Method and device for measuring original thickness of longshore bar in ancient lake

Abstract

The invention provides a method and device for measuring the original thickness of a longshore bar in the ancient lake. The method comprises the steps that the distribution range of the longshore bar is determined according to a deposition distribution map of an ancient deposition period, and a well tie profile map of the longshore bar is drawn; a natural potential curve of the well tie profile map is divided into multiple sub-units; the area corresponding to the sub-units meeting a standard curve is used as the longshore bar in a specific period, wherein the standard curve is determined according to the hydrodynamic process of forming the longshore bar and lithofacies codes; the thickness of the longshore bar in the specific period is calculated; decompaction correction is conducted on the thickness of the longshore bar in the specific period, and the original thickness of the longshore bar in the specific period is obtained. Support is provided for obtaining of accurate ancient wind power existing when the longshore bar of the ancient lake forms.

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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