude oil for debilitating oil-gas reservoir oil field is the oil base drilling fluid of continuous phase - Google Patents
A kind of crude oil for debilitating oil-gas reservoir oil field is the oil base drilling fluid of continuous phase Download PDFInfo
- Publication number
- CN105567185B CN105567185B CN201511024345.1A CN201511024345A CN105567185B CN 105567185 B CN105567185 B CN 105567185B CN 201511024345 A CN201511024345 A CN 201511024345A CN 105567185 B CN105567185 B CN 105567185B
- Authority
- CN
- China
- Prior art keywords
- oil
- drilling fluid
- base drilling
- crude oil
- oil base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The present invention provides the oil base drilling fluids that a kind of crude oil for debilitating oil-gas reservoir oil field is continuous phase, which includes crude oil, salting liquid and inorganic agent, wherein the volume ratio of the crude oil and salting liquid is 70 95:5‑30；The inorganic agent includes emulsifier, wetting agent, organoclay, fluid loss additive and pH adjusting agent, in terms of 100mL crude oil+salting liquid：The dosage of emulsifier is 1.5 2.5g, the dosage of wetting agent is 0.5 0.8g, the dosage of organoclay is 1 3g, the dosage of fluid loss additive is 3 6g, the dosage of pH adjusting agent is 1 3g；The crude oil is the crude oil of offset well extraction.Present invention oil base drilling fluid oily based on crude oil not only has borehole wall stability identical with conventional oil base drilling fluid, inhibition and greasy property, and compared with conventional oil base drilling fluid, with continuous phase that is more cheap, being easy to get, the drilling cost that great number continuous phase is brought can be significantly reduced.
Description
Technical field
The invention belongs to petroleum exploration fields, and in particular to a kind of crude oil for debilitating oil-gas reservoir oil field is continuous phase
Oil base drilling fluid.
Background technology
Enter coda gradually with the second stage of domestic conventional oil gas reservoir exploitation, work is being taped the latent power just to the transformation of old block
Orderly carrying out.Well pattern thickening is the key measure that high water-cut stage old block improves recovery ratio, but since old block passes through
Long-term exploitation has been crossed, has resulted in strata pressure failure, Partial Block pressure difference between oily group caused by heavy wool group voidage-injection imbalance
It is different big, formed cover pressure systems, leakage accident frequently occurs in drilling process, and great challenge is brought to drilling well, with normal
The oil base drilling fluid of rule can be by larger economic pressures.
Invention content
In order to overcome the problems referred above, it is continuous the object of the present invention is to provide a kind of crude oil for debilitating oil-gas reservoir oil field
The oil base drilling fluid of phase.
It is a further object of the present invention to provide the preparation methods of above-mentioned oil base drilling fluid.
It is a further object of the present invention to provide application of the above-mentioned oil base drilling fluid in debilitating Reservoir Development.
In order to achieve the above objectives, the present invention provides the oil that a kind of crude oil for debilitating oil-gas reservoir oil field is continuous phase
Base drilling fluid, the drilling fluid include：Crude oil, salting liquid and inorganic agent, wherein the volume ratio of the crude oil and salting liquid is 70-
95:5-30；The inorganic agent includes emulsifier, wetting agent, organoclay, fluid loss additive and pH adjusting agent, with 100mL crude oil+salt
Solution meter：The dosage of emulsifier is 1.5-2.5g, the dosage of wetting agent is 0.5-0.8g, the dosage of organoclay is 1-3g, drop filter
The dosage for losing agent is 3-6g, the dosage of pH adjusting agent is 1-3g；The crude oil is the crude oil of offset well extraction, and the character of crude oil is：
Density 0.78-0.98g/cm3, wax content 2.0%-9.9%, viscosity 4.07-9.15mPa.s, -28 to -4 DEG C of condensation point, sulfur content
0.20%-0.88%.
Since the biggest problem encountered in debilitating oil-gas reservoir oil field development is that reservoir pressure coefficient is relatively low, strata pressure loses
Empty problem.For this purpose, the present invention is used as oil base drilling fluid by the crude oil (crude oil for meeting certain condition) for producing offset well
Base oil prepares drilling fluid, which has the following advantages：Crude oil and reservoir compatibility higher first, have better reservoir
Protecting effect；Secondly, the use of crude oil can reduce the cost of drilling fluid；Again, leakage caused by pressure deficit will not be dirty
Contaminate reservoir.
Crude oil provided by the invention be continuous phase oil base drilling fluid compared with conventional oil base drilling fluid, not only have with
The identical borehole wall stability of conventional oil base drilling fluid, inhibition and greasy property, and compared with conventional oil base drilling fluid, have
Continuous phase that is more cheap, being easy to get, can significantly reduce the drilling cost that great number continuous phase is brought.
In the oil base drilling fluid that above-mentioned crude oil is continuous phase, it is preferable that the inorganic agent further includes heavy weight additive, heavy weight additive
Dosage be that the density of drilling fluid is made to meet 1.0-1.5g/cm3Subject to.It is further preferred that the heavy weight additive include lime stone,
The combination of one or more of barite, micro- manganese and micro mist barite.
In the oil base drilling fluid that above-mentioned crude oil is continuous phase, it is preferable that the salting liquid includes sodium chloride solution, chlorination
The combination of one or more of calcium solution, sodium formate solution, potassium formate solutions and Klorvess Liquid.It is further preferred that institute
The mass concentration for stating salting liquid is 20-40%.
Above-mentioned crude oil be continuous phase oil base drilling fluid in, it is preferable that the emulsifier include oleic acid diethanol phthalein amine,
The combination of one or more of glycerine boric acid oleate and bis-fatty acid ethoxycarbonyl hydroxyethyl methyl sulfate methyl ammonium.
In the oil base drilling fluid that above-mentioned crude oil is continuous phase, it is preferable that the bis-fatty acid ethoxycarbonyl hydroxyethyl methyl
Sulfate methyl ammonium, general formula are：[(RCOOHCH2CH2)2NCH3CH2CH2OH]+CH3SO4, wherein R is the alkyl of C16-C18, preferably
For C18Alkyl.In drilling fluid system provided by the invention, above-mentioned several emulsifiers can make drilling fluid 70:30-95:5
Within the temperature range of oil-water ratio range and 50 DEG C -120 DEG C, good emulsion stability and high-temperature stability are kept for a long time.
In the oil base drilling fluid that above-mentioned crude oil is continuous phase, it is preferable that the wetting agent includes alkylphenol-polyethenoxy
The combination of one or more of ether, octyl phenol, sulfosuccinic acid di-isooctyl sodium.
In the oil base drilling fluid that above-mentioned crude oil is continuous phase, it is preferable that the organoclay is oleophylic clay.The oleophylic
Clay is to be dispersed through, purified by montmorillonite, is modified, with hexadecyltrimethylammonium chloride replace cheating engaging layer between metal from
Son is most obtained through dehydration, drying, grinding afterwards.
In the oil base drilling fluid that above-mentioned crude oil is continuous phase, it is preferable that the fluid loss additive includes humic acid acetamide, brown
The combination of one or more of coal resin, bitumen and oxidized asphalt.
In the oil base drilling fluid that above-mentioned crude oil is continuous phase, it is preferable that the pH adjusting agent is calcium oxide.
The present invention also provides the preparation methods of above-mentioned oil base drilling fluid, and this approach includes the following steps：Under stirring condition,
Emulsifier, organoclay, salting liquid, fluid loss additive, pH adjusting agent and wetting agent are sequentially added into crude oil, obtain oil base drilling well
Liquid.
Crude oil provided by the invention is that the oil base drilling fluid of continuous phase successfully solves drilling well in debilitating Reservoir Development
Liquid misses the problem of Frequent Accidents.It not only reduces to leakage formation damage (even if being productive formation if leakage main component
Crude oil, therefore, the influence to ground environment are smaller), and economic pressures caused by greatly reducing leakage accident (are bored after leakage
Oil phase in well liquid can also together produce in follow-up exploitation with fresh oil).Meanwhile drilling fluid uses the oil of productive formation
Phase effectively reduces the preparation cost of oil base drilling fluid.
Crude oil provided by the present invention is that the oil base drilling fluid of continuous phase has the beneficial effect that：
1, the base oil that the solution of the present invention uses comes scene, cheap, and mating inorganic agent dosage is few, Neng Gouyou
Effect reduces oil base drilling fluid cost, and overall cost is low, and economic benefit protrudes.
2, the compatibility of scheme provided by the invention, drilling fluid and reservoir is strong, the injury caused by reservoir after leaking
Smaller.
3, scheme provided by the invention, low for reservoir pressure coefficient, heavy weight additive usage amount is small, can mitigate solid phase significantly
Grain injury.
Specific implementation mode
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but should not be understood as to the present invention can practical range restriction.
Same crude oil is used in embodiment 1-3, compared the physical of crude oil and petrifaction diesel in Tables 1 and 2 respectively
The rheological characteristic of matter and the two：
1 crude oil of table is compared with diesel oil physical property
2 crude oil of table is compared with diesel oil rheological property
Embodiment 1
The oil base drilling fluid that a kind of crude oil is continuous phase is present embodiments provided, the component for preparing the drilling fluid includes：
Crude oil, 270mL；
Salting liquid, 20% CaCl2Solution 30mL；
Emulsifier, oleic acid diethanol phthalein amine 6g；
Organoclay, 6g；
Fluid loss additive, oxidized asphalt 12g；
PH adjusting agent, calcium oxide 6g；
Wetting agent, alkyl phenol polyoxyethylene ether 1.5g；
Heavy weight additive, lime stone；
The step of preparing the drilling fluid include：
Oleic acid diethanol phthalein amine, high-speed stirred (11000r/min) 20min are added in crude oil；Then CaCl is added2It is molten
Liquid high-speed stirred (11000r/min) 20min；Then organoclay is added, stirs 20min；Then oxidized asphalt is added, stirs
10min；Then calcium oxide is added, stirs 10min；Then alkyl phenol polyoxyethylene ether is added, and heavy weight additive is added and is exacerbated to
1.2g/cm3, the obtained oil base drilling fluids of stirring 20min.
Obtained oil base drilling fluid is tested for the property (test result is shown in Table 1)：
Oil base drilling fluid obtained is heated to 50 DEG C and measures its rheological characteristic；
Drilling fluid after above-mentioned be completed is poured into ageing can, at 120 DEG C aging 16h, aging finish postcooling
To room temperature, ageing can is opened, the crude oil base oil base drilling fluid after aging is poured into height and is stirred in cup, stirs 20min, and again at 50 DEG C
Secondary its rheological characteristic of survey.
Embodiment 2
The oil base drilling fluid that a kind of crude oil is continuous phase is present embodiments provided, the component for preparing the drilling fluid includes：
Crude oil, 270mL；
Salting liquid, 20% CaCl2Solution 30mL；
Emulsifier, glycerine boric acid oleate 4.5g；
Organoclay, 4.5g；
Fluid loss additive, bitumen 15g；
PH adjusting agent, calcium oxide 9g；
Wetting agent, octyl phenol 1.5g；
Heavy weight additive, lime stone.
The step of preparing the drilling fluid include：
Glycerine boric acid oleate, high-speed stirred (11000r/min) 20min are added in crude oil；Then CaCl is added2It is molten
Liquid high-speed stirred (11000r/min) 20min；Then organoclay is added, stirs 20min；Then bitumen is added, stirs
10min；Then calcium oxide is added, stirs 10min；Then octyl phenol is added, lime stone is used in combination to be exacerbated to 1.2g/cm3, stir
It mixes 20min and oil base drilling fluid is made.
Obtained oil base drilling fluid is tested for the property (test result is shown in Table 1)：
Oil base drilling fluid obtained is heated to 50 DEG C and measures its rheological characteristic；
Drilling fluid after above-mentioned be completed is poured into ageing can, at 120 DEG C aging 16h, aging finish postcooling
To room temperature, ageing can is opened, the crude oil base oil base drilling fluid after aging is poured into height and is stirred in cup, stirs 20min, and again at 50 DEG C
Secondary its rheological characteristic of survey.
Embodiment 3
The oil base drilling fluid that a kind of crude oil is continuous phase is present embodiments provided, the component for preparing the drilling fluid includes：
Crude oil, 270mL；
Salting liquid, 20% CaCl2Solution 30mL；
Emulsifier, bis-fatty acid ethoxycarbonyl hydroxyethyl methyl sulfate methyl ammonium 6g ([(C18H37COOHCH2CH2)2NCH3CH2CH2OH]+CH3SO4)；
Organoclay, 3g；
Fluid loss additive, walchowite 12g；
PH adjusting agent, calcium oxide 6g；
Wetting agent, sulfosuccinic acid di-isooctyl sodium 1.5g；
Heavy weight additive, lime stone；
The step of preparing the drilling fluid include：
Bis-fatty acid ethoxycarbonyl hydroxyethyl methyl sulfate methyl ammonium, high-speed stirred (11000r/min) are added in crude oil
20min；Then CaCl is added2Solution high-speed stirred (11000r/min) 20min；Then organoclay is added, stirs 20min；So
After be added walchowite, stir 10min；Then calcium oxide is added, stirs 10min；Then sulfosuccinic acid di-isooctyl is added
Sodium, and heavy weight additive is added and is exacerbated to 1.2g/cm3, the obtained oil base drilling fluids of stirring 20min.
Obtained oil base drilling fluid is tested for the property (test result is shown in Table 3)：
Oil base drilling fluid obtained is heated to 50 DEG C and measures its rheological characteristic；
Drilling fluid after above-mentioned be completed is poured into ageing can, at 120 DEG C aging 16h, aging finish postcooling
To room temperature, ageing can is opened, the crude oil base oil base drilling fluid after aging is poured into height and is stirred in cup, stirs 20min, and again at 50 DEG C
Secondary its rheological characteristic of survey.
The performance test of 3 oil base drilling fluid of table
Note：The condition of aging is aging 16h at 120 DEG C.
Test case 1
The reservoir damage that this test case provides oil base drilling fluid is tested, and test result is shown in Table 4.
Live oil base drilling fluid：Oil-water ratio is 80:20；Density is 1.2g/cm3；
By percentage to the quality, which further includes：+ 4% oxygen of 2%+2% organoclay of+2% auxiliary emulsifier of primary emulsion
Change+2%+1% wetting agent of calcium oxide of pitch+heavy weight additive (lime stone).
Potassium sulphonated polymer mud：Density is 2.0g/cm3；Every 100 parts of water includes following components (by percentage to the quality)：
2% bentonite+0.5%NaOH+5%SMP+7%KCl+2% anti-sloughing agents+3%SMC+1% lubricants+heavy weight additive (barite).
The reservoir damage experiment test of 4 oil base drilling fluid of table
The test result of table 4 shows during permeability resume figure measuring, the filter loss of original oil-based drilling fluid
It is larger, but since the base fluid of crude oil drilling fluid and the compatibility of rock core are more preferable, so its permeability resume figure is more than 90%, it is high
In other two kinds of drilling fluids, there is good reservoir protection effect.
Claims (13)
1. a kind of crude oil for debilitating oil-gas reservoir oil field is the oil base drilling fluid of continuous phase, which includes：Crude oil, salt
Solution and inorganic agent, wherein
The volume ratio of the crude oil and salting liquid is 70-95:5-30；
The inorganic agent includes emulsifier, wetting agent, organoclay, fluid loss additive and pH adjusting agent, with 100mL crude oil+salting liquid
Meter：The dosage of emulsifier is 1.5-2.5g, the dosage of wetting agent is 0.5-0.8g, the dosage of organoclay is 1-3g, fluid loss additive
Dosage be 3-6g, the dosage of pH adjusting agent is 1-3g；
The crude oil is the crude oil of offset well extraction, and the character of crude oil is：Density 0.78-0.98g/cm3, wax content 2.0%-
9.9%, viscosity 4.07-9.15mPa.s, -28 to -4 DEG C of condensation point, sulfur content 0.20%-0.88%；
The emulsifier includes one kind in glycerine boric acid oleate and bis-fatty acid ethoxycarbonyl hydroxyethyl methyl sulfate methyl ammonium
Or two kinds of combination.
2. oil base drilling fluid according to claim 1, wherein the inorganic agent further includes heavy weight additive, the dosage of heavy weight additive
To make the density of drilling fluid meet 1.0-1.5g/cm3Subject to.
3. oil base drilling fluid according to claim 2, wherein the heavy weight additive includes lime stone, barite, micro- manganese and micro-
The combination of one or more of powder barite.
4. oil base drilling fluid according to claim 1, wherein the salting liquid include sodium chloride solution, calcium chloride solution,
The combination of one or more of sodium formate solution, potassium formate solutions and Klorvess Liquid.
5. oil base drilling fluid according to claim 4, wherein the mass concentration of the salting liquid is 20-40%.
6. oil base drilling fluid according to claim 1, wherein the bis-fatty acid ethoxycarbonyl hydroxyethyl methyl Methylsulfate
Ammonium, general formula are：[(RCOOCH2CH2)2NCH3CH2CH2OH]+CH3SO4, wherein R is the alkyl of C16-C18.
7. oil base drilling fluid according to claim 1, wherein the bis-fatty acid ethoxycarbonyl hydroxyethyl methyl Methylsulfate
Ammonium, general formula are：[(RCOOCH2CH2)2NCH3CH2CH2OH]+CH3SO4, wherein R is the alkyl of C18.
8. oil base drilling fluid according to claim 1, wherein the wetting agent includes alkyl phenol polyoxyethylene ether, octane
The combination of one or more of base phenol and sulfosuccinic acid di-isooctyl sodium.
9. oil base drilling fluid according to claim 1, wherein the organoclay is oleophylic clay.
10. oil base drilling fluid according to claim 9, wherein the oleophylic clay be dispersed through, purified by montmorillonite,
It is modified, with hexadecyltrimethylammonium chloride replace cheating engaging layer between metal ion, most afterwards through dehydration, drying, grind
It arrives.
11. oil base drilling fluid according to claim 1, wherein the fluid loss additive includes humic acid acetamide, lignite tree
The combination of one or more of fat, bitumen and oxidized asphalt.
12. oil base drilling fluid according to claim 1, wherein the pH adjusting agent is calcium oxide.
13. a kind of crude oil for debilitating oil-gas reservoir oil field prepared described in claim 1-12 any one is continuous phase
The preparation method of oil base drilling fluid, this approach includes the following steps：
Under stirring condition, emulsifier, salting liquid, organoclay, fluid loss additive, pH adjusting agent and wetting are sequentially added into crude oil
Agent obtains oil base drilling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024345.1A CN105567185B (en) | 2015-12-30 | 2015-12-30 | A kind of crude oil for debilitating oil-gas reservoir oil field is the oil base drilling fluid of continuous phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024345.1A CN105567185B (en) | 2015-12-30 | 2015-12-30 | A kind of crude oil for debilitating oil-gas reservoir oil field is the oil base drilling fluid of continuous phase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105567185A CN105567185A (en) | 2016-05-11 |
| CN105567185B true CN105567185B (en) | 2018-09-04 |
Family
ID=55877840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511024345.1A Active CN105567185B (en) | 2015-12-30 | 2015-12-30 | A kind of crude oil for debilitating oil-gas reservoir oil field is the oil base drilling fluid of continuous phase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105567185B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111484835B (en) * | 2020-04-23 | 2023-02-03 | 新疆塔里木油田建设工程有限责任公司 | Water-soluble oil-based drilling fluid lubricant and preparation method thereof |
| CN114806518A (en) * | 2021-01-21 | 2022-07-29 | 中国石油天然气股份有限公司 | Oil-based drilling fluid composition and oil-based drilling fluid |
| CN114560883B (en) * | 2022-03-07 | 2024-01-26 | 西安石油大学 | Boron-containing spiro-type crude oil treating agent and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497999A (en) * | 2014-12-31 | 2015-04-08 | 中国石油天然气集团公司 | Plant oil-based drilling fluid and preparation method thereof |
| CN104531107A (en) * | 2014-12-31 | 2015-04-22 | 中国石油天然气集团公司 | Emulsifying agent for oil base drilling fluid and preparation method thereof |
| CN104610936A (en) * | 2014-12-31 | 2015-05-13 | 中国石油天然气集团公司 | Filtrate loss reducer for full oil-based drilling fluid, and preparation method of filtrate loss reducer |
-
2015
- 2015-12-30 CN CN201511024345.1A patent/CN105567185B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497999A (en) * | 2014-12-31 | 2015-04-08 | 中国石油天然气集团公司 | Plant oil-based drilling fluid and preparation method thereof |
| CN104531107A (en) * | 2014-12-31 | 2015-04-22 | 中国石油天然气集团公司 | Emulsifying agent for oil base drilling fluid and preparation method thereof |
| CN104610936A (en) * | 2014-12-31 | 2015-05-13 | 中国石油天然气集团公司 | Filtrate loss reducer for full oil-based drilling fluid, and preparation method of filtrate loss reducer |
Non-Patent Citations (1)
| Title |
|---|
| 植物油全油基钻井液研究;张洁，等;《钻井液与完井液》;20141130;第31卷(第6期);24-27 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105567185A (en) | 2016-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107365574B (en) | Viscosity-reducing oil displacement agent for common heavy oil reservoir and preparation method thereof | |
| CN102952531B (en) | Surfactant for displacing oil of offshore oilfield and preparation method thereof | |
| CN104830298B (en) | A kind of water-base emulsion composite blockage relieving agent | |
| CN104861944B (en) | A kind of deep water constant current becomes oil base drilling fluid | |
| CN103320104B (en) | A kind of water-in-oil-type biofuel base drilling fluid and preparation method thereof | |
| CN105567185B (en) | A kind of crude oil for debilitating oil-gas reservoir oil field is the oil base drilling fluid of continuous phase | |
| CN104927805A (en) | High-density water-based drilling fluid applicable to continental deposit sensitive shale formation | |
| CN104263339A (en) | Oil-based drilling fluid shaft completion cleaning fluid and preparation method thereof | |
| CN105295872A (en) | Drilling fluid suitable for compact sandstone reservoir | |
| CN109943307A (en) | The method that foam solution blocked during heavy crude heat extraction for profile control and preparation method thereof and foam system and profile control block | |
| NO20160420A1 (en) | Volatile Surfactant Treatment for Subterranean Formations | |
| CN103710010A (en) | High-temperature resistant oil base drilling fluid system | |
| CN107474814A (en) | A kind of emulsion-type oil base mud cleans liquid and preparation method thereof | |
| CN103351853B (en) | A kind of High Temperature Gas well Drilling Fluids for Horizontal Wells and comprise the well finishing liquid of this drilling fluid | |
| CN107325797B (en) | Low oil-water ratio oil-based drilling fluid and preparation method thereof | |
| CN105189694A (en) | Additives for oil-based drilling fluids | |
| CN115029112A (en) | Composite base drilling fluid and preparation method and application thereof | |
| CN106147728A (en) | A kind of shale horizontal well water-base drilling fluid and preparation method thereof | |
| CN109266319B (en) | Full-oil-based drilling fluid and preparation method and application thereof | |
| CN105602541A (en) | Low-permeability reservoir decompression and augmented injection system | |
| CN111748328B (en) | Ultrahigh-temperature long-acting stable oil-based well completion fluid and preparation method thereof | |
| CN107163921A (en) | A kind of oil base drilling fluid and preparation method thereof | |
| CN112063375A (en) | High-temperature-resistant high-density oil-based well completion fluid and preparation method thereof | |
| Qing et al. | Study and application of gelled foam for in-depth water shutoff in a fractured oil reservoir | |
| CN104277805A (en) | Filter cake cleaning fluid and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |