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Keywords: magnetic resonance
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Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 28–30, 2015
Paper Number: SPE-175050-MS
... Abstract The simultaneous measurement of T 1 and apparent- T 2 relaxation times of a movable fluid with a nuclear magnetic resonance (NMR) logging-while-drilling (LWD) tool significantly increases the robustness of measured porosity at elevated rates of penetration. A new processing method...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 28–30, 2015
Paper Number: SPE-175120-MS
... Abstract The interpretation of the Nuclear Magnetic Resonance (NMR) T 2 distribution as a pore size distribution assumes homogeneous surface relaxivity, single-phase fluid saturation, and the absence of diffusion of spins across pores. Although these assumptions are true for homogeneous...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 27–29, 2014
Paper Number: SPE-170652-MS
... to estimate wettability, utilizing low-gradient magnetic resonance technology. Core data, core flood experiments, advanced fluid sampling and dynamic temperature anomaly evaluations are integrated to investigate the pore-scale complex fluid distributions and connectivity of varying wettability systems...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–24, 2008
Paper Number: SPE-115699-MS
... potential in un-produced reservoir zones. The well was drilled in a carbonate with variations in rock quality and with minor sub-faulting occurring. Gamma, Resistivity, Density, Neutron, and Image services were used in the horizontal part of the well in addition to Magnetic Resonance. To achieve the best...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, November 11–14, 2007
Paper Number: SPE-109863-MS
... production. The combination of magnetic resonance acquired permeability estimates and rock mechanical models adjusted by image enhanced petrophysics provided effective input to modify the stimulation design and enable economic completions for gas sands that were very close to stacked water sands. Around...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 26–29, 2004
Paper Number: SPE-89978-MS
.... The principle of flow measurement adopted is based on nuclear magnetic resonance (NMR). NMR is suited to flow evaluation in this industry due to the fluids present, i.e. water and hydrocarbon (gas or liquid). These fluids contain 1 H and 13 C nuclei which are important to NMR measurements. Unlike conventional...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 29–October 2, 2002
Paper Number: SPE-77395-MS
... MR logging exploits the effect of Nuclear Magnetic Resonance (NMR). NMR is a consequence of the intrinsic magnetic moment of protons and neutrons. For most atoms, such as 12 C and 16 O, the individual magnetic moments of protons and neutrons offset each other, and the effective magnetic moment...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 27–30, 1998
Paper Number: SPE-49008-MS
... Abstract Effective interpretation of nuclear magnetic resonance (NMR) logs in shaly sands requires an understanding of the NMR contribution of clays. Of particular importance is the role of clays in the rapidly relaxing part of the NMR signal. In this study we measured the transverse...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 5–8, 1997
Paper Number: SPE-38737-MS
... Abstract In standard magnetic resonance processing, the porosity is partitioned into free fluid and bound fluid volumes. All components in the T2 distribution less than a lithology-specific T2 cutoff are assigned to the bound fluid, while all components greater than that cutoff are assigned...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 6–9, 1996
Paper Number: SPE-36522-MS
... Abstract Pulsed nuclear magnetic resonance (NMR) logging has until now been limited to measurements of capillary bound water and of free fluids, the sum of which is considered the "effective porosity" of rock. Clay-bound water and fluids trapped in micropores generally exhibit NMR relaxation...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 22–25, 1995
Paper Number: SPE-30561-MS
... on the measurement. Nuclear magnetic resonance logging, however, responds only to the fluids in the pore spaces of the rock matrix. The NMR porosity is proportional to the number of hydrogen nuclei in the pore spaces and is determined by integrating the amplitude of the transverse relaxation (T2) distribution. 1...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 3–6, 1993
Paper Number: SPE-26470-MS
... nature of this surface interaction ( 2 , 10 ). Abstract It has recently become possible to make pulsed nuclear magnetic resonance (NMR) measurements of subsurface geological formations in situ. The longitudinal relaxation time, T 1 , has long been the parameter of greatest interest...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 3–6, 1993
Paper Number: SPE-26472-MS
... ABSTRACT * Nuclear magnetic resonance (NMR.) has long been recognized for its potential as a well logging method for measuring pore size and permeability. NMR spin–lattice and spin–spin relaxation times, T 1 and T 2 , respectively, are typically used in these applications because...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 23–26, 1990
Paper Number: SPE-20561-MS
... Abstract The paper describes the first spin echo Magnetic Resonance Imaging Logging (MRIL * ) system. The system makes measurements while logging and does not require special borehole treatment. The tool employs static and radio-frequency magnetic fields to perform downhole the spin-echo...

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