Methods and systems for gridding of salt structures

A system for gridding of subsurface salt structures, the system comprising:

• a line that is moved a straight line for performing a two-dimensional reflection seismic survey and that comprises sound detectors, sound sources, and recording cables,
• a computer that is communication with the sound detectors and that comprise non-transitory computer readable medium including program instructions that when executed by a processor cause the processor to perform the operations of:
• determining a predetermined area that lacks three-dimensional seismic coverage;
• generating a two-dimensional map of seismic top salt interpretation for the predetermined area based on data received from the two-dimensional reflection seismic survey performed by moving both sound sources and sound detectors along the straight line;
• generating a map of bathymetry elevation of the predetermined area;
• determining that at least one two dimensional seismic line intersects a bathymetric feature of interest;
• deriving an experimental variogram from the two dimensional seismic top salt interpretation and the smoothed bathymetry elevation of the predetermined area;
• fitting a variogram model to the experimental variogram to grid the two dimensional seismic top salt interpretation;
• determining a correlation coefficient between the two dimensional seismic top salt interpretation and the bathymetry elevation by cross-plotting the two dimensional seismic top salt interpretation and the bathymetry elevation;
• and applying the bathymetry elevation as an additional control for gridding top of the subsurface salt structure when the correlation coefficient is greater than 70%.

A computer-readable program including program instructions that when executed by a processor cause the processor to perform the operations of:

• determining a predetermined area that lacks three-dimensional seismic coverage;
• generating a two-dimensional map of seismic top salt interpretation for the predetermined area based on data received from a two-dimensional reflection seismic survey performed by moving sound sources and sound detectors along a straight line;
• generating a map of bathymetry elevation of the predetermined area;
• determining that at least one two-dimensional seismic line intersects a bathymetric feature of interest;
• determining a correlation coefficient between the two-dimensional seismic top salt interpretation and the bathymetry elevation by cross-plotting the two-dimensional seismic top salt interpretation and the bathymetry elevation.