Jim Sledzik, Partner and President of Energy Ventures , and Neil Dyer, Vice President of geophysical services for ARKeX Ltd. , contributed expert commentary regarding the oil and gas industry's use of measurements to describe what cannot physically be seen in the subsurface. Over the years such technologies as gravity, magnetics, seismic, and well logs have helped operators better understand their reservoirs and, ultimately, get more out of them. To read the full article, click here .