2. The data below was obtained from a compressibility experiment on a core sample whose bulk volume is 52.0 cm³ and initial pore volume is 8.82 cm³. The sample's pore space is initially filled with water. Estimate the sample's pore-volume compressibility at 1000 and 2000-psi net overburden pressures. Pp (psi) 14.7 50 50 Pob (psi) 500 750 1000 Vwp (cm³) 0.222 0.328 0.361 0.452 0.470 0.481 0.487 Vwp is total water squeezed out of sample at each step. Solve using these equations if possible : P ob,net = 100 100 500 500 1500 2000 2500 3000 3500 0.494 Pob 1 ΔΦ Cp = Cf= Φ ΔΡob,net = 1000 1000 0.85 P. р 1 (Plab-Pres) Plab (Plab-Pres) obinet obinet 4000 0.506

Fig: 1