Application of nanosecond laser induced breakdown spectroscopy to elemental analysis of cuttings samples

doi:10.3969/j.issn.1672-7703.2018.01.013

Abstract

Abstract: Nanosecond laser induced breakdown spectroscopy (ns-LIBS) is a new elemental analysis technology, and it has been gradually applied in various industries. It is superior to traditional elemental analysis technologies and it is advantageous with high analysis speed, simple sample pretreatment and availability for all elemental analyse. In this paper, the independently developed ns-LIBS system was used to analyze the elemental compositions and contents of cutting samples taken from oil wells qualitatively and quantitatively. First, experimental parameters were determined, especially the relative distance between the focus of convergent lens and the surface of sample. Second, the content difference of indicator elements was verified by comparing the LIBS of cutting samples with different lithologies. Third, the best analysis lines of external standard method for Mg, Na, Si, etc were defined. And fourth, the lithology was identified by means of analytic hierarchy process and chart analysis method jointly. It is indicated that ns-LIBS is applicable to analyze elemental compositions and contents of cutting samples.

Key words: nanosecond laser induced breakdown spectroscopy (ns-LIBS), cuttings, analytic hierarchy process, chart analysis method

CLC Number:

Yang Mingqing, Wang Chao, Yan Zhiquan. Application of nanosecond laser induced breakdown spectroscopy to elemental analysis of cuttings samples[J]. China Petroleum Exploration, 2018, 23(1): 117-124.

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