... field arising from the overburden can prevail; leading to less clear interpretations. We describe a method to overcome this challenge. Source body migration is used to identify the depth sensitivity of dominant signal and a selfsteering directional filter applied to extract clear signal associated...

... gradient information, like the Gauss-Newton method, is only feasible with an accurate and fast method to calculate sensitivities, a critical and time-demanding task in inverse problems. Here, an efficient solution is discussed that generates accurate sensitivities using a 3D Vector Finite Element program...

.... The second and third part of this research consists of simulate the 2D and 3D EM anisotropic response and study the sensitivity of the fields to the different geological scenarios, symmetries or anisotropies and receivertransmitter configurations. The results indicate that the longterm electromagnetic signal...

... tool. This method utilizes the difference of R ic of near and long detectors ( D 13 ) to monitor the gas content, which improves the sensitivity and reduces the detection limit of tight gas effectively. Meanwhile, the influence of lithology, borehole fluids and formation water salinity on tight...

... velocity sand dunes are subject to interpretation pitfalls due to the time delays affecting the interpretation of the target reservoir levels. The transient EM method is highly versatile and proven to have good sensitivity to the low resistivity substratum, base of sand (BoS). Once the BoS depth is mapped...

... upstream oil & gas reservoir exploration geophysicist geophysics structural geology international ex-ey inversion reservoir characterization applied geoscience reservoir monitoring energy 10 inversion csem sensitivity integrator society american association efficiency cost...

... & gas international pore relation deformation exploration geophysicist derivative sensitivity society prediction energy 10 coefficient Modeling Carbonate Pressure Dependence Predicting Pressure-dependent Velocities for Carbonates by Linking Static and Dynamic Elastic Properties Xuan Qin1...

... and vertical illumination than imaging using primaries alone. Next, we compare reverse time migration (RTM), mirror RTM imaging using up- going, down-going, and both wavefields, and imaging using seismic interferometry. We also examine the sensitivity of the different methods to the migration velocity model...

... exploration geophysicist west texa society delaware basin texas geophysical research energy 10 upstream oil & gas sensitivity reservoir characterization american association international applied geoscience south delaware basin relocation variation Induced seismicity hypocentral depth...

... data. Processing results of passive measurements demonstrated that a low sensitivity cable used for telecommunication, and a cable on the ground surface loosely covered with soil, provided consistent dispersion curves with geophones. The results imply that DAS can be applied to various types...

... between the monitors and the baseline are then used to generate the 4D DAS time shifts map. To capture a quantitative assessment of the 4D signature, a sensitivity analysis on the 4D implications of various fracture physical properties and survey parameters is conducted. The modeling results suggest...

... that occur in the wake of storm surges by incorporating electrical resistivity tomography (ERT) in hydrologic modeling of coastal saline transport at a field site on Assateague Island, MD. Due to the sensitivity of ERT to saline content, these methods were able to resolve the more fine-scale transport...

... Seismic waveform inversion (WI) has been applied to high-resolution velocity model building at all scales, but how truthful are the amplitudes of velocity anomalies recovered in the WI models? Previous sensitivity analysis of WI has focused on estimating model uncertainties, understanding...

... functionalities. Note: This paper was accepted into the Technical Program but was not presented at IMAGE 2021 in Denver, Colorado. sensitivity quantum gravity sensor summary differential quantum gravimeter research activity applied geoscience exploration geophysicist 10 gravimeter prototype...

... data and the full-waveform response of GPR without invoking petrophysical relationships. We join full-waveform inversion (FWI) GPR with adjoint derived ER sensitivities, without the need to interpolate the GPR and ER computational domains. We compare our recovered parameters to individual FWI-GPR...

... characterization production logging distributed acoustic sensing receiver spectral ratio method production control upstream oil & gas sensitivity das synthetic estimation das data bandwidth gauge length correction velocity zone reservoir surveillance attenuation frequency bandwidth sensor...

.... Our goal is to assess the use of seismoelectric effects (SEE), which arise from seismic-to-electromagnetic conversion in naturally charged porous media with a certain degree of fluid saturation. The key here is that, by leveraging the depth sensitivity of seismic signals, in combination with the fluid...

... joint estimation of VS and transversely isotropic parameters, which can provide near surface anisotropy for different applications. applied geoscience love-wave phase velocity receiver component dispersion curve anisotropic multimode upstream oil & gas subsurface sensitivity joint...

... Embedding the physics-based forward modeling function in training the deep network could improve the accuracy of the learning-based regression. Solving the geosteering inverse problem is a critical technique of logging while drilling (LWD). When the logging tool has an ultra-long sensitive...

... to conventional technology: first, it is provided the second, the magnetic field is the most sensitive field when time-space evolution of pressure, saturation, electric field, discriminating different types of anisotropy for all receiver magnetic field, electrical current and electrical resistivity. positions...