... ABSTRACT Nuclear magnetic resonance (NMR) technology is essential for evaluating fluid mobility and pore structure. However, the relaxation time of shale oil is significantly influenced by its fluid composition, pore types (organic and inorganic), and temperature. In most rock pore media...

..., primarily manifesting as: (1) excessive smoothing that leads to inconsistent regularization, resulting in substantial peak overlaps and diminished spectral resolution; and (2) considerable uncertainty in estimating short relaxation times, particularly exacerbated by low Signal-to-Noise Ratio (SNR...

... reservoir size distribution spwla 63 core plug cutting annual logging symposium nmr sequence university pore surface fluid procedure rd annual logging symposium porosity plug relaxation time SPWLA 63rd Annual Logging Symposium, June 10-15, 2022 DOI: 10.30632/SPWLA-2022-0062 VALIDATION...

... porosity spwla 61 porosity undercall middle burgan formation artificial intelligence information oil saturation reservoir characterization well logging upstream oil & gas july 29 relaxation time flushed zone spwla-5013 density porosity burgan field st annual logging symposium june 24...

... from the nuclear magnetic response. Both relaxations are sensitive to the pore surface-to-volume ratio. Lithologies exhibit several pore sizes, and the analysis of raw NMR data results in a distribution of relaxation times reflecting the contributions of each pore size. In the present study, the Classi...

... of organic-rich tight rocks, the interpretation of fluid saturation using only one-dimension distribution of T2 relaxation time (1-D T2) is not unique. Two dimensional T1–T2 maps (2-D T1–T2) provide a better approach to define phases and their saturations when applying both T2 and T1:T2 ratio cutoffs...

... (Mitchell & Fordham 2014). log analysis Berea sandstone spwla 60 Symposium Artificial Intelligence new apparatus ultrasonic measurement saturation relaxation time well logging Brine core holder apparatus Rock Core p-wave velocity Upstream Oil & Gas NMR supercritical co 2...

... and to obtain the highest-resolution data, respectively. It has been demonstrated that the relaxation-time dependence of light oil is proportional to viscosity over temperature. The temperature dependence of bitumen or heavy viscous oil relaxation times is proportional to viscosity over temperature with a power...

... logging saturation resolution reservoir porosity gradient information stationary measurement noise acquisition inversion relaxation time unconventional reservoir SPWLA 59th Annual Logging Symposium, June 2-6, 2018 FOCUSED NUCLEAR MAGNETIC RESONANCE M. Bacciarelli, Pedro A. Romero Rojas...

.... The results showed that both the complex compounds and nanoparticles were able to reduce the transverse relaxation time of oil from longer than 2 s to less than 20 ms. To demonstrate their applicability in porous media, we injected doped oil into gas-saturated Berea sandstone and limestone core plugs...

... ABSTRACT Accurate estimation of petrophysical properties such as porosity, bound and free fluid volumes is a critical component of reservoir characterization. NMR T 2 relaxation time measurements are routinely used for characterization of conventional and unconventional reservoirs. However...

... surface relaxivity inter-granular pore bitumen extraction heptane calibration sample Symposium log analysis relaxation time concentration toluene kerogen correlation map SPWLA 58th Annual Logging Symposium, June 17-21, 2017 EFFECTS OF BITUMEN EXTRACTION ON THE 2D NMR RESPONSE OF SATURATED...

.... The role of clay and high-Z minerals on NMR relaxation time and permeability for a Middle East tight sand. The new transforms developed for the Middle East tight sandcan be used to calculate permeability along a wellbore from NMR wireline and/or LWD log data. The permeability results, the permeability...

.... Furthermore, combining with a suite of NMR pulse sequences allows obtaining multi-dimensional correlation distributions between gas adsorption energy with chemical shift, T 1 , or T 2 relaxation time, which accurately quantifies gas adsorption in different pore types, different pore sizes, different...

... porosity shale formation regularization Symposium short burst relaxation time CBW pore size permeability IP pore saturation activation SPWLA 57th Annual Logging Symposium, June 25-29, 2016 USING NMR TO CHARACTERIZE FLUIDS IN TIGHT ROCK UNCONVENTIONAL AND SHALE FORMATIONS Boqin Sun, Elton Yang...

..., especially of the fast-relaxing components. Diffusion measurements also play a unique role in the identification of the producible fluid having relaxation times of several tens of milliseconds. A comparison of 2D NMR T 1 - T 2 measurements on the Upper Bakken source rock with the Middle Bakken and Three...

... Oil & Gas well logging spwla 57 drainage coefficient interpretation Indiana limestone surface relaxivity relaxation time Simulation fraction wettability saturation voxel SPWLA 57th Annual Logging Symposium, June 25-29, 2016 MICRO-CT ASSISTED INTERPRETATION OF NMR RESPONSES...

... the relationship between pore geometry, surface magnetic properties, and NMR transverse relaxation time. Moreover, synthetic laminated systems of two different grain diameters with varied layer thickness were made and high-resolution micro-CT images obtained. Low field NMR experiments were carried out at 100...

... imaging Symposium relaxation time liquid porosity wettability log analysis fluid type residual oil spwla 56 reservoir University NMR data characterization SPWLA 56th Annual Logging Symposium, July 18-22, 2015 SUBSURFACE FLUID CHARACTERIZATION USING DOWNHOLE AND CORE NMR T1T2 MAPS COMBINED...

... Abstract We quantify the impact of fracture-pore diffusional coupling on permeability assessment using nuclear magnetic resonance (NMR) measurements in complex formations. NMR T 2 (spin-spin relaxation time) distribution has been conventionally considered insensitive to the presence...