ODUNGE STANS
more than 4 weeks ago
State the factors affecting each of the following properties: Porosity Permeability
1 view
1 view
2 answers
Sort By
ChatGPT
more than 4 weeks ago
Porosity:
1. Grain size and shape: Smaller, more rounded grains tend to have higher porosity.
2. Sorting: Well-sorted sediments have higher porosity compared to poorly sorted sediments.
3. Cementation: Cemented sediments have lower porosity compared to uncemented sediments.
4. Compaction: Compacted sediments have lower porosity.
5. Lithology: Different rock types have different inherent porosities.
Permeability:
1. Porosity: Higher porosity generally leads to higher permeability.
2. Grain size and shape: Larger, well-connected grains tend to have higher permeability.
3. Sorting: Well-sorted sediments have higher permeability compared to poorly sorted sediments.
4. Cementation: Cemented sediments have lower permeability.
5. Fracturing: Rocks with fractures or faults have higher permeability.
6. Fluid viscosity: Higher viscosity fluids have lower permeability.
1. Grain size and shape: Smaller, more rounded grains tend to have higher porosity.
2. Sorting: Well-sorted sediments have higher porosity compared to poorly sorted sediments.
3. Cementation: Cemented sediments have lower porosity compared to uncemented sediments.
4. Compaction: Compacted sediments have lower porosity.
5. Lithology: Different rock types have different inherent porosities.
Permeability:
1. Porosity: Higher porosity generally leads to higher permeability.
2. Grain size and shape: Larger, well-connected grains tend to have higher permeability.
3. Sorting: Well-sorted sediments have higher permeability compared to poorly sorted sediments.
4. Cementation: Cemented sediments have lower permeability.
5. Fracturing: Rocks with fractures or faults have higher permeability.
6. Fluid viscosity: Higher viscosity fluids have lower permeability.
0
Google Gemini AI
more than 4 weeks ago
Porosity
- Grain size: Smaller grains result in a higher porosity.
- Grain shape: Irregular grains create more voids than spherical grains.
- Grain packing: Loosely packed grains increase porosity, while tightly packed grains decrease it.
- Sorting: Poorly sorted sediments (with a wide range of grain sizes) tend to have higher porosity.
- Compaction: Overburden pressure compresses sediment and reduces porosity.
- Cementation: Minerals that bind together grains (e.g., calcite) reduce porosity.
- Diagenesis: Chemical reactions within the sediment can alter porosity.
Permeability
- Porosity: Higher porosity generally leads to higher permeability.
- Grain size: Larger grains provide more interconnected pores for fluid flow, increasing permeability.
- Grain shape: Irregular grains interlock and reduce permeability more than spherical grains.
- Sorting: Well-sorted sediments have a more uniform pore size distribution, improving permeability.
- Fractures and joints: Fractures and joints provide additional pathways for fluid flow, enhancing permeability.
- Compaction: Compaction reduces both porosity and permeability.
- Cementation: Minerals that fill pores can significantly reduce permeability.
- Diagenetic alteration: Minerals that precipitate in pores can block fluid flow, lowering permeability.
- Fluid properties: Viscosity and density of the fluid affect permeability.
- Grain size: Smaller grains result in a higher porosity.
- Grain shape: Irregular grains create more voids than spherical grains.
- Grain packing: Loosely packed grains increase porosity, while tightly packed grains decrease it.
- Sorting: Poorly sorted sediments (with a wide range of grain sizes) tend to have higher porosity.
- Compaction: Overburden pressure compresses sediment and reduces porosity.
- Cementation: Minerals that bind together grains (e.g., calcite) reduce porosity.
- Diagenesis: Chemical reactions within the sediment can alter porosity.
Permeability
- Porosity: Higher porosity generally leads to higher permeability.
- Grain size: Larger grains provide more interconnected pores for fluid flow, increasing permeability.
- Grain shape: Irregular grains interlock and reduce permeability more than spherical grains.
- Sorting: Well-sorted sediments have a more uniform pore size distribution, improving permeability.
- Fractures and joints: Fractures and joints provide additional pathways for fluid flow, enhancing permeability.
- Compaction: Compaction reduces both porosity and permeability.
- Cementation: Minerals that fill pores can significantly reduce permeability.
- Diagenetic alteration: Minerals that precipitate in pores can block fluid flow, lowering permeability.
- Fluid properties: Viscosity and density of the fluid affect permeability.
0
