Exxonmobil Upstream Research Company

Fuping Zhou

Dominique Gillard

Enru Liu

Pietro Valsecchi

Jon M Wallace

Yaping Zhu

Chinar R Aphale

Xiaoxia Xu

Kaushik Bandyopadhyay

A system and method to predict rock strength by directly inverting for petrophysical properties. In one embodiment, seismic data is received or obtained from a seismic survey (step). The seismic data are then conditioned (step) in order to prepare them for an inversion process (step). The inversion process has an embedded rock physics model that allows the inversion to be formulated based upon, and thereby outputting or calculating (step), petrophysical properties. Rock strength data may then be calculated from the petrophysical properties (step).

Method for predicting rock strength by inverting petrophysical properties

Systems and methods to inhibit packoff during drilling assembly removal from a wellbore, utilizing a drilling assembly that includes a transition region between a first section having a first cross-sectional area and a second section having a second cross-sectional area, wherein the second cross-sectional area is greater than the first cross-sectional area. The transition region includes a fluidizing assembly configured to partially fluidize a portion of the cuttings bed that is proximal to the transition region, and/or be in fluid communication with a flow control assembly configured to control flow rate of a fluidizing stream from the fluidizing assembly and to the portion of cuttings bed.

Systems and methods to inhibit packoff formation during drilling assembly removal from a wellbore

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Sugar Land, TX, United States of America

Fuping Zhou