Rocks that are impermeable prevent the movement of which fluids such as oil and natural gas?

Rocks that are impermeable prevent the movement of which fluids such as oil and natural gas?

• A. Air
• B. Water
• C. Magma
• D. Oil and natural gas

Answer: (D)

Impermeable rocks act as barriers to fluid flow. When fluids try to move through a rock, its ability to transmit them is governed by permeability. Rocks with very low permeability stop the vertical movement of fluids, which is a key reason hydrocarbons like oil and natural gas can become trapped in reservoirs: the impermeable layer above or around the porous rock prevents the oil and gas from migrating further upward. So, impermeable rocks prevent the movement of fluids such as oil and natural gas, helping to form and preserve hydrocarbon traps. (Keep in mind that, in general, impermeable rocks also hinder movement of other fluids like water or air, but the example here focuses on the hydrocarbons.)

Impermeable rocks act as barriers to fluid flow. When fluids try to move through a rock, its ability to transmit them is governed by permeability. Rocks with very low permeability stop the vertical movement of fluids, which is a key reason hydrocarbons like oil and natural gas can become trapped in reservoirs: the impermeable layer above or around the porous rock prevents the oil and gas from migrating further upward. So, impermeable rocks prevent the movement of fluids such as oil and natural gas, helping to form and preserve hydrocarbon traps. (Keep in mind that, in general, impermeable rocks also hinder movement of other fluids like water or air, but the example here focuses on the hydrocarbons.)