Easy to use calculators for your seismic program.
3D Seismic field terminology
A line that has sensors (Geophone/Hydrophone) laid out at specified intervals within a seismic program.
Source Line Interval
The distance between 2 adjacent source lines.
Receiver Line Interval
The distance between 2 adjacent receiver lines.
The distance between adjacent source points along a source line.
The distance between each group of receivers (or single sensors) along a receiver line.
The direction parallel to the receiver lines.
The direction perpendicular to the receiver lines.
All stations (receiver points) that are actively recording for a given shot point.
Typically defined by the: (# of receiver lines) X (# of receivers per line).
Swath / Salvo
All the shot points between adjacent receiver lines.
recording patch methodology
Rolling on / rolling off:
The process of recording with a partial patch on the edges of the seismic program. This process ensures that the required offsets are obtained while avoiding the acquisition of unnecessary far-offsets, thus maximizing the field crew's efficiency.
Recording Patch Types:
All stations (receivers) in a 3D seismic program are actively recording data for all shot points on the project.
Complete lines of station (receivers) are actively recording data as the seismic program is being acquired. You will notice that the first shot point in the project will have 1/2 of the full recording patch.
Roll Lines and Stations
Lines and station (receivers) are actively recording data as the seismic program is being acquired. You will notice that the first source point in the project will only have 1/4 of the full recording patch
Below is an animated example of Roll-on / Roll-off Seismic Acquisition:
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