Plugging, regulating and washing process of oil well

A technology of oil wells and processes, which is applied in wellbore/well components, production fluids, earthwork drilling and production, etc. It can solve the problems of inability to improve oil production efficiency, retention, and inability to be displaced, and achieve the improvement of potential tapping effect and reservoir The effect of increased mobilization and strengthened governance measures

Active Publication Date: 2013-12-04
PETROCHINA CO LTD +1
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the treatment measures for high water-cut oil wells mainly adopt composite water shutoff technology, which uses composite water shutoff agent to seal the high water-cut layer of the oil well and reduce the liquid output capacity of the layer, but this technology is only

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
  • Plugging, regulating and washing process of oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing:

[0011] The oil well plugging, adjusting and washing process technology is to inject a surfactant solution slug and a reverse profile control polymer solution slug before the composite plugging agent slug, and through the plugging, adjusting and washing three technologies on the oil well A process method of comprehensive application, which expands the swept volume of water injected at the well end, reduces the comprehensive water cut at the oil well end, improves the oil washing efficiency, fully excavates the remaining oil in the formation, and improves the recovery factor.

[0012] It specifically includes the following processes: 1. Pre-slug injection: The agents used in this slug are surfactant solution and reverse profile control polymer. The remaining oil is then injected into the reverse profile control polymer. Since the viscosity of the reverse profile control polym...

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 a plugging, adjusting and washing process of an oil well. The plugging, regulating and washing process is used for taking enhanced oil recovery measures on a high-water-cut-oil-producing well in oil recovery production and comprises the following procedures that surface active agent first enters a high-permeability part for cleaning remaining oil in the high-permeability part, and then a reverse profile control polymer is injected into the high-permeability part, since the viscosity of the reverse profile control polymer is greater than that of the surface active agent, the reverse profile control polymer drives the surface active agent to migrate to the deep part of a reservoir, and after the oil well resumes production, the reverse profile control polymer migrates along a backflow passage of the surface active agent under the displacement action of injected water to form plugging; then complex water plugging agent is injected for carrying out high-strength plugging on the high-permeability part, the liquid outlet capability of an interval is reduced, and after that cement is used for sealing a near-wellbore area for preventing injected medicament from returning to be poured into a shaft; finally a polymer solution is used for replacing a slug to play an effect on washing the shaft. The displacement efficiency is improved while the high-permeability part in the interval is effectively plugged, remaining oil in the reservoir is fully excavated, the oil ingress potential of a single well is improved, and the recovery rate is improved.

Description

technical field [0001] The invention relates to an oil well plugging, adjustment and washing process used when implementing measures to increase recovery rate of high water-cut oil wells in oil production. Background technique [0002] At present, the treatment measures for high water-cut oil wells mainly adopt composite water shutoff technology, which uses composite water shutoff agent to seal the high water-cut layer of the oil well and reduce the liquid output capacity of the layer, but this technology is only for simple plugging , although it has good plugging performance for high aquifers, it will form a "dead oil zone", and the remaining oil in the layer will still stay in the pores and cannot be displaced in the subsequent production process, so the oil recovery efficiency cannot be improved . Contents of the invention [0003] In order to improve the recovery rate of high water-cut oil wells, the invention provides an oil well plugging, adjustment and washing pro...

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): E21B43/22
Inventor 刘洪军张柏曹鼎洪许万利李波付卫东高立峰孟庆胜黄书生韩文超刘隽炜王德晴郭丽丽
Owner PETROCHINA CO LTD
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