The Rest of Geophysics
There are many contexts where seismic technology, despite its many capabilities, falls short of full description of the subsurface. For example, the seismic data may be of sufficient quality to provide an acceptable seismic image, but not of enough quality to enable physical characterization of the subsurface, in terms of fluids, pressures, etc. In many such cases, one or another non-seismic technique may be useful. Of course, each subsurface problem lends itself to a particular technology, or not, depending on the problem to be solved.
The classic non-seismic methods are gravity, magnetics, and resistivity methods; of these gravity is perhaps the most exciting these days, for hydrocarbon exploration and exploitation, because of the development of new instrumentation, the new access to instrumentation developed by the military during the Cold War, and the possibility to conduct time-lapse surveys ("4D gravity"). If you are interested to learn more about the application of these techniques to your problem, perhaps you should consult with Delta Geophysics
However, the most exciting new non-seismic technology is Controlled-Source Electromagnetics (CSEM). New developments have recently allowed the extension of classic borehole-based methods for Direct Hydrocarbon Detection (the original basis for the entire logging industry!) to application from the surface, to identify hydrocarbon reservoirs at depth. Of course, these methods lack the spatial resolution of seismic images, but they show the electrical resistivity (rather than the elastic impedance) at depth, which translates, in many geologic contexts, to hydrocarbon fluids at depth. Coupled with seismic imaging, these methods constitute a powerful new tool for reducing risk in drilling decisions.
We have been leaders in establishing the second generation of CSEM technology. Just as refraction seismics was replaced by reflection seismics, we think that these new methods will become the tool-of-choice in many contexts. We are now free of previous proprietary and non-compete restrictions on our use of these ideas, and would be pleased to help you use them to solve your exploration and production problems.