Inversion-based petrophysical interpretation of logging-while-drilling nuclear and resistivity measurements
O Ijasan, C Torres-Verdín, WE Preeg - Geophysics, 2013 - pubs.geoscienceworld.org
Interpretation of borehole measurements acquired in high-angle (HA) and horizontal (HZ)
wells is challenging due to the significant influence of well trajectory and bed geometrical …
wells is challenging due to the significant influence of well trajectory and bed geometrical …
Tutorial: Organic Mudstone Petrophysics, Part 2: Workflow to Estimate Storage Capacity
K Newsham, J Comisky, R Chemali - Petrophysics, 2019 - onepetro.org
This is the second of a three-part tutorial describing a workflow for evaluating
unconventional resources including organic mudstones and tight siltstones. Part 1 reviewed …
unconventional resources including organic mudstones and tight siltstones. Part 1 reviewed …
A fast forward algorithm of azimuthal gamma imaging logging while drilling
C Zong, J Liu, Z Liu, Y Liu, C Wang, H Gao… - Applied Radiation and …, 2023 - Elsevier
Logging while drilling (LWD) technology can evaluate the formation interface and
stratigraphic properties around the borehole in real time, so as to adjust the drilling trajectory …
stratigraphic properties around the borehole in real time, so as to adjust the drilling trajectory …
Efficient Bayesian inversion of borehole geophysical measurements with a gradient‐based Markov chain Monte Carlo method
Well logs are geophysical measurements of rock properties acquired continuously along a
borehole. Because of the physics underlying their operation, borehole logging instruments …
borehole. Because of the physics underlying their operation, borehole logging instruments …
Bayesian inversion for rapid multiwell interpretation of well logs and core data: Applications to unconventional organic-shale formations
Multimineral analysis is widely used to calculate in situ porosity, fluid saturation, and
mineralogy of rocks penetrated by a well. It delivers weight/volumetric concentrations of rock …
mineralogy of rocks penetrated by a well. It delivers weight/volumetric concentrations of rock …
Probabilistic petrophysical and compositional interpretation of well logs and core data via Bayesian inversion
T Deng - 2022 - repositories.lib.utexas.edu
A critical component of Formation Evaluation is the estimation of in situ petrophysical
properties and solid/fluid composition of rocks from multiple well logs and core laboratory …
properties and solid/fluid composition of rocks from multiple well logs and core laboratory …
Rapid forward modeling of multidetector logging-while-drilling Sigma measurements
E Ortega, C Torres-Verdín, WE Preeg - Geophysics, 2014 - pubs.geoscienceworld.org
Multidetector logging-while-drilling (LWD) Sigma was introduced to the oil industry to
measure neutron absorption cross section (Sigma) and radial length of invasion in shallow …
measure neutron absorption cross section (Sigma) and radial length of invasion in shallow …
Joint petrophysical interpretation of multidetector nuclear measurements in the presence of invasion, shoulder-bed, and well-deviation effects
Recent advances in logging-while-drilling sigma measurements include three-detector
thermal-neutron and gamma-ray decay measurements with different radial sensitivities to …
thermal-neutron and gamma-ray decay measurements with different radial sensitivities to …
High-efficiency Monte Carlo simulation based on CADIS method for Gamma Density Measurement
X Wang, Q Zhang - Annals of Nuclear Energy, 2023 - Elsevier
Formation density measurement is one of the most important part in reservoir hydrocarbon
evaluation, which relies on accurate acquisition of the detector energy deposition spectra …
evaluation, which relies on accurate acquisition of the detector energy deposition spectra …
A spectral nodal method for the adjoint SN neutral particle transport equations in X, Y-geometry: Application to direct and inverse multigroup source-detector problems
JP Curbelo, RC Barros - Annals of Nuclear Energy, 2021 - Elsevier
In this work, we apply an adjoint technique to solve two-dimensional direct and inverse
source-detector transport problems. In order to obtain the neutral-particle importance maps …
source-detector transport problems. In order to obtain the neutral-particle importance maps …