[OpendTect_Users] OpendTect Training
Friso Brouwer
friso.brouwer at dgbes.com
Mon Feb 6 18:31:59 CET 2012
Dear Antonio,
Yes we organize beginners courses, to give you and the others in the user
group a overview of what is available:
- Our Netherlands office offers longer courses in The Netherlands and
other European locations.
- More in the line of what you are requesting (and geographically
closer): in our Houston office we offer once a month the "Introduction to
OpendTect" course, which is specifically aimed at starters, and covers the
GPL part of OpendTect.
- The "Introduction in OpendTect" course is also provided by our agents
in Buenos Aires (Argentina) and Calgary (Canada) and in conjunction with
major conferences, such as the SEG annual meeting.
- Antonio, finally we do organize customized trainings at any location,
if you are interested in that, please send us an email to
support-americas at dgbes.com .
For more information on training, please visit
http://dgbes.com/index.php/consultancy-a-training.html
Cheers,
Friso
On Sun, Feb 5, 2012 at 11:32 AM, Antonio Klein <ahfklein at gmail.com> wrote:
> Dear Collegueas
> I would like to know if there is a course to beeginner in the Opendtect in
> this year and if do you have any plan to do may be in Brazil. In southern
> Brazil (Florianopolis, SC).
> Cheers
> Antonio
>
>
>
>
> 2012/2/4 Bert Bril <Bert.Bril at opendtect.org>
>
>> Hi all,
>>
>>
>> Juan wrote:
>>
>> > In my opinion, the problem that Guillaume has discovered and the issue
>> > with the trace numbering that you described is extremely interesting for
>> > me.
>> >
>> > This is the kind of problems that one (I at least) would like to read
>> and
>> > that often, sooner or later, one is confronted with. A couple of years
>> ago
>> > I faced a similar problem because the headers were incorrectly filled.
>> > After correcting the headers all problems disappeared.
>>
>> I can say the following about this problem: Try using the development
>> release 4.3. You will find it has a nice display of your header field
>> values. In the graph you can easily see whether there are strange
>> numbers, duplicates, and so forth. You can then choose a nice continuous
>> number as identification (the 'Trace number' is what we call this
>> identification number in OpendTect). Usually the CDP number is used,
>> sometimes a SP number will be OK. Constraints are:
>>
>> 1) The number must continuously go up - or continuously down
>> 2) The trace numbers can have a step different from 1, and that step
>> doesn't even have to be constant. It is supposed to be proportional to
>> the distance along the line, however.
>> 3) Very damaging are trace numbers that duplicate, jump the wrong way or
>> otherwise violate above rules. Then you'll get trouble.
>>
>> In all cases, be sure about what header value you use as trace number.
>> Examine a large number or all of the traces, to do that click on the
>> field in the table. Investigate discontinuities. Every point that is
>> drawn is a potential discontinuity. I've sketched a few typical patterns
>> below.
>>
>>
>> What to do if you can't find a good trace number in the headers? Then
>> make one! Also in 4.3 is the new 'Manipulate' button. You can create a
>> new SEG-Y file from the old one with new, calculated header values. This
>> works similar to the Mathematics attribute, just define some kind of
>> formula using the other header values. A special case is 'INDEXNR' which
>> is the sequence number of the trace in the file. A formula like:
>>
>> INDEXNR * 2 + 99
>>
>> will result in values 101 103 105 ...
>>
>> The result is immediately displayed, so you can check whether the new
>> value is as you would expect it.
>>
>>
>> Note that this new functionality will also be in the coming stable 4.4
>> release (expected around the EAGE conference).
>>
>>
>>
>> Typical patterns (put your e-mail viewer in a fixed-width font):
>>
>> o
>> .
>> .
>> .
>> .
>> .
>> .
>> .
>> o
>>
>> or
>>
>> o
>> .
>> .
>> o
>> o
>> .
>> .
>> .
>> o
>>
>> Good trace numbers for 2D lines. The 2nd one has one missing trace
>> number, which is OK when that's exactly what's the case: a gap.
>>
>> o
>> .
>> .
>> o .
>> . o
>> .
>> .
>> o
>>
>> A reversal. Not OK. Typically you are using the SP number in a line
>> that's not re-sorted.
>>
>> oo
>> oo
>> oo
>> oo
>> oo
>> oo
>> oo
>>
>> Duplicate traces. Only the first one of each trace pair will be loaded,
>> because OpendTect must make sure that every trace number is unique.
>>
>> o........o
>> o.....o
>> o....o
>>
>> or
>>
>> o.....o
>> o.....o
>> o.....o
>>
>> These patterns are typical for the inline number of a 3D survey.
>>
>>
>> o o o
>> . . .
>> . . .
>> . . .
>> . . .
>> o o o
>>
>> ... and this one the crossline number of a 3D survey. Also, for
>> pre-stack data this happens for offsets for each gather.
>>
>>
>> o...o o
>> o...o o.o o...o o..
>> o....o
>>
>> Typical for some kind of gain value. Not useful as trace number.
>>
>>
>>
>>
>> Bert
>>
>> --
>> -- Bert Bril / OpendTect developer at dGB
>> -- mailto:Bert.Bril at opendtect.org , http://opendtect.org
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at opendtect.org
>> http://lists.opendtect.org/mailman/listinfo/users
>>
>
>
>
> --
> Antonio Henrique da F. Klein, Dr
> Prof. Adjunto I (Oceanografia Geológica)
>
> Universidade Federal de Santa Catarina
> Centro de Filosofia e Ciências Humanas
> Departamento de Geociências
> Laboratório de Oceanografia Costeira
>
> Campus Universitário - Trindade
> Florianópolis, SC - 88040-900
> Brasil
>
> Fone: VOIP 48 3721 4112
>
>
> _______________________________________________
> Users mailing list
> Users at opendtect.org
> http://lists.opendtect.org/mailman/listinfo/users
>
>
--
Friso Brouwer
COO-Americas
dGB Earth Sciences
+1 281 240 3939 (o)
+1 281 240 3944 (f)
friso.brouwer at dgbes.com
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