IOSR-JAGG   Volume-8 ~ Issue-3 ~ may – jun. 2020

Abstract: The current study involves the analysis and evaluation of the 38 bottled water samples being sold in 0.75, 1.5 and 5 liters capacity containers across Ibb city, Yemen. Water samples were evaluated for physico-chemical and biological characteristics to assess the suitability for drinking purpose. The evaluated physical parameters consist of net weight of the samples, seal of the bottle caps, taste and odor. The collected samples were analyzed for pH, TDS and TH as well as the determination of the concentration of Mg, Cu, Zn, Fe, Cd, Mn, Ni and Cr elements and SO4. The microbial analysis was also conducted in terms of most probable number (MPN) of total coliforms in water samples. The results showed that most of the water samples are slightly alkaline in nature. The packaged.....

Key words: Packaged water. Physico-chemical parameters. E-coli. Correlation matrix. Ibb city. Yemen.

Abstract: Background:The relevance of nannofossils is becoming increasingly important not only because of the advantage of its size, the limited stratigraphic range of many of its species with resolution to some thousands of years, but also its cheap and speedy processing technique that yields rapid result where real time age determination is required especially at this time of paradigm shift of exploration to the deep offshore areas in Niger delta. Generally, published literature on calcareous nannofossil is scarce in Niger Delta, this is due to the obvious fact that calcareous nannofossil studies are undertaken by the oil and gas industry who deems the information as proprietary, hence this study is undertaken to analyze well X-1, for calcareous nannofossil distribution and use it to establish the biozonation......

Key Word: Nannofossil; Age,Environment;Biozonation;Miocene, Offshore, Niger Delta

Abstract: This study presents the findings on how production optimization in Alwyn-North Field can be enhanced by well placement modeling. To carry out this research, knowledge of Stanford Geomodeling Software®(SGeMs), MATLAB® and Eclipse 100® were employed. For this work, great caution is taken in the modeling phase as well locations will beproposed based on this. The 3D reservoir geologic model is built based on the data from the seismic surveys and analysis from nearby wellsusing MATLAB®. The model shows the pressure zones, structural traps and nine (9) possible productionwell placement locations for vertical wells. Eclipse100® reservoir simulator aided the simulation of the field oil efficiency, gas production rate, oil production rate, cumulative production......

Key Word: Reservoir, Drilling, Geomodeling, Safety, Well placement, Simulation

Abstract: The lower member of the Um Bogma Formation at Wadi El Seih area composed mainly of ferruginous siltstones. Most of uranium occurrences located in the ferruginous siltstones. The field observation reveal that the factors affected the localization of U at the study area are topography, structure and lithology. The ferruginous siltstones show high enrichment of Y, Zn, V, Sr, U and Ba. Also, the rare earth elements (REE) analyses reveal that the studied siltstones have high concentrations of Dy, Ce, Nd, Er and Gd.SEM and EDX investigations reveal that iron oxides play an important role in the adsorption and precipitation of trace and rare earth elements. The high radioactivity of the studied siltstones is related to the presence of uranium minerals like uranophane, meta-autunite , sklodowskite and other associated uranium bearing minerals like xenotime and zircon. Gold is detected in the studied ferruginous siltstones of the lower member of Um Bogma Formation (reach up to 1.04 ppm).The presences of iron minerals are playing an important factor in capturing uranium and other elements.

Key Word: uranium, gold, Um Bogma

Abstract: ： uppose that in this year's CBA league, there are 14 teams in the regular season and playoffs, in which each game must have a victory and defeat, and each team number is fixed. The comprehensive scoring data of each team's on-the-spot performance in each ball game is calculated from the actual participating teams, and
each team has about 100 historical scoring data. This article discusses the CBA league title competition based on the comprehensive score data of each team's on-the-spot performance in each ball game. For each team's probability of winning, establish an appropriate mathematical model to analyze and solve. First of all, we adopted the analytic hierarchy process to establish the model, and established three levels, namely the target level, the criterion level and the plan level. According to the data provided by the title, we
preprocessed the........

Key words：AHP,MATLAB,Pairwise comparison matrix,Weights.

Abstract: Cohesive geophysical medium, namely; magnetic and electrical resistivity methods, were applied along with a geochemical method – atomic absorption spectrophotometry (AAS), to investigate the effect of solid (domestic) wastes dumpsite by means of groundwater contamination on Nassarawo-Demsa Area. The aeromagnetic data used in the present study were extracted from sheet 196 (Numan) which was obtained as part of Nigeria nationwide aeromagnetic survey conducted by the National Geological Survey Agency (NGSA), Abuja. The data were acquired on an average flight elevation of about 80 m in a series of NE – SE flight lines, with a spacing of 500 m. The.....

Key Word: Solid waste dumpsite; Magnetic method; Electrical resistivity;Dipole-dipole; Leachate; Numan

Abstract: This paper presents the application of comprehensive geophysical methods to the exploration of the coalbed floor limestone via a case study in the Datong coalfield. 3D Seismic Technology is applied to effectively detect the water-rich area of underground karst structure and ensure the safety of coal mine production. In the Carboniferous coal seam of Datong coalfield, the comprehensive geophysical methods,including surface 3D Seismic and CSAMT exploration, can effectively detect the water rich area of underground karst structure, effectively guide the safe production of coal mine, and has the prospect of popularization and application. The methods can also provide a reference for similar coal mines in China and other countries.

Keywords: Geophysical methods; Underground limestone Karst; Carboniferous coalbed; 3D seismic technology

Abstract: The Niger Delta Basin is an extensional rift basin located in the Niger Delta and the Gulf of Guinea on the passive continental margin near the western coast of Nigeria. Lithofacies analysis was carried out in order to ascertain the environment of deposition of the conglomeritic deposits. Ten lithofacies were delineated in the northeastern part of the Niger Delta Basin and grouped into three facies associations: facies association 1 comprising matrix-supported conglomerate (Cm), clast-supported conglomerate (Cc), massive sandstone (Sm), planar cross-stratified sandstone (Sc), trough cross-stratified sandstone (Tc) and horizontally stratified sandstone (Sp); facies association 2 comprising claystone (Ct) and variegated mudstone (M); facies association 3 comprising grey-green shale (Sh) and black shale (Sb). Facies association 1 was deposited in a braided fluvial channel because of......

Keywords: Facies analysis, conglomerate, depositional environment, Niger Delta, progradation

Abstract: Wirelinelog was used in the analysis of the reservoir properties of "Manin" Marginal field, onshore depobelt, Niger Delta. The study essentially focused on determining properties such as lithology, depositional environments and petrophysical properties such as shale volume, porosity (Φ), net pay thickness, net to gross ratio and water saturation. Wireline data of four wells namely well 4, well 7, well 5 and well 11 were evaluated by identifying hydrocarbon bearing sands in each of the four wells and then estimating the petrophysical properties for these reservoirs. The evaluated reservoir sand units mapped were laterally continuous with gamma ray log signatures that are basically cylindrical with a fining upward sequence interpreted as a fluvial dominated channel. The environment of deposition was inferred to be between the foreshores to lower shoreface with reservoirs typically showing.....

Keywords: Niger Delta, Petrophysical properties, Reservoirs, Porosity, Environment of Deposition

Abstract: Aquifer performance test was carried out for six borehole within Maiha, Mubi North andMubi-south Local government area. The Boreholes were tested using a constant rate and recovery Phase so as to ascertain the recharge rate of each Borehole. The depth of each borehole tested are 24m, 25.43m, 40.3m, 58.5m, 61.5m, and 63.2m. Their discharge rate are 0.27 l/s, 0.43 l/s,0.46 l/s, 0.46l/s, 0.8l/s and 1.05l/s. Physiochemical parameters of the water measured in this boreholes are within the permissible limit of the World Health Organization(WHO). Based on the pumping test these wells were installed at recommended depths and pumps they have good yield and are currently productive

Keywords: Pumping test, Borehole, recharge, Aquifer, recovery phase and Ground water

Abstract: Interpretation of high resolution aeromagnetic data was used to carry out to determine the petroleum potential of Matto and environs Northcentral Nigerian, Using Source Parameter Imaging (SPI).Oasis Montaj software was used to carry out the analysis. From the contour residual contour map the magnetic signatures over the study area consist of short, medium and long magnetic anomalies. The short and medium magnetic anomalies are as a result of adjourning basement terrain. While the long wavelength magnetic anomalies at the central part of the study area, is as a result of the deep basement under thick sedimentary cover. The result obtained from the analysis of SPI Profile indicates two source depths. The shallow sources and the deeper sources. From profile 1 the depth to magnetic sources (sedimentary thickness) are shallow and deep, the shallow sources varies from 10 to.......

Keywords: Matto, Benue rift, Source Parameter imaging, Profiles, Petroleum and North central

Abstract: Background:The Mediterranean Basin is an emerginggiantgas province with provenreserves. Provenreservoirsvary in agefromOligocene through Pleistocene. Hence, to verify the actualreservoir markers (depthdomain) over seismic data (time domain), a good well to seismictie (Synthetics) shouldbeapplied over the whole vertical section of the well. Vertical Seismic Profile (VSP) is useful in the well tie process, because it is providing a link between wells and seismic data at the correct scale. High density sampling gives good control on the time depth relation (TDR), which also called checkshot (CS) data. Checkshot data considered as the key for calibrating the well Markers (Depth domain) with the Seismic Markers (Time domain). Materials and Methods: This work deals.....

Keywords: Checkshot Data, Vertical Seismic Profile (VSP), Velocity Analysis, Well to Seismic Tie data enhancement.