Upper Jurassic thrombolite reservoir play, northeastern Gulf of Mexico

Abstract

bama. His research focus is on reservoir charactertization and modeling, petroleum systems, and the application of stratigraphic analysis to petroleum exploration.

Origin and evolution of an Upper Jurassic complex of carbonate buildups from Zegarowe Rocks (Kraków–Wieluń Upland, Poland)

“…The Upper Jurassic microbial megafacies (Gwinner 1971;Matyszkiewicz 1999), including numerous microbial-sponge carbonate buildups, developed mainly on the northern shelf of the Tethys and on shelves of the newly opened North Atlantic (Steiger and Jansa 1984;Leinfelder 1993Leinfelder , 1994Leinfelder et al 1994Leinfelder et al , 2002Ourribane et al 2000;Schmid et al 2001;Mancini et al 2004). Generally, causes for intensive growth of the Upper Jurassic microbial-sponge carbonate buildups in this area have been satisfactorily explained (Leinfelder et al 2002).…”

“…It is commonly accepted that carbonate buildups of such type usually developed at the boundary between the middle and deeper parts of a carbonate ramp, following the bedrock topography. One of the causes for growth initiation of carbonate buildups was the presence of a structural high of complex origin, or break of the slope (Trammer 1985;Ellis et al 1990;Schmid and Jonischkeit 1995;Matyszkiewicz 1997;Leinfelder et al 2002;Llinás 2003;Jędrys et al 2004;Mancini et al 2004). According to Leinfelder (1994), active synsedimentary tectonics, usually associated with halokinesis, was the main factor favouring development of the Upper Jurassic shallow-water coral reefs growing within a setting strongly contaminated by siliciclastics.…”

Calcimicrobes and microbialites in lagoonal sediments from Mississippian Midale Beds, Williston Basin, southeastern Saskatchewan, Canada

“…These microorganisms stabilize grains and provide sites for mineral nucleation. Hence, they modify and create sediment (Mancini et al 2004). Syndepositional microbial fabrics may influence porosity/permeability of the carbonates.…”

“…Microscopic calcimicrobes (bacteria, algae, fungi, and protozoans) stabilize grains and provide sites for mineral nucleation. Hence, they modify and create sediment (Mancini et al 2004). Porosity developments in the reservoir may occur through stabilization, agglutination, and calcification of microbial mats that comprise of complex calcimicrobe communities associated with biofilms.…”

“…This is especially so, with respect to the calcimicrobes and microbial fabrics of the carbonate beds, which are poorly known. Such features clearly could be used for paleoenvironmental reconstructions and provide new insight into the petrographic processes of microbially induced cementation and microbially influenced dolomitization (Burns et al 2000;Hillgaértner et al 2001;Rao et al 2001;Van Lith et al 2003), as well as porosity characteristics (Mancini et al 2004). Understanding the algal and microbial components and their distribution in different facies is especially important for the evaluation of reservoir quality.…”