Abstract: Sequence stratigraphy model developed for the Ningning field is based on the interpretation carried out on the different wells that penetrated the various subsurface lithologies. Basically three depositional sequences were delineated from the five wells studied. The Vail model used made out a third and forth order stratigraphic surfaces that all fall within the central swamp depobelt of the Basin. The five wells used show the presentation of the interpretation and the models. All th...
ABSTRACT This work presents the first detailed, structural framework, characteristic and types of traps which are found in the South-Eastern part Rukwa basin, located in the Western Branch of the East African Rift System, South-Western Tanzania. The goal of this work is to examine the structural framework which control trapping characteristic of the Rukwa basin within the Karoo and Lower Lake Beds reservoir. 2D seismic datasets that were collected in 1983 by Amocco obtained from TPDC were an...
ABSTRACT This study conducted within southern parts of Rufiji Trough include Lukuliro area which has been potential target for oil and gas exploration since 1980’s years. Within Rufiji trough, the discovery of Wingayongo seeps (onshore) and SongoSongo gas (offshore) attract attention on exploration activities within Rufiji trough. The previous works conducted within Lukuliro area failed to establish traps which are well demonstrated in this study. The structural and sequence stratigraphy f...
Abstract In this study, sodium cyanide leaching technology has been used to recover gold from tailings that are used by Mawelo small scale miners, located in Chunya district, Mbeya region, Tanzania. The sample collected was sent for analysis of mineralogical composition and average particle size. The fractions retained on each sieve, which ranged 180 – 500 μm were used in the leaching experiments. The leaching was implemented using sodium cyanide with concentration in the range of 500 – ...
A,s i.mpI e correlation has been .developed for estimating primary "recovery facto;rs for Niger Deltaoil reservoirs~The correlation ,. which was developed, from data collected across the Niger Delta, 'is valid for reservoirs with strong, wa~ter d'r Lves. .. " I~ , ' , Only two major parameters are r equi r-ed ,for 'the recovery factor "calculations . in this" work, ',unlike other multi-parameter correlations. This 'makes t.hLs rco.rr'eLat.Lonvery easy to apply. An expression has also beeri in...
Abstract Globally, 30–50% of hydrocarbon volumes in silici-clastic reservoirs are contained within the thin-bedded pay. In the Niger Delta deep water assets, over 30% of in-place volumes are found within the complex turbidites. The presence of multi-pore architecture within such facies makes their description from petrophysics very complex. With the quest for hydrocarbon prospects in frontier deep water settings characterized by such complex rock fabric, detailed reservoir characterization...
Abstract Uncertainty analysis of flow performance predictions involves identifying significant reservoir parameters impacting the flow response. Uncertainty analysis often requires conducting large number of reservoir simulation runs. In this work, experimental design theory (DoE), Response Surface Methodology (RSM) and numerical simulation were integrated to reduce the number of simulations and simplify the optimization process. Various investigators have applied DoE/RSM to approximate a co...
Abstract A composite reservoir is one with multiple lateral compartments; each having distinct rock and fluid properties separated by geologic discontinuities. Geologically, composite reservoirs separated by leaky faults are rife but literature containing detailed three dimensional analyses of such anisotropic systems is few. For the first time using transform methods, a general three dimensional point source semi-analytical solution for the drawdown response in composite clastic and natura...
This study identified and correlated hydrocarbon bearing reservoirs, interpreted geological structures and petrophysical parameters and described facies and environment of deposition using seismic and well log data. These were with a view to assessing the impact of reservoir heterogeneity on petrophysical parameters and to determine the hydrocarbon potential of “Devo” Field, Niger Delta. Po...
Recovery from thin oil rims are generally affected by the depletion strategies, reservoirarchitecture, operational and reservoir uncertainties. Irrespective of the oil rim thickness,size of the gas cap and aquifer, recoveries are generally low because of pressure depletionrates. Oil recoveries during gas and water injections are also often low due to ineffectivestudy of uncertainties in reservoir parameters. Previous studies on Water Alternating Gas(WAG) injection were based on less profitabl...
Abstract In this report, we perform a comparison of two gas condensate stabilization techniques: fractional distillation and multi-flash vaporization. Our prime objective is to compare relevant parameters .e.g. Reid vapor pressure (RVP) and associated costs in order to determine the more effective method for the stabilization of our gas condensate feed. The Aspen Plus software application suite was extensively used for the process design and simulation as well as the economic analysis for thi...