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Lacustrine seashore ridge reservoirs have develop into vital targets for oil exploration due to their proximity to grease sources and excessive reservoir porosity and permeability. Nevertheless, the sedimentary structure and hydrodynamic processes concerned of their formation are nonetheless unclear, particularly for the embayed seashores.
Researchers from the Northwest Institute of Eco-Surroundings and Assets (NIEER) of the Chinese language Academy of Sciences (CAS) have investigated the sedimentary structure and geomorphology of an embayed seashore on the southern of Qinghai Lake, northwest China, primarily based on floor penetrating radar, trenches, and fashionable seashore remark. The examine was printed in Journal of Paleolimnology on July 6.
They discovered that the deposits on the embayed seashores consisted of three essential sedimentary facies: washover deposition, fair-weather swash deposition and lagoonal deposition.
Relying on the variations within the sedimentary facies, the formation of the embayed seashore may very well be divided into two phases: lake-level highstand and lake-level lowstand. Hydrodynamic adjustments in these two phases led to heterogeneity in sediment distribution, exhibiting within the variations of morphology and sedimentary structure.
Throughout the lake-level highstand stage, geomorphic adjustments primarily occurred within the cross-shore path. Throughout the lake-level lowstand stage, the sediments have been primarily transported alongshore inside the embayed seashore.
With the lake-level falling, the topography and hydrodynamics always modified alongside the embayed seashore. The interplay of topography and hydrodynamics managed the formation and evolution of the embayed seashore.
“Our examine not solely improves understanding of the sedimentary processes concerned in embayed seashores, but additionally gives steerage to seashore ridge reservoirs for oil exploration,” stated Dr. Hao Lewei from NIEER, first writer of the examine.
Extra data:
Lewei Hao et al, Sedimentary evolution of the embayed seashore from Qinghai Lake, northern Qinghai-Tibetan Plateau, China, Journal of Paleolimnology (2023). DOI: 10.1007/s10933-023-00293-w
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Chinese language Academy of Sciences
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Research reveals sedimentary structure and hydrodynamic processes concerned in lacustrine embayed seashore (2023, July 14)
retrieved 14 July 2023
from https://phys.org/information/2023-07-reveals-sedimentary-architecture-hydrodynamic-involved.html
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