Using seismic and well data to constrain hydrocarbon trap potential of offshore Lamu Basin, Kenya

作     者：G.A.Osukuku O.O.Osinowo W.A.Sonibare E.W.Makhanu A.W.Masinde 

作者机构：Pan African University for Life and Earth Sciences Institute(Including Health andAgriculture)PAULESIUniversity of IbadanNigeria Schlumberger Offshore Service LimitedSouth Africa National Oil Corporation of Kenya(NOCK)Kenya 

出 版 物：《能源地球科学(英文)》 (Energy Geoscience)

年 卷 期：2023年第4卷第3期

页      面：296-310页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0709[理学-地质学] 0819[工学-矿业工程] 081803[工学-地质工程] 0707[理学-海洋科学] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 

基　　金：National Oil Corporation of Kenya African Union Commission, AUC 

主　　题：Larnu Basin Davie-Walu trans forrnation Carbanate reef structure Stratigraphic framnewark Structural frameworlk BiostratigTaphy 

摘      要：Structural analysis of seismic data, combined with well data, provides information for hydrocarbon exploration in a prospective basin. These techniques have been employed in the offshore Lamu Basin to characterize structural and stratigraphic setting of carbonate reefs and assess structural deformation and its effect on trapping mechanisms in the offshore basin. Structural interpretation was based on seismic and well data. A combination of microfossil, nannofossil and palynomorph data provided broad age-control for the stratigraphic interpretations. Seismic amplitude brightening attribute was used for tracing structural continuity. Faulted anticlinal traps were formed in the Upper Cretaceous and Tertiary periods. There are inversion features with recent extensional faulting. Favourable structural traps are in the near coastal region. The carbonate reefs in the offshore basin are interpreted from the Early Paleocene to Miocene periods. These reefs formed in the near coastal region, are likely to be quality traps/reservoirs for hydrocarbon accumulation. Five main structures are identified from the depth seismic maps for the Early Paleocene, Late Paleocene and Early Miocene. The reef front may have subsided early, the overlying shales offering the sealing mechanisms. The Davie-Walu transformation was likely to affect the trapping mechanism in the central and southern regions of offshore Lamu Basin. The study provides better understanding of the carbonate reefs’ hydrocarbon potential and trapping mechanisms in the offshore basin.