WellCAD Basics - Advanced Logic Technology

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124 - BOOK 1 - WELLCAD BASICS 1.5 Working with Logs The previous chapters discussed how to import data and arrange the log columns to get a printable log chart. We also learned that each log displayed on screen hosts numerical data. This chapter will explain how this data can be used in formulas and processes to derive new data columns. The creation of lithology and stratigraphic columns will be explained as well. 1.5.1 Formula Parser www.alt.lu Text box to compose the formula. Logs available to be used in formula. The Formula Parser enables you to build and manage your own algorithms to correct, compensate or interpret Well Log data. Data from multiple Well Logs can be used in combination with constants and functions to compute new data, which is stored in a so-called Formula Log. The Formula Log is a special kind of Well Log, dynamically recalculated each time the formula or its source data changes. Formulas are saved as part of the Document Template and come up as Formula Log if the template is loaded. To start the Formula Parser click the icon or insert a new Formula Log from the Edit > Insert New Log menu. Functions available to be used in formula. Info box providing short explanations. Formula Parser Dialog Box: Allows creation of own formulas Constants, Operators, Logs and Functions are the key elements a formula is made of.
BOOK 1 - WELLCAD BASICS - 125 Constants A constant is any fixed number, e.g. 1, 3.1415 or –18.5238. Operators Legal operators, in the order of precedence, are: ^ exponent e.g. 2 ^ 3 = 8 / divide e.g. 2 / 3 = 0.666667 * times e.g. 2 * 3 = 6 - minus e.g. 2 – 3 = -1 + plus e.g. 2 + 3 = 5 The operator precedence order may be modified using parenthesis. Logs Well Log or Formula Log data can be referred to into a formula by enclosing their log title exactly as it appears in the log handle in brackets. E.g. {GR} – {Grmin} subtracts data from the log Grmin from the log GR. The Formula Parser provides a special built-in data column referred to by {DEPTH}, which returns the current depth. When a formula is applied to a log the log’s depth sampling rate is used to retrieve the data values and output the result in a Formula Log. If more than one log with different sampling rates are involved, the minimum sample interval will be taken. Functions A list of all functions available is given in Appendix D. While composing a formula a short explanation about syntax and use of the formula is given in the Formula Parser dialog box. The use of the Formula Parser is best explained looking at the simplified example of computing the density-based porosity in a shaly limestone context given by � RHOB � � RHO � � � RHO ma ma � RHOB � � � � �V � RHO � � f � � sh � � RHO � � � RHO ma ma � RHO � RHO sh f ��
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4.4 Book 1 - Basics
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Introduction ......................
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Comment Log .......................
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Introduction INTRODUCTION - I Licen
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INTRODUCTION - III running a Flexne
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Book 1 - WellCAD Basics BOOK 1 - WE
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BOOK 1 - WELLCAD BASICS - 3 The Tit
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1.2.1.1 Reader Module BOOK 1 - WELL
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1.2.3 Draft, Presentation and Print
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1.2.4.1 Switching between documents
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BOOK 1 - WELLCAD BASICS - 11 Usuall
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Display Styles: 1.3.1.3 Depth Colum
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1.3.1.5 Marker Log Display Styles:
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1.3.1.7 CoreDesc Log Display Styles
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1.3.1.9 Strata Log Display Styles:
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Data Format: BOOK 1 - WELLCAD BASIC
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1.3.1.12 Full Wave Sonic Log Descri
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BOOK 1 - WELLCAD BASICS - 25 1.3.1.
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1.3.1.16 Analysis Log Display Style
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1.3.1.18 Structure Log Display Styl
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1.3.1.19 Breakout Log Description:
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1.3.1.21 Engineering Log Descriptio
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1.3.1.23 Polar & Rose Log Descripti
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1.3.1.25 3D Log Display Styles: Des
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BOOK 1 - WELLCAD BASICS - 39 An alt
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1.3.2.3 Naming Logs Right click on
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Tick to enable snap to specified mu
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To display the Document Layout Bar:
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After aligning logs side-by-side In
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BOOK 1 - WELLCAD BASICS - 49 Log wi
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1.3.2.7 Depth Shifting Logs BOOK 1
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1.3.2.9 Extending Logs 1.3.2.10 Cut
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BOOK 1 - WELLCAD BASICS - 55 � Pr
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1.3.2.13 Comparing Log Data - The T
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1.3.2.15 Find and Replace data BOOK
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BOOK 1 - WELLCAD BASICS - 61 Check
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General settings: Check to hide the
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1.3.3.2 Main Settings Background: B
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BOOK 1 - WELLCAD BASICS - 67 Or �
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1.3.3.4 Copy Settings between Logs
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1.4 Basic Document Editing 1.4.1 De
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Page 99 and 100: Click to select the channels to imp
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Interval: Select a log dealing with
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Inserting intervals: After selectin
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To display the Annotation Bar: �
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Begin is where you clicked to draw
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1.6.1.3 Callout Annotation BOOK 1 -
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List of existing layers Click to al
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1.7.1.2 Creating Anchor Points Link
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Common link lines and their effect
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BOOK 1 - WELLCAD BASICS - 191 If yo
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BOOK 1 - WELLCAD BASICS - 193 Tilt
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Select the depth reference that cor
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BOOK 1 - WELLCAD BASICS - 197 Step
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BOOK 1 - WELLCAD BASICS - 199 The m
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BOOK 1 - WELLCAD BASICS - 201 Date/
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BOOK 1 - WELLCAD BASICS - 203 Orien
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BOOK 1 - WELLCAD BASICS - 205 Cross
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1.8.1.2 Chart Settings Chart Title
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1.8.1.4 Depth Range Selection BOOK
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1.8.2.2 Log Overview Axis Settings
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BOOK 1 - WELLCAD BASICS - 213 Highl
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1.8.2.3 Cluster Statistics 1.8.3 Bu
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Creating a Cluster � Move your cu
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1.8.4 Adding Regression 1.8.4.1 Reg
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1.8.4.2 Regression Data Source 1.8.
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BOOK 1 - WELLCAD BASICS - 223 Right
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Annotation Clusters Legend Plot Leg
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Plot Legend BOOK 1 - WELLCAD BASICS
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1.8.5.2 Inserting Annotations BOOK
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Appendix A APPENDIX A - 231 The fol
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Display Styles: Well Log data is al
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APPENDIX A - 235 Scale: The horizon
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Select the presentation style for e
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Classification: APPENDIX A - 239 Cl
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APPENDIX A - 241 Copy: Copies the d
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Mud Log Description: APPENDIX A - 2
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APPENDIX A - 247 polarity positive
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APPENDIX A - 249 correct depth. A c
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Editing Methods: APPENDIX A - 251 T
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Shift by: Performs a constant depth
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APPENDIX A - 255 Mud Log to Litho L
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� Open the Edit > Insert New Log
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APPENDIX A - 259 Position: The dept
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APPENDIX A - 261 Items Count: For e
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APPENDIX A - 263 Cut: Copies the da
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Interval Log Description: APPENDIX
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Classified Bar: Classified Bar styl
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APPENDIX A - 271 In some cases it m
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APPENDIX A - 273 Inserting data:
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Conversion to other log types: APPE
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Comment Log Description: APPENDIX A
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Format: APPENDIX A - 279 From left
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Editing Methods: APPENDIX A - 281 C
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APPENDIX A - 283 The following opti
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APPENDIX A - 285 Defaults can be se
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Inserting a new Marker Log: APPENDI
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Name Dictionary: APPENDIX A - 289 T
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Flying Menu: Settings: Get access t
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CoreDesc Log Description: APPENDIX
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Main Settings: Title: Core Descript
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Background hidden (right) to enhanc
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To re-position the entire interval:
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APPENDIX A - 301 When sorting is pe
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Lithology Log Description: APPENDIX
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APPENDIX A - 305 WellCAD. LTH libra
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Primary: Bed limits and contact lin
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Select a pattern that will be used
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Litho Bar attached to WellCAD Works
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Delete: Removes the log and its dat
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Pattern Dictionary: Lithology Log d
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Display Styles: APPENDIX A - 317 St
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APPENDIX A - 319 Column Settings: T
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APPENDIX A - 321 Left: Strata colum
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Box Style set to Center, Left, Righ
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Inserting Data: Click to insert fre
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APPENDIX A - 327 The following opti
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Stacking Pattern Log Description: A
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APPENDIX A - 331 Title: Enter the t
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APPENDIX A - 333 Changing top and b
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Conversion of stacking pattern inte
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OLE Log Description: APPENDIX A - 3
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Tool Bar and Menu Bar from EXCEL Ne
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Main Settings: Title: OLE Log Setti
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Slice at: Splits the data set into
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Inserting a new FWS Log: APPENDIX A
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APPENDIX A - 347 upper and lower pa
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Default Settings: APPENDIX A - 349
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Inserting a new VSP Log: APPENDIX A
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Editing Methods: APPENDIX A - 353 V
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APPENDIX A - 355 Image Log / Image
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Main Settings: Title: Select the We
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APPENDIX A - 359 The Shifted Curve
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RGB Log Description: APPENDIX A - 3
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Flying Menu: RGB Log Flying Menu AP
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RGB Log to Image Log conversion APP
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APPENDIX A - 369 Line style: Data p
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Style: APPENDIX A - 371 The Analysi
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APPENDIX A - 373 Clicking the Advan
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APPENDIX A - 375 Adjust the depth r
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APPENDIX A - 377 Continue inserting
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Main Settings: Title: Percentage Lo
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Line Style: Line style APPENDIX A -
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APPENDIX A - 385 The Analysis Compo
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Flying Menu: Percentage Log Flying
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APPENDIX A - 389 The default patter
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W S N E APPENDIX A - 391 N E S W N
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Additional Attributes: APPENDIX A -
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Caliper button: Structure Log in Pr
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Tadpole: Structure Tadpole style se
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Editing Methods: APPENDIX A - 399 N
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APPENDIX A - 401 sine wave that wil
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APPENDIX A - 403 Clear Contents: Er
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Breakout Log Description: APPENDIX
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Title: APPENDIX A - 407 Enter the t
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Breakout projection style settings
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To delete a breakout pick: � Sele
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Inserting a new Bio Log: APPENDIX A
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APPENDIX A - 417 Position: You can
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APPENDIX A - 419 When opening the H
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APPENDIX A - 421 Style: If the Disp
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Flying Menu: Bio Log Flying Menu AP
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Engineering Log Description: APPEND
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Display Styles: APPENDIX A - 427 En
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Full, Left and Right display styles
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Drill Item Example of a log with th
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Flying Menu: Engineering Log Flying
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Shading Log Description: APPENDIX A
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Inserting A New 3D Log: APPENDIX A
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Title: APPENDIX A - 441 Enter the t
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Frame: APPENDIX A - 443 If no Frame
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APPENDIX A - 445 Select the log tha
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450 - APPENDIX A www.alt.lu Breakou
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452 - APPENDIX A www.alt.lu Box: Po
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454 - APPENDIX A www.alt.lu Rose Di
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456 - APPENDIX A www.alt.lu Mean Di
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458 - APPENDIX A www.alt.lu For pur
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460 - APPENDIX A www.alt.lu Grid: Y
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462 - APPENDIX A www.alt.lu Rose Az
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464 - APPENDIX A www.alt.lu Concent
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466 - APPENDIX A www.alt.lu Vector
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468 - APPENDIX A www.alt.lu Rose Di
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470 - APPENDIX A www.alt.lu As the
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472 - APPENDIX A www.alt.lu Editing
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474 - APPENDIX A www.alt.lu Fill: A
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476 - APPENDIX A Cross Section Log
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478 - APPENDIX A www.alt.lu Data dr
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480 - APPENDIX A www.alt.lu extensi
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482 - APPENDIX A www.alt.lu � Cli
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484 - APPENDIX A www.alt.lu Default
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486 - APPENDIX B Tool Bar www.alt.l
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488 - APPENDIX B www.alt.lu Toggle
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490 - APPENDIX B Pen Bar www.alt.lu
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492 - APPENDIX B Document Layout Ba
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Appendix C Listed are all functions
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Power( A, P ) Returns argument (A)
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Index 3 3D Log · 37, 438 3D Log Ma
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Deleting Logs · 39 Depth Axis · 7
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Marker position · 148 Mask horizon
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Structure Log Editing · 399 Struct
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WellCAD Basics - Advanced Logic Technology

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