ABSTRACT Filtrate losses and filter cake properties of drilling fluids are of concern in the oil industry because they alter near well bore permeability and can reduce well productivity. Therefore, it is desirable to accurately characterize filtration process during oil well drilling. A mathematical model for analyzing mud filtration in deviated wells was developed in this study. The model determined solid pressure distribution within cake, cake thickness, cumulative volume of filtrate and e...
ABSTRACT Contamination of oilfield cement slurries by drilling fluids is one of the causes of cement job failures and it results in expensive remedial actions. While the general adverse effects of Pseudo Oil Base Mud (POBM) contamination of cement slurries are known, little has been published on the actual effects of POBM on specific slurry properties. The effect of POBM on the filtration losses in oil well cement slurries was investigated. POBM contaminated slurries at varying contamination ...
ABSTRACT Water production during petroleum production often contain chemical, oils and sometimes naturally occurring radioactive materials, which could harm the environment.
ABSTRACT Determining the filtration properties of a mud system requires that experiments be run for both the standard API and the high temperature pressure tests at intervals throughout the duration of drilling an oil well.
ABSTRACT Cubic equations of state are commonly used for predicting the properties of reservoir fluids.' They are simple to use and require few parameters during computations. They have also been found to produce results that are comparable to the more rigorous multi-parameter equations. However, they are still regarded by many as mere comprehensive correlations of fluid properties because of a number of weaknesses and /imitations. This work addresses two weaknesses of cubic equations of state...
ABSTRACT Direct viscosity measurements are often expensive or unavailable. Therefore, empirical correlations are often used for predicting the viscosity of crude oils. However, several published correlations are either too simplistic or too complex for routine operational use, Many of the common correlations in use were developed using data from other regions of the world, Empirical correlations for predicting the viscosity of light crude oils in the Niger Delta have been presented in this pa...
Abstract Surface tension is an important property that affects the behavior and characteristics of reservoir fluids.. It impacts the capillary pressure and fluid dynamics in porous media. This study, investigated the surface tension of Contaminated Niger Delta crude oil at varying temperatures. Laboratory tests were carried out on samples from four fields in the Niger Delta using DuNouy Tensiometer under standard conditions. The results show that for Niger Delta Crudes of gravity between 25 ...
ABSTRACT This study investigated the relationship between velocity of sound and properties of natural gases under different equations of state and the operational implications on acoustic gas metering. The velocity of sound was related to the thermodynamic properties of natural gas using both the Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR) equations of state and applied to 5 wet and 5 dry natural gas samples from the Niger Delta at different conditions of temperature and pressure. Predic...
ABSTRACT Sand production, which is predominant in the Niger Delta, is a growing concern in the petroleum industry because of the associated technical, operational and economic challenges. The development of sanding predictive tools and effective management strategies has received much attention in literature. However, most of the published theoretical models have been validated with laboratory or data obtained from petroleum provinces other than the Niger Delta. This work developed a simple ...
ABSTRACT Sand produced along with oil and gas causes operational, safety, environmental and severe economic challenges. The cost of installing sand control facilities which may not really be needed could also be substantial. Therefore, determining the critical flow rate for the onset of sand production is very important. There are several published studies on sanding in vertical wells, but few on horizontal wells, which have now become very prominent in the industry. The aim of this study was...
ABSTRACT Qualitative description of reservoir fluids is normally based on such parameters as saturation pressure, gas in solution, viscosity and density. Most Engineers ignore compositional data unless when phase behavior predictions or compositional simulation are to be undertaken. This work describes a simple, quick method of qualitative reservoir crude assessment, using the well known Type Curve matching techniques with fluid compositional data. The method is demonstrated for some Niger De...
ABSTRACT Accurate molecular weights of pure compounds are available and can be readily obtained in the literature. However. those of binary and multi-component mixtures are not readily available and are usually obtained from pure components by applying mixing rules. which may not be very accurate. The molecular weights of n-Nonane+n-Tetradecane. nc;exane+n-Nonane. n-Hexane+Toluene, Toluene+n-Tetradecane and some petroleum liquids were experimental I: determined using a cryoscope. The results...
In order to monitor and control the properties of drilling fluids, measurements are routinely made at the surface. However. these surface measurements may not be representative of down-hole properties where the desired functions of hole cleaning and other related issues are critical to the success of the drilling operations. Consequently, it is important to make necessary adjustments of the fluid properties obtained at ambient conditions to give estimate of properties at high tempera...
In low oil price regimes, oil and gas companies explores several options to remain profitable in the short run. The traditional response has been to shelf all projects until the price of oil rebound or carryout workover operations, but this might not be the best option for these companies. This study discussed how Shell Petroleum Development Company significantly reduced the cost of its workover operations using effective planning and project management. This study then showed how the GE/McKi...
The goals of this research are to determine how the Nigeria oil and gas industry has impacted the actualization of the sustainable development goals and how the Nigeria oil and gas industry overcome its present challenges to achieve sustainability. This paper found out that Nigeria oil and gas industry has not significantly contributed to the actualization of the sustainable development goals and Nigeria is at danger of not meeting the 2030 deadline for their actualization. In fact, the oil a...