Seismic Attribute Analysis for Detection of Highly Compartmentalised Reservoirs

Abstract

AbstractThis chapter focuses on the facies architecture of a Permian tight gas field in the Southern Permian Basin, East Frisia, Germany. To improve field development, 3D seismic, wireline and core data were compared with a reservoir analogue in the Panamint Valley, United States. Depositional environments of the Permian Upper Rotliegend II include perennial saline lakes, coastal parallel sand belts comprising wet, damp and dry sandflats and aeolian dunes with interdune deposits. Polygonal patterns at different scales were observed on seismic horizon slices in the reservoir intervals and the overlying Zechstein. Outlines of superordinate polygons coincide with interpreted faults. Similar polygonal networks were identified on modern dry lakes in the western United States. The kilometre long, metre deep fissures in the Panamint Valley, California, United States are interpreted to originate from synaeresis and tectonics. Subsequently, the fissures were filled with aeolian sediment. Vegetation along the lineaments indicates enhanced fluid circulation. Such fissure systems may serve as fault grain and impact reservoir quality in terms of hydraulic connectivity of reservoir compartments. For the Rotliegend reservoirs, porosity and permeability were inverted/decreased by cementation along migration pathways during diagenesis. Permeability barriers and compartmentalised reservoirs are a potential result of this development.KeywordsSalt DomeSeismic AttributeReservoir QualityAeolian DunePolygonal PatternThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.