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Oil Exploration: The Method of Stratigraphy

These days, utilizing the method of stratigraphy is very common when looking for oil deposits. Among the definitions that have been given to stratigraphy, the one that is considered to be the most appropriate refers to the branch of geology concerned about all the characteristics and attributes of rocks as they are in strata, and the interpretation of strata in terms of derivation and geological background. In general, the stratigraphy is a method in which correlations between wells and strata, fossils, radioactivity and electrical data are established for finding out the composition, ordering, foundation of rock strata and rock softness or hardness. With the purpose of understanding a bit better what stratigraphy is, it is crucial to know what stratum means. It is defined by the website as “a bed or layer of sedimentary rock having approximately the same composition throughout.”

Since the method of stratigraphy when dealing with exploration to find oil is very comprehensive, there are many different kinds of implementation that geologists or explorers use in order to get better results in this wide-ranging procedure they are involved in. Due to the large amount of really important information that they deal with, explorers keep track of them in particular logs. As examples, driller’s log, electrical logs, acoustic logs, sample logs, time logs and radioactivity logs are utilized by these professionals in order for them to be assisted with a more exact prediction of where oil bearing strata come about.

In order to discover lithologic sequences and key beds, they take sample logs that are gathered from well cores and cuttings. These core samples confer geologists the opportunity of getting to know fundamental information of saturation, permeability and porosity of rock in the corresponding well. Thus, all these logs provide the stratigrapher with facts regarding density fluids, sorts of rocks, depth, the time that drilling through strata takes and, of course, the detection of key beds among other varied kinds of data. Once all this information has been collected, it is contrasted with other data they have access to, and in this way, they try to improve the possibilities of getting to find oil in an easier and cost effective way.

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