PETE 2031 Chapter 2 and 3a

the three most common types of sedimentary rocks associated with petroleum reservoirs.

Routine Core Analysis

• Porosity

• Grain Density

• Permeability

• Fluid Saturation

• Capillary Pressure

Special Core Analysis

• Electrical Properties

• Wettability

• Capillary Pressure

• Relative Permeability

• Fluid Saturation

a measure of space available for storing hydrocarbons in rocks, and hence it is an important property

Porosity formula

the total porosity of the rock regardless of whether or not the individual pores are connected

that part of the total porosity which is contributed by the “interconnected pores”

Porosity formed at the time the sediment was deposited.

It is the intergranular porosity where the voids are between the sedimentary grains.

It is a characteristic of sedimentary rocks such as sandstones, conglomerates and some limestones.

the porosity due to the voids formed after the sediment was deposited.

Voids bear no relation to the form of the original sedimentary particles.

Types of Induced Porosity

• Solution Porosity

• Fractures, Fissures and Joints

• Dolomitization

• All of them

• None