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- W2373502308 abstract "The borehole instability in practical engineering should be predicted and handled as soon as possible,so a study on the real-time prediction of borehole instability(referring to the prediction of the borehole stability under bit based on the information from drilled sections) is of significance.The present paper introduced a method to predict borehole instability in real time based on actual drilling and well-logging data.The borehole to be deformed was regarded as an ellipse and the stress distribution around borehole derived from the complex potential method and superposition principle was used to correlate the borehole deformation(including collapse,necking,cracking,etc.) with rock mechanical properties,earth stress and pore pressure as well as mud density with physical and chemical properties.Based on these relationships,mud logging and well-logging data were employed to inversely compute earth stress and pore pressure.Subsequently,the density and acoustic travel-time data of strata under the certain depth of bit were deduced from a lithomechanical model established by seismic inversion,and then they were employed to predict the borehole instability under bit in real time.The application of this approach to a northeast Sichuan Basin gained a satisfactory result." @default.
- W2373502308 created "2016-06-24" @default.
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- W2373502308 date "2011-01-01" @default.
- W2373502308 modified "2023-10-12" @default.
- W2373502308 title "Real-time prediction of borehole instability based on actual drilling data" @default.
- W2373502308 hasPublicationYear "2011" @default.
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