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

Method and device for determining gas content of tight reservoirs

A tight reservoir and gas content technology, applied in the field of oil and gas exploration, can solve the problems of large gas content errors in tight reservoirs and the inability to correctly obtain the gas content of tight reservoirs, and achieve the effect of improving calculation accuracy

Active Publication Date: 2018-09-28
PETROCHINA CO LTD
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the gas content of tight reservoirs is often determined by logging data or adsorption-desorption methods. However, there are often many influencing factors in the logging data, resulting in errors in the gas content of tight reservoirs calculated based on logging data. The adsorption-desorption method mostly focuses on the adsorbed gas content, and the existing technology cannot accurately obtain the gas content of tight reservoirs.

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 and device for determining gas content of tight reservoirs
  • Method and device for determining gas content of tight reservoirs
  • Method and device for determining gas content of tight reservoirs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0061] The specific implementation of the embodiment of the present application will be described in detail below with several specific examples.

[0062] An embodiment of a method for determining the gas content of a tight reservoir in the present application is first introduced below. figure 1 It is a flow chart of an embodiment of the...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The embodiment of the invention provides a method and a device for determining gas content of tight reservoirs. The method comprises the following steps: preparing a plunger sample with first specification and a particle sample with second specification from a sample of tight reservoirs; carrying out an adsorption experiment on the particle sample to obtain a reservoir sample gas-adsorption quantity calculation model including temperature, pressure and rock thermal evolution degree parameters; carrying out porosity and rock density determination on the plunger sample to obtain a free gas quantity calculation model including porosity, density, gas saturation, adsorption gas density, stratum correction factor and methane molecule molar mass; and calculating gas content of the tight reservoirby the utilization of the reservoir sample gas-adsorption quantity calculation model and the free gas quantity calculation model. By the technical scheme provided by the embodiment of the invention,gas content of the tight reservoirs can be accurately determined so as to provide data support for accurate evaluation of unconventional natural gas resource quantity.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method and a device for determining the gas content of tight reservoirs. Background technique [0002] In the process of oil and gas exploration, unconventional natural gas is one of the main sources of oil and gas extraction. Unconventional natural gas mainly includes shale gas, coalbed methane and tight sandstone gas, which are important natural gas resources. Accurate measurement and calculation of gas content in tight reservoirs is a key parameter for correct evaluation of unconventional natural gas resources. [0003] In the prior art, the gas content of tight reservoirs is often determined by logging data or adsorption-desorption methods. However, there are often many influencing factors in the logging data, resulting in errors in the gas content of tight reservoirs calculated based on logging data. However, the adsorption-desorption method mostly focuses...

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): G01N7/14G01N15/08G01N9/00
CPCG01N7/14G01N9/00G01N15/088
Inventor 马行陟柳少波赵孟军鲁雪松田华卓勤功孟庆洋范俊佳
Owner PETROCHINA CO LTD
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