ABSTRACT: A Successful Predictive Oolitic Model Using Sequence Stratigraphic Analysis in Block III, Lake Maracaibo, Venezuela

RODRIGUEZ, ARGENIS, Intevep, S.A., Los Teques, Venezuela

A predictive sequence stratigraphic model using facies analysis and seismic-stratigraphic interpretation was proposed for the Paleocene carbonate interval in Block III, Lake Maracaibo, at the 1988 AAPG annual meeting.

The model was derived from data gathered in the cored sections of wells VLC-950, VLC-812, and VLC-750. These data were studied via facies analysis and seismic-stratigraphy; seven sedimentary facies were defined, and a commercial porosity development north of well VLC-950 was predicted at that time. Three strategically located wells were also proposed in order to prove this working hypothesis.

The aim of the model was to serve as a guide in an exploration and exploitation program to be carried out in successive steps.

After economic evaluations, the first well VLC-997 was drilled and completed in June 1991. The predicted commercial porous oolitic facies was found north of VLC-950; the model was, therefore, proven valid.

With the drilling of the planned wells, a proper definition and characterization of this reservoir can be obtained and consequently, the model could be used as reference in other areas with similar geological characteristics.

AAPG Search and Discovery Article #91012©1992 AAPG Annual Meeting, Calgary, Alberta, Canada, June 22-25, 1992 (2009)