PetroStrat proposes to undertake a consortium-based biostratigraphic study of a number of wells that penetrate the Lower Tertiary sands in the deep water GoM.
This will help to establish a robust high resolution biostratigraphic / sequence stratigraphic framework for the Eocene-Paleocene succession and facilitate correlation of the stacked sands that make up the basin floor fans that are commonly attributed to the Wilcox. Companies are now being invited to register an interest and to indicate any wells and datasets they may wish to offer to the study.
Biostratigraphic studies of the Wilcox have traditionally utilized forams and nannofossils, but age diagnostic forms and reliable correlative events are often scarce in the deep water depositional system. This reflects either calcite deficiency/dissolution or the dominance of terrigenous material in the deep water depositional system, diluting autochthonous marine fossil assemblages. Relatively little use has been made of palynology, and yet this discipline is proven as the most valuable biostratigraphic tool, most especially within the Paleocene succession.
Strong demand for a study is evident from companies who are requiring/requesting greater resolution using a consistent biostratigraphic framework (driven by palynology) and which is integrated with all the available biostratigraphic data and wireline log interpretation.
We envisage the study including between 20 and 25 wells, dependent upon how many companies participate. The study will require a collaborative effort between companies (by way of forming a consortium). Companies will be invited to offer up sample material, wireline logs and pre-existing biostratigraphic data (any existing foram, nannofossil and palynological data).
The interval of interest will be from Middle Eocene to base Paleocene or well TD. The end product will include interpreted palynological fossil distribution data charts incorporating other biostratigraphic data (where made available) and interpreted PetroStrat zones. Integration with existing foram and nannofossil data will enhance the value of the project. A series of cross- sections and maps will be generated tied to the sequence stratigraphic framework that PetroStrat is developing for the Lower Tertiary depositional system in the GoM. This framework is being enhanced by another project PetroStrat is undertaking of onshore wells and outcrops, details of which are available separately.
For more information, please download our PDF flyer.