General Thoughts, page-2371

Got a G&G question for colleagues like V10 and OldGeo

For example, according to Dr. Marcio Mello you should look for reservoirs in deeper water and drill deeper. (his mantra: drill deeper in deeper water) The explanation is that the turbidite has to travel a certain distance that when it settles down and only than you will get clean sand layers and on top the finer clay particles as seal during the sedimentation process in the seawater. The sediments need a certain travel velocity, energy and some time to seperate the sand particles from the finer particles during sedimentation after the turbidite avalanche went down the vally. There is somewhere a publication which observed such a process as it has happend recently somewhere on the West African Coast (unfortunately I did not save the web adress respectively the article/report).

When you look at the position of the Saturn turbidite fan:



you see that the turbidite flow was stopped by the blue marked carbonate. Because of this: How do you assess the risk that we have shaly sandstones there? Or do you think we get more sdst-clay layers (like cake or sandwich layers) for example because the flow of the turbidite was disturbed? Do you think the quality of the new seismik is good enough to identify the sweet spots in this big turbidite fan, for not to drill into sections with dirty sandstones with poor reservoir quality only?