What are LIS, DLIS and RP66?
Jan Just (JJ) Keijser
Does anyone know what the above mentioned file types are?
Sincerely
Justin Chaffey
Richard Bligh
The Log Information Standard (LIS) was developed by Schlumberger
in 1974 to provide a standard method of recording well log data.
Recommended Digital Log Interchange Standard (DLIS), Version 1.00
was produced by the API in May, 1991, and is also known as API
Recommended Practice 66 (RP 66). This format is intended to allow
for the representation of a wide variety of data, including well
log data.
richard
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Richard Bligh
Phone: 512 331-3123 Schlumberger Austin Products Center
Fax 512 331-3059 PO Box 200015
bl...@austin.asc.slb.com Austin, TX 78720-0015
John Bobbitt
>
> Hi.
> Does anyone know what the above mentioned file types are?
> Sincerely
exchanging well log traces. In order to be more self-defining, the API
D-9 subcommittee developed:
DLIS. This is a self-defining file. It is based strongly on an internal
format developed by Schlumberger (therefore, software exists to read
it). DLIS encapsulated a lot of "objects", some of which were general,
and some of which were peculiar to well logs.
When DLIS was published, it became an API Recommended Standard 66 (ie.
RP66).
Various groups noted that RP66 was useful outside of just well logging.
So they met with the DLIS group in an attempt to generalize the
standard. The group therefore came out with an version 2 of RP66 that
can be generally used (they also separated the well log specific objects
for use by well loggers).
So now RP66 is a general format which can be used by other disciplines.
It has the advantage over other general formats in that it is very
efficient for large data arrays (order of hundreds of megabytes into 10s
of gigabytes). I.e., it is useful for well logs and seismic.
By the way, the SEG is in the process of adopting RP66 and the POSC data
model above it as a seismic data exchange format. (SEGDEF)
John Bobbitt