Method for quantitative forecasting of lake basin landforms based on flow field representation

Abstract

The invention discloses a method for quantitative forecasting of lake basin landforms based on flow field representation. The method comprises the steps that major sand control geological factors are determined; according to structural characteristics of a research area, a basin is recovered according to a stratum burial history; a dynamic simulation system of a basin deposition sand body system is established based on basin recovery, and influences of material sources, hydrodynamic condition parameters and structural characteristic parameters on sand body distribution evolution are analyzed; according to different particle carrying modes, deposition substances are divided into cohesive silt and non-cohesive silt, and simulation representation of deposition compositions can be achieved; through simulation representations of the deposition compositions, three deposition conditions including deposition, denudation and no keeping after passing of the analyzed deposition substances are judged, and a deposition amount of the deposition substances is computed; quantitative representation of the deposition basin can be achieved; and based on simulation, the thickness of the deposition substances is overlaid to a bottom shape and finally projected to a horizontal plane, so the quantitative forecasting of the lake basin landforms can be achieved. The method has the advantages that different deposition environments can be simulated and analyzed, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, more specifically, it is a quantitative prediction method of lake basin topography based on flow field characterization. Background technique [0002] In traditional geological research, the layer-by-layer backstripping method is often used to characterize the landform of lake basins, which decompacts the stratum layer by layer and denudates layer by layer to restore the ancient landform. This method often uses the analysis of geological processes. The paleogeomorphology of the study area is obtained by inversion, and the geomorphology restored by the method of combining the present and the ancient can be used to restore the shape of the sedimentary body after deposition. Such a method can only be constrained by finding sedimentary bodies similar to modern sedimentary facies. , this process is a qualitative characterization, not only cumbersome but also unsatisfact...

AI Technical Summary

Problems solved by technology

[0002] In traditional geological research, the layer-by-layer backstripping method is often used to characterize the landform of lake basins, which decompacts the stratum layer by layer and denudates layer by layer to restore the ancient landform. This method often uses the analysis of geological processes. The paleogeomorphology of the study area is obtained by inversion, and the geomorphology restored by the method of combining the present and the ancient can be used to restore the shape of the sedimentary body after deposition. Such a method can only be constrained by finding sedimentary bodies similar to modern sedimentary facies. , this process is a qualitative characterization, not only cumbersome but also the results obtained are not satisfactory

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