Method and device for determining structural dynamic evolution characteristics of superimposed basins

Abstract

The invention provides a method and device for determining superimposed basin tectonic dynamic evolution characteristics. The method comprises the steps that a geological section which is perpendicular to the fault strike of a superimposed basin to be measured is selected as a benchmark geological section; the ratio of expansion and contraction of the benchmark geological section in each period of one or more periods is calculated; N geological sections are obtained through selection; a rose diagram which represents tectonic dynamic evolution characteristics of the superimposed basin to be measured in each period of all the periods is drawn according to the ratio of expansion and contraction of the benchmark geological section in each period of all the periods and ratios of expansion and contraction of the N geological sections in each period of all the periods. According to the method and device for determining superimposed basin tectonic dynamic evolution characteristics, the technical problem that in the prior art, the dynamic direction cannot be qualitatively represented is solved, and the purpose of representing the dynamic direction and evolution thereof in the quantitative aspect is achieved.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to a method and a device for determining the structural dynamic evolution characteristics of a superimposed basin. Background technique [0002] A superimposed basin refers to a basin with a complex structure in which the prototype basin is vertically superimposed in sequence due to the different forms of deformation of different structural layers under the action of the complex dynamic mechanism of multi-stage, multi-directional and multi-scale changes. The basin in each period has its own relatively independent prototype, and its tectonic pattern, geometric style and deformation mode are different from other periods. The superposition of different periods reflects the evolution process of the gradual transformation and superposition of the prototype basin. Therefore, analyzing the dynamic mechanism and evolution history of superimposed basins, and restoring the stre...

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Problems solved by technology

[0006] Second, after compiling the structural evolution section, it is usually necessary to calculate parameters such as the amount of extension (amount of shortening) and the rate of extension (ratio of shortening). Due to inevitable errors and errors of human operation, the geological significance of the absolute parameters obtained is not good. powerful

[0007] Third, in traditional structural research, the determination of dynamic direction is generally based on the perspective of structural deformation, and basically stays at the qualitative level, which is subjective and multi-solutional. At the same time, the dynamic direction of superimposed basins has stages and variability. Factors undoubtedly increase the difficulty of the study of tectonic dynamics

Therefore, it is difficult to quantitatively characterize the dynamical direction and its evolution

[0008] For the above problems, no effective solutions have been proposed so far

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