03-02b Marine seismic acquisition and 3D survey design

Conventional marine seismic acquisition

Wide-azimuth towed streamer seismic acquisition Seabed seismic acquisition CMP coverage calculation of fold matching offset and azimuth distribution to acquisition geometry. acquisition geometry attributes and survey design metrics Limitations of conventional towed streamer seismic acquisition. Economics and cost-benefit of new “advanced” marine seismic acquisition techniques. improvements in data quality and the interpretational benefits Why, where and when the new techniques are applicable

Broadband acquisition

Time lapse acquisition Simultaneous source acquisition Exercise on Ghost notch design improved resolution of broadband data. low frequencies and how they can be obtained in the field. importance of repeatability 4D acquisition. simultaneous source acquisition data quality operations efficiency

Survey Design

Objectives and methods in survey design Building an Earth model Resolution and sampling overcoming geophysical challenges. earth model for 1D and 3D seismic modeling. resolution in seismic data characterization. sampling requirements Processing interpretation of results.

Survey Design

1D earth modeling offset/angle limits, muting, bin size, fold and migration aperture 3D acquisition geometry Seismic sources and modeling 3D earth model for sub-surface coverage 3D raytracing and wave-equation illumination modeling basic acquisition geometry using a few simple equations. choices and limitations of seismic source options. subsurface complexity requires the use of 3D raytracing.

Survey Design

Logistics and efficiency in the field shooting area and shooting direction survey duration and cost survey design vs

• field logistics
• environmental factors.

acquisition parameters vs

• data quality
• acquisition cost.