Data preparation is first step in any data based analysis. However, before we discuss about data preparation -it is important to list out the data requirement for Wellbore stability analysis. Below is the list of data requirement:
Planned Well
• Planned well Location
• Planned well TD
• Planned well trajectory
• Litho column/Formation Tops prognosis
Field
• Field Layout
• Full Field Review Report
• Field Development Plan
Seismic
• 3D Seismic data required covering the available wells (offset/planned well) with the planned well location.
Migration velocity & Stacking velocity (in ASCII format)
Final stack data (SEGY) along with interpreted horizons (ASCII)
Check shot/VSP data at offset well. VSP Corridor stack, if available.
Geology
• Geological Report
• Geological Cross-Sectional Map
• Image Interpretation Reports
• Formation Tops
• Stratigraphic Column
• Structural Map
• Geology Related Reports/Papers
Drilling
• Daily Drilling Report
• End of well report (Well completion Report)
• Master Log
• Deviation Survey
• Stress Measurements (XLOT/LOT/FIT, Mini-Frac)
• Casing and Cementing Diagram
• Real-Time Drilling Measurements (ECD, ROP, Hook Load, Pump Rate, Pump Pressure and Torque)
• Cavings, Cuttings or Caving Pictures
Logs (Wireline and LWD)
• Sonic Data (DTC and DTS)
• Electrical Image Data
• Openhole Logs (RHOB, GR, CALIPER, NPHI, Resistivity or Induction logs)
• Petrophysical Logs (Volumes, PHIT,PHIE, Saturations)
• Check Shot/VSP data
• Formation pressures, Drill Stem Test
Reservoir
• Reservoir Pressure
• Well Test Data
Core
• Core Data (UCS, Friction Angle, Poisson's ratio, Young's Modulus, Porosity, Density, petrography)
In case all the listed data is not available then Geoscientists from ShilazTech will use informations, relations from representative published results.
Link to previous discussion on this subject
Wellbore Stability Analysis.
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