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

Low gas-oil-ratio oil reservoir gas logging evaluation method

An evaluation method and technology of gas-oil ratio, applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve problems such as increased exploration costs, low overall coincidence rate, and difficulty in meeting interpretation requirements

Active Publication Date: 2017-02-22
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in view of the particularity and concealment of the reservoir, although this interpretation method is intuitive, the overall coincidence rate is low, which is difficult to meet the interpretation requirements and virtually increases the exploration cost

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
  • Low gas-oil-ratio oil reservoir gas logging evaluation method
  • Low gas-oil-ratio oil reservoir gas logging evaluation method
  • Low gas-oil-ratio oil reservoir gas logging evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] The technical solution of the present invention includes the following steps.

[0072] Step 1 Obtain oil well data: collect on-site gas testing data and oil testing data.

[0073] Step 2 parameter quality control: establish a gas measurement quality control curve template, such as figure 1 shown. figure 1 middle,

[0074] C1 is methane, C2 is ethane, C3 is propane, iC4 is isobutane, and nC4 is normal butane.

[0075] Full hydrocarbon: full hydrocarbon=C1+C2+C3+nC4+iC4+nC5+iC5.

[0076] Heavy hydrocarbons: heavy hydrocarbons=C2+C3+nC4+iC4+nC5+iC5.

[0077] Humidity ratio: Wh=(C2+C3+nC4+iC4+nC5+iC5) / (C1+C2+C3+nC4+iC4+nC5+iC5).

[0078] Balance ratio: Bh=(C1+C2) / (C3+nC4+iC4+nC5+iC5).

[0079] Quality control curve value: R Q =(C1+C2+C3+C4+C5) / (C1+2C2+3C3+4C4+5C5).

[0080] Import the gas logging data into the quality control curve template, and the quality control curve template will automatically calculate the quality control ratio range based on the gas logging...

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 the technical field of oil development oil reservoir engineering, in particular to a low gas-oil-ratio oil reservoir gas logging evaluation method. By adoption of the low gas-oil-ratio oil reservoir gas logging evaluation method, the problems that the interpretation coincidence rate is low, understanding of oil and gas reservoirs is not clear, and oil-water relation analysis is unknown during exploration and development are solved, and the exploration effect is improved. The low gas-oil-ratio oil reservoir gas logging evaluation method comprises the following steps that firstly, oil well data are obtained; secondly, parameter quality is controlled, specifically, a gas logging quality control curve template is established, gas logging data are input into the quality control curve template, and the gas logging data with the quality control ratio being within the range of 0.8-2.0 are selected to serve as analysis data meeting quality requirements; thirdly, parameters are selected, specifically, a relation between the gas logging data and an oil-water-gas layer is discovered through a grey correlation degree analysis method; and fourthly, the parameter research and oil reservoir gas logging evaluation method is established. A two-dimensional linear crossplot-gas logging interpretation chart is established, and different interpretation conclusion ranges are marked out.

Description

technical field [0001] The invention relates to the technical field of oil development reservoir engineering, in particular to a gas measurement and evaluation method for reservoirs with low gas-oil ratio. Background technique [0002] The Ordos Basin of Changqing Oilfield is a typical "three-low" oil and gas field with low permeability, low pressure and low abundance. Due to the lack of mud logging technical support in the early stage, the understanding of oil and gas reservoirs and the analysis of oil-water relationship are unclear, which affects the exploration effect. In particular, the Jurassic Yan'an Formation is a low gas-oil ratio reservoir, which brings great difficulties to interpretation and evaluation. [0003] At present, there are two commonly used technical means: one is to analyze the parameters of well logging curves. Because the relationship between well logging curves and oil-water layers in the three-low area is not well responded, the interpretation coin...

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): E21B49/00
CPCE21B49/00
Inventor 陈志伟刘应忠陈光权骆福贵李忠亮吴彩雄王春辉杜鹏
Owner BC P INC CHINA NAT PETROLEUM 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