Hydrocarbon play assessment of the sapele field, for moveable hydrocarbon indices, onshore niger delta.

Abstract

A field's hydrocarbon evaluation takes into account the productivity of the hydrocarbon reservoir bearing unit. It basically includes a thorough examination of the geological interpretation of petrophysical parameter indices deduced from well logs. This study uses MHI and proven integrated methodologies including well logs analysis, petrophysical computing, to evaluate the Sapele-field with the objective of establishing its fluid types and hydrocarbon saturations. Three formations across eight wells in the field were delineated using the quick look analysis approach at low gamma ray intervals corresponding to high resistivity kicks. Correlation of the wells was conducted to specifically check the continuity in stratigraphy of the formations across the wells. Petrophysical parameters evaluation were conducted to qualitatively access the formations across the eight wells. Porosity, permeability, water saturation, Net pay thickness, water saturation and MHI were calculated as first and second degrees petrophysical parameters. Results revealed a characteristic thin beddings in the formation across the eight wells, with the same range of net pay thickness. MHI results (0.24-0.61) revealed the formations hydrocarbons are moveable during invasion and this is in agreement with the formations tendencies to accommodate and transmit hydrocarbon (0.14-0.24 porosities and over 250mD) with good hydrocarbon saturations of over 55%. This study has shown that the Sapele field is viable with good hydrocarbon mobility tendency during invasion.