Clay-free high temperature resistance reservoir drilling fluid and preparation method thereof

A high temperature resistance and drilling fluid technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of reservoir drilling fluid system performance deterioration, etc., to achieve good settlement stability, excellent shear dilution performance, good Effect of Reservoir Protection Performance

Active Publication Date: 2017-02-22
CHINA NAT OFFSHORE OIL CORP +1
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the bottom hole temperature is low, the performance of the reservoir drilling fluid can be maintained through the polymer, but at a high temperature exceeding 150°C, conventional polymers will degrade, resultin

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
  • Clay-free high temperature resistance reservoir drilling fluid and preparation method thereof
  • Clay-free high temperature resistance reservoir drilling fluid and preparation method thereof
  • Clay-free high temperature resistance reservoir drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Fully dissolve 660g of potassium formate in 300mL of fresh water, then slowly add 0.66g of sodium hydroxide, 6.0g of potato cross-linked starch (Beijing Zhongke Risheng Technology Co., Ltd.), 1.6 g xanthan gum (Ordos Zhongxuan Biochemical Co., Ltd.), 24.0g calcium carbonate through particle grading (comprising particle size is 1200 mesh, 800 mesh and 400 mesh calcium carbonate powder, and the weight ratio of the three is 1: 1:1) and 184g manganese ore powder (Norway Elkem, micromax), stirring at high speed for 20min.

Embodiment 2

[0046] Fully dissolve 660g of potassium formate in 300mL of fresh water, then slowly add 0.66g of sodium hydroxide, 6.0g of potato cross-linked starch (Beijing Zhongke Risheng Technology Co., Ltd.), 1.6 g xanthan gum (Ordos Zhongxuan Biochemical Co., Ltd.), 24.0g calcium carbonate through particle grading (comprising particle size is 1200 mesh, 800 mesh and 400 mesh calcium carbonate powder, and the weight ratio of the three is 1: 1:1) and 435g manganese ore powder (Norway Elkem, micromax), stirring at high speed for 20min.

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

No PUM Login to view more

Abstract

The invention relates to clay-free high temperature resistance reservoir drilling fluid and a preparation method of the fluid. The reservoir drilling fluid comprises 100 parts by weight of fresh water, 150-220 parts by weight of potassium formate, 0.2-0.25 parts by weight of pH (potential of hydrogen) regulator, 2-3 parts by weight of high temperature resistance fluid loss agent, 0.4-0.8 parts by weight of high temperature resistance shear strength improving agent, 5-8 parts by weight of calcium carbonate, and 0-200 parts by weight of manganese ore powder. The method comprises the steps of dissolving the parts by weight of potassium formate in the fresh water, and adding the parts by weight of pH regulator, high temperature resistance fluid loss agent, high temperature resistance shear strength improving agent, calcium carbonate and manganese ore powder for agitation. The reservoir drilling fluid can meet higher density requirements, has good stability, can keep stable when used at high temperature (such as 150-160 DEG C), has good reservoir protection performance, sedimentation stability and highly-deviated well cutting carrying capacity and can meet drilling requirements of a horizontal well.

Description

technical field [0001] The present application relates to but not limited to a reservoir drilling fluid and a preparation method thereof, specifically to but not limited to a soil-free and high temperature resistant reservoir drilling fluid and a preparation method thereof. Background technique [0002] Reservoir drilling fluid is a working fluid used in reservoir sections that takes into account both the functions of drilling fluid and well completion fluid. Reservoir drilling fluid usually does not contain solid phase, and sometimes acid-soluble solid phase is added to adjust density or prevent leakage, but it should not contain bentonite or barite that is easy to plug the reservoir. At present, the density of domestic reservoir drilling fluid systems without soil phase and barite in the strict sense is generally 1.60g / cm 3 Within, and the temperature resistance is generally within 120 ℃. When faced with higher density requirements, it is often necessary to add barite fo...

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): C09K8/08
CPCC09K8/08
Inventor 苗海龙蒋凯赵顺强徐安国陈缘博田艺张忠亮张兴来
Owner CHINA NAT OFFSHORE OIL CORP
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