Method for comprehensively characterizing lower limit of oil accumulation of deep marine carbonate reservoir

US11513088B1 · kind B1 · utility

Assignee

• Institute of Geology and Geophysics, Chinese Academy of Sciences · CN

Inventors

• Wenyang Wang · Changchun, CN
• Rixiang Zhu · Beijing, CN
• Xiongqi Pang · Beijing, CN
• Zhangxing Chen · Beijing, CN
• Yaping Wang · Cambridge, US
• Wang Zhang · Nanjing, CN
• Tao Hu · Shanghai, CN

Key dates

• Filing date: Feb 28, 2022
• Grant date: Nov 29, 2022
• Expiry date: Feb 28, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/241
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method, system and device for comprehensively characterizing a lower limit of oil accumulation of a deep marine carbonate reservoir is provided, aiming to solve the problem that the prior art cannot: accurately determine the lower limit of oil accumulation of the deep marine carbonate reservoir, which leads to the difficulty in predicting and identifying deep effective reservoirs. The method includes: determining lower limit porosity and permeability for oil accumulation based on a boundary line; determining lower limit porosity and permeability for oil accumulation based on a movable oil ratio of a core sample; determining a lower limit pore throat radius for oil accumulation based on a mercury injection experiment; and comprehensively characterizing the lower limit of oil accumulation of a deep marine carbonate reservoir to be predicted. The method, system and device can predict and identify deep effective reservoirs.