Petro-Ed

presents

NEW SEISMIC METHODS:
INTEGRATED ACQUISITION & PROCESSING DESIGN

Duration: 2 days

Designed for: This course will be of great stimulation and challenge to all practising geophysicists in the areas of acquisition, processing and interpretation with both oil companies and service companies.

Traditional approaches to seismic acquisition focus on noise reduction with arrays and always prove to be inadequate since they also filter the signal. Traditional processing procedures thus have a dual role - initially to repair the damaged signal and then enhance it. It is too late. The damage is already done.

Anstey (1987) was the first to suggest better methods of acquisition. His "design on the signal" and "STACK ARRAY" ideas were followed by Ongkiehong (1988) who advocated spatial aliasing of the noise as the optimal method for signal-to-noise separation and therefore signal enhancement. Ongkiehong's method, however, forces the data user into the domain of F-K space, a domain where geophysicists are not comfortable.

This 2-day course was developed in 1990 to address problems the author perceived existing in acquisition and processing practice which has detrimental effects on the quality of the seismic data presented to the interpreter. The traditional aspects in acquisition (arrays, spatial aliasing, noise), processing (deconvolution, F-K filtering) and interpretation are briefly discussed and problems associated with them are reviewed. Novel techniques for significant improvement in the quality of recorded and processed data are presented and their impact demonstrated in real data cases.

This course will briefly review these techniques and demonstrate by example that properly designed acquisition and processing in F-K space can produce seismic data with virtually zero linear noise. The method is usually valid for land or marine exploration targets.

• The Closed Loop
  • Systematic Seismic Exploration
• Resolution
  • Tuning Thickness/sidelobe Tuning
  • the Lobeless Wavelet
• Seismic Acquisition
  • Desirable Signal Properties
  • Noise
  • Arrays
  • Spatial Aliasing
  • Consequences of Acquisition
• New Acquisition Techniques
  • Anstey
  • Ongkiehong Theory & Practice
  • The Closed Loop Revisited
  • Engineered Seismic Acquisition
  • Array Normalization
  • F-k Filtering & Ongkiehong
  • Generalized Procedures
  • Signum Processing
  • Case Histories