The structural framework and stratigraphy of the Ariki Field in the Western Shallow Offshore Depobelt, Niger Delta Basin, Nigeria are interpreted using well logs and 3-D seismic data, and the control of rift on hydrocarbon accumulation is analyzed. Five maximum flooding surfaces and five sequence boundaries are identified in the major reservoir of Agbada Formation in the field; and the structural framework of the field is controlled by the major faults, minor faults and rollover anticline formed by extensional tectonic movement. There are a total of seven faults identified across the field, including 3 major faults and 4 minor faults. On the western flank of the field, graben and horst-like structures were created by the minor faults. Fault throw analysis shows that below 1800 ms, the major faults with fault throw increasing act as hydrocarbon migration pathways, while above 1800 ms, with fault throw decreasing, they act as seals of hydrocarbon traps. There are four-way dip rollover anticlines and 3-way downdip traps created by the minor faults, and other prospective traps in the study area, which have substantial oil exploration potential.
AHANEKU C V
,
OKORO A U
,
ODOH B I
,
ANOMNEZE D O
,
CHIMA K I
,
EJEKE C F
,
OKOLI I N
. Stratigraphic sequence, structural framework and hydrocarbon migration of Ariki Field, Nigeria[J]. Petroleum Exploration and Development, 2016
, 43(1)
: 77
-83
.
DOI: 10.11698/PED.2016.01.09
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