QuestionQuestion

Part 1
1. What are the definitions of porosity and permeability?
If the pore volume is 4.6 cc and bulk volume is 20 cc for a core sample, what’s the porosity?
2. What’s the definition of saturation of a fluid?
There are three phases in a reservoir: oil, gas, and water.
Assuming that all pores are occupied by fluids and the volume for each phase is as follows:
Water: 200,000 bbl
Oil: 650,000 bbl
Gas: 150,000 bbl
What are the saturations for oil, gas, and water?
3. Define 2D, 3D, and 4D seismic.

Part 2
1. What are the definitions of porosity and permeability?
2. What are the theories for petroleum origins?
3. What’s the definition of saturation of a fluid?
4. What is Darcy's law?
5. What are the three types of sound sources for marine seismic methods?
6. What is reservoir evaluation?
7. What are purposes of DST?
8. What is SP log? What information can we expect to get from an SP log?

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1. What are the definitions of porosity and permeability? If the pore volume is 4.6cc and bulk volume is 20cc for a core sample, what is the porosity?

Porosity is the measure of the empty spaces in a material, measured by the fraction of the volume of voids over the total volume. On the other hand, permeability is the measure of the ability of a material to allow fluids to pass through it.

Given the pore volume of 4.6cc and bulk volume of 20cc, the porosity is computed by the formula:
Porosity= pore volume/ bulk volume...
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