... Seismic waves propagating in fluid-saturated porous rocks exhibit attenuation and velocity dispersion in a broad range of frequencies. At sonic and ultrasonic frequencies, the attenuation is mainly controlled by the pore-scale fluid flow (squirt flow) and viscous shear relaxation mechanisms. I...

...: 11:00 AM Location: 351D Presentation Type: Oral reservoir characterization frequency selection relaxation optimization problem objective function waveform inversion artificial intelligence constraint conventional fwi wri upstream oil & gas initial model wavefield inversion...

... We present Lift and Relax for Waveform Inversion (LRWI), an approach that mitigates the cycle-skipping issue in full waveform inversion via a combination of two convexification techniques. The first technique (Lift) extends the set of variables in the optimization problem to products of those...

... Date: Wednesday, September 18, 2019 Session Start Time: 8:30 AM Presentation Time: 8:55 AM Location: 217C Presentation Type: Oral por relaxation relaxation time direction core plunger sample relaxation time characteristic geometric mean value spectrum log analysis oil saturation...

... that exhibit high miscible-gas-injection recovery potential. Presentation Date: Tuesday, September 26, 2017 Start Time: 11:00 AM Location: Exhibit Hall C/D Presentation Type: POSTER flow unit seg seg international exposition petroleum system relaxation fraction pore displacement efficiency...

... and observe the rate of pressure decay. These methods are difficult to apply to shale, because the permeability is so low that it is hard to measure the flux and the pressure decay. Moreover, none of these methods account for the viscoelastic relaxation during the measurement. Therefore, an effective method...

... haynesville sample correlation relaxation magnetic resonance niobrara sample well logging calculation saidian chlorite paramagnetic mineral tssa surface relaxivity surface area kerogen reservoir characterization paramagnetic mineral content prasad pore space sr calculation log...

... Summary Time-dependent stresses and strains in shales are related by the anisotropic creep and relaxation functions. Laboratory measurements of time-dependent creep are often limited to specific composition and mineral distribution. Moreover, creep data acquired for anisotropic rocks using...

...A short note on rank-2 relaxation for waveform inversion Augustin Cosse1 Stephen D. Shank2, and Laurent Demanet2 1 Harvard, SEAS and UCL, ICTEAM. 2 Department of Mathematics and Earth Resources Laboratory, Massachusetts Institute of Technology. SUMMARY This note is a first attempt to perform...

... traveltime algorithm 1 neighborhood calculation seg houston 2013 kernel traveltime source vertex relaxation operation Shortest path ray tracing on parallel GPU devices Jorge Monsegny , UP Consultorias and William Agudelo, ICP-Ecopetrol SUMMARY A new parallel algorithm for shortest path ray...

... drilling fluid management & disposal magnetic field susceptibility simulation reserves evaluation decay pore size upstream oil & gas relaxation inhomogeneous magnetic field resource in place estimate seg seg denver 2010 drilling fluids and materials estimates of resource in place...

... result in force imbalance which is mostly ignored in effective medium theories (EMTs). Elastic properties computed after the relaxation or equilibration of unbalanced forces are lower than those at unrelaxed states and are much closer to laboratory measurements than existing theoretical predictions...

... before and after frac job has been estimated using space time distribution of the microseismic events. At the beginning of frac job, the distribution of the microseismic events in space and time indicates a nonlinear behavior of pore pressure relaxation leading to a hydrofracture development. This makes...

... by the matrix paramagnetic mineralogy. In the paper NMR transverse relaxation time T2 of the volcanic breiccia samples have been measured with different echo spacing. The experimental results show that T2 measurement is strongly dependent of echo spacing because of internal magnetic field induced...

... laboratory measurements where multiple dielectric or magnetic relaxations are inferred to be superposed and it appears from theory in the diffusion regime. The latter can be discarded here as the realm of low-frequency electromagnetics. Electrolytic absorption from dissolved solids in groundwater generally...

... characterization fluid injection shapiro pressure perturbation hydraulic diffusivity relaxation upstream oil & gas pore pressure perturbation diffusion equation microseismic cloud perturbation probability signature microseismicity Reservoir Characterization Using Passive Seismic Monitoring...

... observed both macroscopically and microscopically, with no evidence of grain alignment. Fractures within the synthetic sandstones were controlled by forming the core under a range of known forming stresses (s F ), and after relaxation, studying the effects of the induced fracture system using petrophysical...

... ABSTRACT No preview is available for this paper. upstream oil & gas variation stress-induced anisotropy wave propagation seg 1999 application reservoir characterization synthetic core seismic wave propagation relaxation propagation orthogonal velocity anisotropy...

... anisotropic media anisotropy mechanism wave theory equation relaxation modeling Ground-penetrating radar: Wave theory and numerical simulation in lossy anisotropic media José M. Carcione, Ossevatorio Geofisico Sperimentale PP8.15 ABSTRACT Modeling radio waves in a realistic medium requires the sim...

... characteristics (Kenyon et al., 1989) and residual oil saturation (Neuman and Brown, 1982; Chandler et al., 1987) through the free fluid index (FFI) and the longitudinal spin-lattice relaxation time T,. Generally, measured NMR signals seem to respond to a complex interaction between inter-dependent factors...