Shale oil analysis method and apparatus for continuously characterizing saturation of adsorbed oil and free oil

US11086044B2 · kind B2 · utility

Assignee

• PetroChina Company Limited · CN

Inventors

• Dongming Zhi · Beijing, CN
• Lichun Kuang · Beijing, CN
• Xiaojun Wang · Holdrege, US
• Zhongchun Sun · Beijing, CN
• Zhijun Qin · Beijing, CN
• Wei Wang · Beijing, CN
• Ni Zhang · Beijing, CN
• Xinjun Mao · Beijing, CN
• Min Ouyang · Foshan, CN
• Qiusheng Chang · Beijing, CN

Key dates

• Filing date: Dec 30, 2019
• Grant date: Aug 10, 2021
• Expiry date: Dec 30, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/448
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A shale oil analysis method and apparatus for continuously characterizing saturation of adsorbed oil and free oil, comprising: obtain NMR T2 spectrum, NMR porosity, oil saturation and wettability indexes of a core samples, determine a lower limit value for the saturation calculation of the absorbed oil based on the NMR T2 spectrum, the NMR porosity, the oil saturation and wettability indices; determining a lower limit value for the saturation calculation of the free oil according to the bulk relaxation T2 spectrum of the crude oil of the well interval or an adjacent well interval and the NMR T2 spectrum of the core samples; calculating the saturation of the absorbed oil and the free oil, and analyzing the shale oil in the well interval to be analyzed. The solution realizes the quantitative and continuous characterization of the adsorbed oil and the free oil of the shale oil via well logs.