...SPWLA 65th Annual Logging Symposium, May 18-22, 2024 DOI: 10.30632/SPWLA-2024-0062 MAXIMISING LOOK AHEAD SENSITIVITY TO PRESALT RESERVOIR IN A NEAR VERTICAL SCENARIO IN THE PRESENCE OF INTRA SALT INTERCALATIONS: CASE STUDY IN BACALHAO FIELD, OFFSHORE BRAZIL Armando Vianna, Enrico Ferreira, Sergey...

... not rigorously and consistently incorporate known measurement sensitivities and uncertainties, and can vary between log analysts. In unconventional reservoirs, they also rely on user inputs of kerogen thermal maturity and hydrocarbon properties, which can be difficult to ascertain a priori. This underscores...

... ABSTRACT Deep-sensing borehole electromagnetic (EM) measurements are sensitive to the three-dimensional (3D) electrically conductive formations surrounding the wellbore. Spatial imaging of those formations is commonly accomplished via 3D inversion of the multi-frequency and multi-source...

.... This configuration enables four types of measurements: symmetrized directional, anti-symmetrized directional, deep resistivity, and T6 first and second harmonic anisotropy. Each of these types has a sensitivity to various aspects of formation changes (Sun et al. 2021). Symmetrized directional. Symmetrized...

... ABSTRACT Ultradeep azimuthal resistivity (UDAR) electromagnetic measurements provide full 3D volumetric sensitivity to the surrounding formation and are routinely used for strategic geosteering, reservoir mapping, reservoir characterization, and real-time drilling decision-making based...

...SPWLA 65th Annual Logging Symposium, May 18-22, 2024 DOI: 10.30632/SPWLA-2024-0105 NOVEL THROUGH-TUBING CASING MEASUREMENT WITH AZIMUTHAL SENSITIVITY FOR GAME-CHANGING PROACTIVE MULTI-CASING CORROSION MEASUREMENT Matthew Gavin, Andrew Smith, Marc Ramirez, Sushant Dutta, Jun Zhang, Adam Ostrowski...

..., such as apparent resistivity and symmetrized and antisymmetrized directional curves, and the completely new deep resistivity and T6 first and second harmonic anisotropy measurements. Each of these measurements has sensitivity to distinct aspects of formation changes (Sun et al., 2021) Symmetrized directional...

... to the assumption of the global anisotropy. This paper provides a detailed sensitivity study of UDAR measurements to the local anisotropy effect, evaluating inversion uncertainty to horizontal and vertical resistivities under different formation conditions. The information further enables the current inversion...

... geology porosity geologist rock type neutron porosity annual logging symposium carbonate rock well logging neutron spwla 65 th annual logging symposium neutron generator salinity detector evaluation sedimentary rock mineral log analysis thermal neutron sensitivity china...

... geologist geology well logging log analysis detector spwla-2024-0118 geant4 experiment rock type th annual logging symposium spwla 65 sigma reservoir characterization simulation disturbance experiment fsf pt neutron projection sensitivity isf pt algorithm contribution...

.... Due to the restrictions and safety issues associated with the Am-Be neutron source, it has been gradually replaced by D-T source. The energy of neutrons emitted from D-T sources is signi cant higher than that of the Am-Be source, resulting in reduced sensitivity of the instrument. At present, related...

... 4.59441 3.01827 0.49376 Al6061 alloy 2.808 3.84059 2.70474 0.33171 Natron 1.470 0.51671 1.56176 0.03056 Carnallite 1.600 4.08931 1.63545 0.25074 PE MEASUREMENT Pe logs are often a byproduct of gamma-gamma density tools. The measured gamma-ray energy spectra of density tools are sensitive to both density...

... a systematic study on the relation between water adsorption and wettability. We experimentally compute water adsorption isotherms and perform sensitivity analysis on the impacts of (i) wettability levels, (ii) types of rock components, and (iii) concentrations of mineral constituents on water adsorption...

... logging geologist asia government porosity instrument neutron porosity clastic rock china government reservoir characterization information sensitivity detection sensitivity east china gamma neutron instrument annual logging symposium detector spectrum upstream oil & gas rock type...

... permeabilities and sensitivity to wettability. Physical steady-state and digital relative permeabilities on several core plugs and subsets are compared in this study, which discusses the advantages of performing both as part of the formation evaluation process. The physical and digital results compare...

... logging mudstone noise transmitter-receiver spwla-2023-0048 deep-sensing borehole electromagnetic measurement acquired em instrument sensitivity spwla 64 university sandstone reservoir SPWLA 64th Annual Logging Symposium, June 10 14, 2023 DOI: 10.30632/SPWLA-2023-0048 LIMITS OF 3D...

... including (1) depth of investigation, (2) vertical resolution, (3) sensitivity to resistivity anisotropy, (4) borehole and tool eccentricity effects, and (5) azimuthal resolution capability. To test the tool design, prototype tools were built for lab experiments and field trials. To verify the accuracies...

... sedimentary rock fluid dynamics united states government geology upstream oil & gas geologist asia government flow in porous media reservoir characterization th annual logging symposium spwla 64 petroleum rock type well logging sandstone spectrum sensitivity diffusion...

...-Drilling (LWD) propagation-resistivity tools, the dielectric permittivity of the formation inverted from the measurements show a good sensitivity to water-filled porosity while maintaining an acceptable insensitivity to water salinity, in clean carbonates and low-clay volume clastics. LWD surveys also...

... Abstract To appraise the look-around and look-ahead technologies used in geosteering, an extension to the sensitivity function is presented by considering jointly with the resolution. The development is of critical importance to the data interpretation of LWD azimuthal electromagnetic tools...