A method and device for measuring the original thickness of coastal sandbars in ancient lakes

Abstract

The invention provides a method and a device for measuring the original thickness of sand bars along the coast of ancient lakes. The method includes: determining the distribution range of the sand bar along the coast according to the sedimentary distribution map in the paleo-sedimentary period, and drawing the well-connected profile of the coastal sand bar; dividing the spontaneous potential curve of the well-connected profile into a plurality of subunits; The area corresponding to the sub-units conforming to the standard curve in subunits is regarded as the coastal sand bar in a specific period. The standard curve is determined according to the hydrodynamic process and lithofacies code of the coastal sand bar formation; the thickness of the coastal sand bar in a specific period is calculated ; Perform decompaction correction on the thickness of the coastal sand bar in a specific period to obtain the original thickness of the coastal sand bar in a specific period. The invention provides support for accurately obtaining paleowind force when sand bars along the coast of ancient lakes are formed.

Description

technical field [0001] The invention relates to the technical field of paleo-environment reconstruction, in particular to a method and device for measuring the original thickness of sandbars along the coast of paleo-lakes. Background technique [0002] With the development of sequence stratigraphy, seismic sedimentology and fine sedimentary dynamics, the study of various sedimentary facies types and stratigraphic framework has become a hot spot in sedimentology research. Coastal sand bars are relatively important sedimentary sand bodies developed at the edge of lakes. Under the action of lake waves or coastal currents, deltas or other near-shore shallow water sand bodies in the adjacent area are transported and deposited in shallow lake areas. Millions of years and thousands of years of sedimentation and burial have formed coastal sand bars that have been buried deep underground. Because there are many pores in its internal rocks, it can store rich oil and gas resources, an...

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Problems solved by technology

[0005] In view of this, the purpose of the embodiments of the present invention is to provide a method and device for measuring the original thickness of sand bars along the coast of ancient lakes, to solve the problem that there is no relevant data on the original thickness measurement methods of sand bars along the coast of ancient lakes. Accurately obtain the technical problem of paleowind force support when the sand bar along the ancient lake is formed, so as to realize the original thickness by using the measurement method of the original thickness of the sand bar along the ancient lake provided by this invention, and then accurately obtain the sand bar along the ancient lake The ancient wind power of the time provides support

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