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Method for evaluating content of intergranular pressure dissolution origin quartz cement

A technology of quartz cementation and evaluation method, applied in measurement devices, material analysis using wave/particle radiation, instruments, etc., can solve problems such as the inability to meet the needs of target evaluation of favorable areas of low permeability-tight sandstone reservoirs

Active Publication Date: 2020-04-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on the research requirements and existing problems of numerical simulation of compaction, the existing technology cannot meet the current target evaluation requirements of favorable areas in low-permeability-tight sandstone reservoirs

Method used

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  • Method for evaluating content of intergranular pressure dissolution origin quartz cement
  • Method for evaluating content of intergranular pressure dissolution origin quartz cement
  • Method for evaluating content of intergranular pressure dissolution origin quartz cement

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Experimental program
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Embodiment 1

[0081] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, an evaluation method for the content of intergranular pressure-solution-origin quartz cement, collects image analysis test data such as casting thin sections, cathodoluminescence thin sections, and scanning electron microscopes in the overall study area; classifies sandstone samples into casting thin sections, scanning electron Part A sandstone sample of electron microscope and cathodoluminescence thin section and part B sandstone sample including casting thin section and scanning electron microscope; the overall quartz cement content is quantitatively counted on the casting thin section image data, and the quantitative statistics are obtained on the cathodoluminescence thin section image data The content of pressure-solution-origin quartz cement; ba...

Embodiment 2

[0103] Embodiment 2: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, an evaluation method for the content of quartz cement of intergranular pressure-solution origin includes the following steps: collecting and sorting out cast thin sections, cathode luminescence thin sections and scanning electron microscope image data of sandstone in the research target layer; sandstone samples are classified into parts A and Part B, part A sandstone samples include casting thin section, scanning electron microscope and cathode luminescence thin section image data, part B sandstone samples include casting thin section and scanning electron microscope image data; quantitative statistics of total quartz on casting thin section and cathode luminescence thin section image Cement content Tqc; Quantitatively count the pressure-solution-ori...

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Abstract

The invention discloses a method for evaluating the content of intergranular pressure dissolution origin quartz cement. The method belongs to the technical field of sandstone diagenetic numerical simulation method research. The method comprises the steps of: collecting, arranging and researching image data of a casting body thin sheet, a cathode light-emitting thin sheet and a scanning electron microscope of the sandstone at the target layer; classifying a sandstone sample into a part A and a part B, wherein the part A sandstone sample comprises the image data of the casting body thin sheet, the scanning electron microscope and the cathode light-emitting thin sheet, and the part B sandstone sample comprises the image data of the casting body thin sheet and the scanning electron microscope;quantitatively counting the total content Tqc of the quartz cement on the images of the casting body thin sheet and the cathode light-emitting thin sheet; quantitatively counting the content PSqc ofthe pressure dissolution origin quartz cement on the cathode light-emitting sheet image; evaluating a proportionality coefficient of the pressure dissolution origin quartz cement based on the total quartz cement content and the pressure dissolution origin quartz cement content of part of the sandstone sample A; and evaluating the content EPSqc of the pressure dissolution origin quartz cement of all the sandstone samples according to the total content of the quartz cement on the casting thin sheets of part B sandstone samples.

Description

technical field [0001] The invention proposes an evaluation method for the content of intergranular pressure-dissolved quartz cement, which belongs to the technical field of sandstone diagenesis numerical simulation method research. Background technique [0002] Reservoir quality research began in the 1880s, mainly relying on empirical relationships or a generation of geochemical models; after that, dynamic models of diagenesis were gradually developed, such as compaction, quartz cementation, montmorillonite illitization , plagioclase albite feldsparization, fibrous illite formation and other models. Currently, the kinetic models of plagioclase albitization and fibrous illite formation have not been integrated into reservoir quality prediction models, which mainly include compaction, quartz cementation, and fibrous illite formation Kinetic model. [0003] Tight sandstone reservoirs are the target of oil and gas exploration in recent years. Diagenetic numerical simulation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2251G01N21/84
CPCG01N23/2251G01N21/84
Inventor 王文广林承焰林建力张宪国董春梅任丽华黄导武段冬平黄鑫
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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