Changes

What is the attraction of 3-D? Why do you want a 3-D survey rather than a (less expensive) grid of 2-D seismic lines? A 3-D seismic survey has many advantages over a 2-D line or a grid of 2-D lines—even a dense one. (A2-D grid is considered dense if the line spacing is less than about 1/4 mile [1,320 ft; 400 m].) The advantages of 3-D include the following:

What is the attraction of 3-D? Why do you want a 3-D survey rather than a (less expensive) grid of 2-D seismic lines? A 3-D seismic survey has many advantages over a 2-D line or a grid of 2-D lines—even a dense one. (A2-D grid is considered dense if the line spacing is less than about 1/4 mile [1,320 ft; 400 m].) The advantages of 3-D include the following:

* True structural dip (2-D may give apparent dip)

* True structural [[dip]] (2-D may give apparent dip)

* More and better stratigraphic information

* More and better stratigraphic information

* Map view of reservoir properties

* Map view of reservoir properties