Appraisal Well Positioning Using 3D Seismic and Well Data in the ‘TSL’ Field, Niger Delta.

Abstract

This study focused on the evaluation of ‘TSL’ Field by defining the structural geometry and reservoirs characteristics so as to identify the upside hydrocarbon potential within the field for increased hydrocarbon recovery. 3D seismic data and two well logs data were studied to determine the geophysical and petrophysical characteristics of the reservoirs. Structural configuration of the field was established by fault interpretation and horizon mapping of the top of identified reservoirs. Results showed that reservoirs penetrated by the ‘TSL’ Well are characterized by rollover anticline with two structural culminations (Eastern and Western). It revealed that Well TSL-01 penetrated the Western culmination at the flank while suggesting a likely exploratory potential at the Eastern culmination. Petrophysical results further suggest the presence of larger volumes of oil and gas down dip of U4 and U7 reservoirs situated between 6000 ft. and 8000ft. with appreciable porosity values range of 21% to 26%. Consequently, an appraisal well is proposed to investigate the hydrocarbon accumulation in these reservoirs at the up-dip positions for the purpose of increasing oil production. This study also proposed a well path trajectory that is made up of a vertical section of 2800 ftss, below this section is the North-East inclination of about 2.8 degrees at every 100 ft.