Consiglio Nazionale delle Ricerche

Tipo di prodottoContributo in atti di convegno
TitoloCompression of downhole data
Anno di pubblicazione1999
  • Elettronico
  • Cartaceo
Autore/iG. Bernasconi, V. Rampa, F. Abramo, L. Bertelli
Affiliazioni autoriDipartimento di Elettronica e Informazione, Politecnico di Milano, L. da Vinci, 32, 20133 Milano; CSTS-CNR, c/o Dipartimento di Elettronica e Informazione, L. da Vinci, 32, 20133 Milano; AGIP-ENI
Autori CNR e affiliazioni
  • inglese
AbstractMeasurement-While-Drilling (MWD) services efficiently support drilling decisions, therefore these tools are becoming a de-facto standard on well sites. Currently, the main drawback of MWD equipment is the absence of a high bit-rate telemetry system to enable real-time activities. This problem may be solved by employing either an off-line solution, with limited memory capacity up to few hundreds of Mbytes; or an on-line solution with telemetry at a very low bit-rate (tens of bits/sec). However, following the off-line approach with standard acquisition parameters, the internal storage memory would be filled up in just a few hours at high acquisition rates. On the contrary, with the on-line solution only a small portion of the acquired signals (or only alarm information about potentially dangerous events) can be transmitted in real-time to the surface by using mud-pulse telemetry. In this paper, we present a lossy data compression algorithm based on the wavelet transform (WT), which is suitable for downhole implementation and may be successfully applied to both on-line and off-line solutions. Numerical tests based on real field data achieve compression ratios up to 15:1 without noticeable signal degradation. This allows a significant increase in downhole time acquisition and in real-time information that can be transmitted through mud-pulse telemetry.
Lingua abstractinglese
Altro abstract-
Lingua altro abstract-
Pagine da351
Pagine a359
Pagine totali9
Numero volume della rivista-
Titolo del volumeProceedings of the SPE/IADC Drilling Conference 1999
Numero volume della serie/collana-
Curatore/i del volume-
Verificato da refereeSì: Internazionale
Stato della pubblicazione-
Indicizzazione (in banche dati controllate)-
Parole chiaveDrilling, MWD method, Wavelet transformation, Data compression, Drill bit, Burr, Data analysis
Link (URL, URI)
Titolo convegno/congressoSPE/IADC Drilling Conference 1999
Luogo convegno/congressoAmsterdam
Data/e convegno/congressoMarch 1999
Titolo parallelo-
Note/Altre informazioni-
Strutture CNR
  • IEIIT — Istituto di elettronica e di ingegneria dell'informazione e delle telecomunicazioni
Moduli CNR
    Progetti Europei-
    • Compression of downhole data
      Descrizione: Published paper