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HWK 6 solution

# HWK 6 solution - PGE 362 Homework 6 Solution Due at the...

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PGE 362 Homework 6 Solution Due at the start of lecture on April 6th. Data Set: 6 1 psi/ft 0.65 psi/ft =0.6 10,000' 1 10 psi 0.15 V pore p D E x v σ α = = = = = (1) Please compute the three principle stresses at the given depth. ( 29 ( 29 ( 29 ( 29 ( 29 Hmin Hmax 10,000 1 10,000 psi 10,000 0.65 6,500 psi 0.15 10,000 0.6 6500 0.6 6500 4,976 psi 1 0.15 10,000 4976 7488 psi 2 V pore p = = = = = - + = - + = = (2) For a vertical well please determine (a) the break out pressure at the well ( 29 min max 3 3 4976 7488 6500 940 psi b H H pore p p = - - = - - = (b) the break out fracture direction (c) the far field (natural) fracture direction You may neglect tensile and thermal stresses. The break out and far field directions are identical and will be perpendicular to the direction of the minimum horizontal stress.

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(3) For a horizontal well drilled parallel to the maximum horizontal stress please determine (a) the break out pressure at the well ( 29 min 3 3 4976 10,000 6500 1572 psi b H V pore p p σ
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HWK 6 solution - PGE 362 Homework 6 Solution Due at the...

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