Sample selection method and system for fine-grained sedimentary rock analysis experiment

Abstract

The invention discloses a method and system for selecting samples of a pulveryte analysis experiment. The method comprises the following steps: obtaining initial information corresponding to geological materials of pulveryte, and carrying out primary classification on the geological materials according to the initial information; selecting and scanning the geological materials under each category, and obtaining the element types, the element contents and the variation trend corresponding to the geological materials; optionally selecting two element types for carrying out correlation analysis, and determining a corresponding element group of each element according to the correlation analysis; establishing a first corresponding relationship between the element groups and main control factors; selecting representative elements, and establishing a second corresponding relationship between the representative elements and designated evaluation parameters; carrying out clustering analysis by utilizing a longest distance method, and carrying out secondary classification on the geological materials; selecting target samples according to a secondary classification result. According to the method and the system, provided by the invention, the selecting efficiency and the accuracy of the samples of the pulveryte analysis experiment can be increased.

Description

technical field [0001] The invention relates to the field of sampling for petroleum exploration petroleum experiments, in particular to a sample selection method and system for fine-grained sedimentary rock analysis experiments. Background technique [0002] With the rise of unconventional oil and gas, fine-grained sedimentary rocks (including siltstone and mud shale) have become the latest research direction and frontier field in the field of sedimentology at home and abroad. Among them, the research on fine-grained sedimentary rocks is mainly concentrated in the field of geochemical source rocks in geochemistry, and the information contained in them, such as sedimentation, reservoirs, and climate, has also attracted increasing interest in the scientific community. [0003] Fine-grained sedimentary rocks have the characteristics of low porosity, heterogeneous composition, complex fluids, and difficult classification of rock types. How to select representative samples in th...

AI Technical Summary

Problems solved by technology

At present, the samples of fine-grained sandstone experiments are selected randomly. However, due to the high heterogeneity different from thick sandstone or carbonate rock, this random method is often easy to miss some typical samples that need to be carried out. Samples for special laboratory analysis

If each core sample is analyzed at very small depths, it will obviously increase the time and cost of the experiment, which is not only unnecessary, but also unrealistic

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