Abstract: 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 complex conductivity measurement at least one frequency. Data from the EM tool and other data obtained from other tools are provided to a wideband EM model, where a data inversion is conducted to provide a plurality of outputs from which a cementation exponent may be calculated. The cementation exponent is used to find a formation factor at each depth of interest in the borehole, and the formation factor is used to find a permeability value which is used for the permeability log. The permeability log may be generated without the use of core data.

Abstract: 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 complex conductivity measurement at at least one frequency. Data from the EM tool and other data obtained from other tools are provided to a wideband EM model, where a data inversion is conducted to provide a plurality of outputs from which a cementation exponent may be calculated. The cementation exponent is used to find a formation factor at each depth of interest in the borehole, and the formation factor is used to find a permeability value which is used for the permeability log. The permeability log may be generated without the use of core data.

Abstract: Techniques involve inverting a dielectric dispersion model based on the geometrical and electrochemical effects that affect dielectric dispersion in fluid-saturated rocks and other porous formation with formation data and measurements to obtain further formation characteristics. A workflow involves using multi-frequency dielectric measurements of the dielectric constant and the conductivity of the formation for reservoir evaluation. The workflow also involves determining formation data such as matrix permittivity, formation temperature, pressure, and porosity, etc., and inverting the formation data and the multi-frequency dielectric measurements with the dielectric dispersion model to determine formation characteristics such as volumetric fraction of water in the formation, the formation water salinity and the Cation Exchange Capacity (CEC), etc. From the CEC log, in combination with other measurements, clay typing may be performed and swelling clays may be identified.

Abstract: A method (and system) is provided that enhances production of hydrocarbons from a subterranean formation by identifying at least one target interval of the subterranean formation that is in proximity to a pay interval, wherein the at least one target interval has an electrical resistance less than electrical resistance of the pay interval. A plurality of electrodes are placed in positions spaced apart from one another and adjacent the at least one target interval. Electrical current is injected into the target interval by supplying electrical signals to the plurality of electrodes. The electrical current injected into the at least one target interval passes through at least a portion of the at least one target interval in order to heat the at least one target interval and heat the pay interval by thermal conduction for enhancement of production of hydrocarbons from the pay interval.

Abstract: Techniques involve inverting a dielectric dispersion model based on the geometrical and electrochemical effects that affect dielectric dispersion in fluid-saturated rocks and other porous formation with formation data and measurements to obtain further formation characteristics. A workflow involves using multi-frequency dielectric measurements of the dielectric constant and the conductivity of the formation for reservoir evaluation. The workflow also involves determining formation data such as matrix permittivity, formation temperature, pressure, and porosity, etc., and inverting the formation data and the multi-frequency dielectric measurements with the dielectric dispersion model to determine formation characteristics such as volumetric fraction of water in the formation, the formation water salinity and the Cation Exchange Capacity (CEC), etc. From the CEC log, in combination with other measurements, clay typing may be performed and swelling clays may be identified.

Abstract: An apparatus for use in a system that includes a network analyzer for determining a property, such as dielectric permittivity of a sample material as a function of frequency, the apparatus including: a cylindrical chamber for receiving the sample; a coaxial connector having a first relatively small diameter end coupleable with the analyzer and a second relatively large diameter end communicating with a side of the cylindrical chamber, the connector having inner and outer coaxial conductors; the inner conductor of the connector having a diameter that tapers outwardly from the first end to the second end, and the outer conductor of the connector having an inner surface whose diameter tapers outwardly from the first end to the second end. The chamber can accommodate relatively large samples, such as standard earth formation coring samples.