Early warning method for monitoring the development of cross flow channel among polymer flooding wells

A polymer and channeling technology, used in forecasting, instrumentation, climate change adaptation, etc., can solve problems such as high cost, long acquisition cycle, and inability to develop trend warnings, achieving strong operability, high forecasting accuracy, and accurate calculation results. reliable results

Active Publication Date: 2017-09-08
CHINA NAT OFFSHORE OIL CORP +1
View PDF4 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing identification methods for channeling channels are mainly divided into production dynamic monitoring, well testing identification, tracer monit...

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
  • Early warning method for monitoring the development of cross flow channel among polymer flooding wells
  • Early warning method for monitoring the development of cross flow channel among polymer flooding wells
  • Early warning method for monitoring the development of cross flow channel among polymer flooding wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0102] Taking the early warning method for channel development between injection and production wells of polymer flooding in Bohai J Oilfield as an example, the well location map of the polymer injection area in J Oilfield (such as figure 2 shown), there are 28 wells in the area, including 8 polymer injection wells and 20 oil production wells. The specific steps are as follows:

[0103] 1) Statistics of the static parameters of the reservoir in the polymer injection area and the production dynamic characteristic parameters after 4 years of polymer injection, calculation of the channeling intensity factor of the oil well, and analysis of the relationship between the channeling intensity factor and the static parameters of the reservoir and various production dynamic characteristic parameters Due to the large number of static parameters and production dynamic characteristic parameters, only part of the analysis results are shown below.

[0104] Table 1 Statistical results of p...

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 an early warning method for monitoring the development of a cross flow channel among polymer flooding wells. The method comprises the following steps: 1) searching a warning source: based on the dynamic and static files and the monitoring files of a target oil field, searching the influencing factors and the specific representation characteristics to develop a cross flow channel in a reservoir; 2) analyzing the warning: using the gray correlation analysis method to determine the main factors influencing the polymer flooding cross flow to form a polymer flooding cross flow early warning index system; 3) identifying the warning degree: using a fuzzy comprehensive evaluation model to create a polymer flooding cross flow early warning evaluation model; and 4) predicting the warning degree: through the prediction to the dynamic indexes in the polymer flooding cross flow early warning index system determined in step 2 consisting of the static indexes and the dynamic indexes, predicting the development trend of the cross flow channel in the coming periods. The early warning method of the invention is capable of providing theoretical guidance for the implementation of the adjustment and optimization of the polymer flooding development stages so as to improve and increase the polymer flooding efficiency and to increase the producing reserves to the largest possible extent.

Description

technical field [0001] The invention relates to an early warning method for monitoring the development of channeling channels between injection and production wells of polymer flooding, and belongs to the technical field of dynamic parameter monitoring in the development process of oil and gas fields. Background technique [0002] Due to the influence of depositional environment, diagenesis and tectonics during the formation process of oil and gas reservoirs, their spatial distribution and internal attributes (such as porosity, permeability and pore structure, etc.) An important factor in water movement and oil and gas recovery. And after years of water injection development, due to the long-term erosion of the injected water, the migration of fine particles and sand production in the formation will form a channel of water flow between the injection well and the production well, which will intensify the heterogeneity of the formation. After the channeling channel is formed,...

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): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02Y02A10/40
Inventor 梁丹康晓东唐恩高王旭东陈文娟
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