Sediment particle size spectrum analysis method and device

Abstract

The invention provides a sediment particle size spectrum analysis method and device. The sediment particle size spectrum analysis method includes the steps that sediment samples are acquired; the particle size distribution of the sediment samples is obtained through a laser scattering particle size distribution analyzer, and the particle size of the sediment samples is determined according to the set size range; spectrum transition of the sediment samples at the set wavelength position is eliminated, the reflectance spectrum of the sediment samples is generated and reprocessed, and three derived spectrum indexes of a reflectance first-order derivative, a logarithm of a reflectance reciprocal and reflectance absorption depth are generated; the relevance between the particle size of the sediment samples, the reflectance within the set wavelength range, the reflectance first-order derivative, the logarithm of the reflectance reciprocal and the reflectance absorption depth is calculated through a relevance analyzing method, and the optimal spectrum indexes and wavelengths participating in modeling are determined; through a partial least squares method, a regression model between the particle size of sediment and the optimal spectrum indexes is established.

Description

technical field [0001] The invention relates to sediment analysis technology, in particular to a sediment particle size spectrum analysis method and device, belonging to the field of sedimentology. Background technique [0002] The grain size characteristics of sediments can reflect the evolution process of depositional environment, depositional facies and depositional environment. There are many methods for sediment particle size analysis. For petroleum and geological industries, direct measurement method, sieve analysis method, sedimentation method, thin slice particle size image analysis method and laser method are widely used. Among them, the laser method has the advantages of fast analysis speed, good reproducibility, and wide measurement range, and is currently the most widely used in sediment particle size measurement. The above methods have a common feature, that is, the sediment samples must be brought back to the laboratory for a series of complex sample pretreatm...

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Problems solved by technology

The above-mentioned laboratory measurement method has high precision, but the disadvantage is that it is complicated and time-consuming, and cannot be obtained directly in the field, which affects researchers' accurate grasp of the depositional characteristics of different sedimentary facies in the field

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