Introducing CycloLog 3'0

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Introducing CycloLog 3.0
A powerful log interpretation tool for petroleum
geologists
A BRIEF INTERACTIVE TOUR
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Navigation

• You can use the contents slide to navigate to a
  subject of your interest
• Use the left mouse button or the space bar to
  proceed to the next slide
• Click on the logo in the lower right corner to go
  to the contents slide
• Use the ESC key to quit the presentation

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Contents
Importing data Exporting data The CycloLog
desktop Using histograms to analyse data Defining
stratigraphic boundaries Log display
functions Spectral analytic functions Well-to-seis
mic ties Clustering and electrofacies
analysis Conversion from depth to time
domain Example of CycloLog in action
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Importing data
IMPORT LOG DATA QUICKLY AND EASILY FROM EITHER OF
TWO FORMATS
LAS ASCII
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Importing Data

• CycloLog supports two file formats
• General ASCII format
• LAS files
• Data import from these formats is automated,
  using wizards

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Importing Data

• Select the required logs
• Modify the default settings if required
• Select interval
• Select units (m or ft)
• Rename well
• Define the log order
• Check and edit the data NULL and other values
  can be replaced
• Convert MD to TVD if a deviation survey is
  available

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Exporting data
USE CYCLOLOGS EASY DATA EXPORT TO ENABLE
COMMUNICATION WITH YOUR WORKSTATION
COMMUNICATION WITH YOUR WORKSTATION, GRAPHICS
PACKAGE, OR ANY OTHER SYSTEM, IS ENABLED THROUGH
CYCLOLOGS EFFICIENT EXPORT OF ALL ANALYSED DATA
AND ON-SCREEN GRAPHICS
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Exporting Data

• User-friendly export of the logs in LAS or
  general ASCII file format by selecting the logs
  from a list
• Export graphics as GIF, JPG, TIFF, PNG or Bitmap,
  for inclusion in reports and presentations

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The CycloLog desktop
ENJOY A USER-FRIENDLY ENVIRONMENT DESIGNED TO
MEET THE NEEDS OF THE PETROLEUM GEOLOGIST
EASY HANDLING AND DISPLAY OF ALL LOG TRACES
ALLOWS A RAPID OVERVIEW OF YOUR WELL DATA
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CycloLog Desktop

• New intuitive and adjustable menu structure
• Toolbar buttons for quickly changing the pane
  layout
• Maximize the data window by sliding the working
  boxes into the sides of the data window

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CycloLog Desktop

• CycloLog gives you maximum control over the
  appearance of the traces
• In one click you can change
• the wiggle thickness
• the wiggle style
• the wiggle colour

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CycloLog Desktop

• Control individually the appearance of each data
  pane
• Use different layout styles
• mirror image
• log colour bar coding
• pseudo seismic section
• column colour
• Turn the depthbar on or off
• Display an overlay grid

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Using histograms
MAKE A RAPID EVALUATION OF THE LOG DATA
POPULATION DISTRIBUTION
USING HISTOGRAMS FOR THE SCALING OF YOUR LOG DATA
OR TO DETERMINE POTENTIAL RESERVOIR PROPERTIES
THROUGH INTERACTIVE CUT-OFF
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Using histograms

• With the histogram window you can
• Define minimum and maximum values for optimal log
  display
• Recognize different populations in the data
• Define a cut-off value for netgross calculations

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Defining boundaries
MAKE PICKS OF STRATIGRAPHIC BOUNDARIES ON-SCREEN
AND INTERACTIVELY
DEFINE AND LABEL STRATIGRAPHIC, SEDIMENTOLOGIC OR
PETROLEUM GEOLOGICAL BOUNDARIES
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Boundaries

• Stratigraphic boundaries can be picked
  interactively by clicking in the log data pane
• Boundary types can be differentiated by using
  different colours, thicknesses and styles

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Boundaries

• Boundary properties can be edited on-screen
• The label for each boundary can be individually
  aligned
• Sets of boundaries for different stratigraphic
  schemes can be saved separately

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Log display functions
USE A RANGE OF DISPLAY FUNCTIONS TO ENHANCE THE
LOG TRACE IMAGES
MODIFYING THE LOG TRACE PATTERNS AND APPLYING
COLOURS IN VARIOUS WAYS TO AID PETROLEUM
GEOLOGICAL INTERPRETATION
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Basic Log Processing

• Basic filters
• median filter
• average filter
• edge enhancement filter
• Calculations
• Add, subtract, multiply and divide logs
• Derivative and integral
• Logarithm and exponent

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Basic Log Processing

• Colour-fill a log according to its value
• Use the values in one log to define the colour
  fill of another log
• False Colour display
• Use the colour cube for creating logs and use the
  calculated logs for colouring other logs

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Spectral functions
TAKE A LOOK AT YOUR LOG DATA IN ANOTHER DIMENSION
- USING THE FREQUENCY DOMAIN
ADVANCED (SPECTRAL) LOG ANALYSIS
PREDICT CLIMATE RELATED CYCLES DETERMINE THE
CYCLE HIERARCHY PICK KEY BOUNDING SURFACES MAKE
NEAR-SYNCHONOUS CORRELATIONS
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Spectral Analysis

• CycloLog offers a total of five different methods
  of spectral analysis
• Calculation of the spectrum is extremely fast
• Results can be used immediately for stratigraphic
  interpretation

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Spectrum Display

• The spectral images are displayed in their own
  pane
• The spectral display cursor provides information
  on wavelengths, accumulation rates and
  Milankovitch cycles

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Amplitude Spectrum

• Use the average amplitude spectrum window to
  display the spectrum at the chosen depth
• Assess the relative importance of different cycle
  wavelengths

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INPEFA Analysis

• INPEFA is a unique and powerful method of
  analysis, revealing spectral trends in logs
• The turning points of the INPEFA curve represent
  significant changes in depositional environment,
  such as floodings and erosion surfaces
• INPEFA analysis, using cyclostratigraphic
  principles, allows recognition of
  near-synchronous stratigraphic subdivisions and
  correlations

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Well-seismic ties
USE CYCLOLOG TO ESTABLISH THE LINK TO YOUR
SEISMIC DATA
INTERACTIVELY CREATE REFLECTIVITY AND ACOUSTIC
IMPEDANCE CURVES CREATE SEISMIC SYNTHETICS
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Seismic Synthetics

• With a few clicks a seismic synthetic can be
  calculated, using the mathematical operations
  available in CycloLog
• First calculate the acoustic impedance
• From the acoustic impedance the reflectivity is
  calculated
• By entering a seismic wavelength the seismic
  synthetic is then calculated and displayed for
  comparison with the other logs

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Cluster analysis
DISPLAY ELECTROFACIES PATTERNS TO SUPPORT YOUR
WELL ZONATION AND PETROLEUM GEOLOGICAL EVALUATION
VIEW AND CLASSIFY YOUR CLUSTERS IN A 2D OR 3D
CROSS PLOT
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Clustering

• Two different methods of cluster analysis can be
  used for identifying the distinct electrofacies
  within the logged section
• Results of cluster analysis can be displayed
  separately or used to colour-fill any other log

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Cross-plotting

• Generate 2-D and 3-D cross-plots to support the
  cluster analysis
• Save 2-D cross-plots in a variety of graphical
  formats

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Domain conversion
CONVERT THE WELL FROM THE DEPTH DOMAIN INTO THE
SEISMIC (TWT) OR RELATIVE GEOLOGIC TIME DOMAIN
DISPLAYING A WELL IN THE TWT DOMAIN FACILITATES
DIRECT COMPARISON WITH SEISMIC
DISPLAY A WELL IN THE RELATIVE GEOLOGIC TIME
DOMAIN FOR COMPARISON WITH CHRONOSTRATIGRAPHIC
CHARTS
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Domain Conversion

• Converting the depth scale to seismic (TWT) time
  gives you a unique way of displaying the same
  logs in both depth and seismic time next to each
  other
• When spectral analysis has been used to establish
  a time-scale, the logs can be converted to
  (relative) geological time

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Finally, an example
SEE HOW ON-SCREEN LOG INTERPRETATION IS MADE
EASIER AND FASTER USING CYCLOLOG
USING CYCLOLOGS DISPLAY FUNCTIONS, AND ITS
TOOLBOX OF ADVANCED ANALYTICAL METHODS, REVEALS
PREVIOUSLY HIDDEN INFORMATION
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Conventional Log Display

• Conventional display of
• GR (track 1, scale 0-150 API)
• Sonic (track 2, 90-40 µs/ft)
• Note that the GR log lacks character when
  displayed in the conventional way
• Recognising stratigraphic subdivisions in such a
  well can be difficult

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Improving Conventional Log Display

• Add a mirror image display of the GR log (track
  3)
• Re-scale the GR log with reference to the
  histogram, and colour it with values from the
  same log (track 4)

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Advanced Log Analysis

• Now add the INPEFA transform of the GR log, to
  show the trends revealed by spectral analysis
• See how INPEFA adds character to a previously
  featureless curve

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Adding picked breaks

• Use cyclostratigraphic principles to subdivide
  the section
• Display the picked stratigraphic boundaries
• Create a report-standard composite well plot for
  printing or exporting

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AN EXAMPLE OF A NEAR-SYNCHRONOUS STRATIGRAPHIC
CORRELATION
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Thank you!
ENRES International solutions in petroleum
geoscience
CYCLOLOG 3.0 IS AVAILABLE FOR LICENCE WE ALSO
OFFER A CYCLOLOG ANALYSIS SERVICE PLEASE CONTACT
US FOR MORE INFORMATION info_at_enres.nl www.enres.
nl