ABSTRACT

In the exploration and production business, the challenge of effectively managing reservoirs and its associated uncertainties can be resolved using 3D modelling techniques in reservoir modelling. The subsurface is inherently complex and accompanied with a range of uncertainties. Connectivity between a reservoir and its juxtaposed or stratigraphic equivalent reservoirs can result in many undesired outcomes such as loss of reserve volumes especially when the reservoir is undeveloped. This Project aim to use an integrated approach to characterize the E5000C reservoir of Kalili field. The fields’ depositional environment is interpreted as fluvially-influenced shallow marine environment. The reservoir is mainly stack of channel bodies that contains shoreface deposit. The procedure involved using available 3-D seismic volume and well log data to correlate the stratigraphic equivalents of KALI-001 and KALI-014st wells in the KALI-E5000C reservoir. Two well- to- seismic ties were carried out using the checkshots data from two of the wells (KALI-006, KALI-007). This was thereafter used to relate the horizon tops identified in a well with specific reflections on the 3-D seismic section. The horizons corresponding to the tops of the reservoirs, E5000C and several faults were mapped across the seismic section and used to generate time structure map. This in turn was used to generate depth structure map by developing a velocity (V_omap_K) model that converted time to its corresponding depth. From the map, the field is an elongated roll over anticlinal structure that closes to the footwall. The Kalili field is characterized by K-type faulting. On a mega-scale, the field is seen as stepped-faulted anticlines. The synthetic fault separating the main Kalili field from its neighbouring block dies out in a north-western direction close to KALI-007. From the result of the integrated characterization analysis carried out, the fault blocks in the KALILI E5000C reservoir are well compartmentalized.