Device and method for measuring overburden of injected gas in cyclic gas injection development of condensate gas reservoir

Patent metadata

Field	Value
Publication number	US-10947836-B2
Application number	US-202016941954-A
Country	US
Kind code	B2
Filing date	Jul 29, 2020
Priority date	Aug 6, 2019
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

The present invention provides a device and a method for measuring overburden of injected gas in cyclic gas injection development of condensate gas reservoir. The device comprises sand packed model and temperature control system. The temperature control system is nested outside the sand packed model. The sand packed model comprises sand pack cell, four gas inlets, four gas outlets, bracket, direction control component, rotating shaft, upper cover, lower cover, fixing bolts, two top pressuring inlets, pressure transmission rods, pressure transfer piston and multiple gas sampling ports. The sand pack cell can be filled with quartz sand of different particle size and composition, and the angle of the whole device is adjusted by the direction control component.

First claim

What is claimed is:

1. A device comprising:
a container with a cavity configured to contain sand;
a first gas inlet, a second gas inlet, a third gas inlet, a fourth gas inlet, a first gas outlet, a second gas outlet, a third gas outlet, and a fourth gas outlet, each of which is fluidly connected with the cavity;
a support;
a shaft;
gas sampling ports fluidly connected with the cavity;
a piston in the cavity;
a pressuring inlet configured to apply pneumatic pressure on the piston, thereby pressing the sand in the cavity;
wherein the container is connected to the support through the shaft, and is configured to incline relative to the support by rotating around the shaft.

2. The device according to claim 1 , further comprising a temperature control system;
wherein the temperature control system comprises a heating plate, an insulating plate, an insulation material, and a temperature controller;
wherein the heating plate is sheathed outside the container, the insulating plate is sheathed outside the heating plate, and the insulation material is sheathed outside the insulating plate;
wherein the temperature controller is configured to control a temperature of the heating plate;
wherein the insulating plate is configured to electrically insulate the heating plate; and
wherein the insulation material is configured to reduce heat loss.

3. The device according to claim 1 , wherein the container comprises an alloy steel with a pressure resistance of 70 MPa.

4. The device according to claim 1 , further comprising a gear box configured to drive the shaft.

5. The device according to claim 1 , wherein a number of the gas sampling ports is not fewer than 16.

6. The device according to claim 1 , further comprising:
a first intermediate container and a second intermediate container, the first intermediate container and the second intermediate container being configured to contain different gases;
a first valve and a second valve;
back pressure valves;
a first pressure gauge and a second pressure gauge;
a first pump fluidly connected with an inlet end of the first intermediate container and an inlet end of the second intermediate container;
a second pump;
wherein an outlet end of the first intermediate container is fluidly connected with an inlet end of the first valve, an outlet end of the second intermediate container is fluidly connected with an inlet end of the second valve, and outlet ends of the first valve and the second valve are fluidly connected with the first gas inlet, the second gas inlet, the third gas inlet and the fourth gas inlet through a first pipeline;
wherein the first pressure gauge is configured to measure pressure in the first pipeline;
wherein the first gas outlet, the second gas outlet, the third gas outlet and the fourth gas outlet are fluidly connected with the back pressure valves;
wherein the back pressure valves are configured to control a gas outflow rate at the first gas outlet, the second gas outlet, the third gas outlet and the fourth gas outlet;
wherein the back pressure valves are fluidly connected with the second pump through a second pipeline; and
wherein the second pressure gauge is configured to measure pressure in the second pipeline.

7. The device according to claim 6 , wherein the second intermediate container is configured to contain carbon dioxide, nitrogen, methane or any mixture thereof.

8. The device according to claim 1 , further comprising a rod, an upper cover and a lower cover;
wherein the upper cover and the lower cover are respectively fixed on an upper end and a lower end of the cavity, and configured to seal the cavity;
wherein the rod is connected to the piston, configured to slide through a hole in the upper cover, and configured to prevent the piston from tilting.

9. A method of using the device of claim 1 , comprising:
loading the cavity with a layer of sand with a predetermined permeability K and a predetermined thickness, by pressing the layer of sand with the piston;
adjusting inclination of the container;
sealing the cavity;
heating the sand to a predetermined temperature;
saturating the sand with a first gas to a predetermined pressure, by injecting the first gas into the cavity through the first gas inlet, the second gas inlet, the third gas inlet and the fourth gas inlet;
stopping injection of the first gas into the cavity;
injecting a second gas into the cavity through the first gas inlet, the second gas inlet, the third gas inlet and the fourth gas inlet;
during injection of the second gas, taking samples from the gas sampling ports;
determining compositions of the samples; and
determining gas transport characteristics of the layer of sand based on the compositions.

10. The method of claim 8 , further comprising determining a pressure P at which the layer of sand is pressed with the piston, based on the predetermined permeability K, using formulas (1)-(3):

K
=

(

1
-

4
⁢

2

3

⁢
π
⁢

r
3

-

4
⁢

2

⁢

π
⁡

(

3
⁢
r

-

a
2

)

⁢

(

a
2

)

Assignees

• Univ Beijing Science & Technology

Inventors

• Zhu Weiyao
• Huang Kun
• Xia Jing
• Jiang Tongwen
• Yue Ming
• Luo Kai
• Song Zhiyong
• Wang Baichuan
• Kong Debin

Classifications

• G01N15/08 Primary

  Investigating permeability, pore-volume, or surface area of porous materials · CPC title

• G01N11/00

  Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties · CPC title

• G01N30/06

  Preparation · CPC title

• E21B43/168

  Injecting a gaseous medium · CPC title

• G01N2015/0015

  in solids · CPC title