Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A high temperature resistant high density synthetic base drilling fluid

A synthetic base and drilling fluid technology, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of high drilling fluid circulation density, unfavorable suspension of drilling cuttings, high formation pressure coefficient, etc., and achieve the reduction of differential pressure stuck Drilling risk, good reservoir protection effect, good filtration and wall building effect

Active Publication Date: 2016-09-28
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing synthetic-based drilling fluid system has poor temperature resistance, and the viscosity and shear force of the system are greatly affected by temperature. When the temperature is slightly higher, the viscosity and shear force of the system will decrease significantly, especially under dynamic shear force and low shear rate. Viscosity is difficult to control, which is not conducive to the suspension of drilling cuttings, and the high equivalent circulation density of drilling fluid is likely to cause lost circulation accidents
In addition, the existing synthetic-based drilling fluid has a low density, and now the world's exploration and development trend is developing towards deep wells and ultra-deep wells. Deep wells and ultra-deep wells have high formation pressure coefficients and high formation temperatures, which have limited the existing synthetic-based drilling fluids. scope of application

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
  • A high temperature resistant high density synthetic base drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Use quaternary ammonium salt products and fatty amide polyvinyl ether products to configure a density of 0.85 g / cm 3 Put 60 liters of synthetic-based drilling fluid in a stirring container, put the stirring container in a 50°C water bath, then add 4 liters of polyoxyethylene ether product mixture, quaternary ammonium salt products and fatty acid amide into the stirring container in sequence 1 liter of auxiliary emulsifier formed by mixing polyvinyl ether products, 4.5 liters of organic soil obtained by modifying long carbon chain alkyl quaternary ammonium salts by montmorillonite clay minerals, stirred for 10 minutes to fully dissolve; Then add 1.5 liters of the mixture of glycerol products in turn, stir for 2 minutes, add 5 liters of wetting modifiers mixed with organic acid amide products and hydantoin products, stir for 2 minutes, add styrene-butadiene Mix 0.5 liters of synthetic product of rubber and polystyrene, stir for 10 minutes to fully dissolve; add 4 liters o...

Embodiment 2

[0037] Use quaternary ammonium salt products and fatty amide polyvinyl ether products to configure a density of 1.2 g / cm 3 Put 90 liters of synthetic-based drilling fluid in a stirring container, put the stirring container in a 50°C water bath, and then add 2 liters of a mixture of polyoxyethylene ether products, quaternary ammonium salt products and fatty amide to the stirring container in sequence 3 liters of co-emulsifiers mixed with polyvinyl ether products, 2 liters of organic soil obtained by modifying long carbon chain alkyl quaternary ammonium salts by montmorillonite clay minerals, stirred for 10 minutes to fully dissolve; Then add 3 liters of the mixture of glycerol products in turn, stir for 2 minutes, add 1 liter of wetting regulator mixed with organic acid amide products and hydantoin products, stir for 2 minutes, add butylbenzene Add 1.5 liters of rubber and polystyrene synthetic product, stir for 10 minutes to fully dissolve; add 1.5 liters of modified asphalt, ...

Embodiment 3

[0039] Use quaternary ammonium salt products and fatty amide polyvinyl ether products to configure a density of 1.2 g / cm 3 Put 70 liters of synthetic base drilling fluid in a stirring container, put the stirring container in a 50°C water bath, and then add 3 liters of a mixture of polyoxyethylene ether products, quaternary ammonium salt products and fatty acid amide into the stirring container in sequence 2 liters of co-emulsifiers mixed with polyvinyl ether products, 3 liters of organic soil obtained by modifying long carbon chain alkyl quaternary ammonium salts by montmorillonite clay minerals, stirred for 10 minutes to fully dissolve; Then add 2 liters of the mixture of glycerol products in turn, stir for 2 minutes, add 3 liters of wetting modifiers mixed with organic acid amide products and hydantoin products, stir for 2 minutes, add styrene-butadiene Mix 1 liter of synthetic product of rubber and polystyrene, stir for 10 minutes to fully dissolve; add 3 liters of modified...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a high temperature-resistance and high density synthetic base drilling fluid , which comprises the following raw materials by volume ratio: 60-90 volume part of base solution , 10-40 volume part of CaC12 aqueous solution with weight concentration of 20-30%, 2-4 volume part of primary emulsion, 1-3 volume part of auxiliary emulsifier, 1-5 volume part of wetting regulator, 0.5-1.5 volume part of tackifier, 1.5-3 volume part of temperature resistant agent, 1.5-4 volume part of filtrate reducer, 2-4.5 volume part of organic soil, 2-3 volume part of alkalinity regulator and 0-260 wt% of weighting agent.

Description

technical field [0001] The invention relates to a fluid used for drilling in the exploration and development of oil and gas reservoirs and the proportion of various components in the fluid. Background technique [0002] Synthetic-based drilling fluids are named after synthetic materials such as esters, ethers, poly-α-olefins, acetals, linear α-olefins, internal olefins, linear alkylbenzenes, and linear paraffins are used in drilling fluids. Among synthetic-based drilling fluids, ester-based drilling fluids were used the earliest, and were used in 10 directional wells in the Statfijord gas field abroad, with good results. This type of ester-based drilling fluid can be directly discharged into the sea after being tested by the environmental protection department. However, ester-based drilling fluids are not anti-pollution, and ether-based drilling fluids have poor stability and poor anti-pollution ability, so α-olefin drilling fluids have been developed. [0003] α-olefin dr...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/14
Inventor 王宝田沈丽邱春阳王海锋李秀灵江智君王雪晨张海青陈二丁王伟秦涛
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com