Cation exchange capacity and water saturation from array induction data

P Zhang, W Abdallah, S Ma - US Patent 10,215,876, 2019 - Google Patents
(Continued) Primary Examiner—Giovanni Astacio-Oquendo (74) Attorney, Agent, or Firm—
Bridget Laffey (57) ABSTRACT In-phase and quadrature components have different relation …

Determination of shale content of formation from dispersive multi-frequency dielectric measurements

Y Zhang - US Patent 10,649,110, 2020 - Google Patents
Methods and apparatus for evaluating a volume of an earth formation wherein the volume
comprises a fluid-saturated rock matrix including clay particles. Methods include making …

Real-time inversion of array dielectric downhole measurements with advanced search for initial values to eliminate non-uniqueness

Y Zhang, A Mezzatesta - US Patent 10,732,315, 2020 - Google Patents
Methods and apparatus for evaluating a volume of an earth formation carried out using
complex dielectric measurements. Methods include making measurements of complex …

Clay detection and quantification using downhole low frequency electromagnetic measurements

S Ma, P Zhang, W Abdallah, CB Liu - US Patent 11,237,292, 2022 - Google Patents
Methods and systems are provided for clay detection, clay typing, and clay volume
quantification using downhole electromagnetic measurements conducted by a downhole …

Finding combined hydrocarbon fraction and porosity by means of dielectric spectroscopy

VN Dorovsky - US Patent 10,585,056, 2020 - Google Patents
Methods, systems, devices and products for evaluating an earth formation comprising a
porous medium. Methods include estimating at least one property of the earth forma tion …

Methods of determining cation exchange sites in rock core samples

Q Chen - US Patent 11,300,494, 2022 - Google Patents
(57) ABSTRACT A method for determining properties of different cation exchange sites in a
rock core sample may include providing a rock core sample that is in either a preserved …

Permeability determinations from wideband EM models using borehole logging tools

NV Seleznev, TM Habashy - US Patent 11,061,163, 2021 - Google Patents
A permeability log is generated by running borehole tools in a borehole traversing a
formation, including at least electromagnetic (EM) tool providing at least a low-frequency …

Clay detection and quantification using low frequency electromagnetic measurements

W Abdallah, P Zhang, S Ma, CB Liu - US Patent 11,499,935, 2022 - Google Patents
Methods and systems are provided for clay detection, clay typing, and clay volume
quantification using electromag netic measurements on a porous media sample at a low …

Clay detection and quantification using downhole low frequency electromagnetic measurements

S Ma, P Zhang, W Abdallah, CB Liu - US Patent 11,940,588, 2024 - Google Patents
Methods and systems are provided for clay detection, clay typing, and clay volume
quantification using downhole electromagnetic measurements conducted by a downhole …

Characterization of fluid inside pipe using multi frequency electrical signal

VK Chillara, MK Mudunuru, HS Viswanathan… - US Patent …, 2022 - Google Patents
(57) ABSTRACT A multi-frequency signal may be used to induce voltage dif nce across a
portion of a pipe. he voltage difference may be induced to take multi-frequency …