... 65th Annual Logging Symposium, May 18-22, 2024 DIELECTRIC DISPERSION INTERPRETATION The electromagnetic (EM) properties of a soil include its magnetic permeability, electrical conductivity, and dielectric permittivity. Since most soils are nonferromagnetic, soil EM properties usually refer...

... them in a comparison with wireline dielectric measurements conducted in much higher frequencies. In this study, several methods are evaluated in obtaining dielectric permittivity from LWD EM measurements of 400 kHz and 2 MHz frequencies: Method 1 is an analytical Resistivity Based Approximation (RBA...

... and geometric parameters of casings on the decay curves of the transient process (TP) has been studied and it is shown that the degree of influence of magnetic permeability and electrical conductivity of casing is of the same order of magnitude as the thickness of the casing wall. Creation of small-sized tool...

... frequency permeability receiver eccentricity conductivity ABSTRACT Well completions typically encompass a series of multiple barriers which are crucial for supporting both production activities and protecting aquifers from contaminants. Monitoring the integrity of these completions is pivotal...

... conductivity diffusion impedance coefficient spectrum electrical resistivity response determination SPWLA 65th Annual Logging Symposium, May 18-22, 2024 DOI: 10.30632/SPWLA-2024-0137 ESTIMATION OF PERMEABILITY THROUGH ELECTRICAL RESISTIVITY RESPONSE DETERMINATION IN CARBONATE ROCKS FROM THE SERGIPE SUB...

... symposium spwla 65 conductivity spwla-2024-0010 university simulation ABSTRACT Ionic properties and concentration significantly influence the response of brine-saturated rock samples to electromagnetic disturbance. However, the dielectric permittivity response of rock samples under different...

... permittivity in the z direction (i.e., the real part of the dielectric permittivity) decreased with an increase in the aspect ratio of the spheroid grains. The electrical conductivity (which is associated with the imaginary part of the dielectric permittivity) decreased as the grains became flatter, which...

... ABSTRACT Formation dielectric dispersion is known to be affected by reservoir wettability. In the typical downhole dielectric tool frequency range in MHz–GHz, a hydrocarbon-wet reservoir generally has a reduced conductivity with a less dispersive permittivity response. To capture the effect...

... solid waste management geologist clastic rock mudrock united states government europe government well logging log analysis reservoir characterization mineral repository characterisation spwla 64 sequence geology rock type porosity geological subdiscipline spwla-2023-0006 conductivity...

... ABSTRACT The Waxman-Smits formula was introduced in 1968 as a parallel conductance model to improve previous models. A careful inspection of Waxman's and Smits model reveals it is not a parallel conduction model by the conventional definition. First, Waxman-Smits assumed that "the electrical...

... ABSTRACT Assessment of fluid conductivity of fractures in interbedded formation types is challenging for resistivity imagers due to non-unique electrical conductivities of fluid and fracture fill. Natural fractures can enhance formation permeability and improve fluid flow; thus...

... to 0.01 MHz. Increasing fracture surface roughness from a completely smooth slit-like fracture to a rough fracture with a fractal dimension of 3 led to an increase in the relative dielectric constant by more than one degree of magnitude while the sample conductivity decreased by 40%. Changing sample...

... induction tool. However, the SNR of raw conductivity signals under such background is very low with negative value exist for some coils with short T-R spacing. As a result, array Rt logs with different DOI from the classic "software focusing" algorithm overlaps and flattens out, which is too poor for fluid...

... amplitude response annual logging symposium permittivity flowback reservoir characterization upstream oil & gas natural fracture logging symposium th annual logging symposium spwla 63 symposium conductivity complex reservoir modeling em response geometry spwla-2022-0089 rd annual...

... and defines an electric vector potential function to describe the transient electromagnetic field excited by the electrode. The radial eddy currents and circular magnetic fields in the conductive ring of the Doll formation are analyzed by the retardation potential. According to the reciprocal symmetry...

... Abstract From the first wireline log in 1927, formation evaluation always had to provide estimates for water saturation to identify and quantify hydrocarbon-bearing reservoir rocks. Formation conductivity (or resistivity) was the single leading quantity for input to various saturation models...

... pairs. In this frequency range, the measurements are sensitive to both the electric conductivity and dielectric permittivity in surrounding rock formations. Tool response to these two parameters has been characterized by modeling and is well known after many decades of study and analysis. However...

.... However, Archie's model filled a void in formation evaluation, and works well. Four decades would pass before researchers began to attempt to connect conductivity in rocks as described by the Archie model to first principles. Since 1980 several attempts to connect the Archie model to first principles were...

... with conductive beds. Iterative forward modeling inversion is applied to estimate the formation resistivity from the log resistivity. The inversion has to assume an earth model. Iterative forward modeling inversion is time consuming by nature. The inversion is empirical as the regularization coefficient has...

... Abstract A Staged Differential Effective Medium (SDEM) model based on the Hanai-Bruggeman equation is applied to interpret water saturation in shaly sands. In this model, the conductivity of the formation changes when different volumes of clays, oil, and quartz (inclusions) are successively...