# HWK 6 - (4 For a horizontal well drilled parallel to the...

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PGE 362 Homework 6 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. (2) For a vertical well please determine (a) the break out pressure at the well (b) the break out fracture direction (c) the far field (natural) fracture direction You may neglect tensile and thermal stresses. (3) For a horizontal well drilled parallel to the maximum horizontal stress please determine (a) the break out pressure at the well (b) the break out fracture direction (c) the far field (natural) fracture direction You may neglect tensile and thermal stresses.

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Unformatted text preview: (4) For a horizontal well drilled parallel to the minimum horizontal stress please determine (a) the break out pressure at the well (b) the break out fracture direction (c) the far field (natural) fracture direction You may neglect tensile and thermal stresses. (5) If a practical limit of 0.5" is assumed for fracture width what is (a) The radius of the fracture in feet using the Penny Model? (b) The fracture half length in feet using the KGD model? (c) The fracture height in feet using the PKN model? You may assume the net fracturing pressure is 100 psi and the rock properties are as shown in the data set....
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## This note was uploaded on 02/13/2012 for the course PGE 362 taught by Professor Bommer during the Spring '08 term at University of Texas.

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HWK 6 - (4 For a horizontal well drilled parallel to the...

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