... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... & 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...

... Reservoir Monitoring system to show the industry that 4D CSEM can be the cost-efficient and effective integrator to 4D seismic. The Marlim’s case study presented here shows that the magnetic fields have comparable sensitivity to that of electric fields to map the 3D resistivity distribution and the 4D...

... 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...

... 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...

... of fluid saturation. The key here is that, by leveraging heterogeneity (due to e.g., a mechanical, electrical, or pore- the depth sensitivity of seismic signals, in combination with fluid contrast), an electric dipole is created, triggering an the fluid sensitivity of electromagnetic techniques, we can...

... an anisotropic multimode joint Rayleigh- and Love-wave inversion. We analyze the effect Obtaining anisotropic near surface elastic properties is of of elastic anisotropy on surface wave phase velocities, the interest for engineering, environmental, and geophysical sensitivity of different surface wave modes...

... sensitivity exploration geophysicist 10 splitting upstream oil & gas brine fractured rock stiffness tensor gas saturation frequency applied geoscience effective stiffness tensor fracture different scale Some problems of recognizing oriented fractures at different scales with the help...

...Sensitivity and uncertainty of PP- and PS-Joint Zoeppritz AVO inversion: Eagle Ford case study Un Young Lim*, Chevron CTC (formerly Texas A&M University), Richard L. Gibson Jr., NanoSeis (formerly Texas A&M University), and Nurul Kabir, formerly Texas A&M University SUMMARY contrasts in properties...

... model for the wave, mechanics or porosity and permeability, etc. The main sensitivity of physical parameters of natural gas hydrate is research method is artificial core simulation and numerical established on the basis of Analytic hierarchy process. The simulation, which results in the limitation...

... 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...