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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
By David
A. Marin, United States
Department of Interior, Minerals Management Service, Katherine M.
Ross, United States Department of Interior, Minerals Management
Service, Barbara J. Bascle, United States
Department of Interior, Minerals Management Service, Lesley D.
Nixon, United States Department of Interior, Minerals Management
Service
Originally presented at the 1998 Hedberg (AAPG) Research Conference at Galveston, TX
Book/CD-ROM Title:
Edited by
The MMS defined chronozones in the northern Gulf of Mexico on the basis of benthic foraminifera stratigraphic zones. The 26 chronozones identified by Reed et al.(1987) were further grouped into 15 Cenozoic and 3 Mesozoic chronozones for correlation purposes (figure 1) Type logs for each field in the Gulf of Mexico were constructed. Each type log is a composite of field wells showing all productive sands and their chronostratigraphic relationship. Not only were the productive sands organized by chronozone, but, based on SP log characteristics, paleoecozones, and sand content, they were also characterized by retrogradational, aggradational, progradational, and fan depositional styles. (figure 2). The chronozones and depositional styles identified on each type log were then correlated among the fields across the Gulf of Mexico. All productive sands correlated to the same chronozone and depositional style or structural setting define a unique play.
Assessment play maps for each chronozone build upon the proved reserves play limits illustrated in the offshore Atlas by including major unproved field reserves. In addition, for each play, known hydrocarbon and sand limits based on additional wells with either hydrocarbon shows or sand development, respectively, are shown.
The assessment play maps provide an organizational framework for exploration analogs in the Gulf of Mexico. Understanding the relationships of the different depositional styles allows the user to characterize reservoirs in relation to sand content and geographic extent. This knowledge further allows the user to identify the most prolific reservoir types, their locations, and the areas most favorable for future discoveries.
Hentz,T.F., S.J.Seni,and E. G. Wermund, Jr.(eds.). 1997. Atlas of northern Gulf of Mexico gas and oil reservoirs: volume 2. Pliocene and Pleistocene reservoirs. Texas Bureau of Economic Geology, Gas Research Institute, Department of Energy, and Minerals Management Service,78 p. plus plates and CD-Rom
Reed, C.J., C.L. Leyendecker, A.S. Khan, C.J. Kinler, P.F. Harrison, and G.P. Pickens. 1987. Correlation of Cenozoic sediments of Gulf of Mexico outer continental shelf, part1: Galveston area offshore Texas, through Vermillion area, offshore Louisiana. Minerals Management service, OCS Report MMS 87-0026, 35p. plus appendices.
Seni, S.J., T.F. Hentz, W.R. Kaiser, and E. G. Wermund, Jr. (eds.). 1997. Atlas of northern Gulf of Mexico gas and oil reservoirs: volume 1. Miocene and older reservoirs. Texas Bureau of Economoic Geology, Gas Research Institute, Department of Energy, and Minerals Management Service, 199p. plus plates and CD-Rom.
Figure 1. Gulf of Mexico MMS geologic time scale.