Offset Footprint Analysis for Selecting Candidate Lines for Seismic Survey

摘要

An analysis is proved to determine a candidate line for at least one vessel to traverse in a 3D seismic survey to achieve desired coverage either along a planned line or a new infill line. The analysis can also be used in a 4-D survey to determine the coverage of a candidate line relative to the baseline survey previously conducted. The analysis determines a coverage footprint of the common midpoint lines, at given offsets, so the user or automated system can select a candidate line to achieve the best coverage.

主权项

1. A seismic surveying method, comprising:
obtaining developed data related to acquisition of seismic data acquired by sailing at least one vessel along one or more developed sail lines of an acquisition plan, each of the developed sail lines having a developed footprint of the developed data; predicting a first candidate footprint for acquiring first candidate data along a first candidate sail line adjacent one or more of the one or more developed sail lines; comparing the first candidate footprint with respect to the adjacent one or more developed footprints; quantifying the comparison for an operator; and receiving an instruction from the operator for sailing the at least one vessel based on the quantified comparison.