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Petrophysical Evaluation of Reservoir Sand Bodies in Kwe Field Onshore Eastern Niger Delta
ASUBIOJO, T.M. & OKUNUWADJE, S.E.
Abstract
Reservoir sand bodies in Kwe Field, coastal swamp depobelt, onshore eastern
Niger Delta Basin were evaluated from a composite log suite comprising gamma ray,
resistivity, density and neutron logs of five (5) wells with core photographs of one (1)
reservoir of one well. The aim of the study was to evaluate the petrophysical properties of the
reservoirs while the objectives were to identify the depositional environment and predict the
reservoir system quality and performance. The study identified three reservoir sand bodies in
the field on the basis of their petrophysical properties and architecture. Reservoir A has an
average NTG (61.4 %), Ø (27.50 %), K (203.99 md), Sw (31.9 %) and Sh (68.1 %); Reservoir
B has an average NTG (65.6 %), Ø (26.0 %), K (95.90 md), Sw (28.87 %) and Sh (71.13 %)
while Reservoir C has an average NTG (70.4 %), Ø (26.1 %), K (91.4 md), Sw (25.0 %) and
Sh (75.03 %) and therefore show that the field has good quality sandstone reservoirs saturated
in hydrocarbon. However, the presence of marine shales (or mudstones) interbedding with
these sandstones may likely form permeability baffles to vertical flow and compartmentalize
the reservoirs. These reservoirs may therefore have different flow units. Integrating wireline
logs and core data, the reservoir sand bodies were interpreted as deposited in an estuarineshoreface
setting thus indicating that the Kwe Field lies within the marginal marine mega
depositional environment.
Keywords
Estuarine; Shoreface; Reservoir; Sand; Kwe; field
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