An integrated source rock potential, sequence stratigraphy, and petroleum geology of (Agbada-Akata) sediment succession, Niger delta: application of well logs aided by 3D seismic and basin modeling

Abstract

We investigated the source rock potential, sequence stratigraphy, and characterized hydrocarbon reservoirs at Otumara field, Niger delta, using integrated 3D seismic, wireline log analysis, and basin modeling. The burial history and thermal maturity were modeled, the reservoirs were delineated, and the petrophysical parameters were also estimated from the wireline logs. The Passey “ΔLog R” method for estimating the preliminary evaluations of the total organic carbon (TOC) from integrating sonic, neutron, and density with resistivity has been used. The results indicate that the primary source rock of hydrocarbons is the Upper Akata Formation, despite a higher TOC percentage in the Agbada Formation. Based on sequence stratigraphy analysis, TA4, TB1, TB2, and TB3 second-order supercycles were obtained in the studied well TD46. The results also revealed that the field has two large net pays with high-quality reservoir facies: a deltaic slope fan at the upper shoreface and a river mouth sandbar at the lower shoreface. Furthermore, the reservoirs were faulted by a series of growing faults that faulted the basin slope. The reservoir facies are characterized by an average of 18% porosity, 1200 mD permeability, 16% volume of shale, and high hydrocarbon saturation of about 85%. Finally, the petroleum system elements have been defined for improved hydrocarbon exploration. In the absence of complete or partial core samples, this case study emphasizes the importance of using wireline logs to estimate organic richness and investigate sequence stratigraphy in clastic sediments.

Seismic attributes and spectral decomposition-based inverted porosity-constrained simulations for appraisal of shallow-marine lower-Cretaceous sequences of Miano gas field, Southern Pakistan

“…The 3D seismic attributes have been successfully executed in subsurface systems and are aimed at exploring these oil- and gas-generating traps in sedimentary basins, which might be of structural, stratigraphic, or combination trap types [ 2 , 21 , 22 ]. Various researchers around the globe have applied various amplitude-based seismic attributes to look for additional oil and gas reserves [ [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] ]. The application of pure geological and full-spectrum geophysical tools constrains the prediction of porous stratigraphic traps.…”

Three‐dimensional structural modelling of structurally complex hydrocarbon reservoir in October Oil Field, Gulf of Suez, Egypt

“…Data integration plays a critical role in oil and gas studies and includes geological settings, seismic, geophysical logs, sedimentology, geochemistry, and geomechanical datasets (Diab et al, 2022; Khan et al, 2023; Manzoor et al, 2023; Marghani et al, 2023; Naseer et al, 2022; Radwan, 2021b; Radwan, 2021c; Radwan, 2022d). The integration of various disciplines, such as geology, geophysics, petrophysics, and reservoir engineering data, is a key factor in creating structural and static logic subsurface models that can aid in oil exploration and development, which is critical for meeting global energy demands.…”