Chapter 8

Question 1

Porosity

Answer 1

Ratio of pore space in a rock to the bulk volume of that rock.

Question 2

Permeabilty

Answer 2

Ease of which a fluid can pass through pore structure

Question 3

Assumptions of Darcys Law

Answer 3

1- Steady state flow
2- laminar flow
3- rock saturated fully with one fluid
4- fluid does not react with rock
5- rock is isotropic

Question 4

Fluid Saturations

Answer 4

When more than one fluid is present in the pores.

Question 5

Capillary Pressure

Answer 5

Exists when two immiscible phases are present

Question 6

Petroleum Definition

Answer 6

Mixture of naturally occurring hydrocarbons that can exist as a solid, liquid, or gaseous state.

Question 7

Hydrocarbon Compounds

Answer 7

Alkanes - Saturated CnH2n+2
Alkene - Undersaturated CH
Cycloparaffins saturated single bond CnH2n

Question 8

Non Hydrocarbon Compounds

Answer 8

Water, Oxygen, Carbon Dioxide and sulphur

Question 9

Gas Solubility

Answer 9

Rs, number of cubic feet of gas measured at standard conditions

Question 10

Oil formation volume factor

Answer 10

Bo, Volume occupied by the oil between surface conditions and reservoir

Question 11

Phase Behaviour

Answer 11

System- Amount of substances within given boundaries
Components- pure substances
Phases- Phases separated by definite boundaries ie ice liquid water vapour
Equilibrium - No changes take place.

Question 12

Reservoir Classifications

Answer 12

Low Shrinkage
High Shrinkage
Retrogase condensate gas
Wet and Dry gas