WellCAD Basics - Advanced Logic Technology

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126 - BOOK 1 - WELLCAD BASICS www.alt.lu where: ΦRHOB = porosity from density log (pu) RHOma = matrix density (gr/ccm) RHOB = log density (gr/ccm) RHOf = density of pore fluid (gr/ccm) RHOsh = shale density (gr/ccm) Vsh = shale volume which is given through: V sh where: � � � � � � � � 0. 33 2 � � GRlog �GRmin � 2� � � �1 GRmax �GRmin � � � � � GRlog = gamma ray log (observed values) GRmax = maximum gamma ray reading (shale response) GRmin = minimum gamma ray reading (clean formation) The task is best completed in two steps. The shale volume is calculated first and porosity is computed in a second step referring to the Vsh results. Assuming that the Well Logs named GR and RHOB are contained in our Borehole Document the following formula must me typed in to calculate the shale volume: 0.33 * 2^(2*( ({GR}-Min({GR}) / (Max({GR})-Min({GR})) ) ) -1) The functions Min() and Max() as well as the reference to the GR log {GR} can easily be inserted into the formula with a double click on the corresponding item in the Logs respectively Functions list. Enter Vsh as name for the resulting Formula Log into the Log Title box.
Formula for Vsh BOOK 1 - WELLCAD BASICS - 127 Formula Parser Dialog Box with Vsh formula created Click OK to create a new Formula Log named Vsh containing the computed values. Next we compose the formula for the porosity. We assume that RHOf = 1, RHOma=2.71 and RHOsh = 2.65. The following formula must be entered: ( (2.71 – {RHOB}) / (2.71 – 1) ) – {Vsh} * ( (2.71 – 2.65) / (2.71 – 1) ) Note that the formula includes the formerly computed Formula Log Vsh. Name the log PHI and click on OK to create a new Formula Log. Source logs track 1 and 2 and the computed curves in track 4 and 5
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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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BOOK 1 - WELLCAD BASICS - 73 Note:
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Page 87 and 88: 1.4.2 Data Import BOOK 1 - WELLCAD
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Page 93 and 94: List of data channels contained in
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Page 99 and 100: Click to select the channels to imp
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Page 103 and 104: Preview of the embedded configurati
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Page 113 and 114: Switch between header and trailer s
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Page 125 and 126: 1.4.5 Data Export BOOK 1 - WELLCAD
Page 127 and 128: 1.4.5.2 Generating a LAS File BOOK
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Page 131 and 132: 1.4.6.2 Page Setup BOOK 1 - WELLCAD
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Page 155 and 156: 1.5.11 Correcting Data for Borehole
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Page 165 and 166: 1.5.13.3 Drift Correction Spectrum
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Page 169 and 170: 1.5.13.7 Window Based Model BOOK 1
Page 171 and 172: Remarks Tab Model Design Tab Window
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Page 175 and 176: Log containing the measurements (sp
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Page 185 and 186: 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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