Borehole Seismic Technology
Select Other "city & date"
Borehole Seismic Technology Course
Introduction:
Borehole Seismic data provides the critical depth and velocity parameters needed to link seismic data with a downhole log and well data.
Borehole seismic tools have evolved from single-component sensors to modern seismic arrays. These modern tools, when combined with the latest technology in seismic source quality, navigational positioning, and computational abilities, can deliver in real-time high-resolution borehole seismic images that extend beyond the wellbore or into the inter-well volume to reduce risk in drilling and development decisions.
Course Objectives:
Borehole Seismic data provides the critical depth and velocity parameters needed to link seismic data with a downhole log and well data.
Borehole seismic tools have evolved from single-component sensors to modern seismic arrays. These modern tools, when combined with the latest technology in seismic source quality, navigational positioning, and computational abilities, can deliver in real-time high-resolution borehole seismic images that extend beyond the wellbore or into the inter-well volume to reduce risk in drilling and development decisions.
Who Should Attend?
Geologists and Geophysicists who need an understanding of the principles, uses, and applications of Borehole Seismic Data
Course Outlines:
Geophysical Principles
The seismic method-seismic response-basic concepts-reflection and refraction-velocity-seismogram -borehole vs surface seismic-types of borehole seismic.
Sources and Tools:
Impulsive Sources (Airguns) - control systems - Non-impulsive sources (Vibros). Borehole seismic tools, classifications, characteristics - CSI and VSI
Check shot Sonic Calibration and Well Tie
Velocities - The Sonic Tool - Sonic Scanner - Checkshot Survey - Drift - Sonic Calibration and Synthetic Seismogram
VSP Processing:
Multiples - Processing Sequence - Stacking, Normalization & Filtering - Up going and Down going Energy - Deconvolution - Corridor Stack
VSP Processing - Anisotropy and AVO
Phase Matching - estimation of Q-Factor - concepts of anisotropy - Thomsen Parameters - AVO calibration - parameters from walkaway and walkaround VSP - parameters from other sources
VSP Imaging
Offset VSP coverage - Data Processing - NMO/CDP mapping - GRT migration - Walkaway VSP coverage - VSP in deviated wells - 2D and 3D VSP
Survey Design and Modeling
Practical and theoretical modeling concerns - basic modeling - ray tracing modeling
Reservoir, Production, and Drilling Applications
Salt proximity surveys - Aplanatic method - Deeplook CS - Time-Lapse BHS surveys - single well survey - seismic while drilling (SWD) - Look-ahead VSP - Borehole Microseismic surveys
Examples
Exercises
