Tigress Geology allows geoscientists to model the chrono, litho
and fluid stratigraphy of reservoirs, using multi-well zonation,
correlation and cross-section interpretation. Tigress
Geophysics, Tigress Petrophysics and Tigress
Mapping data can be integrated to accurately model the well and
inter-well areas.
Application hot links with Tigress Petrophysics applications,
Cross Plot, Histogram and Cluster Analysis can be used to define
finer facies and lithology zonations using core and log data. Zone
thicknesses can be generated from the finished zonation and then
passed to Tigress Mapping, along with zone top and bottom depths
for gridding as part of the structural modelling process. Results
of the interpretation are saved to the Tigress Project Data Store for use in the other Tigress
modules.
On this page you can find summaries and feature lists for:
Well correlation and
zonation
Summary
Creation of well stratigraphy and correlation for use in
Tigress Geophysics, Petrophysics and Mapping.
Features
Features include:
- graphical and spreadsheet creation and editing of zone tops and
bottoms for multiple vertical, deviated and horizontal wells
- single level and hierarchical zonation schemes which can
contain repeat zones and gaps
- semi-automatic option of correlation by matching trace
responses in wells
- hot link to Tigress Mapping to select wells for the
display
- user-defined templates to load data quickly.
Data display
The data display includes: log, core, RFT, dipmeter, wellbore
schematic, tests, multiple reference zonations and interpreted
sets. The entire display can be saved as a picture for quick
restoration. And the data display can be in depth and time, with
multiple depth tracks/modes including MD,TVD, TVDSS, TVT, TST, HD.
There is also the option to overlay a second zonation between wells
and option to display markers instead of zones.
Other features
Other features include:
- highly deviated and horizontal wells can be zoned in true
trajectory
- hot link to Cross Section to show effects of zone editing
between wells
- hot link to Crossplot, Histogram and Cluster Analysis to help create lithological
and facies related stratigraphy
- full user control over data display, such as colours,
scales, track and well positions, track widths, grids, data
wrapping and depth increments
- depth marker, cut-off marker, shading, shading by value and
annotation modes
- well alignment on zone top, base, or depth, and spacing by
proportional or user-defined distance
- CGM hardcopy output with user-defined plot header and inclusion
of zonation legend, location map and company logo.
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Cross
section
Summary
Allows the geoscientist to define the inter-well region using
seismic data and interpretations if available.
Features
This integrates the structural and stratigraphic models built in
Tigress Geophysics and Geology to accurately define the
inter-well region. It can be licensed with Seismic Interpretation to allow display and interpretation
of the inter-well region using seismic data.
Features include:
- entire seismic display can be converted from time to depth with
simultaneous time and depth tracks
- lines of section between wells and along well paths are
generated interactively on the basemap.
Data display
It displays:
- multi-wells and data in true trajectory, including horizontal
wells
- log and core traces, wellbore schematics, zonations, RFT,
dipmeter data
- the correlation panel between wells, which can be shaped using
horizons and mapping surfaces and interactively edited
- mapping surfaces with fault intersection markers.
Users have full control over the display, including seismic,
colours, scales, track positions, track widths, grids. There are
opaque and transparent well displays to view the seismic
backdrop.
Other features
Other features include:
- new surfaces and faults can be picked in depth (with or without
a seismic backdrop)
- you can digitise new control points and save them as a mapping
set
- overlay of a second zonation between wells and option to
display markers instead of zones
- hot link with Well
correlation and zonation for quick data loading and automatic
updating of zone edits
- CGM hardcopy output with user-defined plot header and inclusion
of zonation legend.
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Isochore/Isopach
Summary
Calculates isochore (TVT) and isopach (TST) zonal thicknesses
for a well.
Features
Features include:
- Handles vertical and highly deviated wells.
- Calculation is based on deviation survey and dip and azimuth of
each zone top and bottom.
- Zone dip and azimuth can be manually entered or calculated from
a mapping surface.
- Calculation can be applied simultaneously to multiple
wells.
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Crossplot
Summary
Display and crossplot analysis of multi-well data, geophysics
horizons and mapping surfaces for reservoir characterisation.
Features
Features include:
- Data types for display include log and interpreted traces,
conventional and special core data, zone parameters, time/depth
data, structure and attribute maps and horizons.
- Data on display can be filtered by well, zone, cluster,
cut-off, z-plot band prior to analysis.
- Hot link to Well
correlation and zonation, Log plot, other Crossplots and Cluster Analysis for sample
highlighting.
Industry standard pre-defined crossplots (and associated
regression techniques) include:
- Density/Neutron/Sonic
- Hingle/Pickett
- D/N/S/Qv./FRF/K v. porosity
- M/N
- Pef and NGT
- Leverett J/RI/height/depth v. Sw
- Porosity/Rt v. Sigma
- Grain density/porosity v. K
Other features include:
- User-defined crossplots can be generated using any input data
types.
- Zonal parameters are generated from standard analyses and
cut-offs defined in pre-defined plots.
- Normal regression methods include X on Y, Y on X, RMA, forced
and user-defined.
- Chart overlays for density/neutron/sonic crossplots, M-N plots
and NGS plots.
- Complete user control over plot layout, annotation, symbols,
colours, scales, grids and hardcopy.
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Histogram
Summary
Display and histogram analysis of multi-well trace and core
data.
Features
Features include:
- data display by well and/or by zone
- overlay of different data or similar data from different
wells/zones
- full statistical summary including mean, mode, median,
averages
- determination of GR min and max for clay volume
interpretation
- determination of matrix density for porosity
interpretation
- complete user control over plot layout, annotation, symbols,
colours, scales, grids and hardcopy.
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Core depth
matching
Summary
Depth matching core data to log data.
Features
Features include:
- Raw and depth matched core can be aligned with raw or depth
matched log traces.
- Core runs are shifted, stretched, split and flipped
interactively.
- Core porosity compaction corrections can be applied.
- Original core depths are preserved, new depths are saved
separately.
- Core top and bottom markers.
- Display null analysis values as markers on the side of the
track.
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Zonal averaging
Summary
Calculation of zonal averages and net sand/pay from log,
interpreted trace and core data.
Features
Features include:
- averaging of log, interpreted trace and conventional core data,
based upon cut-offs defined graphically or manually
- cut-offs can also be defined in the Crossplot and Parameter Table applications
- calculates arithmetic, geometric and harmonic averages over net
sand, net pay and user-defined areas
- any other trace or core data can be used as discriminator for
net sand/pay identification and data averaging
- option to exclude thin layers of pay or sand from the averaging
process
- definition of new averaged parameters
- multi-well processing of any number of wells
- averaging process is automatically written to the audit
trail.
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Log plot
Summary
Generation of single well plot of raw and interpreted data for
visualisation and hardcopy.
Features
There are two types of automatic plot generation:
- Quick look standard plots (API format) of density/neutron log,
induction log and laterolog log data
- Results plot of fluid saturation, lithology, matrix density and
net sand/pay.
Other features include:
- Comprehensive composite plot for flexible user-defined plotting
of all raw and interpreted trace data, as well as RFT, dipmeter,
zones, core (raw and depth matched) and wellbore schematic.
- All plot types share an extensive range of display features
include trace shading and shading by value, depth markers, cut-off
markers.
- Composite plot has complete user control over plot layout, line
styles and colours, scales, grids, annotation and hardcopy.
- Improved Template functionality to load data based on trace
type, trace name, status, logging tool name, interpreted set
name.
- Alternative trace function for missing data.
- Common Template function between Log plot and Well
correlation and zonation.
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