ERHC Energy Inc (ERHE)

[Curious62]

Seismic data is used to identify structures. If enough information can be gathered regarding rock densities, rock types (and other info), it can sometimes be fine-tuned to "see" indications of gas. Oil and water do not have sufficient density contrasts to be distinguished. It works like an ultrasound. Its much simpler to get an clear ultrasound image because the precise densities, thickness and shape of the human body is known. When one explores with seismic data in a relatively unknown area, every variable necessary to create an image must be "guessed". With additional information (drilling, well logs, rock and hydrocarbons samples), the picture becomes more accurate.