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Keywords: particle
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Proceedings Papers

Publisher: Society of Petrophysicists and Well-Log Analysts
Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0113
... of pore structures, among which intergranular pores are the most damaged (70.92 %), followed by feldspar dissolution pores (44.97 %), and kaolinite intercrystalline pores are the least damaged (33.57 %). Under the condition of HTHP, during the drilling cycle, the solid phase particles in the drilling...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0112
.... Veettil and Clark (2020) adapted sequential Monte Carlo (particle filter) for doing sequential interpretation with multiple realizations. The quality of the interpretation depends on the manually selected transition function and the number of simulated particles. The latter is a trade-off between...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0003
... speed upstream oil & gas phase velocity reservoir surveillance neural network reservoir characterization spwla 62 well logging underbalanced drilling frequency nd annual logging symposium spwla-2021-0003 spinner velocity doppler frequency shift particle velocity measurement doppler...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-MM
... log analysis frequency particle receiver casing and cementing Simulation detection well logging cement particle smart cement pipe Upstream Oil & Gas cement spwla 59 evaluation cement evaluation transmission integrity void frequency response configuration novel smart...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-AAAA
... detector particle neutron log analysis well logging modeling Simulation Library petrophysical inversion Upstream Oil & Gas MCNP spwla 59 Snupar input file Symposium cross section unstructured mesh detector response geometry source description nuclear parameter...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-LL
... techniques are available (Huang et al., 2015) that could potentially be applied to estimate the fluid distribution within the porous medium. Dissipative Particle Dynamics (DPD) is another mesoscopic method that has been applied to dynamic wetting simulations (Heinrich et al., 2007) and interfacial...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-Z
... that accounts for the effects of clay minerals, clay-sized particles, and conductive minerals on the conductivity and permittivity estimates. Modern induction tools measure the in-phase and quadrature signals with equal accuracy. The quadrature signal is expected to be small and positive, providing information...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-NN
... occurs when fine particles in the drilling mud go into the formation before or during mud cake buildup. Solids invasion could result in significant under-estimation of formation porosity. The transverse relaxation time (T2) of nuclear magnetic resonance (NMR) logs is also shortened due to the invasion...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-VV
... of clay, mud and silt. The important feature to note is that this definition does not describe the mineralogy but rather the grain size. In this definition, clay refers to clay sized particles, i.e. < 1/256 mm. Whilst clay can refer to grain size it can also refer to clay minerals, and it is the dual...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-GG
.... In practice one of the least understood components (by petrophysicists) is the drilling fluid or "mud", and its potential effects on the petrophysical measurements of the surrounding formations. well logging Upstream Oil & Gas particle filtrate correction drilling fluid selection...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-97677
... particles, we believe Hook meant to use the term oomold . Thirdly, we remind that if the hydrocarbon column is high enough and the forma- tion is water-wet, hydrocarbons can be injected to these micropores, and when reservoir hydrocarbon pressure is lowered by production, these pores can produce hydro...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-V
... log analysis paramagnetic sphere secular relaxation rate well logging relaxation rate relaxation free diffusion regime time scale concentration particle diffusion dependence motionally surface concentration gradient equation Upstream Oil & Gas regime paramagnetic particle...
Proceedings Papers

Paper presented at the SPWLA 46th Annual Logging Symposium, June 26–29, 2005
Paper Number: SPWLA-2005-ZZ
... design and sand strength/failure prediction. Textural descriptions are traditionally obtained via petro- graphic and petrological analysis including thin section analysis, particle sieving techniques and laser diffraction studies. All methods have limitations in quantitatively describing the full 3D rock...
Proceedings Papers

Paper presented at the SPWLA 44th Annual Logging Symposium, June 22–25, 2003
Paper Number: SPWLA-2003-Q
... code, and utilised the predicted fluxes at the detector locations to train a set of neural networks. The deterministic code is based on the multi-group energy approximation, and solves the Boltzman transport equation for neutral particles using a variational discretisation procedure based on the even...
Proceedings Papers

Paper presented at the SPWLA 40th Annual Logging Symposium, May 30–June 3, 1999
Paper Number: SPWLA-1999-T
... well logging compliance coefficient Reservoir Characterization Upstream Oil & Gas Modeling & Simulation coefficient porosity Poisson inversion pore compliance coefficient elastic coefficient Gurevich particle Claystone clay mineral Goldberg log analysis transition...
Proceedings Papers

Paper presented at the SPWLA 39th Annual Logging Symposium, May 26–28, 1998
Paper Number: SPWLA-1998-F
... mud weight barite particle Baker Hughes INTEQ drilling fluids and materials attenuation ultrasonic attenuation oil-based mud ultrasound drilling fluid selection and formulation Upstream Oil & Gas shear rate drilling mud ultrasonic velocity transducer particle relaxation shear...
Proceedings Papers

Paper presented at the SPWLA 37th Annual Logging Symposium, June 16–19, 1996
Paper Number: SPWLA-1996-UU
... for the evaluation of water saturation of the terrigenous rock. Upstream Oil & Gas Waxman sandstone water saturation evaluation electric field well logging advanced theory electrical conductivity conductivity model pore space terrigenous rock particle evaluation Symposium experimental data...
Proceedings Papers

Paper presented at the SPWLA 34th Annual Logging Symposium, June 13–16, 1993
Paper Number: SPWLA-1993-B
... Upstream Oil & Gas data quality wellsite log analysis cutting well logging gamma-ray log Shale Shaker fraction contamination particle mineralogy determination sidewall mineralogy mud solid laboratory Symposium drilling mud calculation gamma ray gamma-ray data spwla 34th...
Proceedings Papers

Paper presented at the SPWLA 33rd Annual Logging Symposium, June 14–17, 1992
Paper Number: SPWLA-1992-P
... formation sigma particle porosity Upstream Oil & Gas spwla 33rd gamma ray Symposium cross section computer model fluid saltwater formation fluid saltwater borehole fluid saltwater Artificial Intelligence pnd tool borehole saltwater kppm NaCl equation SPWLA 33rd Annual Logging...
Proceedings Papers

Paper presented at the SPWLA 32nd Annual Logging Symposium, June 16–19, 1991
Paper Number: SPWLA-1991-G
... ABSTRACT Water saturated shaly sandstones exhibit a strong dielectric dispersion at frequencies below 106 Hz, that is mainly related to the ionic diffusion in the electrolyte surrounding the clay particles. Assuming a coupled electro-diffusional mechanism occurring in a Guoy-Cbapman double...

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