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

A Method for Evaluating Periodic Water Injection Effect

A technology for evaluating period and water injection wells, which is applied in earthwork drilling, wellbore/well components, production fluids, etc. It can solve the problems of strong model subjectivity, large errors, and poor guidance of optimization results, etc., and achieve real-time control and adjustment , real-time comparison, and the effect of quantitative comparison

Active Publication Date: 2020-09-01
CHINA NAT OFFSHORE OIL CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of strong model subjectivity, large error, qualitative, and poor guidance of optimization results existing in the numerical simulation method and the conventional parameter comparison evaluation method

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 Method for Evaluating Periodic Water Injection Effect
  • A Method for Evaluating Periodic Water Injection Effect
  • A Method for Evaluating Periodic Water Injection Effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Evaluation of Periodic Water Injection Effect in Iraq AH Oilfield

[0043] Iraq AH oilfield belongs to carbonate reservoirs, and the vertical heterogeneity of the reservoir section is serious. Therefore, the periodic water injection technology is used to control the sudden channeling of injected water and increase the oil displacement efficiency of injected water. The oilfield has two periodic injection well groups A8-3H well group and A10-2H well group, such as figure 1 As shown, the periodic water injection A8-3H well group includes 3 wells: the water injection well A8-3H, the oil production well A7-3H and the oil production well A9-3H; the periodic water injection A10-2H well group includes 3 wells: the water injection well A10-2H , production well A11-2H and production well A9-3H. There is an observation well between well A10-2H and well A11-2H.

[0044] According to the requirements of step 1), there is a downhole pressure gauge in well A7-3H, and an o...

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 new method for evaluating the cyclic water injection effect based on production monitoring data. The method comprises the following steps that step (1) pressure is monitored, and the production data is collected; step (2) the pressure fluctuation mode is established; step (3) the cyclic water injection effect is evaluated based on the pressure fluctuation curve type; step (4) the cyclic water injection effect is evaluated based on pressure fluctuation amplitude; step (5) the cyclic water injection effect is evaluated based on injection-production ratio periodic changing amplitude; and step (6) periodic water injection parameters are optimized in real time based on the pressure fluctuation process, the value of the monitoring data is fully discovered, the changing form, the changing range and the changing process of the monitoring data are introduced into the evaluating method, so that the purposes of showing and quantification of the cyclic water injection effect as well as real-time performance, accuracy and quantification of the optimization process is achieved.

Description

technical field [0001] The invention relates to a new method for evaluating the periodic water injection effect based on production monitoring data. The method can quickly and accurately evaluate the implementation effect of the periodic water injection, and can perform optimization and adjustment in real time, and is applied to the fields of oil reservoir water injection development and the like. Background technique [0002] Oilfield water injection development, also known as secondary oil recovery, is the use of special injection wells to inject water into the oil reservoir, so as to maintain or restore the formation pressure in the oil layer, so as to achieve the purpose of improving the development speed and recovery rate of the oil reservoir. In the process of water injection development, a large amount of injected water will be produced along the high-permeability formation, while the crude oil in the low-permeability formation cannot be affected. Therefore, in order t...

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): E21B43/20
CPCE21B43/20
Inventor 范乐宾尹彦君张海锋姜康史长林姚为英冯毅胡云亭
Owner CHINA NAT OFFSHORE OIL 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