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Hydrocarbon Investigation Using Petrophysical Parameters And Core Analysis (A Case Study of Umoro Field)
Abstract
In the last five years, there have been rapid declines in the reservoir production rate of Umoro field. Against this backdrop, activation of the reservoir is expedient so as to enhance its performance. To this end, petrophysical logging and core analysis were carried out to evaluate the Geo - Reservoir conditions. Of the six wells drilled in this oil field, two wells
were used to characterize the field. Our investigation reveals a fairly good porosity across the two reservoirs, average water saturation and a high net to gross hydrocarbon ratio (NTG). The average pay porosity was found to be 0.36 in the oil zone and 0.299 in the gas zone. Hydrocarbon saturation was also found to be 0.87 and net to gross of 0.33 (that is the ratio of gross volume to net volume of hydrocarbon). Lithologies identified were sand and shale sequence and the fluids identified were gas and oil. The oil water contact, inserted on the structural map identified the enclosure of the hydrocarbon bearing sand from which the value of the discovery was estimated by calculating stock tank oil initially in place, (STOIP and the recoverable reserves (N).
were used to characterize the field. Our investigation reveals a fairly good porosity across the two reservoirs, average water saturation and a high net to gross hydrocarbon ratio (NTG). The average pay porosity was found to be 0.36 in the oil zone and 0.299 in the gas zone. Hydrocarbon saturation was also found to be 0.87 and net to gross of 0.33 (that is the ratio of gross volume to net volume of hydrocarbon). Lithologies identified were sand and shale sequence and the fluids identified were gas and oil. The oil water contact, inserted on the structural map identified the enclosure of the hydrocarbon bearing sand from which the value of the discovery was estimated by calculating stock tank oil initially in place, (STOIP and the recoverable reserves (N).
