Analysis and Application of Fluid Components in High-Clay Matrix Shale Oil: A Case Study of Gulong Shale Oil

Fujing Sun, Jianmeng Sun (), Min Wang and Peng Chi ()
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Fujing Sun: School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China
Jianmeng Sun: School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China
Min Wang: Shengli Oil Field Exploration and Development Research Institute, Dongying 257100, China
Peng Chi: School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China

Energies, 2024, vol. 17, issue 15, 1-17

Abstract: Fluid components in cores are crucial parameters in evaluating the quality of a shale reservoir in both laboratory analyses and log interpretation. In the Gulong area, shale reservoirs are characterized by a high clay content, with clay spaces hosting both oil and water phases, complicating the occurrence mechanism of fluid components, as a result, traditional research methods are no longer applicable. As an advanced technique, nuclear magnetic resonance (NMR) has been applied in oilfields to determine the specific petrophysical properties of rocks. To more accurately identify the types of fluid components, this study carried out a new, well-designed 2D NMR experiment, rock pyrolysis experiment, and quantitative oil and water detection experiment (QOWDE) to study the Gulong shale. This study measured the 2D NMR map of the original state, saturation state, centrifugal state, and pyrolysis at different temperatures, and conducted mutual verification between the QOWDE and 2D NMR pyrolysis experiments to obtain the distribution of different components of Gulong shale on the 2D NMR map. Based on the experimental results, this study developed a component identification template suitable for the Gulong area and calculated the 2D NMR porosity and saturation from it. This lays a foundation for the analysis and application of fluid components in the Gulong region and provides a new experimental basis and methodological support for porosity and saturation calculations.

Keywords: Gulong shale oil; fluid component analysis; high clay shale; 2D NMR experiment; shale composition (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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