... and the action of surface paramagnetic ions. The new model explains the T 1 frequency and temperature sensitivity of various fluids on the surface of glass beads. Godefroy (2002) carried out T 2 temperature experiments on carbonate rocks with T 2 single peak distribution and pure sandstone...

... resistivity tool. The higher frequencies were carefully chosen to improve the measurability of the quantities. A detailed modeling study was performed to investigate the tool characteristics including (1) depth of investigation, (2) vertical resolution, (3) sensitivity to resistivity anisotropy, (4) borehole...

... 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...

... 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...

...-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...

.... The gas sensitivity of FNXS and ∑ for CO 2 monitoring in the reservoirs are analyzed, a CO 2 monitoring method combining FNXS and ∑ is established. The CO 2 saturation can be calculated without formation porosity information, and the gas detection accuracy is improved. Using the element content...

... well logging annual logging symposium neutron reservoir characterization detector inelastic gamma ray fast neutron upstream oil & gas sensitivity porosity thermal neutron log analysis rit 21 pulsed neutron system field distribution cross section evaluation gas saturation...

... 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...

.... well logging shale oil complex reservoir oil shale reservoir characterization shale gas structural geology quantification acquisition mode sensitivity porosity bone spring reservoir property log analysis us government upstream oil & gas annual logging symposium spwla 63 unc mode...

.... The key to this tool is differ- ent density sensitivities of two detectors at different dis- ent detectors, characterized by their relative locations, tances to source. The horizontal axis of the spine-and-rib have different level of sensitivity to the variation of ce- plot is the near-distance detector...

... of string structure due to an extremely low sensitivity and bond between the cement and the pipe, and between the Signal-to-Noise (SNR) ratio. Therefore, it is important to cement and the formation. To obtain a highly accurate develop novel technology and apparatus that can measurement, however...

... geomechanical workflow. The second method interpret, especially when choosing values for the uses the velocities normalized for the changing mineral and fluid endpoints. This difficulty is always petrophysical properties, together with the stress caused by stress sensitive formations where dipole sonic...

... asymptote, respectively. The Thomsen parameter can be estimated in a vertical well from dispersive borehole sonic modes only if the mud velocity and density are known. All these unknowns may exhibit strong dependencies among each other, as observed from dispersion sensitivity analysis. Consequently...

.... We develop a new fast and accurate forward algorithm using spatial sensitivity functions (SSF). The SSFs quantify the NMR porosity dependence on spatial formation property perturbations. The discrete adjoint method (DAE) is employed to efficiently calculate the SSF. Accordingly, a three-dimensional...

... directly related to carbon dioxide. Furthermore, lost production related to corrosion failures further costs the oil and gas industry tens of billions of dollars in lost revenue annually. Multivariate optical computing (MOC) is an optical analysis technique that has been shown to match the sensitivity...

... oilfield conditions. Upstream Oil & Gas log analysis well logging PEF detector experimental x-ray tool formation density x-ray tool resolution sensitivity measurement detector density tool spwla 59 repeatability cs source Schlumberger photon Symposium x-ray generator vertical...

... based on careful acquisition mode design with tailored sensitivity to known formation properties and expected reservoir fluids. Significant improvements in speed require a multifrequency approach in which data across multiple DOIs are used simultaneously. One focus of this work is to address...

.... Finally, the paper includes a discussion of the results obtained when the four models were applied to some actual deepwater Gulf of Mexico (GOM) well data. log analysis macroporosity sensitivity machine learning Upstream Oil & Gas anisotropic sand Artificial Intelligence water saturation...

... quantitative measurements of casing thickness and inner diameter (ID). The tool also provides a comprehensive analysis of casing material properties. A patented four-segment (quadrant) receiver incorporated within the tool mandrel measures the casing thickness with a 90° circumferential sensitivity based...