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Updated: May 11, 2025

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
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使用井记录数据和机器学习来预测密集的水库岩石的孔径

Yawen He1,2, Hongjun Zhang3, Zhiyu Wu4,5

  • 1Department of Geology, Northwest University, Xi'an, 710069, China.

Scientific reports
|April 16, 2025
PubMed
概括

精确的孔径量化在紧密的水库对于石油和天然气勘探至关重要. 一种新的粒子优化-梯度提升决策树 (PSO-GBDT) 模型使用井记录数据显著提高了预测准确性.

关键词:
梯度提升了决策树.机器学习是机器学习.粒子群集优化优化 粒子群集优化孔隙性预测的预测紧密的水库储存器是一个紧密的水库.

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Porosity in Cement Paste01:18

Porosity in Cement Paste

The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
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Porosity and Absorption of Aggregate

Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
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Pore Size Distribution01:23

Pore Size Distribution

In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
Adequate...
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