Browsing Earth Resources Laboratory by Title
Now showing items 328-347 of 456
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Pore Geometry And Permeability Modeling From Pressure Dependence Of Transport Properties In Sandstone
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1989)In this paper, a model of the pore geometry of sandstones is proposed. Three categories of pores are considered: large spherical pores at 4-grain vertices, tube-like throats at 3-grain edges and narrow sheet-like throats ... -
Pore Scale Modeling of Rock Properties and Comparison to Laboratory Measurements
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)The microstructure of a porous medium and the physical characteristics of the solid and fluid phases determine the macroscopic transport properties of the medium. The purpose of this paper is to test numerical calculations ... -
Pore-Scale Simulation Of Experimentally Realizable, Oscillatory Flow In Porous Rock
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)We report new simulations of oscillating flow in porous rock. Our goal is to better understand the frequency dependence of pore-scale fluid motion, which should ultimately help us to interpret attenuation and electroseismic ... -
Predicting stress-induced anisotropy around a borehole
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)Formation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This could result in a biased estimation of formation properties but could provide ... -
The propagation and linkage of normal faults: Insights from the Strathspey-Brent-Statfjord fault array, northern North Sea
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2001)Through examination of the scaling relations of faults and the use of seismic stratigraphic techniques, we demonstrate how the temporal and spatial evolution of the fault population in a half-graben basin can be accurately ... -
Propagation Of Flexural Waves In An Azimuthally Anisotropic Borehole Model
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1993)Flexural waves generated by a dipole source have been studied theoretically and used to estimate the shear parameters of a formation. The basic principles and main properties of flexural waves propagating in a borehole ... -
Quantitative tools for seismic stratigraphy and lithology characterization
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2001)Seismological images represent maps of the earth's structure. Apparent bandwidth limitation of seismic data prevents successful estimation of transition sharpness by the multiscale wavelet transform. We discuss the application ... -
Radiation Patterns Of Compressional And Shear Transducers At The Surface Of An Elastic Half Space
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)The radiation patterns of an elastic wave field generated by circular plane compressional and shear transducers are derived using the method of steepest descent. These patterns contain both effects of the elastic half ... -
Rapid 3-D Raytracing For Optimal Seismic Survey Design
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)A useful approach to optimal seismic survey design is to simulate the seismic response for a suite of a priori subsurface models and shot-receiver templates. The response can be used to evaluate many criteria such as ... -
Real-time ensemble control with reduced-order modeling
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)The control of spatially distributed systems is often complicated by significant uncertainty about system inputs, both time-varying exogenous inputs and time-invariant parameters. Spatial variations of uncertain parameters ... -
Recursive Imaging with Multiply-Scattered Waves Using Partial Image Regularization: A North Sea Case Study
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)As more resources are directed toward reverse-time migration an accurate velocity model, including strong reflectors, is necessary to form a clear image of the subsurface. This is of particular importance in the vicinity ... -
Redatumming Through a Salt Canopy – Another Salt Flank Imaging Strategy
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)We describe a new short cut strategy to image the sediments and salt edge around a salt flank through an overburden salt canopy. We demonstrate its performance and capabilities on a synthetic acoustic seismic data from ... -
Reflection Moveout Inversion For Horizontal Transverse Isotropy: Accuracy And Limitation
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1998)Horizontal transverse isotropy (HTI) is the simplest azimuthally anisotropic model used to describe vertical fracturing in an isotropic matrix. Using the elliptical variation of P-wave normal-moveout (NMO) velocity with ... -
Reflection Moveout Inversion In Azimuthally Anisotropic Media: Accuracy, Limitation, And Acquisition
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)Parameter estimation from elliptical variations in the normal-moveout (NMO) velocity in azimuthally anisotropic media is sensitive to the angular separation between the survey lines in 2D, or equivalently source-to-receiver ... -
Registration-guided least-squares waveform inversion
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013-01-15)Full waveform inversion with frequency sweeping cannot start from zero frequency because of the lack of low-frequency data, requiring a good starting model. We study a di fferent iterative scheme where the notion of proximity ... -
Report Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)This report contains the results ot work completed during the fifth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.l.T. During this past year, the emphasis in our research ... -
Report Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)This report contains the results of work completed during the tenth year of the Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at M.l.T. This is the first year that the Consortium has been ... -
Report Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1988)This report contains the results of work completed during the sixth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT. Over the last six years, our work have evolved from ... -
Report Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1991)This report contains the results of work completed during the ninth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT. During the past year, we have started the evolution ... -
Report Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1993)This report contains the results of work completed during the eleventh year of the Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at M.LT. We continued our trend toward more general borehole ...
