Revised Fault Efficiency and Migration Nose Model as Secondary Migration Pathway in the Klamono Area Based on New 3D Seismic Datasets

Abstract

Based on previous interpretation, migration pathway concept in the Salawati basin were controlled by several structural noses elongated from kitchen area in the Northwest part to local high area in the Southern to Eastern part of the Basin. Fault efficiency related to strike slip fault also played significant role as secondary migration pathway for carbonate carrier bed in the Salawati Basin. For example, Matoa and Walio Area have higher fault efficiency due to located in the NW-SE Cendarwasih Strike Slip Zone compare to Klamono Area, which is interpreted as Local high with N-S Normal fault based on 2D Seismic datasets. Regardless low Fault Efficiency in the Klamono Area, W-E Klamono Migration Nose is still being modeled. In 2017, Pertamina EP run 3D Seismic survey that covered Klamono and surrounding areas. Based on this new 3D seismic data, new NW-SE Strike Slip fault zone, which is defined as Klamassosa Fault, through Klalin, Arar and Klamono Area is well interpreted. The Klamasossa Fault have similar trend with Cendrawasih Fault which is NW-SE Trend. Based on Internal study, this fault trend is basically similar with Mesozoic graben system trend in this area, which is possibly reactivated during Late Miocene to Pliocene related to Sorong Fault Activation. The petroleum system implication of this new Klamassosa fault is level up the fault efficiency and act as new secondary migration pathway for oil and gas generation in this area. The new NW-SE migration nose model with high fault efficiency is proposed through Klalin Arar and Klamono areas, which is actually revised the previous model that stated 2 (two) W-E migration noses, Arar Nose and Klamono Nose. Hopefully, the new migration nose can give us better understanding about migration pathway in the Klamono and surrounding area in order to find new drillable prospects.

AAPG Datapages/Search and Discovery Article #90354 © 2019 AAPG Asia Pacific Technical Symposium, The Art of Hydrocarbon Prediction: Managing Uncertainties, Bogor, (Greater Jakarta), Indonesia, August 7-8, 2019