公开(公告)号：US20210232868A1

公开(公告)日：2021-07-29

申请号：US16776183

申请日：2020-01-29

Applicant: Chevron U.S.A. Inc.

Inventor： Bo GONG ,  Hanming WANG

IPC: G06K9/62 ,  G01V99/00

Abstract: Embodiments of categorizing fractures in a subsurface formation are provided herein. One embodiment comprises obtaining at least one borehole image for a plurality of fractures in a subsurface formation and at least one resistivity log for the plurality of fractures of the surface formation. The embodiment comprises determining first aperture data based on the at least one borehole image for the plurality of fractures and determining second aperture data based on the at the least one resistivity log for the plurality of fractures. The embodiment comprises comparing the first aperture data based on the at least one borehole image and the second aperture data based on at least one resistivity log to determine whether to categorize each fracture of the plurality of fractures as a naturally occurring fracture or a non-naturally occurring fracture. The embodiment comprises generating an output indicating the categorization of each fracture and displaying the output.

公开(公告)号：US20180321412A1

公开(公告)日：2018-11-08

申请号：US15948702

申请日：2018-04-09

Applicant: Chevron U.S.A. Inc.

Inventor： Haijing WANG ,  Hanming WANG ,  Emmanuel TOUMELIN

IPC: G01V3/20 ,  G01N15/08 ,  G01N27/02

CPC classification number: G01V3/20 ,  G01N15/088 ,  G01N27/026 ,  G01N2015/0853

Abstract: A method for determining water-filled porosity and water salinity in a well includes obtaining complex dielectric permittivity of earth formations, either from dielectric measurements representative of well cores, or from dielectric well logs; selecting a dielectric mixing law for the index number m; plotting a m-th root of complex dielectric permittivity at a specified frequency in the complex domain, wherein m is an index number; determining a matrix permittivity, a water salinity, and a water-filled porosity based on the complex dielectric permittivity and the dielectric mixing law; and displaying the water salinity and the water-filled porosity.