Core gas permeability tester

Supply of core gas permeability measuring instrument, specialized in core gas permeability measuring instrument, *, boutique, where can I find it for sale

STL-3 type

1、 Instrument functions

Used to measure the conventional gas permeability of formation cores.

2、 Main technical indicators

Measurement range: 0.01~8000 × 10-3μm2

Measurement pressure: less than 10MPa

Sealing pressure: 10MPa

Analysis of core size: Φ 25 × 25-80mm

Flow meter range: 6-60mL/min

60～600mL/min

25～250mL/min

160～1600mL/min

Measurement error: Low permeability ≤ 10%

Medium to high ≤ 10%

3、 The structural composition and technical parameters of each component of the instrument

The instrument consists of a high-pressure regulating system, a low-pressure regulating system, a core gripper, a flow meter, a pressure measurement system, valves and pipelines, etc.

1. High pressure regulating system

Composed of a high-pressure regulating valve, the inlet pressure of the regulating valve is 20MPa, and the outlet pressure can be adjusted from 0 to 10MPa.

The adjusted pressure value can be displayed on the precision pressure gauge behind the valve.

2. Low pressure regulating system

It consists of a low-pressure regulating valve and a low-pressure gauge. The inlet pressure of the low-pressure regulating valve is less than 1.2 MPa, and the outlet pressure can be adjusted from 0 to 0.8 MPa.

The adjusted pressure value can be displayed by a low-pressure precision pressure gauge.

3. Core clamp

Ring pressure: 20MPa

Applicable core specifications: Φ 25 × 25-80mm

4. Gas flowmeter

Install 4 sets of gas flow meters with different ranges at the core outlet, and select them according to the flow rate during the experiment.

Range: 6-60mL/min

25～250mL/min

60～600mL/min

160～1600mL/min

5. Pressure measurement

The test pressure is measured using precision pressure gauges with ranges of 1.6MPa, 10MPa, and 0.16MPa, while the ring pressure is measured using a pressure gauge with a range of 40MPa.

6. Valve and pipeline processes

Using a Φ 3 × 0.5mm stainless steel pipeline and DW3 high-pressure needle valve to connect the pipeline process, with a pressure resistance of 20MPa

4、 Workflow

5、 Operation

1. Load the core into the core clamp and tighten it tightly

2. Operate the manual booster pump until the desired ring pressure value (all valves are closed) is reached. The ring pressure value is generally 1-2MPa higher than the displacement pressure.

3. Open the ring pressure valve, apply ring pressure to the gripper, seal the rock core, and close the ring pressure valve.

4. Loosen the high-pressure regulating valve, open valve 1 to release the previously regulated pressure, and close valve 1.

5. Adjust the high-pressure regulator valve to the test pressure again.

6. Open valve 1 to allow gas to flow into the rock core.

7. Choose a suitable flow meter to measure the gas flow rate.

Generally selected from large to small.

When the test pressure and flow rate are stable, record the test pressure and flow rate values.

9. Calculate gas permeability based on pressure, flow rate, and other parameters.

10. If the test pressure is below 1MPa, a low-pressure regulator can be used to adjust the pressure. When adjusting, first adjust the outlet of the high-pressure regulator to below 1.2MPa (note: it cannot exceed 1.2MPa, otherwise it will damage the low-pressure regulator). Open valve 2 and valve 3 again, adjust the low-pressure regulator valve to the desired pressure.

After the test is completed, first loosen the high-pressure regulating valve, then open the ring pressure and release the ring pressure, and finally remove the core.

6、 Precautions

1. The core holder must be inserted into the core and tightened before applying ring pressure; Otherwise, it will break the rubber sleeve.

2. The outlet pressure of the low-pressure regulating valve should be lower than 1.2MPa, otherwise it will explode the low-pressure regulating valve.

When using a higher test pressure, valves 2 and 3 at both ends of the low-pressure regulator must be closed tightly.

Only one flowmeter can be used, and the other three must be turned off.

600ml/min

160～1600mL/min

Measurement error: Low permeability ≤ 10%

Medium to high ≤ 10%