Ultralow-density oil-base drilling fluid and preparation method thereof

An oil-based drilling fluid, ultra-low density technology, applied in the field of oil-based drilling fluid, can solve the problems of poor stability, difficult to adapt to long-term drilling, completion requirements, difficult to prepare, etc., to prevent agglomeration, good emulsion stability, The effect of low temperature and high pressure filter loss

Active Publication Date: 2017-06-13
成都西油华巍科技有限公司 +1
View PDF9 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, ultra-low density oil-based drilling fluid is extremely difficult to prepare and has poor stability, and it is difficul

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultralow-density oil-base drilling fluid and preparation method thereof
  • Ultralow-density oil-base drilling fluid and preparation method thereof
  • Ultralow-density oil-base drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0044] Example one

[0045] An ultra-low-density oil-based drilling fluid, which is made up of the following raw material components according to weight and 100%:

[0046] Base oil 95.00%; Density reducer 0.00%; Suspension stabilizer 0.00%; Emulsifier 2.00%; Tackifier 0.50%; Filtrate reducer 5.00%; Flow modifier 0.00%; Alkalinity regulator 2.00%; Chlorine Calcium sulfide aqueous solution 2.00%; among them, the base oil is mixed with 3# white oil, 5# white oil and natural gas oil, then add flash point enhancer under stirring state, and let stand for 1h; stir at low speed at 30℃, Use a mixing funnel for vacuum suction, slowly add oil-soluble gas phase nano-silica, and add while stirring. The adding process is controlled within 2 hours, including 3# white oil, 5# white oil, natural gas oil, oil-soluble gas phase nano dioxide The dosage ratio of silicon and flash point enhancer is 30:10:60:5:2; among them, the flash point enhancer is menthol. The emulsifier is a long-chain alkyl fatt...

Example Embodiment

[0048] Example two

[0049] An ultra-low-density oil-based drilling fluid, which is made up of the following raw material components according to weight and 100%:

[0050] Base oil 90.00%; Density reducing agent 0.00%; Suspension stabilizer 0.20%; Emulsifier 3.50%; Tackifier 1.00%; Filtrate reducer 4.00%; Flow pattern regulator 0.00%; Alkalinity regulator 3.00%; Chlorine Calcium fluoride aqueous solution 5.00%; among them, the base oil is made by mixing 3# white oil, 5# white oil, and natural gas, and then add the flash point enhancer in a stirring state, and let it stand for 1h; stir at low speed at 30℃, Use a mixing funnel for vacuum suction, slowly add oil-soluble gas phase nano-silica, and add while stirring. The adding process is controlled within 3 hours, among which 3# white oil, 5# white oil, natural gas oil, oil-soluble gas phase nano dioxide The dosage ratio of silicon and flash point enhancer is 40:15:50:10:4; among them, the flash point enhancer is pinene. The emulsif...

Example Embodiment

[0052] Example three

[0053] An ultra-low-density oil-based drilling fluid, which is made up of the following raw material components according to weight and 100%:

[0054] Base oil 90.00%; Density reducer 5.00%; Suspension stabilizer 0.20%; Emulsifier 3.00%; Tackifier 4.00%; Filtrate reducer 3.00%; Flow pattern regulator 0.20%; Alkalinity regulator 2.00%; Chlorine Calcium fluoride aqueous solution 5.00%; among them, the base oil is mixed with 3# white oil, 5# white oil, and natural gas oil, then add the flash point enhancer in the stirring state, and let stand for 0.5h; stir at low speed at 40℃ , Use a mixing funnel for vacuum suction, slowly add oil-soluble gas phase nano-silica, add while stirring, and the adding process is controlled within 2 hours, among which 3# white oil, 5# white oil, natural gas oil, oil-soluble gas phase nano two The dosage ratio of silica and flash point enhancer is 35:20:60:6:3; among them, the flash point enhancer is citral. The density reducing age...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to an ultralow-density oil-base drilling fluid. The invention is characterized in that the ultralow-density oil-base drilling fluid is prepared from the following raw materials: base oil, a density reducer, a suspension stabilizer, an emulsifier, a tackifier, a fluid loss additive, a flow pattern regulator, an alkalinity regulator and a calcium chloride water solution. The base mixed oil is prepared by the following steps: mixing 3# white oil, 5# white oil and natural gas prepared oil, adding a flash point enhancer while stirring, and standing for 0.5-1 hour; and stirring at low speed at the temperature of 30-40 DEG C, and slowly adding oil-soluble nano fumed silica while stirring, wherein the addition process is controlled at 2-3 hours. The ultralow-density oil-base drilling fluid has the advantages of favorable emulsifying stability, favorable rheological properties, high inhibition property for mud shale, high emulsion-breaking voltage, low filter loss, low density (0.75-0.90 g/cm<3>), and high sand carrying and pressure bearing capacities, is beneficial to cleaning the borehole and enhancing the mechanical drilling speed, solves the problem of severe lost circulation in the low-pressure formation and long-section shatter zone formation, and is especially suitable for low-pressure oil gas pools and depletion water-sensitive formations.

Description

technical field [0001] The invention relates to oil-based drilling fluid, in particular to an ultra-low density oil-based drilling fluid and a preparation method thereof. Background technique [0002] For the drilling and development of low-pressure oil and gas layers, the ideal drilling fluid is foam drilling fluid, which has a strong ability to remove and carry cuttings. The application of foam drilling fluid in the drilling process can increase the mechanical penetration rate, reduce the number of stuck pipes, and reduce the drill bit. consumption and required power. However, the conventional water-based foam drilling fluid uses the water phase as the continuous medium, relies on the action of the foaming agent, and mixes with air to reduce the density to form foam or micro-bubbles. Due to the high density of the base fluid, the degree of system density reduction is subject to objective conditions. Especially in some low-pressure deep well areas, the stability of drillin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K8/36
CPCC09K8/36C09K2208/10
Inventor 肖刚徐兴华宋芳
Owner 成都西油华巍科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap