Porosity:

The pore space determines the amount of space available for storage of fluids.

Terms Related to Porosity

• Absolute porosity

  The percentage of the total bulk volume of a rock sample that is composed of pore spaces or voids. See porosity.

• Effective porosity

  The percentage of the bulk volume of a rock sample that is composed of interconnected pore spaces that allow the passage of fluids through the ...

• Pore

  An opening or space within a rock or mass of rocks, usually small and often filled with some fluid (water, oil, gas, or all three). ...

• Permeability (of a reservoir rock)

  The ability of a rock to transmit fluid through the pore spaces. - a key influence on the rate of flow, movement and drainage of ...

• Annular space

  The space surrounding one cylindrical object placed inside another, such as the space surrounding a tubular object placed in a wellbore. Also known as annulus.

• Free water

  1. Water produced with oil. It usually settles out within five minutes when the well fluids become stationary in a settling space within a vessel. ...

• Substructure

  The foundation on which the derrick or mast and usually the drawworks sit. It contains space for storage and well-control equipment.