Part 3: Compressibility A sandstone reservoir has a pore compressibility (C,) of 2.1*10 * psi- and a bulk modulus (K) of 105 psi. [5] Assume this reservoir is 100% saturated with a gas, which has a compressibility (C ) of 5 10-5 psi-1. What is the total compressibility of the reservoir? [6] If this same reservoir was filled with 100% oil instead of 100% gas, would you expect its total compressibility to be higher or lower than the value you calculated in [5]7 Explain your reasoning