Quantitative Characterization of Connectivity and Conductivity of Sandstone Carriers during Secondary Petroleum Migration, Applied to the Third Member of Eocene Shahejie Formation, Dongying Depression, Eastern China
Studies on migration pathways remain qualitative, albeit extensive quantification of migration forcing. In this study, hydrocarbon carriers are defined as carrier units and their corresponding carrier beds for the Third Member of Eocene Shahejie Formation in the Dongying Depression, Bohai Bay Basin, eastern China, on the basis of their lithofacies and physical properties, spatial relationships, and data availability; secondary migration conduits are then quantified. A carrier unit is defined as a stratigraphic unit that contains microscopically porous and permeable carrier beds and is covered by regional seals. The carrier beds are macroscopically and physically connected to each other within a carrier unit and are hydrodynamically connected during secondary migration. A method of quantifying sandstone carrier units using common physical properties is developed. First, a carrier unit containing potential carrier beds is identified on the basis of lithofacies and their lateral changes. Second, physical connectivity of sandstone carrier beds is assessed on the basis of percolation theory. Third, the hydrodynamic connectivity of a sandstone carrier unit is analyzed using effective parameters that may reflect the hydraulic circulation in the carrier unit. Last, the conductivity of a sandstone carrier bed is quantitatively characterized using appropriate physical property parameters. The results for sandstone carrier units in the Third Member of the Shahejie Formation are used in numerical models addressing Pleistocene secondary migration. The model results explain the discovered accumulation and hydrocarbon shows well; and the model predictions on exploration targets have been confirmed by drilling.
Y. Lei et al., "Quantitative Characterization of Connectivity and Conductivity of Sandstone Carriers during Secondary Petroleum Migration, Applied to the Third Member of Eocene Shahejie Formation, Dongying Depression, Eastern China," Marine and Petroleum Geology, vol. 51, pp. 268-285, Elsevier B.V., Mar 2014.
The definitive version is available at https://doi.org/10.1016/j.marpetgeo.2013.12.022
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Carrier Unit; Connectivity; Dongying Depression; Petroleum Migration; Quantitative Characterization; Fluid Dynamics; Hydrocarbons; Physical Properties; Stratigraphy; Sandstone; Eocene; Hydrocarbon Migration; Hydrocarbon Reservoir; Lithofacies; Numerical Model; Bohai Bay; China; Dongying Depression; Shandong
International Standard Serial Number (ISSN)
Article - Journal
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