TITLE:
Static Reservoir Modeling Using Well Log and 3-D Seismic Data in a KN Field, Offshore Niger Delta, Nigeria
AUTHORS:
Lukumon Adeoti, Njoku Onyekachi, Olawale Olatinsu, Julius Fatoba, Musa Bello
KEYWORDS:
Porosity; Permeability; Water Saturation; Volumetric Calculation; Facies
JOURNAL NAME:
International Journal of Geosciences,
Vol.5 No.1,
January
23,
2014
ABSTRACT: This study focuses on the application of 3D static model
using 3-D seismic and well log data for proper optimization and development of
hydrocarbon potential in KN field of Niger Delta Province. 3D Seismic data were
used to generate the input interpreted horizon grids and fault polygons. The
horizon which cut across the six wells was used for the analysis and detailed
petrophysical analysis was carried out. Structural and property modeling (net
to gross, porosity, permeability, water saturation and facies) were distributed
stochastically within the constructed 3D grid using Sequential Gaussian
Simulation and Sequential Indicator Simulation algorithms. The reservoir structural model show
system of different oriented growth faults F1 to F6. Faults 1 and Fault 4 are
the major growth faults, dipping towards south-west and are quite extensive. A
rollover anticline formed as a result of deformation of the sediments deposited
on the downthrown block of fault F1. The other faults (2, 3, 5 and 6) are minor
fault (synthetic and antithetic). The trapping mechanism is a fault assisted
anticlinal closure. Results from well log analysis and petrophysical models
classified sand 9 reservoir as a moderate to good reservoir in terms of facies,
with good porosity, permeability, moderate net to gross and low water
saturation. The volumetric calculation of modeled sand 9 horizon reveals that
the (STOIIP) value at the Downthrown and Ramp segment are 15.7 MMbbl
and 3.8 MMbbl respectively. This implies that the mapped horizon indicates hydrocarbon accumulation in economic quantity. This study has also demonstrated
the effectiveness of 3-D static modeling technique as a tool for better
understanding of spatial distribution of discrete and continuous reservoir
properties, hence, has provided a framework for future prediction of reservoir
performance and production behavior of sand 9 reservoir. However, more
horizontal wells should be drilled to enhance optimization of the reservoir.