简答题 翻译：Gas and oil, either as separate fluids or in mixtures, change their state or phase as reservoir pressure changes.

问答题翻译：Plant organisms are far more abundant than animals, and the latter are directly or indirectly when carnivorous, dependent on the former.

问答题翻译：Viscosity μ is the measure of fluids internal resistance to flow. It has a dimension of force time Ft per unit area L.

问答题翻译：In the laboratory measurement of porosity, it is necessary to determine only two of the three basic paramenters.

问答题翻译：The permeability of a porous medium may be determined from samples extracted from the formation or by in-place testing.

问答题翻译：An oil field may have several hundred wells with flow lines that carry crude oil from the wells to the lease tanks.