A Breakdown Pressure Prediction Model with Borehole Geometry Effect Considered

Document Type

Conference Proceeding

Publication Date

1-1-2023

Abstract

Recently a set of engineering charts have been developed for the time-dependent stress and pore pressure responses at the wellbore surface under the ramp-type, finite-length fluid injection conditions, based on a semi-analytical solution with the use of Laplace-Fourier integral transform technique, to facilitate the prediction of borehole breakdown pressure for hydraulic fracturing operating practice. The charts were presented in a non-dimensionalized form to cover a wide range of borehole/rock parameters, which, in combination with the approximate solution for the impermeable borehole drilling problem, can be conveniently utilized to gain a rapid estimation of breakdown pressure. In this work, a borehole breakdown pressure prediction software was developed to generalize the applications of these engineering charts. Firstly, the engineering charts for an arbitrary borehole interval length-to-radius ratio are constructed from these charts by interpolation or extrapolation. Secondly, the breakdown pressure for a given borehole, in-situ condition, formation properties and pumping schedule, is looked up automatically with higher accuracy and faster speed than the method adopted in previous work.

Publication Source (Journal or Book title)

SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings

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