Analysis of Pressure Transient Data from Recording Downhole Gauge Case Study: Trofani Oilfield, Nigeria
Author : Imad Biboye Eseimokumoh and Omuso-Wilson Ereyananyo
Abstract :
Well testing is a productive way of monitoring reservoir performance and oil or gas well conditions. The transient behavior may be influenced to a significant extent by reservoir features such as faults, barriers and stratigraphic interface. Drillstem tests are normally conducted on exploration wells, and are generally the solution to investigating if a well has found a hydrocarbon reservoir that is commercial. Well F-6 is a newly completed well in trofani field, situated in the Niger delta region of Nigeria with unidentified formation properties and potential performance. This investigation reviews a simulation solution technique employing the KAPPA software ‘Ecrin v4.20.03’ to validate gauge data from Well F-6. The measured data of both an upper and lower recording gauge was compared and further analysis was conducted for the purpose of reservoir description. Actual real-time pressure data from recording down-hole gauge and flow-rate data were used in the pressure transient analysis to obtain reservoir parameters and assess well potentiality. An extremely high permeability of 7350md and a skin value of 15.3 was achieved at the end of the simulation process. This result indicates Well F-6 is of commercial quality and also denotes a damaged formation. Information obtained from this work can be employed to optimize development plans for this exploration well.
Keywords :
Well testing, reservoir performance, exploration well, drill stem test, simulation, reservoir description
