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A porosity calculating method based on coal rock industrial component analysis

An industrial composition, porosity technique with applications in permeability/surface area analysis, suspension and porous material analysis, measuring devices, etc.

Inactive Publication Date: 2017-03-15
CHINA UNIV OF MINING & TECH (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no method to obtain porosity from coal industry composition data. Here, a method for quickly calculating coal and rock pores is established. Using industrial composition to obtain porosity parameters is convenient and fast, and can improve the performance of petrophysical forward modeling. precision

Method used

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  • A porosity calculating method based on coal rock industrial component analysis
  • A porosity calculating method based on coal rock industrial component analysis
  • A porosity calculating method based on coal rock industrial component analysis

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Example 1: Calculation of coal rock porosity in Zhaozhuang Mine, Jincheng, Shanxi, carried out on July 15, 2016.

[0066]The input parameter required to calculate the porosity of coal rocks using formula (6) is bulk density (ρ 体 ), average mineral density (ρ 矿 ), the average density of organic matter (ρ 有机质 ), air-dried basis ash (Aad), air-dried basis volatile matter (Vad), air-dried basis fixed carbon (FCad), pyrite sulfur content (S p,d ). Collect coal quality analysis reports in the study area, where ρ 体 , Aad, Vad, FCad, S p,d It can be obtained directly from the coal quality analysis report. By consulting the existing literature, it is known that the density of organic matter is 1.37g / cc. Through X-ray diffraction, the coal rock mineral content in the work area is as follows: clay minerals account for 8.59%, quartz accounts for 11.4%, feldspar accounts for 1.7%, and pyrite accounts for 1%. According to this result, the minerals are calculated by the formula ...

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Abstract

The invention relates to a porosity calculating method. Porosity calculation in principle requires coal quality analysis data of a researched zone, with the data including coal industrial components (ash, volatile components, fixed carbon and a sulfur content) and a coal rock apparent density. Main calculation steps include acquiring the bulk density of a coal sample, acquiring industrial component data (ash, volatile components, fixed carbon and a sulfur content) of the coal sample, and performing porosity calculation through combination of known organic matter density and mineral density data and through a calculation formula provided in the method. Through the method, porosity of coal rock can be calculated simply in a large scale, and the method is beneficial to research of earthquake rock physics.

Description

[0001] Field [0002] The utility invention relates to a porosity calculation method based on the industrial component analysis of coal and rock. [0003] technical background [0004] Petrophysics bridges the gap between reservoir properties and seismic properties of porous media. In petrophysical analysis, establishing an accurate model based on reservoir properties can help improve the accuracy of forward modeling, thereby better simulating the seismic properties of the medium and improving the accuracy of inversion interpretation. Porosity, lithology, and fluid type in reservoir properties are the basis for establishing petrophysical models, and porosity is an important parameter. In previous studies, the porosity was usually measured by mercury intrusion porosimetry and Bohr method, but the experimental process of these two methods is complicated. In the measurement process of mercury intrusion method, because the coal rock is extremely soft, it is easy to damage the inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 邹冠贵曾葫汤小明
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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