Volume-6 ~ Issue-4 ~ JULY-AUG-2018

Abstract: The thermo-tectonic event during the Santonian created the Afikpo Basin. Afikpo Basin is filled with Cretaceous sediments aged Albian to Maastrichtian. This work interprets aeromagnetic data over the basin to define the structural complexity, depth to basement and sedimentary thickness within the Basin, which would serve as an aid to further exploratory work in the basin. Analytic signal, first vertical derivative and source parameter imaging were applied to enhance the data for interpretation. The structures within the basin trend majorly in the NE-SW direction with minor NW-SE and NS trends. Lineament density analysis showed that sediments at the east of Afikpo, east..........

Keywords- Hydrocarbon, Inland Basin, Afikpo, Arochukwu, Ikot Ekpene, aeromagnetic, first vertical derivative, analytic signal, source parameter imaging, exploration, sediment thickness

Abstract: Rumaila oilfield is the largest subsurface structural anticline in the southern Mesopotamia Plain of Iraq. It consists of two culminations these are the North and South Rumaila with N-S and NW-SE fold axes, respectively. Borehole breakouts data from Image-logs of 90 wells in the Mishrif Formation within Rumaila oilfieldwere used to derive the stress pattern.The World Stress Map shows no data within the study area. This study aims to contribute in adding borehole breakouts data of the Rumaila oilfield to the map and correlate this data with the data from other oilfields within the Iraqi-Iranian border. Results of this study show that the direction of the horizontal maximum stress axis at the North Rumaila is 358 and South Rumaila is 351.These results depict that the maximum stress axes are not perpendicular to the fold axis.The stress axes havean inclined angle of 7at North Rumaila........

Keywords: Rumaila oilfield, Stress pattern, Borehole breakouts, Mesopotamia Plain, Rotation of the Arabian Plate..

Abstract: Reservoir modelling has been used to predict reservoir performance and gain understanding of reservoir uniqueness in "AWE FIELD" Eastern Niger Delta.A qualitative and quantitative approach was adopted to characterise and model the hydrocarbon bearing sands in the study area. Deviation/survey data, 3D seismic volume, wireline logs for five wells and checkshot data were used for this study. Reservoir zone G and I were delineated and correlated across the 5 wells using reservoir modelling software. The deterministic model adopted distributed the rock properties (structural, petrophysical and facie data) into a 3D grid using Sequential Gaussian Simulation and Sequential Gaussian Indicator algorithm. From this study three major faults were identified across reservoirs G and I. Well point petrophysical values were computed and compared with the deterministically modelled results. Reservoirs G and I have average thickness of 661ft and 558ft, net-to-gross of 78% and 75%, porosity of.......

Keywords: Deterministic model, Sequential Gaussian Indicator algorithm, porosity, permeability, distributary channel fill, Shoreface, Niger Delta, well point value.

Abstract: This research focuses on using shape indices to determine the paleoenvironment of deposition using quartzite clasts, in the Pebble Belt (Odoro Ikpe) Area. Methodologies applied in this research include fieldwork and Pebble morphometric analysis which has been used to determine the depositional environment following parameters Maximum Projection Sphericity (MPS), Oblate – Prolate Index (OPI), Roundness, Elongation Ratio (ER) and Pebble Form for the study area. The range of values for MPS, OPI, Roundness and ER are 0.61 - 0.68, -1.17 - 2.02, 0.42 -1.02 and 61.04 - 68.90 respectively. Whereas the mean values of ER, MPS, OPI and Roundness is 0.72, 0.65, 0.44 and 65.6 respectively. Bivariate plots of MPS versus OPI and Roundness versus ER suggest the paleoenvironment as......

Keywords: Pebble belt, Beach / Littoral, Fluvial influence, Morphometric parameters..

Abstract: The lead – zinc ores in the Upper Benue Trough occur as veins within the Albian Bima sandstones. The homogenization and freezing temperatures determined in sphalerites indicate that they were precipitated from a moderately hot mineralizing fluid (176o -254oC) but considerably less saline fluids 16.04 Eq. wt.% NaCl.Sulfur isotopic composition of the sphalerites and galena ranges from + 7.9 to + 14.5 per mil and + 5.3 to +17.5 per mil respectively, suggesting systematic depletion of the sulfides relative to contemporaneous Cretaceous seawater sulfate.The nature of the fluids deduced from the D∕H isotopicanalyses of fluid inclusions in sphalerite and galena gave δD values of -23 to -28̠̠̠ per mil and -35 per mil respectively. These values are consistent with sedimentary basin formation.......

Keywords: Isotopic signatures, Ferruginised, Conglomeratic, Interbedded, Benue Trough, Albian, Turonian..

Abstract: In the wildcat sedimentary basin which will be explorated oil and gas, to increase the possibility discovery of find of commercial oil and gas must be benefit from approximately 90 years of experience in petroleum hydrogeology. These methods provide considerable simplicity especially in geological and geophysical surveys on illuminating subsurface geology. The HYDROPET is a new computer software was developed by authors to contribute to oil and gas exploration, especially in geologically complex and wildcat sedimentary basins. The program is developed with chemical and isotopic classification, analysis and interpretation methods proposed by a large number of different researchers based on water chemistry analysis data.This study includes test results in known oil and gas production fields that composed of different and complex geological structures.Results of the program........

Keywords: Oil and gas exploration, oilfield waters, formation waters,hydrochemistry, HydroPet software..