Unlock instant, AI-driven research and patent intelligence for your innovation.

Characterization method for micro-nano-scale reservoir space of continental mud shale

A micro-nano, mud shale technology, applied in permeability/surface area analysis, analysis by nuclear magnetic resonance, material analysis by radiation, etc. issues of comparability

Active Publication Date: 2018-08-24
CHINA PETROLEUM & CHEM CORP +1
View PDF12 Cites 5 Cited by
  • 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

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
  • Characterization method for micro-nano-scale reservoir space of continental mud shale
  • Characterization method for micro-nano-scale reservoir space of continental mud shale
  • Characterization method for micro-nano-scale reservoir space of continental mud shale

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;

[...

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
Lengthaaaaaaaaaa
Radiusaaaaaaaaaa
Average pore radiusaaaaaaaaaa
Login to View More

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

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): 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