Essentials of Rock Physics and Seismic Amplitude Interpretation

28th - 30th September and 5th - 7th October, 2.00 pm to 5.00 pm KL (Malaysia) time
6 day virtual course: This highly acclaimed course is a must for all geoscientists wanting to understand rock physics principles, their application to amplitude interpretation (including AVO reflectivity and elastic inversion products) and how they can be applied to assess drilling risk. Dr Rob Simm of Rock Physics Associates Ltd has granted Ikon Science the rights to deliver this course by our approved instructors.
Show Course Outline
Introduction
The potential of seismic amplitude interpretation for hydrocarbon detection, seismic amplitude and risk.
Fundamentals
Seismic basics, approach to seismic modeling, elastic parameters, modeling reflectivity, relating seismic data to models, simple models vs. practical complexities.
Rock Properties and AVO
AVO response description, rock property controls on AVO.
Rock Physics, AVO and Seismic Interpretation
Seismic interpretation of different AVO scenarios with practical examples.
Characteristics of Seismic Wavelets
Seismic bandwidth, wavelet shape and descriptions of phase, zero phasing, enhancing frequency content, broadband vs conventional streamer.
Resolution
Temporal resolution, principles of net thickness estimation, resolution vs detection (sections and maps).
Well Ties
The well tie process, log calibration, the importance of wavelet shape, problems with assuming phase and timing, well seismic matching (White’s) and the ‘adaptive’ techniques.
Deriving Inputs for Seismic Models
A perspective on practical rock physics and rock physics models utilizing log data, log editing, the inputs for Gassmann’s equation and fluid substitution, examples of different rock physics models and the concept of lithology substitution.
AVO Analysis
2 term conventional AVO and the use of data projections (near far/ Intercept gradient), data requirements for successful AVO analysis, seismic processing issues, AVO in the reflectivity and impedance domains.
Rock Properties from Seismic (Inversion)
Simple net pay estimation using bandlimited impedance, calibration and uncertainty, deterministic elastic inversion to angle independent properties such as AI, SI and density using model based and sparse spike techniques, the Ji-Fi approach (introducing facies into the inversion methodology), probabilistic forward modeling and matching techniques such as ODiSI.
Issues in Applying Rock Physics in Prospect Evaluation
A review of seismic amplitudes within the risking context, the potential for bias and the need for understanding base rates, different approaches for combining amplitude information into prospect risk.
Exercises
  • Creating models of various AVO scenarios
  • Net thickness prediction in thin beds
  • Well tie using RokDoc (White and Adaptive methods)
  • Fluid substitution on logs and AVO modeling
  • Appreciating the amplitude scaling problem
  • Understanding AVO projections
  • AVO in the impedance domain
  • Reflectivity and bandlimited impedance
  • Simple net pay analysis
  • The low frequency problem in inversion
  • The role of the AVO gradient in determining Vs from P-wave seismic
  • Risking case study
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