Shale oil-gas economical and effective layer section evaluation method

A technology for shale oil and gas and effective layers, which is used in earth-moving drilling, wellbore/well components, etc., and can solve the problem of inability to select economical and effective intervals in shale oil and gas layers.

Active Publication Date: 2015-03-25
PETROCHINA CO LTD
View PDF4 Cites 44 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An embodiment of the present invention provides a method for evaluating economically effective intervals of shale oil and gas to solve the technical problem in the prior art that economically effective intervals cannot be selected in shale oil and gas layers. The method includes:

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
  • Shale oil-gas economical and effective layer section evaluation method
  • Shale oil-gas economical and effective layer section evaluation method
  • Shale oil-gas economical and effective layer section evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0078] Invented evaluation methods for several existing shale oil and gas economically effective intervals:

[0079] 1) When identifying effective fracturing intervals in unconventional shale oil and gas reservoirs, the effective fracturing intervals are determined according to the rock brittleness index of the research interval, that is, according to the mineral composition of the research interval, the quartz, Calcite content multiplied by the sum of the elastic parameters of the corresponding minerals, divided by the sum of quartz, calcite, clay content multiplied by the elastic parameters of the corresponding minerals.

[0080] 2) When studying the identification of effective reservoirs in shale reservoirs, according to the organic carbon content, rock brittleness index and formation pressure coefficient of the research interval, by formulating the discrimination standard and the weight coefficient of each parameter, the organic carbon content, rock brittleness Index, form...

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 shale oil-gas economical and effective layer section evaluation method. The method comprises the steps of determining evaluation parameters of shale of target layer sections according to obtained logging data and core data, wherein the evaluation parameters include the organic carbon content, the porosity, the formation pressure coefficient, the oil-gas accumulative output impact factor and elastic parameters; subtracting a corresponding cut-off value from each evaluation parameter to obtain a difference value of each evaluation parameter; using points with the difference values, larger than 0, of the evaluation parameters as efficient points; adding the thicknesses of logging points which are continuous efficient points in the target layer sections, and using the added result as the single-layer thickness of the continuous efficient points; determining the shale oil-gas accumulated economical yield minimum thickness; using the layer section with the single-layer thickness of the continuous efficient points larger than or equal to the accumulated economical yield minimum thickness in the target layer section as the shale oil-gas economical and effective layer section. According to the shale oil-gas economical and effective layer section evaluation method, the shale oil-gas economical and effective layer section can be accurately and effectively determined, and therefore the shale oil-gas development benefits are improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to an evaluation method for economically effective intervals of shale oil and gas. Background technique [0002] With the development of oil and gas exploration and development from conventional oil and gas reservoirs to unconventional oil and gas reservoirs, shale oil and gas has gradually become an important field of oil and gas exploration and development. In recent years, with the successful commercial development of shale oil and gas, shale oil and gas has gradually become a realistic field of oil and gas exploration. During the exploration and development of shale oil and gas, not all shale The rock oil and gas development intervals can be developed economically and effectively. [0003] At present, the research on shale oil and gas mainly focuses on geological characteristics, genetic mechanism, evaluation of planar core area and fracturing te...

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 侯连华罗霞王京红杨帆杨春杨智张丽君
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
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