Alternate Method of Estimating Nigerian Hydrocarbon Reserves.

Reserves estimation of most oil fields is often performed through the Material Balance and Volumetric methods. Alternatively, a simple Estimation Model and Least Squares Regression may be useful or appropriate. This model used alongside with Linear Regression Analysis in this study gives improved estimates of the fields considered, hence can, be used in other Nigerian Fields with recent production history

Evaluation of Formation Damage and Assessment of Well Productivity of Oredo Field, Edo State, Nigeria

Formation damage canincurconsiderable cost for remediation and deferred production. Thorough understanding of the formation damage mechanisms, stringent measures for its control and prevention, and effective and efficient treatments are the keys for optimum production strategies for oil and gas fields. WELL 4X was investigated in this study to properly diagnosed and evaluate productivity in OREDO FIELD and Bottom Hole Pressure survey was used from Bottom Hole Pressure analysis in addition to the information of the well production history and reservoir data available to determine and assess the extent of the formation damage in the well. The WELL 4X was stimulated using Acid Foam Diversion Techniques to enhance reservoir productivity and increase economic operations. The stimulation job done on the well showed a peak increase of production from 850 bbl/day to 3200 b/d before it declined to 2150 bbl/day, and finally maintained an average stabilized rate of 2000 bbl/day. It has to be established that the treatment method on WELL 4X using Acid Foam Diversion Techniques and the Bottom Hole Pressure survey conducted on the WELL 4X in OREDO FIELD is found to be efficient in the determination and evaluation of formation damage

A comprehensive review of experimental studies of nanoparticles-stabilized foam for enhanced oil recovery

Nanoparticles-stabilized foam has recently attracted increasing attention for enhanced oil recovery (EOR) applications, largely due to the potentially high stability of these foams in the oil producing formations. There are several research articles on experimental studies of nanoparticles-stabilized foam for EOR applications. However, no previous attempts has been made to comprehensively review these existing literature. To fill this identified knowledge gap, we conducted the first comprehensive review on current status of static stability experiments, macroscopic and microscopic scale experimental studies of nanoparticles-stabilized foam for EOR applications. Influence of different critical parameters on the foam performance was reviewed. The results of the previous studies were discussed, challenges and conflicting findings were identified and directions for further studies were suggested. Experiments were conducted by the authors to complement some of the results in literature. From the reviewed literature, results of experimental studies indicated that the presence of nanoparticles at an appropriate concentration and favorable hydrophobicity will improved the foam static and dynamic stability in porous media. Several critical parameters like nanoparticles types, salinity, oil presence, temperature and pressure control the efficiency of nanoparticle-stabilized foam. Review of the experimental methods showed that the pore-scale mechanisms of nanoparticles-stabilized foam generation, stability, propagation, and residual oil mobilizations in porous media are not yet explicit due to limited studies. Nanoparticles-stabilized foams for EOR have not been implemented in the field due to limited understanding of influence of controlling parameters on foam performance and insufficient mechanistic and modelling studies. The remarkable potential of nanoparticles-stabilized foam to recover the trapped oil from the low permeability layer of the heterogeneous formation, due to the occurrence of foam diversion, and the use of fly-ash nanoparticles for EOR applications remains an interesting topics for future studies