ABSTRACT Pipes that make up oil and gas wells are not vertical but could be inclined at any angle between vertical and the horizontal which is a significant technology of modern drillingExperimental data on time varying liquid holdup for and pipe inclination angles were analyzed and interpreted. Parameters such as void fraction, slug frequency, lengths of liquid slug, Taylor bubble and slug unit, structure velocity and pressure drop were calculated from the experimental data. It was observed...
ABSTRACT Upstream petroleum industry remains one of the most prolific industries in terms of technology and risk capital transfer. Consequently, governments all over the world try to formulate political as well as economic structures that could favourably attract investments to their petroleum provinces. These structures are spelt out in their petroleum fiscal systems. A good fiscal system tends to find a common ground for both government and the contractor by way of optimizing both efforts ...
ABSTRACT Down-hole temperature and pressure data are important information needed to understand flowing conditions and production optimization. For example, knowing the wellbore temperature profile is useful in predicting the wax formation in the tubing, which is important in flow assurance. While gas production usually causes a temperature decrease due to Joule Thomson effect, water entry results in warming of the wellbore. Warmer water entry is as a result of inflow from a warmer aquifer z...
ABSTRACT The purpose of this study is to develop an innovative technique for optimized gas lift design for marginal fields of the Niger Delta. This study used well data from mature fields located southwest of the Niger Delta to develop optimized gas lift design techniques using the single point continuous gas lift approach. A total of fifty-nine (59) wells from the fields were selected for preliminary screening as potential gas lift candidates. The screening process involved; reviewing w...
ABSTRACT In this study, we present a new analytical solution method that accurately corrects the non-isothermal effects from injection and fall-off tests. The derivative of these solutions is applied to develop the Tiab's Direct Synthesis (TDS) technique. New equations have been developed to determine the different reservoir parameters from pressure injection/fall-off test data. The flow regimes that can occur during an injection test or fall-off test are obtained by separating the different...
ABSTRACT Reservoir characterization has long been identified as the ultimate process employed in detailed description of a reservoir in order to properly book the reserve and also to optimally place the wells and drain the reservoir. This report details the workflow of reservoir „X‟ study, right from 3D seismic interpretation to delivery of a 3D static model of the reservoir by fully integrating all the available data in the field: 3D seismic data, well logs, deviation data, core data, c...
ABSTRACT Simplified predictive numerical models have been developed for diffusion rate of crude oil spilled into Niger Delta soils. The proposed model equations were developed using Fourier transformation, and Green’s function. The induction principles as well as the indicial matrix method of dimensional analysis were adopted in determining the functional parameters that could possibly influence their diffusion rates. These mathematical models correctly predict one – dimensional ...
ABSTRACT A data-driven approach to solving the problem of excess water production was the focus of this study. In this research, several reservoir models were simulated for 26 years, and data obtained after simulation was used to develop two artificial neural network models to predict the water cut for various producers. The first 22 years of data obtained from simulation was used to train the first neural network model, and the model was then used to forecast the water cut for the last four...
ABSTRACT New Biodegradable drilling fluids were developed using Brachystegia eurycoma (achi), Detarium microcarpum (ofo) and Pleurotus (osu). The drilling properties such as yield point, apparent viscosity, low shear rate yield point and fluid loss were determined.The field polymer muds that are currently in use namely; PAC-R and PAC-L were formulated and used as control samples to the new proposed product. Herschel –Buckley model was used to obtain the yield stress. Cutting transport rat...
ABSTRACT Waterflooding is the most dominant secondary oil recovery method and its popularity is mainly due to the general availability of water, the relative ease of injecting water, the ability of water to spread easily through an oil-bearing formation and the efficiency of water in displacing oil. However, waterflooding is not without its challenges. Factors such as reservoir heterogeneity, lateral and vertical variations in permeability and presence of discontinuities greatly affect this ...
ABSTRACT Nigeria is endowed with huge proven gas reserves estimated to be 184 trillion cubic feet (Tcf). It ranks as the 7th holder of natural gas reserves in the world, and the largest in Africa. Nigeria also flares more natural gas than any other country; it accounts for 12.5% of the world‟s annual gas flared and it wastes $2.0 billion annually by flaring gas associated with crude oil extraction. There is crucial need to monetize the gas reserves, reduce gas flaring and its environmental...
ABSTRACT Analytical models can be valuable tools to investigate solute transport in porous media. The application of analytical solutions is limited by the perception that they are too cumbersome to derive while their implementation rests on assumptions that are too restrictive. This research is aimed at understanding the effect of linear drift on radial transport of tracer in porous media. It provides an analytical Solution that expresses the Concentration Distribution around the source of ...
ABSTRACT Optimizing the placement of new wells and well spacing is a vital issue in oil field development. Drilling infill wells is one way to maximize the recovery of oil from reservoirs. The problem of infill well placement is challenging because many different well scenarios must be evaluated when undertaking the optimization program and very often, the variables that affect reservoir performance are nonlinearly correlated with some degree of uncertainty. Using computational algorithms ha...
Abstract In the estimation of most reservoir parameters in well test, the reservoir is assumed to be isothermal which is practically not true due to the fact that there are heat sources due to friction in the wellbore, works done by the drill bit and in thermal recovery. Although, this temperature change is small, it can serve other beneficial purposes in the reservoir and wellbore. The research work used the temperature change to estimate permeability, skin factor and initial temperature of...
ABSTRACT Slug flow along slightly inclined horizontal pipes is a major problem in gas-liquid transportation, it is very pronounced in chemical, oil and gas processing industries. In reality, there is no absolute horizontal pipe due to the undulating nature/ Topography of the laid pipe terrains. Very little research has been done in this area because of lack of experimental data. This work is proposed to use raw experimental data from 10 degrees inclined horizontal pipe to analyze the flow pr...