Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

High water cut later oil reservoir flow field grading evaluation method

An evaluation method and flow field technology, applied in earthwork drilling, data processing application, measurement, etc., can solve the problems of result uncertainty, error, large range of human factors in grading levels, etc.

Pending Publication Date: 2019-10-08
PETROCHINA CO LTD +1
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some scholars have comprehensively analyzed the static and dynamic factors affecting the reservoir flow field, and used logical analysis to screen out the final water flux as the only indicator for flow field evaluation. However, in the process of characterization Human factors are relatively large. Most researchers artificially formulate the number of classification categories and upper and lower limits based on experience and laws. There are generally certain errors and the results are uncertain.
Therefore, this characterization method cannot objectively evaluate the flow field, and is not universally applicable to the characterization of the flow field in the late stage of high water cut. Therefore, it is urgent to find a set of non-subjective factor-controlled hierarchical evaluation methods to systematically characterize the oilfield flow field in the late stage of high water cut. system

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
  • High water cut later oil reservoir flow field grading evaluation method
  • High water cut later oil reservoir flow field grading evaluation method
  • High water cut later oil reservoir flow field grading evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] A method for grading and evaluating the flow field of a high water-cut reservoir in the late stage, comprising the following steps:

[0044] S1. Comprehensively analyze the static and dynamic factors affecting the reservoir flow field, use the logic analysis method to screen out the appropriate flow field evaluation index, and finally determine the surface flux as the only index for reservoir flow field evaluation, such as figure 1 ;

[0045] S2. Carry out preliminary cluster analysis on the surface flux field data exported by ECLIPSE. The original surface flux field data are as follows: Figure 5 As shown in , the surface fluxes are clustered using fuzzy C-means clustering analysis to obtain the cluster center an...

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 high water cut later oil reservoir flow field grading evaluation method and belongs to the field of numerical reservoir simulation application and oil-gas field developmentflow field reconstruction. The high water cut later oil reservoir grading evaluation method comprises the steps that surface flux serves as a unique index for representing a flow field, firstly, clustering is carried out on the surface flux through a fuzzy c-means algorithm, a clustering center and a clustering number are obtained, a large parabolic membership function is used for carrying out normalization processing on surface flux data, a processing result is defined as flow field strength, the flow field strength is graded through the fuzzy c-means algorithm, and a complete flow field evaporation system is established. According to the high water cut later oil reservoir flow field grading evaluation method, a method support is provided for predicting remaining oil distribution, findinga preferential channel, quantitatively evaluating the flow field strength and directing digging potential remaining oil of a high water-cut stage oil field.

Description

technical field [0001] The invention relates to a method for graded evaluation of reservoir flow field in the late stage of high water cut, which belongs to the field of reservoir numerical simulation application and oil and gas field development flow field reconstruction. It performs quantitative graded evaluation on the dynamic parameters of reservoir flow field reconstruction, and establishes a method A grading evaluation method based on surface flux non-subjective factor control. Background technique [0002] Reservoir is a flowing field, and the flow of reservoir fluid can be characterized by flow field. The characterization and evaluation of the flow field has gradually become the focus of research in recent years. There is a lack of related research in foreign countries, and domestic research mainly focuses on the selection and evaluation methods of flow field characterization indicators. The selected indicators play a decisive role in the evolution of the flow field....

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 Applications(China)
IPC IPC(8): E21B47/00G06Q50/02
CPCE21B47/00G06Q50/02
Inventor 陶自强姜瑞忠张海涛刘海富张春光万永刚李佩敬成洪文
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
Eureka Blog
Learn More
PatSnap group products