The reservoir characterization of Buma Field, Niger Delta using seismic and well log data is the focus of this research.
Seismic data in SEG-Y format and suites of well logs have been used to achieve the aim and objectives of the research.
Methodologies used in this work are standard methods used in this kind of research. Results of the analysis seismic
data shows fifteen faults have been identified, nine trend NW-SE and are antithetic faults whereas the six trend NESW and are synthetic faults. These faults formed closures and could act as trapping mechanisms for hydrocarbon in
the identified horizons/reservoirs. Two hydrocarbon bearing horizons D and F have been mapped on the seismic and
analysis of the well logs showed that sand and shale are major lithologies in the studied wells. Well correlation showed
similarities in geological properties such as lithology, reservoir tops and petrophysical properties. Volumetric estimation
carried out on the two reservoirs showed Reservoir D having average thickness of 26.73 ft., area of 3784.89 acres,
bulk volume of 4407x106
ft3
, net volume of 4226x106 ft3
, pore volume of 216 x106
RB, hydrocarbon pore volume (oil)
of 143x106
RB and STOIIP of 77 MMSTB. Reservoir F has an average thickness of 41.55 ft., area of 2790.63 acres,
bulk volume of 5051x106 ft3, net volume of 4769x10106 ft3
, pore volume of 248x10106
RB, hydrocarbon pore volume
(oil) of 167x10106
RB and STOIIP of 88 MMSTB. Integrating results of structural interpretation, well log analysis,
petrophysical properties and volumetric estimation it is evident that both reservoirs have very good porosities and
excellent permeability, good thicknesses of productive sand and reduced water saturation as to aid storage and easy
flow of hydrocarbon pore fluids. Therefore, the two Buma Field Reservoirs D and F are prolific with hydrocarbon pore
fluids (oil) which can be exploited economically
An integrated petrophysical-based wedge modeling and thin bed AVO analysis for improved reservoir characterization of Zhujiang Formation, Huizhou sub-basin, China: A case study