Method and system for detecting accumulation state of hydrate in rock core sample in real time

Abstract

The invention relates to the field of geological exploration, and aims to provide a method and a system for detecting the accumulation state of hydrates in a rock core sample in real time. Comprising the following steps: enabling a cylindrical rock core sample to continuously pass through a sample channel of a sound velocity detection device along the axial direction by utilizing a sample displacement device; in the process, the sound velocity detection device emits pulse sound waves in the radial direction of the rock core sample and receives sound wave signals penetrating through the rock core sample; after the data acquisition card acquires sound wave signals, the sound wave signals are sent to the computer for processing, and a real-time oscillogram is drawn; performing de-noising standardization processing on the data of the real-time oscillogram to form real-time core sample input data; and inputting the core sample input data into the trained neural network, and calculating to obtain a real-time prediction result. According to the invention, on the premise of not damaging the rock core sample, the hydrate accumulation state can be quantitatively predicted, the accuracy is higher, and the data processing speed is high; the working efficiency can be greatly improved, an analysis basis is provided for measurement, and the application scene is further expanded.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method and a system for real-time detection of a hydrate accumulation state in a core sample. Background technique [0002] Rock physics experiments have always played an important role in the study of geophysics, and their experimental results are generally considered to be the most accurate, so a large number of rock physics studies are based on this. However, rock cores are often damaged in petrophysical experiments, and it is difficult to reuse them, resulting in increased research costs or discontinuity of research subjects to a certain extent. [0003] The elastic mechanical parameters of rock (bulk modulus, shear modulus, Poisson's ratio, etc.) are inextricably linked to its structural composition, formation and evolution, and have a unique position in the study of earth sciences. The rock pore structure affects the rock acoustic properties. The measurement of the ...

AI Technical Summary

Problems solved by technology

However, this technical solution can only store and export data through an oscilloscope, and it is necessary to manually calculate the sound velocity by exporting the data; more importantly, this technical solution can only roughly estimate the existence of hydration in the core sample based on the experience of the technician through the waveform change. Therefore, it is impossible to make a qualitative analysis and judgment on the storage state of hydrate in combination with the measurement situation.

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