Abstract: Method for displaying and interpreting seismic data. Recorded seismic data is used to produce a stereo pair of perspective plots of seismic section for selected areas of the seismic data. The pair of perspective plots are used to produce a stereoscopic view of the seismic section. Examination of the stereoscopic view of the seismic section permits the identification of geological characteristics indicative of possible hydrocarbon deposits, including positive geophysical characteristics which would not be identifiable by examination of a single perspective plot of a seismic section alone.

Abstract: A method for indicating the proximity of a hydrocarbon reservoir by measurements of thermal gradients in dry holes. Due to the lower thermal conductivity of hydrocarbon-containing rock, the thermal gradients within such rock are abnormally high when compared to normal subsurface thermal gradients and the anomaly extends well beyond the boundaries of the reservoir. Geothermal gradients are measured along the entire length of deep boreholes, which have proved to be dry, or in shallow test boreholes. A comparison of the shape of such gradient curves to theoretical curves indicates the presence of a hydrocarbon deposit spaced laterally from a deep dry hole or below a shallow surface test hole.

Abstract: A simple geoelectric remote sensing cable comprising a single current electrode and a relatively large number of sensing, or potential, electrodes. The current electrode is at the center of the logging cable and the sensing electrodes are arranged symmetrically about the current electrode in such a manner that the spacing between adjacent sensing electrodes increases with distance from the current electrode. In the preferred embodiment, the sensing electrode spacings are all integral multiples of a basic interval unit, such as two and one-half feet. The cable is pulled from the bottom of a borehole to the top at a fixed rate while a fixed current is supplied to the current electrode and the voltage differences between each adjacent pair of sensing electrodes are recorded after each movement of a distance equal to the basic interval or an integral fraction thereof.