1. overview:
Shale gas mainly exists in the matrix and fracture pores in free state and adsorption state. Shale gas reservoir has low porosity and permeability characteristics, and the most significant difference from regular natural gas reservoir is that it is an autogenous and self-storage system. Shale gas adsorption state exists in the matrix pores of shale, and its inflow into wellbore needs to undergo the process of analysis into free gas, concentration difference diffusion process and flow potential seepage process. This instrument mainly simulates reservoir conditions and makes a basic evaluation of shale gas diffusion law and diffusion efficiency.
Device function:
1. To study the mechanism of shale gas seepage by observing the dynamic characteristics of methane molecules passing through shale slices;
2. By observing the relationship between the flux of gas molecules and the pressure difference through thin sections of shale cores with different levels of pore structure;
3. Simulate formation conditions to measure shale gas diffusion coefficient;
2. main technical indicators:
1. Specification of sample room: Φ25 × 1~50mm;
2. System pressure: ≤ 70MPa;
3. Ring pressure: ≤ 50MPa;
4. Test pressure: 0.01 ~ 30MPa;
5. Simulation temperature: RT ~ 150 ℃;
6. Gas molecular concentration detection: gas chromatography