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

Method for determining tufaceous content of high-gamma sandstone

A technology of gamma sandstone and tuff, applied in measuring devices, nuclear radiation exploration, geophysical measurement, etc., can solve the problems of simple volume model and not fully considering the differences of pore fluid types, etc., and achieve accurate interpretation results , The effect of accurate logging response value

Active Publication Date: 2016-03-23
SHANDONG UNIV OF SCI & TECH
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The volume model established by the commonly used volume model method is simple, and does not fully consider the differences in skeleton parameters at different positions and the differences in pore fluid types, which is not suitable for reservoirs with strong heterogeneity

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
  • Method for determining tufaceous content of high-gamma sandstone
  • Method for determining tufaceous content of high-gamma sandstone
  • Method for determining tufaceous content of high-gamma sandstone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] High-gamma sandstone strata were developed in the Lower Cretaceous Nantun Formation in an oil-bearing block in the Tanan Sag. The high-gamma sandstone in the study area is caused by high tuffaceous content, and the spatial distribution difference of this tuffaceous content can reflect the depositional environment Therefore, the quantitative calculation of tuffaceous content is of great significance for restoring the paleo-sedimentary environment. There are 216 core sample points in the target section of the study area. The thickness of the target layer in this study is 120m, and the logging data has 960 depth data points (logging sampling is one sample point every 0.125m, and there are 8 logging information per meter. depth data points). Previous studies on the tuffaceous content of high gamma sandstone in the research area were mainly through thin-section analysis of core samples, and there was no effective method for the non-coring section. According to the method of ...

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 belongs to the field of oil and gas, and particularly relates to a method for determining the tufaceous content of high-gamma sandstone. A volume model of a rock and volume models of the components of the rock are established, and a tufaceous content determining method based on nested volume models is formed. The method comprises the following steps: standardizing well logging data; establishing a rock volume model, and determining the composition and content of the framework, tuffaceous and mud in the rock; adopting a photoelectric absorption cross section index-natural gamma ray method to identify a high-gamma sandstone reservoir interval based on a well logging curve; selecting a well logging curve for determining the tufaceous content; using a nested volume model to determine the well logging parameter of the rock framework; using a nested volume model to determine the well logging response parameter of tuffaceous; using a nested volume model to determine the well logging response parameter of mud; determining the well logging response parameter of pores according to the type of fluid; and establishing a rock volume model equation, and determining the tuffaceous content. According to the invention, a nested two-layer volume model is adopted, and the explaining result is more accurate.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas, and particularly relates to a method for determining the tuffaceous content of high gamma sandstone, which uses rock analysis test data and geophysical logging data to determine the tuffaceous content in high gamma sandstone. Background technique [0002] "High gamma sandstone reservoir" refers to a sandstone reservoir with a natural gamma value similar to mudstone in clastic oil and gas reservoirs, which belongs to a new type of unconventional oil and gas reservoirs because of its "high Natural gamma ray characteristics are often mistaken for non-reservoirs and neglected in oil and gas exploration and development, but recent oil and gas exploration practices have shown that this type of reservoir has considerable oil and gas productivity, and is an important tool in the exploration and development of clastic rock reservoirs. a new field of . [0003] Studies on high gamma ray sandstone ...

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): G01V5/12
CPCG01V5/12
Inventor 张涛张宪国林承焰于景峰张守秀王彦华冯建国韩承豪臧家君
Owner SHANDONG UNIV OF SCI & TECH
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