Stochastic 3-D
Modeling of the M-19 Heavy Oil Block
for Supporting Further Development,
Eastern
Benzaqueni, Isaac1, Antonio Brunal2, Jose Fleitas1, Jehan Anton2 (1) Petroleos de Venezuela, S.A, Puerto La Cruz, Venezuela (2) Roxar Inc., Houston, TX
An integrated study of the Block
M-19 Cerro Negro Field (64 Km2)
was performed to characterize Morichal member of Oficina formation (Miocene). The
Block
is located in the
eastern
The field structure is a monocline slightly dipping toward the
north with normal faults with east-west direction. The reservoir contains
unconsolidated sandstones deposited in a trasitional
environment of a deltaic type on upper zones and a fluvial type on the lower
zones.
Channel belts and flooding planes have a frequency of 47.8 and
41.3% respectively and lower zones presented channel belts frequency greater
than 70%.
A high resolution modeling grid was built using corner point
geometry to distribute facies and petrophysical
3D using geostatistical tools.
Input data included lithologs and well
log evaluations from 100 wells, interpreted 3D seismic horizons and a
conceptual facies model.
A sequential indicator simulation technique was used to
distribute facies in the 3D volume and sequential gaussian simulation for porosity and permeability
Ten realizations were produced and compared in order to measure
uncertainty. As a result of this study, The Oil in Place volume (9 MMMSTB) was
characterized and distributed vertically through Facies
Vertical Proportion curves and laterally through variograms
based on existing facies maps and well data.
This model will
be used in the dynamic modeling stage to plan the further development of the
field which includes 7 cluster (15 horizontal and/or multilateral wells each
one) and to maximize the oil recovery, estimated in 1100 MMSTB.