Method and system for determining heterogeneous carbonate reservoir saturation exponent

US11112527B2 · kind B2 · utility

Assignee

• PetroChina Company Limited · CN

Inventors

• Ning Li · Riverview Drive, CN
• Kewen Wang · Beijing, CN
• Yujiang Geno Shi · Sharon, US
• Hongliang Wu · Beijing, CN
• Taiping Zhao · Beijing, CN
• Qingfu Feng · Beijing, CN
• Zhou Feng · Beijing, CN
• Haitao Zhang · Ithaca, US
• Baoding Zhu · Beijing, CN
• Xiaoming Yang · San Diego, US

Key dates

• Filing date: May 15, 2017
• Grant date: Sep 7, 2021
• Expiry date: Jul 31, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V20/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present application provides a method and a system for determining a saturation exponent of a heterogeneous carbonate reservoir. The method comprises: dividing a target reservoir into at least two reservoir types in accordance with a predetermined rule; obtaining a correspondence relationship between a saturation exponent and a bound water saturation in each of the reservoir types; determining the reservoir type to which a to-be-measured core belongs in accordance with the predetermined rule; obtaining a bound water saturation of the to-be-measured core; and calculating the saturation exponent of the to-be-measured core according to the bound water saturation of the to-be-measured core on the basis of the correspondence relationship of the reservoir type to which the to-be-measured core belongs.