Datadepth 10000 ftSo 0.7Rho f 165 lb/ft3Rho o 50.5 lb/ft3Cf 0.000003 psi-1Co 0.00001 psi-1Cw 0.000003 psi-1PR psi

solution1- Calculate absolute overbudenơ 11459.00 psi2- Calculate Biot's poro elastic constantCt 0.00α 0.723- Calculate pore pressureP 3507.00 psi4- Calculate effective stressơeff 8918.00 psi

Datadepth 10000 ftSo 0.7Rho f 165 lb/ft3 depth overburden hor. StressRho o 50.5 lb/ft3 0 0 0Cf 0.000003 psi-1 10000 11459 5514Co 0.00001 psi-1Cw 0.000003 psi-1Poission ratio 0.25Pr 3507 psiơv 11459 psiα 0.72depletion 1000 psi

solutionơH min 5514 psiơH min' 2972 psi∆ơH min 483 psi

0 2 0 0 0 4 0 0 0 6 0 0 0 8 0 0 0 1 0 0 0 0 1 2 0 0 0 1 4 0 0 00

2000

4000

6000

8000

10000

12000 overburden original hor. stress

critical depth for hor. frac

new ground level

new overburden

0 2 0 0 0 4 0 0 0 6 0 0 0 8 0 0 0 1 0 0 0 0 1 2 0 0 0 1 4 0 0 00

2000

4000

6000

8000

10000

12000 overburden original hor. stress

critical depth for hor. frac

new ground level

Datadepth 10000 ftơH min 5000 psiơH max 6500 psiPp 3700 psiTensile stength 500 psiPoission ratio 0.25α 0.70

solution1- Calculate upper limit for break down pressurePbreak 5300 psi2- Calculate lower limit for break down pressureή 0.233Pbreak 4743

Est