.... These effects can be observed in logging-while-drilling (LWD) and wireline (WL) NMR logs, where the NMR distributions may exhibit appreciable differences even though both were acquired in the same formation. We implement a pore-size-dependent fluid substitution (PSDFS) method to transform a nuclear magnetic...

... the challenges mentioned above. The workflow builds on recent advancements to extract maximum information from minimal NMR data acquisition, such as factor analysis, a statistical method to determine various T2 cutoffs, and fluids substitution, a method to replace all hydrocarbons with water in T2 distribution...

... based on spatial sensitivity functions. The latter is combined with Backus averaging when bed thicknesses are smaller than the length of the receiver array to honor the long-wave equivalence requirements for a homogeneous anisotropic effective medium. Two synthetic fluid substitution examples underline...

...SPWLA 60th Annual Logging Symposium, June 15-19, 2019 DOI: 10.30632/T60ALS-2019_MM 1 INTEGRATED RESERVOIR CHARACTERIZATION IN DEEPWATER GULF OF MEXICO USING NUCLEAR MAGNETIC RESONANCE (NMR) FACTOR ANALYSIS AND FLUID SUBSTITUTION Tianmin Jiang, Jason Gendur, Li Chen, Weixin Xu and Dan Shan...

...SPWLA 57th Annual Logging Symposium, June 25-29, 2016 1 NMR T2 FLUIDS SUBSTITUTION Chanh Cao Minh, Vikas Jain, Roger Griffiths, David Maggs (Schlumberger) Copyright 2016, held jointly by the Society of Petrophysicists and Well Log Analysts (SPWLA) and the submitting authors. This paper was prepared...

... ABSTRACT: A new model is presented, which extends the application of rock physics modelling, fluid substitution included, to any combination of minerals and making it suitable for application in most petroleum bearing porous formations. A mixing law based in an approximation to the Biot poro...

... invasion on measured slowness values by fluid-substitution modeling. Shear data from WL dipole and the LWD quadrupole tools are compared in this regard. Interpretation of the acoustic LWD data sets is enhanced by additional information from the standard LWD data and LWD density images in combination...

... ABSTRACT The Gassmann equation is probably the most commonly model for fluid substitution. To apply it, the user has to estimate the properties of the fluid and rock mixtures within the reservoir formation. The question of how to characterize and mix fluids has received a lot of attention...

... to determine coefficients for predicting "wet" sonic logs throughout the interval of interest. This obviates the need for fluid substitution from the as-logged condition to a standard condition such as dry flame or water filled, and bypasses the uncertainties associated with questions about the relative...

.... These are the rock's density and its dynamic elastic moduli. The term "Fluid Substitution" is generally taken to be the investigation of how the rock properties, and therefore the seismic response, vary as a function of change in fluid type within a rock's pore space. To understand how changing, or substituting...