Research Papers/Topics in Petroleum Engineering

A Correlation For Predicting The Viscosity Of Nigerian Crude Oils

AUST.RACTAn -elnpTricaZ'-eq"uarlon that could be used forpredicting the viscosity of Nigerian crudes ispresented in this paper.The correlation uses oil specific gravity as the maincorrelating parameter, and also incorporates theeffects of reservoir pressure, temperature and oilformation volume factor. 'i 'i _. .Dcua from well over 400 samples of Nigerian crudeswae used for developing the correlation, with mostsamples however, from reservoirs alar abovesaturation pressure. The results show how...

Carbontl V) oxide Capture anti Sequestration in Nigeria: Prospects and Challenges

AbstractThe capture and storage 0/ carbo II dioxide (eeS)produced durtng the combusuon of fossil fuels 110\1·offers one option/or attaming large scale reductions inthe enusstons of greenhouse gases and thus. promote aclean environment. It IS 1101l' becoming clear that eestechnologies could promote the use or consumption offossilfuels than otherwise previouslv thought.Tills paper presents an OI'er\,le\l" of the techniquesInvolved 111 the capture and sequestration ofcarbondioxideic'Oi). The op...

Improved Characterization of Heptanes-Plus Fractions Of Light Crudes

AbstractHeptanes plus fractions have strong effects on thephysical properties and phase behaviour of petroleumfluids. It is therefore very important to properlycharacterize plus fractions. A step to achievingimproved characterization is to obtain more realisticmolecular weights. Most of the current methods ofheptanes plus characterization assume their molecularweights are accurate. However, what is commonlymeasured in the laboratory is the molecular weight ofthe complete fluid; the molecular ...

Improved Reservoir Description Using Surface Oil Viscosity Data

AbstractSubsurface oil viscosity data are usually 110t readilyavailable for most reservoirs, as they are expensive toacquire. On the other hand, surface oil viscosity isroutinely measured and therefore readily available forall producing wells. A method has been developed forconverting the surface viscosity to reservoir viscositydata, using SPDC's "Field A" as a case study.Surface oil viscosity data from all producing wells in"Field A" where collected from SPDC-WestProduction Chemistry laborat...

Sand Failure Mechanism and Sanding Parameters in Niger Delta Oil Reservoirs

ABSTRACTSand production is a major issue during oil and gas production from unconsolidated reservoirs. In predicting theonset of sand production. it is important to accurately determine the failure mechanism and the contributingparameters. The aim of this study wa to determine sand failure mechanism in the Niger-Delta. identify themajor contributing parameters and evaluate their effects on sanding.Completion and production data from 78 strings completed on 22 reservoirs in a Niger Delta oil F...

Effects Of Liquid Holdup On Hydrocarbon Production In Tapered Tubing String Using Niger Delta Fluid Properties

Abstract Effects of liquid holdup on hydrocarbon production in tapered tubing string using Niger Delta fluid properties was undertaken in this work. Oil reservoir fluids flow to the surface as a multicomponent fluid in pipes during production. Multiphase flow occurs due to the density of different phases involved in reservoir fluid and each fluid phase flow at different velocity. In this study, analytically developed equations and existing fluid correlations were used for determinat...

Critical Evaluation Of The Correlations Used For Estimating Geomechanical Properties For The Niger Delta

ABSTRACT The study area which is the Niger Delta Province is predominantly an unconsolidated sandstone terrain, the sand grains are friable suggesting the expectation of some geomechanical problems while developing hydrocarbon reserves in such terrain. In this study, the geomechanical property used to measure rock strength (i.e. unconfined compressive strength) was evaluated by using three principal methods. Critical drawdown pressure (CDP) and sand production rate were also evaluated. ...

Mechanistic Models For Predicting Sand Production: A Case Study Of Niger Delta Wells

ABSTRACT Niger Delta Province is predominantly a friable, unconsolidated sandstone terrain suggesting the expectation of sand production while developing hydrocarbon reserves in such terrain. In this study, a simple and easy-to-use mechanistic model for predicting sand production rate (SPR) in Niger-Delta wells was developed by coupling the static sanding criteria and the dynamic requirement for fluidization of the produced sand. A generic mechanistic model that incorporates the concept...

Pressure Transient Analysis Of Hydraulically Fractured Wells In Multilayered Reservoirs

ABSTRACT New equations for bilinear, formation linear and pseudo-radial flow regimes in an infinite commingled fractured multilayered reservoir have been developed. The equations have been extended to Tiab’s Direct Synthesis Technique that makes it easy to estimate the individual layer properties without type curve matching. Regardless of the flow regime, the rate normalized pressure derivative with respect to the appropriate time function has been found analytically to be constant, w...

Techno-Economic Feasibility Of Ethane Based Enhanced Oil Recovery In Nigeria (Case Study: Niger Delta)

ABSTRACTIncreasing oil recovery has been one of the issues enlisted for attention in oil producing countries around the world for past decades. So many forms of oil recovery techniques have been considered; infill drilling of new wells, production and injection control, pressure control, water flooding and other methods of Enhanced Oil Recovery (EOR), most of which have been implemented in other parts of the world. Nigeria as an oil producing country has not taken interest in EOR techniq...

Identification Of Closed Perforations And Damaged Sections Of Horizontal Wells In Naturally Fractured Reservoirs, Using Well Test Analysis

ABSTRACT The use of horizontal wells with zonal isolations is a common completion practice in the oil and gas industry to check for very significant production challenges such as wellbore damage/skin, early water breakthrough and gas coning, rapid pressure depletion, dampened recovery efficiency and overall well productivity. Notwithstanding, the use of zonal isolators invariably alters the transient pressure response of horizontal wells. In this research, the use of well test analysis h...

Pressure Transient Analysis Of Bingham Fluids Using Tiab’s Direct Synthesis Approach

ABSTRACT This study investigated transient flow response of heavy oil that exhibit Bingham fluid characteristics. Four wellbore conditions in naturally fractured reservoirs were considered which include horizontal well, hydraulically fractured well, partially penetrating and fully penetrating vertical wells. Physical models were established and corresponding mathematical models were presented taking cognisance of minimum threshold pressure,𝜆𝐵. The model was solved analytically by ...

Optimizing Field Performance Using Injection Efficiency From Streamline-Based Workflow

ABSTRACT Waterflooding is one of the most common secondary recovery mechanisms available for improving oil recovery from known accumulations. Due to the limitation of available water for injection, there's a need to optimize the use of this limited resource. To this end, a methodology has been developed to allocate injection water to more efficient wells than to those of lower efficiency. Streamline simulation is a complementary tool to conventional finite difference simulation, provid...

Effect Of Pipe Inclination Angle On Gas–Liquid Flow Using Electrical Capacitance Tomography (Ect) Data

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 obse...

Implications Of Production Decline Patterns, Cost Depreciation Methods And Fiscal Regimes On Offshore Profitability In Nigeria

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 effo...


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