PETE 2031 Chapter 2 and 3a

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

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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

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Porosity formula

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

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

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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.

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

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

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Types of Induced Porosity

• Solution Porosity

• Fractures, Fissures and Joints

• Dolomitization

• All of them

• None