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

A method for evaluating oil and gas saturation based on rock-electricity structure coefficient

A technology of rock electric structure coefficient and evaluation method, which is applied in the direction of suspension and porous material analysis, measuring devices, scientific instruments, etc., can solve the problems of poor operability and practicability, and achieve easy computer programming calculation and good operability and practicability, and the effect of improving calculation accuracy

Active Publication Date: 2016-11-16
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to solve the problem of poor operability and practicability of the method for evaluating the oil-gas saturation of fractured-vug reservoirs in the prior art, and to provide a method for evaluating oil-gas saturation based on the rock-electrical structure coefficient , improve the accuracy of saturation evaluation and have strong operability

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 oil and gas saturation based on rock-electricity structure coefficient
  • A method for evaluating oil and gas saturation based on rock-electricity structure coefficient
  • A method for evaluating oil and gas saturation based on rock-electricity structure coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Using the logging data of volcanic rock reservoirs from several wells in the Songliao Basin, the present invention is used to calculate the gas saturation, and the calculation result is compared with the gas saturation determined by the core mercury injection data, and the two are very close , the absolute error is within 5% (as shown in Table 1), indicating that the method of the present invention has a good application effect in volcanic rock reservoirs.

[0093]

[0094] Table 1

Embodiment 2

[0096] The Puguang Gas Field is a fractured-vuggy carbonate reservoir with systematic core saturation analysis data. According to the logging data, this method is used to calculate the gas saturation, and the calculation results are compared with the core analysis results (as shown in Table 2 and Figure 4 shown), the absolute error of saturation is within 4%, which proves the correctness of this method and its effectiveness in carbonate reservoir areas.

[0097]

[0098] Table 2

[0099] The method of the present invention aims at the inadaptability of the traditional Archie formula to complex fracture-cavity reservoirs, and proposes a new method for evaluating saturation, which has broad application prospects in the oil and gas exploration and development of increasingly rising volcanic rocks, carbonate rocks and other reservoirs .

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 provides a method for evaluating oil-gas saturation based on rock-electric structure coefficient, belonging to the field of oil-gas saturation evaluation. The method includes the following steps: (1) determining the rock-electric structure coefficient τ; (2) determining the coupling equation between the rock-electric structure coefficient τ and the m index; (3) determining the oil-gas saturation. Utilizing the method of the present invention greatly improves the calculation accuracy of oil-gas saturation in fractured-cavity reservoirs, and the method of the present invention has good operability and practicability, and changes the current method based on experience or complex numerical simulation calculations when modifying Archie's theory. The status of the result.

Description

technical field [0001] The invention belongs to the field of evaluation of oil-gas saturation, and in particular relates to an evaluation method of oil-gas saturation based on rock electric structure coefficient. Background technique [0002] Since Mr. Archie published Archie's formula in 1942, it has become the theoretical basis for oil and gas saturation logging evaluation and has been widely used in practice. It is still the mainstream method for oil and gas saturation evaluation. The traditional Archie's formula is suitable for clean sandstone reservoirs dominated by intergranular pores and relatively large porosity (>15%). Archie's formula has four key parameters (collectively referred to as regional parameters), which are m index (also called cementation index, with a theoretical value of 2), n index (also called saturation index, with a theoretical value of 2), a coefficient (theoretical value of 1) and b coefficient (theoretical value of 1). These regional coeff...

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): G01N15/08
Inventor 李军张军王晓畅胡瑶刘志远路菁于文芹
Owner CHINA PETROLEUM & CHEM 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