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A Characterization Method Applicable to Continental Shale Micro/Nano Scale Reservoir Space

A micro-nano, mud shale technology, applied in the direction of permeability/surface area analysis, analysis by nuclear magnetic resonance, material analysis by radiation, etc. It can solve the problem that the types of storage space are not comparable and are not suitable for continental mud sheets Rock exploration evaluation and other issues

Active Publication Date: 2020-08-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since foreign countries are mainly marine mud shale, its storage space type is not comparable to that of continental mud shale in my country, and the theory of organic pores is not suitable for the exploration and evaluation of continental mud shale storage in my country

Method used

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  • A Characterization Method Applicable to Continental Shale Micro/Nano Scale Reservoir Space
  • A Characterization Method Applicable to Continental Shale Micro/Nano Scale Reservoir Space
  • A Characterization Method Applicable to Continental Shale Micro/Nano Scale Reservoir Space

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1. A characterization method suitable for micro-nano-scale reservoir space of continental shale, characterized in that the method includes the following steps:

[0031] Step 1: Select several parallel core samples at a certain depth of the continental mud shale reservoir to be characterized, and use NMR to perform T2 spectrum analysis and check analysis on the core samples respectively; analyze and calculate the defined porosity of the core samples; The calibration analysis mentioned above is high-pressure mercury injection analysis or / and nuclear magnetic resonance porosity analysis;

[0032]Step: 2: Use the micro-nano CT analyzer to perform three-dimensional high-precision scanning of the core sample, initially identify the pores through the artificially defined gray threshold, and use step 1 to obtain the defined porosity and perform multiple thresholds on the porosity of the identified pores Optimal correction to determine the accurate gray threshold;

[0...

Embodiment 2

[0040] Example 2. A characterization method suitable for micro-nano-scale reservoir space of continental shale, characterized in that the method includes the following steps:

[0041] Step 1: Select several parallel core samples at a certain depth of the continental mud shale reservoir to be characterized, and use NMR to perform T2 spectrum analysis and check analysis on the core samples respectively; analyze and calculate the defined porosity of the core samples; The calibration analysis mentioned above is high-pressure mercury injection analysis or / and nuclear porosity analysis;

[0042] Step: 2: Use the micro-nano CT analyzer to perform three-dimensional high-precision scanning of the core sample, initially identify the pores through the artificially defined gray threshold, and use step 1 to obtain the defined porosity and perform multiple thresholds on the porosity of the identified pores Optimal correction to determine the accurate gray threshold;

[0043] Step 3: Use m...

Embodiment 3

[0055] Example 3. A characterization method suitable for micro-nano-scale reservoir space of continental shale, characterized in that the method includes the following steps:

[0056] Step 1: Select several parallel core samples at a certain depth of the continental mud shale reservoir to be characterized, and use NMR to perform T2 spectrum analysis and check analysis on the core samples respectively; analyze and calculate the defined porosity of the core samples; The calibration analysis mentioned above is high-pressure mercury injection analysis or / and nuclear magnetic resonance porosity analysis;

[0057] Step: 2: Use the micro-nano CT analyzer to perform three-dimensional high-precision scanning of the core sample, initially identify the pores through the artificially defined gray threshold, and use step 1 to obtain the defined porosity and perform multiple thresholds on the porosity of the identified pores Optimal correction to determine the accurate gray threshold;

[...

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Abstract

The invention discloses a characterization method for the micro-nano-scale reservoir space of continental mud shale. The characterization method comprises: respectively carrying out T2 spectrum analysis and check analysis on a rock core sample by using a nuclear magnetic resonance instrument; analyzing and calculating the defined porosity of the rock core sample; carrying out three-dimensional high-precision scanning on the rock core sample by using a micro-nano CT analyzer, initially carrying out pore identification according to an artificially defined gray threshold, carrying out multi-threshold preferred correction on the porosity of the identified pore by using the defined porosity obtained in the previous step, and determining an accurate gray threshold; and constructing a three-dimensional model by using the micro-nano CT slices, establishing a rock sample reservoir space model by using the gray threshold defined in the step 2, and extracting the three-dimensional connectivity and the distribution characteristic parameters of the pore. According to the present invention, the characterization method is suitable for the characterization and evaluation of the micro-nano-scale storage space of the continental mud shale.

Description

technical field [0001] The invention relates to the field of oil field exploitation, in particular to a characterization method suitable for micro-nano-scale reservoir space of continental mud shale. Background technique [0002] With the in-depth advancement of shale oil and gas exploration and research work, represented by continental mud shale in the Jiyang Depression, it is found in the exploration research that the oil testing effect of special exploration wells is generally poor, while concurrent exploration wells are sometimes found, and even dozens of oil production per day have been found. square oil flow. Scanning electron microscope observation shows that the pore size of continental mud shale reservoir space is mainly distributed between micron and nanometer, and 1nm-10μm is the main spectrum range of its pore size. Therefore, it is necessary to innovate research methods that are different from sandstone macropores, develop new technologies suitable for evaluati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N23/046G01N24/08
CPCG01N15/088G01N23/04G01N24/081G01N2223/03G01N2223/649
Inventor 滕建彬方正伟李博刘宝军谢忠怀刘宁张守鹏朱丽鹏
Owner CHINA PETROLEUM & CHEM CORP