Transcript No Slide Title

UNIRAS USER GROUP 1999
Using Toolmaster/AGX in
Seismic Oil Exploration
Stuart Merrylees
ROBERTSON RESEARCH INTERNATIONAL
GEOPHYSICS DIVISION
Swanley, KENT
Email [email protected]
Tel
01322 668011
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OUR BUSINESS...
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We process seismic reflection data to explore
for oil and gas.
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Contracts won by competitive tender
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terabytes of data
standard and proprietary algorithms
lots of computing
and lots of graphics
Develop software
 2 million lines of Fortran and C….
INPUT DATA
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Raw seismic signals on magnetic tape
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Coordinates and maps of survey location
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Well data, historic data, in any format….
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Client’s objectives for this survey
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Our own expertise and historic knowldege
• QC of seismic acquisition
• Interactive tools to explore data
• Hardcopy with lots of
annotation.
DELIVERABLES
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QC plots of experimental diagnostics.
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SEISMIC SECTIONS on paper and film
 very high quality plot - complex annotation
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Magnetic tape of final digital data.
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CGM files on CD ROM
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Written report with illustrations
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various Microsoft files...
OUR TOOLS….
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UNISEIS - Proprietary software
 Fortran, C, X, Motif, awk, perl, xmgr
 Metrica UNIX database
UNIRAS AGX and Widgets, AVS Express
C tree from FAIRCOM
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PROMAX interactive seismic processing
creates CGM with SDI
favours SDI or ZEH interpreters
Geoqube matching
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OUR HARDWARE
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HP
HPUX 10.20 and HPUX 11.0
PA RISC 2.0
PA RISC 2.0
PA RISC 1.0
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IBM RS6000
N class (8 x PA8500)
J class, K class
735
AIX 4.3, AIX 4.2, AIX 3.2.5
F50 (4 CPU)
390, 390, 580, 530
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Raid, Tapes - 3480, 3490, 3590, DLT, DAT
DISPLAY DEVICES
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OYO Thermal plotters, 24/36 in 200/400 dpi
Versatec interface (CGM, or RDB metafiles).
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HP 650C Design Jet Colour plotter - HPRTL
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Xerox B/W paper plotter - HPRTL
LASERDOT Film plotter. 42in 800dpi raster
OCE Scanner/Film Plotter - HPRTL
Postscript printers, A3 and A4.
X terminals 1280 x 1024 resolution.
Microsoft exchange - tif and gif, etc.
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WHY WE CHOSE AGX
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AGX Toolmaster, Widgets and UIM/X
Purchased 1992, after comparative benchmarks.
 Licenses: development and 12 run-time.
Versatile - seismic, contours, 3D, widgets.
Lots of hardcopy devices; configurable.
Authorities on CGM - committee members.
Uses UIM/X GUI builder.
Available on all our favourite UNIX platforms.
Well documented. Good UK support.
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OUR APPLICATIONS
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4 developed with UIM/X GUI builder
8 batch (or command-line) applications
3 applications written in pure X and Motif
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DESIGN CRITERIA...
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Write as few applications as possible !
 Can it interact with, or complement, other tools ?
Interactive and batch modes of operation
How will it read ( write ? ) its data ?
Will it be fast enough ?
Hardcopy - scaling options - more annotation.
MPL Toolkit
Fortran program
Read data traces
Write to socket
TUX and AGX
C executable.
Plots traces and
starts analyses.
Write to socket
TUX and AGX
C executable.
Spectral Analysis
WHICH AGX RELEASE ?
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AGX Releases…
6v5a is our current production release.
 Plus some special fixes.
Some applications still need to use 6v3b or 6v4a.
7v0 - creates more portable CGM format
 but new bugs (and no fixes) - not generally usable
7v1 - we were a BETA test site
 we think it failed.
Research programmer
created diagnostic of 150
identical
traces, to test an
algorithm.
He saw strange effects he
did not expect.
He plotted the original
data and got a surprise...
The
original
data
Adding noise here ...
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changes data
character here
Problem may
disappear when
you zoom ...
Can you trust
your tools ?
GRIDPLOT
Map of
velocity
of
sound over
seismic
structure in
3D survey.
One of many
slices of data
on a
rectangular
grid.
GRIDPLOT PROGRAM
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Display any XY grid with various Z attributes.
 Signal/Noise level in raw recordings
 3D binning maps, Line intersection/Navigation QC.
 Seismic velocity maps, Timeslices from 3D cube.
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Define COMPACT data format:
 binary data with ascii descriptor headers.
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AGX GRIDS and CONTOURS
 Menus to control scaling, colours, contour levels
 Options to combine Z attributes, ZOOM, ROTATE
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HARDCOPY - Postscript, CGM, HPTRL, etc
CGM - a picture-archive format
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Extensions CGM+, CGM-PIP supported in AGX manuals but not by AGX code.
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CGM allows mixed integer precision 16, 24, 32, 64 bit
Floats can be IEEE, or hybrid formats - leads to chaos.
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Not complete, eg font name but no font description.
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CGM is not really device independent.
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Other vendor’s CGM generators and interpreters may paint
different pictures - or no picture at all !
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AGX Profile system intended to correct for these deficiencies
but parameters are all trial and error.
CGM - where next ?
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agX/CGM Users Guide, 6v4a, 1994.
An excellent manual and tutorial.
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Oil industry (POSC) has defined reasonable subset of CGM
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UNIRAS had 90% of an excellent product and has let it drift
away - has it lost interest ?
 Profile keywords have new names and new parameters.
 VDCTYPE (real, integer)
 SEISMIC_EXTENSIONS (none, cgm_plus, cgm_pip)
 MCGM_RESOLUTION ( npixel)
 INTPREC_BIN (16, 24, 32)
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Suggest: conform to PIP definition, with one simple keyword.
Suggest: add HERSHEY to available fonts
NEW RELEASES
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New Release arrives...
 Not a lot of new features in Release Notes, but…
… they never tell us what has changed....
 Recompile and test all our applications
Try to debug things that fail….
 Go back to original /examples/agx/ source code to try to
replicate problem.
Takes some effort - wait for response
May never succeed - no debug tools - we are stuck.
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AVS Website still says 7v0 is current release ?
Maintenance experiences
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SEISPLOT bugs February 1997
 Robertson demonstrated problems in 6v4a/6v5a.
 applications crashed; plots distorted and irregular.
 fixes for 6v5a provided - but not in next release !
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CGM format incompatible with other vendors.
 Partly resolved by using 7v0 for CGM creation.
 But it still crashes.
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7v0 release had several new bugs.
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7v1 release had more new bugs.
OUR WISH LIST
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Provide test programs which exercise all the
features in all the AGX routines.
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Always put fixes into next release.
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Re-establish support for CGM.
Document UNIRAS.PRF profiles.
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Update Website. Offer online documentation.
Dispense with shareable object libraries.
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Support latest HP architecture and OS.
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Supply UIM/X license instead of TUX license.