While-drilling services are effective and efficient in supporting drilling decisions. Real-time processing of seismic borehole data can help drilling operations. We study the problem of bit localization in a vertical layered media by using while-drilling measurements. The signal emitted by the bit is recorded by surface sensors and it is processed in order to obtain direct arrival traveltimes. The traveltimes are the input of a Bayesian inversion procedure for the estimation of the bit position and of the velocity model: the results are the estimated values and their associated uncertainty. We propose a parameterization of the problem and we show the conditioning analysis. We test the inversion strategy on realistic cases with significant results.

Estimation of bit position and velocity model while drilling

BERNASCONI, GIANCARLO;ROVETTA, DIEGO
2007-01-01

Abstract

While-drilling services are effective and efficient in supporting drilling decisions. Real-time processing of seismic borehole data can help drilling operations. We study the problem of bit localization in a vertical layered media by using while-drilling measurements. The signal emitted by the bit is recorded by surface sensors and it is processed in order to obtain direct arrival traveltimes. The traveltimes are the input of a Bayesian inversion procedure for the estimation of the bit position and of the velocity model: the results are the estimated values and their associated uncertainty. We propose a parameterization of the problem and we show the conditioning analysis. We test the inversion strategy on realistic cases with significant results.
2007
SEG Technical Program Expanded Abstracts 2007
File in questo prodotto:
File Dimensione Formato  
2007 SEG.pdf

Accesso riservato

: Publisher’s version
Dimensione 794.74 kB
Formato Adobe PDF
794.74 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/264625
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? ND
social impact