Application of Raman spectroscopy for analyzing the behavior of gases in sandstone reservoirs

IF 4.3 2区化学 Q1 SPECTROSCOPY Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2024-10-22 DOI:10.1016/j.saa.2024.125323

Sun Young Park , Taewoong Ahn , Hyojong Lee , Zhouheng Chen

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Abstract

The behavior of gases within subsurface pores determines the oil and gas recovery and CO₂ storage in the region. In this study, we report a novel method based on Raman spectroscopy for observing the distributions of CH₄ and CO₂ gases in the pores of sandstone reservoirs. First, we designed a pressure-cell to inject gases into a sample. Then, CH₄ and CO₂ gases were injected into the sample using the pressure-cell placed on the Raman spectroscopy system sample stage. Quartz and feldspar were the predominant minerals in the sample. The CH₄-occupied pores exhibited a Raman peak at 2917 cm⁻¹. Two-dimensional (2D) and three-dimensional (3D) mapping of the pores depicted the geometry of the CH₄ gas-filled pores. After injecting CO₂ gas, we observed an intensity peak at 1388 cm⁻¹; we obtained 2D and 3D maps of the CO₂ gas-filled pores based on this peak value. This study demonstrates the potential use of Raman spectroscopy as a visualization tool to reveal the pore geometry of sandstone reservoirs and determine the distribution of gases within such reservoirs. Our study can serve as a foundation for understanding the behavior of gases in subsurface reservoirs, improving oil and gas prospecting and exploration, and assessing CO₂ storage.

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应用拉曼光谱分析砂岩储层中的气体行为

气体在地下孔隙中的行为决定了该地区的油气采收和二氧化碳封存。在本研究中，我们报告了一种基于拉曼光谱观测砂岩储层孔隙中 CH4 和 CO2 气体分布的新方法。首先，我们设计了一个向样品注入气体的压力容器。然后，利用放置在拉曼光谱系统样品台上的压力罐向样品中注入 CH4 和 CO2 气体。样品中的主要矿物是石英和长石。占据 CH4 的孔隙在 2917 cm-1 处显示出拉曼峰。孔隙的二维（2D）和三维（3D）绘图显示了充满 CH4 气体的孔隙的几何形状。注入 CO2 气体后，我们在 1388 cm-1 处观察到一个强度峰值；根据该峰值，我们获得了充满 CO2 气体的孔隙的二维和三维图谱。这项研究展示了拉曼光谱作为一种可视化工具在揭示砂岩储层孔隙几何形状和确定此类储层中气体分布方面的潜在用途。我们的研究可以为了解地下储层中的气体行为、改进油气勘探和开采以及评估二氧化碳封存奠定基础。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.