%K Normalized pore throat radius � Reservoir
quality index � Flow zone indicators � Niger Delta �
Flow simulation
%P 409-4416
%R DOI 10.1007/s13202-016-0297-8
%I CrossMark
%L eprints17318
%V 7
%J J Petrol Explor Prod Technol
%X The detailed characterization of complex reservoir
units, typical of the thin-bedded canyon turbidites
system within the clastic environment is essential for
accurate reservoir modelling. The sedimentary architecture
usually overprinted by late diagenesis results in the
intrinsic complexities which poses major problems in
modelling these systems. Although the average permeabilities
exhibited by most clastic reservoirs is relatively
high, the low permeabilities of the component shale strata
results in low sweep efficiency and transmissibilities, and
may form effective flow baffles. Recent advances in
petrophysical modelling and formation evaluation studies
demonstrate the applicability of normalized pore throat
radius Rtot methodology for improved reservoir characterization
and production optimization in challenging systems.
This paper presents a modification of the reservoir
quality indicator (RQI) methodology for hydraulic flow
unit characterization using the normalized pore throat
concept. Result of the analysis for the various genetic
reservoir units demonstrates an improvement with a correlation
coefficient of 78% for the proposed modified RQI
over 31% for the existing RQI method in defining the unit
slope line for the Channel Storey Axis unit. In addition,
regression analysis between the irreducible water saturation
from mercury injection capillary pressures and FZI
depicts a higher correlation coefficient of 76% for the
modified RQI over 64% for the existing method. The higher correlation coefficient indicates an improved efficacy
of the proposed model for hydraulic flow zone characterization.
The efficacy of the proposed methodology
was also validated with a numerical flow simulation model.
This demonstrates improved efficient for reservoir characterization
studies.
%D 2017
%A Haruna M. Onuh
%A O. Ogbe David
%A C.Y Onuh
%T Modified reservoir quality indicator methodology for improved
hydraulic flow unit characterization using the normalized pore
throat methodology (Niger Delta field as case study)