2022 - AAPG Carbonate Sequences and Reservoirs Conference
Nick Foote, Daniel Clay and Meriem Bertouche - The use of borehole image interpretation in characterising cement nodules and associated nodule-bound micro-fracture distribution in the Mauddud Formation, North Kuwait
The Lower Cretaceous Mauddud Formation in North Kuwait is a limestone-dominated transgressive-regressive sequence of about 380ft (116m) thick. As a key reservoir in North Kuwait, it has been extensively studied with permeability heterogeneity caused by diagenesis a concern for production. How cement is distributed through the reservoir from nodules to cement cycle tops, together with how fractures interact with the cements, has been the focus of previous studies (Dewever et al., 2020). However, minor variations in wireline log response across the carbonate succession makes extrapolating nodule distribution from cored to uncored intervals challenging with fractures undeterminable altogether. This study utilises BHI across 50 wells to characterise nodules and cements where core is absent to better understand these heterogeneities. This can be used to support the reservoir connectivity understanding and facilitate full field development planning.
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