Schlumberger Technology Corporation

Richard Anthony Birchwood

Colin Michael Sayers

Ali Mese

Tom R Bratton

Rishi Dev Singh

A method for performing field operations is disclosed. The method includes obtaining a first set of acoustic radial profiles of a subterranean formation prior to induction of a fracture disposed about the wellbore, obtaining a second set of acoustic radial profiles of the subterranean formation subsequent to the induction of the fracture, comparing the first set of acoustic radial profiles and the second set of acoustic radial profiles based on a pre-determined criterion to generate a comparison result, determining, based on the comparison result, an orientation of one or more portions of the fracture, and adjusting the operations of the oilfield based on the orientation.

Determining fracture orientation using wellbore acoustic radial profiles

A method for constructing elastoplastic property correlations in multicomponent particulate systems. The method includes obtaining parameters from geophysical data of a sediment-hydrate system, where the parameters include sand p, and where sis a hydrate saturation and pis a confining pressure. The method further includes determining a Young's modulus (E) of the sediment-hydrate system using the parameters and a correlation, where the correlation is and where &#x3b1;=p/c and c is a scaling variable with dimensions of pressure. The method further includes adjusting a field operation based on the Young's modulus of the sediment-hydrate system.

Estimating in situ mechanical properties of sediments containing gas hydrates

In general, the invention relates to a method for pore pressure prediction. The method includes obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location, calculating an effective stress at the pre-drilling location using a stress-velocity relationship equation, the compressional wave (P-wave) velocity and the shear wave (S-wave) velocity, obtaining a total stress at the pre-drill location, calculating a predicted pore pressure, at the pre-drill location, using the effective stress, the total stress and a stress-pressure relationship equation, and adjusting a drilling operation associated with the pre-drill location, based on the predicted pore pressure.

Method and system for pre-drill pore pressure prediction

In general, the invention relates to a method for managing a drilling operation in a multicomponent particulate system. The method includes obtaining a plurality of geophysical and petrophysical data associated with the multicomponent particulate system, obtaining at least one measurement of an elastoplastic property of the multicomponent particulate system, calculating at least one elastoplastic property of the multicomponent particulate system using the at least one measurement of the elastoplastic property of the multicomponent particulate system, constructing at least one correlation between the at least one elastoplastic property and the at least one property corresponding to the plurality of geophysical and petrophysical data, estimating at least one elastoplastic property of sediments in a formation of interest using the at least one correlation, evaluating mechanical integrity of the formation of interest using the at least one elastoplastic property of sediments, and adjusting the drilling operation based the evaluation.

Method and system for managing a drilling operation in a multicomponent particulate system

A method for pore pressure prediction. The method includes obtaining a stress sensitivity coefficient, obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location and obtaining a first predicted pore pressure. Further, the method includes iteratively performing calculating a total stress value associated with the pre-drill location using the first predicted pore pressure associated with the pre-drill location, and calculating a second predicted pore pressure associated with the pre-drill location using a stress-pressure relationship equation, a stress-velocity relationship equation, the stress sensitivity coefficient, a reference location, and at least one selected from a group consisting of the P-wave velocity and the S-wave velocity for the pre-drill location, and adjusting a drilling operation associated with the pre-drill location, based on the second predicted pore pressure.

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Houston, TX, United States of America

Richard Anthony Birchwood