Podcast
Questions and Answers
What is the main reason a 'close packed' array of spheres is considered to be the most efficient way of packing uniform spheres?
What is the main reason a 'close packed' array of spheres is considered to be the most efficient way of packing uniform spheres?
- It has the lowest possible porosity (correct)
- It is the most visually appealing arrangement
- It is easier to calculate the porosity
- It has the highest possible porosity
What can be inferred about the porosity of arrangements where spheres are not uniformly arranged?
What can be inferred about the porosity of arrangements where spheres are not uniformly arranged?
- The porosity will remain the same as in a 'close packed' array
- The porosity will be lower than in a 'close packed' array
- The porosity cannot be calculated
- The porosity will be higher than in a 'close packed' array (correct)
What happens to porosity as sorting becomes poorer in a model where smaller spheres are introduced between larger spheres?
What happens to porosity as sorting becomes poorer in a model where smaller spheres are introduced between larger spheres?
- Porosity increases (correct)
- Porosity remains constant
- Porosity becomes negative
- Porosity decreases
How does the introduction of plane parallel-sided cracks with a well-defined aperture into a solid block relate to understanding fracture porosity?
How does the introduction of plane parallel-sided cracks with a well-defined aperture into a solid block relate to understanding fracture porosity?
What is a key aspect of practical petrophysics according to the text?
What is a key aspect of practical petrophysics according to the text?
What is the significance of extending 'close packed' arrays of spheres in all directions?
What is the significance of extending 'close packed' arrays of spheres in all directions?
What is the constant that links flow-rate to the pressure applied to a fluid?
What is the constant that links flow-rate to the pressure applied to a fluid?
What are the SI units of permeability?
What are the SI units of permeability?
What is the commonly used unit for permeabilities in the petroleum industry?
What is the commonly used unit for permeabilities in the petroleum industry?
What type of reservoirs are often defined as having average permeabilities of less than 0.1 mD?
What type of reservoirs are often defined as having average permeabilities of less than 0.1 mD?
What type of samples with permeabilities are not unusual in tight gas reservoirs?
What type of samples with permeabilities are not unusual in tight gas reservoirs?
What type of systems are often considered when thinking about what controls permeability?
What type of systems are often considered when thinking about what controls permeability?
What type of packing results in the lowest porosity possible with uniform spherical grains?
What type of packing results in the lowest porosity possible with uniform spherical grains?
In the context of porosity, what effect does introducing smaller spheres between larger spheres have on sorting?
In the context of porosity, what effect does introducing smaller spheres between larger spheres have on sorting?
Which type of packing arrangement is easier to calculate but has a higher porosity than the 'close packed' array?
Which type of packing arrangement is easier to calculate but has a higher porosity than the 'close packed' array?
What could be the consequence of elongating the grains in a model based on sphere packing?
What could be the consequence of elongating the grains in a model based on sphere packing?
What kind of porosity is expected in arrangements where spheres are not uniformly arranged?
What kind of porosity is expected in arrangements where spheres are not uniformly arranged?
How does the concept of integrating idealized models with real rock experimental results relate to practical petrophysics?
How does the concept of integrating idealized models with real rock experimental results relate to practical petrophysics?
