Geologic
Characterization Using 3D Modeling, Upscaling, and
Simulation: Case Study of Serra Field in Potiguar Basin, Northeast of Brazil
Pimentel, Vicente1, Ricardo
Oliveira1, Yoe Reyes-Perez2, Flavio Oliver2 (1) Petrobras,
Natal, Brazil (2) Schlumberger - SIS,
Natal, Brazil
In the last years, have been popularized
a quantitative tool for generating multiple reservoir models constrained to
geologic, seismic, and production data. The Serra
field was discovered in 1996 and is located in NE portion the Potiguar Basin, northeast of Brazil. Positioned on the Macau high, a positive
element of the basement, this field has peculiar characteristics. The reservoir
is Upper Cretaceous fluvial sandstone of Açu
formation located in the transitional zone within water depth range from zero
to 3 meters. To development of the field are necessary a constant studies and
special operations that include seismic survey in the transition zone and SRW
well perforation with 3200 meters of displacement and 1000 meters of depth. To
study the reservoir characteristics and propose new locations a 3D geological
model was built using the information of 26 wells and 3D modeling software. The
3D geological model is composed by 17 zones that were populated with facies and petrophysical properties
(porosity, permeability and water saturation) using geostatistical
algorithms. Deterministic scenarios of derived reservoir quality distribution
were incorporated into a reservoir model and subsequently exported and upscale
for dynamic simulation. The area of interest can be modeled with more accuracy,
which will result in more accurate volume calculations and to construct new
well paths for further development of a field. The simulation of flow was
effected for the two main zones of the field using black oil corner point model
with 99 x 98 x 45 blocks.