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

Downhole formation porosity determination method

A technology of formation pores and formations, applied in the field of oil and gas exploration, can solve problems such as increasing the difficulty of field application, and achieve the effect of improving the utilization rate and improving the accuracy

Active Publication Date: 2016-03-02
YANGTZE UNIVERSITY
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a method for determining the porosity of an underground formation, which is used to solve the problem that the porosity determination method in the prior art needs to perform lithology correction and compaction correction on the calculated porosity value, which increases the difficulty of field application

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
  • Downhole formation porosity determination method
  • Downhole formation porosity determination method
  • Downhole formation porosity determination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] The invention provides a method for determining the porosity of downhole formations. Aiming at the problems of many logging collection series and post-correction required for porosity logging detection, the detection characteristics of two instruments, element capture spectrum logging and array acoustic logging, are used in the well. A conv...

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 downhole formation porosity determination method. The method comprises the steps that the rock framework longitudinal wave slowness at the downhole set depth is determined according to the formation mineral volume content; the formation longitudinal wave slowness and formation transverse wave slowness at the downhole set depth are extracted according to array acoustic wave logging data; the formation porosity at the downhole set depth is determined according to the rock framework longitudinal wave slowness, the formation longitudinal wave slowness and the formation transverse wave slowness at the downhole set depth. According to the downhole formation porosity determination method, the formation porosity value is determined by adopting both the formation longitudinal slowness and the formation transverse wave slowness, the downhhole formation porosity can be precisely obtained, the obtained formation porosity value does not need to be corrected, the utilization rate of the array acoustic wave logging data is increased, and the accuracy of the formation porosity value is improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method for determining the porosity of downhole formations. Background technique [0002] Porosity is the ratio of formation void volume to total rock volume. It is an important parameter to describe the physical properties of formation. Accurately obtaining formation porosity is a basic task for underground mineral exploration. The porosity of underground formations can be detected by using seismic and logging techniques. Logging technology mainly uses various instruments to detect physical signals in drilled wells, and then detects underground geological conditions and wellbore engineering conditions. [0003] In the prior art, a commonly used porosity determination method is: use indoor core compressional wave velocity-porosity, density-porosity experiments to establish empirical formulas, and then use logging instruments to measure physical signals such as ...

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): E21B49/00
CPCE21B49/00
Inventor 唐军
Owner YANGTZE UNIVERSITY
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