If a sandstone reservoir has φ porosity and the area is A, and thickness is h and water saturation is Sw then what will be the Original Hydrocarbon in place?

If a sandstone reservoir has φ porosity and the area is A, and thick

1.	If a sandstone reservoir has φ porosity and the area is A, and thickness is h and water saturation is Sw then what will be the Original Hydrocarbon in place?
A.	AhφSw
B.	Ahφ/(1-Sw)
C.	Ahφ(1-Sw)
D.	Ah(1-φ) Sw
Answer» D. Ah(1-φ) Sw