Exploration in Deserts of
Dietmar, Luis Clavijo, Daniel Hitzman, Geo-Microbial Technologies, Inc,
Surface geochemical exploration for petroleum is the search for surface or near-surface occurrences of hydrocarbons and their alteration products. It has been well documented that most oil and gas accumulations leak, that this leakage is predominantly vertical, that it is dynamic, and that this leakage can be detected and mapped using any of several direct and indirect methods. Hydrocarbon microseepage surveys in deserts require careful planning and implementation. Microseepage data are inherently noisy and require adequate sample density to distinguish between anomalous and background areas. To optimize the recognition of a seepage anomaly, the sampling pattern and sample density must reflect survey objectives, expected size and shape of the target, and expected variation in surface measurements. Defining background values adequately is an essential part of anomaly recognition and delineation. Undersampling and/or the use of improper analytical techniques is a major cause of ambiguity and interpretation failures.
microbial and soil gas surveys in the deserts of