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

Dense single-layer sectional treatment method and treatment device for high-pressure under-injection well

A treatment method and treatment device technology, which is applied in the direction of wellbore/well valve devices, chemical instruments and methods, earthwork drilling and production, etc., can solve the problems of short effective period of measures, so as to improve water flooding efficiency, prolong the effect of measures, improve Effect of water injection profile

Active Publication Date: 2020-10-30
西安诚科石油工程技术服务有限公司
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of repeated injection measures for medium and high-pressure under-injection wells in the prior art, and the effective period of the measures is short, the present invention provides a high-pressure under-injection well dense single-layer segmental treatment method and treatment device, which can effectively relieve blockage and prolong solution to the maximum extent. Block time

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
  • Dense single-layer sectional treatment method and treatment device for high-pressure under-injection well
  • Dense single-layer sectional treatment method and treatment device for high-pressure under-injection well
  • Dense single-layer sectional treatment method and treatment device for high-pressure under-injection well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are explanations rather than limitations of the present invention.

[0037] refer to figure 1 , a dense single-layer staged treatment device for water injection wells, comprising a construction string 2, an upper packer 3, a lower packer 4, a constant pressure valve 5 and a ball valve 6.

[0038] The upper packer 3 and the lower packer 4 are arranged at intervals on the construction pipe string 2, the constant pressure valve 5 is arranged on the construction pipe string 2, and is located between the upper packer 3 and the lower packer 4, and the ball valve 6 Set at the lower end of the oil pipe.

[0039] The above-mentioned ball valve 6 includes a ball seat and a closed ball. When the plugging solution is injected into the lowermost end of the oil layer, the ball valve 6 is opened, that is, the closed ball is separated from the ball seat. When the ball v...

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 discloses a dense single-layer sectional treatment method and a treatment device for a high-pressure under-injection well. The treatment device comprises a construction pipe column and two packers arranged at the lower end of the construction pipe column, and a ball valve is arranged at the lower end of the pipe column; in the treatment process, an oil layer is divided into a plurality of sections, and unblocking is conducted section by section from bottom to top through unblocking liquid; firstly, prepad fluid and the unblocking fluid are injected through the ball valve to unblock the oil layer section on the lowermost layer, then an annulus area of a sleeve corresponding to each oil layer section on the upper layer is repeatedly sealed through two packers, and the unblocking fluid is injected through a pressure valve to unblock the oil layer section until unblocking of each oil layer section is completed. According to the method, the unblocking liquid can be prevented from locally flowing and locally treating, it is ensured that the oil layer is sufficiently treated in the longitudinal and transverse directions, blockage can be removed effectively, the measure effect can be prolonged for a long time after treatment by the method, the water injection profile can be effectively improved, and the water flooding efficiency can be improved.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to a segmented treatment method and a treatment device for a dense single layer of a high-pressure under-injection well. Background technique [0002] At present, in oil field production, when water injection wells are injected, the perforation degree of the perforation section of the oil layer reaches 80%, while the vertical permeability of the oil layer section is quite different, and there are cracks, micro-cracks, micro-cracks and narrow high The existence of the permeable layer causes the injection water to be injected along these local high-permeability channels at first, but as the water injection time prolongs, due to the encounter between the injection water and the formation water, scale will be generated, and the contact between the injection water and the water injection pipe will produce corrosion products, and in the oil layer The migratory particles produced by...

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): E21B43/22E21B34/06E21B43/20C09K8/52
CPCE21B43/16E21B34/06E21B43/20C09K8/52
Inventor 李跃刚庞新愉许兵金新喆荆亚件谢丽梁琨
Owner 西安诚科石油工程技术服务有限公司
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