This is a case report of communited tibial shaft fracture following an alleged motor vehicle accident. The discussion will focus on the nature and classification of tibial fracture and its treatmen...
QC and Use Fracture Attribute Data Overview Use of Imported fracture attributes Add and Edit well attributes – Derived attributes (Dip/Azimuth)
Create and use Stereonets – Display various attributes – Analyze Fracture Sets
Interactive Filters – Create – Use actively filter to assign new Fracture Sets
Visualize Fractures in 3D using filters
QC and Use Fracture Attribute Data The use of Imported Fracture attributes Imported attributes Fracture attributes can be analysed and then imported into Petrel.
Use of attributes: - Display (3D / Well Section) - Analyze in Stereonet - Generate new attributes
QC and Use Fracture Attribute Data Structural Dip removal – 1. Investigate Analyze data in Stereonet Stereonet will automatically plot the dip and azimuth values from the fracture points
Investigate structural Dip Investigate fracture dips relative to a structural surface / 3D grid. Rotate back the dip angle and dip azimuth
QC and Use Fracture Attribute Data Structural Dip removal – 2. Generate new Dip/Azimuth Attributes Remove structural Dip New Fracture attributes can be generated in Petrel: Right-click on Attributes folder, ’Insert new attribute’. Select ’Derived’ attribute.
Select ’Dip and azimuth’ and drop in the Surface or a 3D grid
Relative Creates new Dip angle and Dip azimuth relative to surface or 3D Grid based on the existing dip/azimuth
Before Rotation
QC and Use Fracture Attribute Data Structural Dip removal – 3. Display the rotated data in Stereonet Stereonet display Switch between original Dip/Azimuth and pre-deformation Dip/Azimuth Before Rotation
After Rotation
Current visual space Original Dip and azimuth (italic); can be changed to new attributes (regular) by a right-click option.
QC and Use Fracture Attribute Data Fracture Sets – Identify Fracture sets must be separated out so they can be modeled with individual parameters. These can be seen from FMI images depending on how they behave, their orientation and dip.
FMI Image Dynamic Normalization
Open Fracture Cemented Fracture Enhanced Fracture
FMI Image Static Normalization
Induced Fracture
Cross Bedding Bedding 0 Hole Azimuth2
True Dip (deg)
0 0
Conjugate Fractures
Open Fractures Strike stereogram
Deviation 12 GR
15
QC and Use Fracture Attribute Data Create Fracture Sets – Alt. 1: Calculator Make new Fracture set using filter selection
Update the Fracture Set with a new set
QC and Use Fracture Attribute Data Create Fracture Sets – Alt. 2: Discrete Filter Assignment Make new Fracture sets using Filter assignment 1. Insert a new Discrete attribute. 2. Rename and use ’Fracture set’ as Template.
3. Right-click the new Frac set attribute and select Create filter from the drop-down menu. 4. Draw a selection in the Stereonet using ’Freehand draw’. 5. Right-click the created filter folder and select Assign a new value to the filtered points. 6. Display the Frac set Filter as attribute in the Stereonet, and use the toggles to filter away data.
QC and Use Fracture Attribute Data Fracture Sets – Display in 3D 3D display Using Fracture set as color
Stereonet display Fracture set filter selection
3D display (filter) Fracture set filter selection applied
QC and Use Fracture Attribute Data Rose Diagrams as Log signatures Rose diagrams on maps Rose diagrams can be displayed on maps to get an idea of lateral variation of Dip or Strike of fracture points. A well section has to be created first, then the related Well section template should be displayed as Log signature on a map.
1. Well section template Set up a well section template using only Rose diagrams.
QC and Use Fracture Attribute Data Log signatures on Maps 2. Wells > Settings In the Log signatures tab related to the wells folder, chose the correct Template and set parameters.
3. Display Map Dispaly a Map window with wells using log signatures.
