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Method and device for determining elasticity modulus of clay, electronic equipment and medium

A technology of elastic modulus and determination method, which is applied in the field of geophysical exploration and can solve problems such as no longer adapting

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the empirical clay elastic modulus is no longer suitable for current rock physics modeling for shear wave prediction and lithology and mineral interpretation.

Method used

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  • Method and device for determining elasticity modulus of clay, electronic equipment and medium
  • Method and device for determining elasticity modulus of clay, electronic equipment and medium
  • Method and device for determining elasticity modulus of clay, electronic equipment and medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] figure 2 A flowchart showing the steps of a method for determining the elastic modulus of clay according to an embodiment of the present invention.

[0142] Such as figure 2 As shown, the method for determining the elastic modulus of clay includes: step 101, determine the main minerals, calculate the bulk modulus and density of the mixed modulus of the mineral matrix and the mixed fluid; step 102, replace the mixed modulus of the mineral matrix with fluid, and make the rock In the state of water saturation, the rock impedance is calculated from the logging data under water saturation, and the rock impedance is intersected with the total porosity; step 103, the bulk modulus and shear modulus of the rock are simulated by the contact cementation model, and the porosity- Impedance intersection graph; step 104, projecting the reservoir logging data points and mudstone interval data points into the porosity-impedance intersection graph; step 105, projecting the target inte...

Embodiment 2

[0160] Figure 9 A block diagram of a clay elastic modulus determining device according to an embodiment of the present invention is shown.

[0161] Such as Figure 9 As shown, the clay elastic modulus determination device includes:

[0162] The calculation module determines the main minerals, calculates the mixed modulus of the mineral matrix and the bulk modulus and density of the mixed fluid;

[0163] The intersection module replaces the mixed modulus of the mineral matrix with fluid to make the rock in a water-saturated state, calculates the rock impedance through the logging data under water saturation, and intersects the rock impedance with the total porosity;

[0164] The simulation module simulates the bulk modulus and shear modulus of the rock through the contact cementation model, and establishes the porosity-impedance cross diagram;

[0165] Projection module, which projects reservoir logging data points and mudstone interval data points into the porosity-impedan...

Embodiment 3

[0180] The present disclosure provides an electronic device comprising: a memory storing executable instructions; a processor running the executable instructions in the memory to implement the above method for determining the elastic modulus of clay.

[0181] An electronic device according to an embodiment of the present disclosure includes a memory and a processor.

[0182] The memory is used to store non-transitory computer readable instructions. Specifically, the memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache). The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, and the like.

[0183] The processor may be a central processing unit (CPU) or other form of processing unit having data processing c...

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Abstract

The invention discloses a clay elastic modulus determination method and device, electronic equipment and a medium. The method comprises the following steps: determining a main mineral, and calculating the mixed modulus of a mineral matrix and the bulk modulus and density of a mixed fluid; performing fluid replacement on the mineral matrix mixed modulus to enable the rock to be in a water saturation state, calculating rock impedance through logging data under water saturation, and intersecting the rock impedance with the total porosity; simulating a bulk modulus and a shear modulus of the rock through a contact cementation model, and establishing a porosity-impedance cross plot; projecting the reservoir logging data points and the mudstone layer section data points into the porosity-impedance cross plot; and projecting the data points of the target layer section into the porosity-impedance cross plot, and determining the elastic modulus value of the clay of the layer section. The method can solve the problem of prediction errors of speed, reservoir and the like caused by inaccurate elastic modulus of clay in different layers and sections in different regions, saves the cost and improves the efficiency.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, and more specifically, to a method, device, electronic equipment and medium for determining the elastic modulus of clay. Background technique [0002] The elastic properties of subsurface rocks are closely related to porosity, minerals, and fluids, and rock physics models require elastic moduli and densities for each "pure mineral" component such as quartz, calcite, and clay. Early rock physics models used single mineral properties to explain the P-wave velocity Vp of zero-porosity minerals; soft-sand models, hard-sand models, contact cementation, and inclusion theories also required the effective elastic shape of mixed minerals. Effective elastic properties depend on the volumetric content and spatial arrangement of the minerals present in the rock, largely on the elastic modulus of the individual minerals. [0003] The elastic modulus of pure minerals measured in the laboratory...

Claims

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Application Information

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IPC IPC(8): G01V99/00G01V11/00
CPCG01V11/00G01V20/00
Inventor 韩磊刘俊州时磊王震宇张丰麒刘兰峰薛明喜
Owner CHINA PETROLEUM & CHEM CORP
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