Rock dynamic physical property measurement system

Patent metadata

Field	Value
Publication number	US-12553813-B2
Application number	US-202218274791-A
Country	US
Kind code	B2
Filing date	Jan 7, 2022
Priority date	Jan 29, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

The present disclosure provides a system for measuring dynamic physical properties of a rock, the system being configured to simulate various states of the rock under various pressure and temperature conditions, so as to facilitate the research on dynamically changing physical properties of the rock under those conditions, the system including: a kettle; a sample clamping device including a lower end rod and a fixed upper end rod, and a sample cavity disposed between the upper end rod and the lower end rod and located in the kettle; an overburden pressure device configured to drive the lower end rod to move up and down; a sample sheath configured to sleeve a sample of the rock located in the sample cavity, the sample sheath being contractible inwards under pressure; a confining pressure maintaining device configured to control a pressure in the kettle; and a heater configured to control a temperature in the kettle.

First claim

The invention claimed is:

1 . A system for measuring dynamic physical properties of a rock, comprising:
a kettle; a sample clamping device, comprising a lower end rod and a fixed upper end rod which are distributed up and down respectively, wherein a sample cavity for accommodating a rock sample is disposed between the upper end rod and the lower end rod and is located in the kettle; a vertical overburden pressure device connected to the lower end rod to drive the lower end rod to move up and down; a confining pressure maintaining device, and a sample sheath which is disposed in the kettle to sleeve outside the sample located in the sample cavity, the sample sheath being contractible inwards under pressure; the confining pressure maintaining device is connected to the kettle to control a pressure in the kettle; a heater configured to control a temperature in the kettle; a bottom gas supply device, and a bottom gas inflow pipe with a first end disposed at a bottom of the sample cavity and a second end connected to the bottom gas supply device, the bottom gas supply device supplying gas to the bottom gas inflow pipe; and an upper gas volume device, and an upper gas outflow pipe with a first end disposed at a top of the sample cavity and a second end connected to the upper gas volume device.

2 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein a gas equalization block for abutting against a lower end of the sample is connected above the lower end rod, and the first end of the bottom gas inflow pipe is communicated with the gas equalization block which is provided with a plurality of equalization holes running through from top to bottom of the gas equalization block.

3 . The system for measuring dynamic physical properties of a rock according to claim 2 , wherein a diameter of the equalization hole is not more than 100 microns, and a density thereof is more than 2,000 pcs/cm 2 .

4 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein a gas collection block for abutting against an upper end of the sample is connected below the upper end rod, and the first end of the upper gas outflow pipe is communicated with the gas collection block which is provided with a plurality of collection holes running through from top to bottom of the gas collection block.

5 . The system for measuring dynamic physical properties of a rock according to claim 4 , wherein a diameter of the collection hole is not more than 100 microns, and a density thereof is more than 2,000 pcs/cm 2 .

6 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein the bottom gas supply device comprises a bottom pressure control piston, one side of which is provided with a supply cavity, and the other side of which is provided with a gas inflow cavity; and the second end of the bottom gas inflow pipe is connected to the gas inflow cavity, and pressurization by the supply cavity pushes the bottom pressure control piston to extrude the gas inflow cavity.

7 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein the upper gas volume device comprises an upper pressure control piston, one side of which is provided with an upper pressure control cavity, and the other side of which is provided with a gas outflow cavity; and the second end of the upper gas outflow pipe is connected to the gas outflow cavity, and pressurization by the upper pressure control cavity pushes the upper pressure control piston to extrude the gas outflow cavity.

8 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein a porous pipe is disposed in the kettle, and the porous pipe sleeves outside the sample sheath.

9 . The system for measuring dynamic physical properties of a rock according to claim 8 , wherein a diameter of holes distributed on the porous pipe is not more than 100 microns and a density thereof is more than 2,000 pcs/cm 2 .

10 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein the confining pressure maintaining device comprises a confining pressure control piston, one side of which is provided with a confining pressure control cavity, and the other side of which is provided with a confining pressure inlet cavity connected to the kettle, and pressurization by the confining pressure control cavity pushes the confining pressure control piston to extrude the confining pressure inlet cavity.

11 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein the overburden pressure device comprises an overburden pressure control device and an overburden pressure piston connected to the lower end rod, and the overburden pressure control device is connected to the overburden pressure piston to drive the overburden pressure piston to extend and contract up and down to cause the lower end rod to move up and down.

12 . The system for measuring dynamic physical properties of a rock according to claim 1 , further comprising a lower longitudinal distance measuring sensor, an upper longitudinal distance measuring sensor, and a plurality of lateral distance measuring sensors which are symmetrically disposed on a side wall of the sample, wherein the lower longitudinal distance measuring sensor is disposed on a bottom wall of the sample, and the upper longitudinal distance measuring sensor is disposed on a top wall of the sample.

13 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein the upper gas outflow pipe is provided with an upper valve and an upper pressure detection mechanism located at a side of the upper valve close to the first end of the upper gas outflow pipe.

14 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein the bottom gas inflow pipe is provided with a bottom valve and a bottom pressure detection mechanism located at a side of the bottom valve close to the first end of the bottom gas inflow pipe.

15 . The system for measuring dynamic physical properties of a rock according to claim 1 , wherein chemical compositions of the kettle are: Ni of 24.0% to 27.0%, Mo of 1.0% to 1.5%, Si being less than 1.0%, Cr of 13.5% to 16.0%, V of 0.1% to 0.5%, Al being less than 0.35%, C being less than 0.08%, S being less than 0.03%, Ti of 1.90% to 2.35%, Mn being less than 2.0%, B of 0.001% to 0.01%, and the remaining composition is Fe.

Assignees

• Petrochina Co Ltd

Inventors

• Hou Lianhua
• Lin Senhu
• Pang Zhenglian
• Ma Weijiao
• Liao Guangzhi
• Wang Jinghong

Classifications

• G01N33/24

  Earth materials (G01N33/42 takes precedence) · CPC title

• G01N1/44

  Sample treatment involving radiation, e.g. heat · CPC title

• G01N15/088 Primary

  Investigating volume, surface area, size or distribution of pores; Porosimetry · CPC title

• G01N15/0826 Primary

  and measuring fluid flow rate, i.e. permeation rate or pressure change · CPC title

• G01N15/0806

  Details, e.g. sample holders, mounting samples for testing · CPC title