The Elemental Analysis of Deep Earth Cuttings Based on Laser-Induced Breakdown Spectroscopy

The Elemental Analysis of Deep Earth Cuttings Based on Laser-Induced Breakdown Spectroscopy

To address the demand for rapid in-situ detection of mineral and carbon elements in cuttings during ultra-deep hydrocarbon exploration, this study proposes an efficient elemental composition detection method based on laser-induced breakdown spectroscopy (LIBS). By systematically analyzing the charac...

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Bibliographic Details
Main Authors: GUO Qingbin, HU Wei, SHI Mingxin, ZHENG Pengfei, WU Di, AI Yong, CHEN Minxin, YU Jun
Format: Article
Language:Chinese
Published: Editorial Office of Well Logging Technology 2025-06-01
Series:Cejing jishu
Subjects:
log interpretation
laser-induced breakdown spectroscopy
elemental quantitative analysis
shale oil and gas
ultra-deep well
neutron capture logging
Online Access:https://www.cnpcwlt.com/en/#/digest?ArticleID=5747
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Summary:To address the demand for rapid in-situ detection of mineral and carbon elements in cuttings during ultra-deep hydrocarbon exploration, this study proposes an efficient elemental composition detection method based on laser-induced breakdown spectroscopy (LIBS). By systematically analyzing the characteristic spectral lines of carbonate rocks, sandstones, and mudstones, quantitative models are established for Si, Ca, Mg, Fe, Al and C elements. The experimental protocol employed a multi-point sampling and averaging strategy, with validation of detection accuracy conducted using X-ray fluorescence spectroscopy (XRF) and neutron capture logging data. The results demonstrate that the absolute prediction errors for major mineral elements (Si, Ca, Mg) do not exceed 3.20%, while the errors for Fe and Al elements remain below 0.31%. Furthermore, this method successfully achieved carbon element detection in cuttings from ultra-deep wells in the Tarim basin, showing consistent trends with mud logging data. This study confirms that LIBS technology can overcome the limitations of traditional methods in light element detection, providing a high-precision, multi-element synchronous analysis tool for ultra-deep hydrocarbon exploration. Its application holds significant value for rapid reservoir oil-bearing potential evaluation.
ISSN:1004-1338

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