Prediction of Lithology using the Ratios of Compressional and Shear Wave Velocities and their Travel Times

ABSTRACT The ratio of compressional wave to shear wave velocities, and the ratio of their travel times are important parameters for interpretation of geophysical field data. Recent studies have emphasized the role played by pore geometry in controlling ⁄ . To infer lithologies, the ratios of ⁄ and were cross-plotted. ⁄ ranges from 0.0706 to 2.568 m/s and varies from 0.483 to 1.655 m/s. These variations were due soil composition, total porosity and pore geometry. The various lithologies inferred through this study conformed to those obtained from the field

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