Advances in the Application of Biostratigraphy to Petroleum Exploration and Production
Olawumi1, Adewole Oyede1, Edward Okosun2 (1)
Shell Petroleum Development Company,
Petroleum exploration routinely employs biostratigraphic zones in dating rock units. As the world’s hydrocarbon basins mature, most of its subsurface uncertainties lay at reservoir scale, hence the need for a change of strategy in the application of biostratigraphy. This gave rise to the word production biostratigraphy, where biostratigraphy can play a role in reservoir characterisation, correlation and well site operations. To apply this technique, field specific bioevents are determined and tested for consistency.
Seismic/sequence biostratigraphy, ecostratigraphy, quantitative stratigraphy and biostratigraphic workstations are part of the recent advances that will be highlighted.
The effect of sample storage, type of drilling bit and mud on biostratigraphic analysis will also be discussed.