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Now showing items 31-40 of 42
A comparison of short-circuited streaming potentials in Westerly granite from changes in the rock's volume, shape, saturation, and fracture under unconfined uniaxial compression
(Massachusetts Institute of Technology, 1999)
An experiment was designed to gain some insight into the phenomena of electrical charge in the uniaxially stressed environment of a sample of Westerly granite. Varying properties of size, shape, saturation, and stress rate ...
Fluid flow in porous media : NMR imaging and numerical simulation
(Massachusetts Institute of Technology, 1999)
We use nuclear magnetic resonance (NMR) imaging to obtain a three-dimensional image of the pore structure in a limestone core, 4.5 mm in diameter and 10 mm in length, with a resolution of 40 [mu]m. This image is converted ...
Compositional structure in the asteroid belt : results of a spectroscopic survey
(Massachusetts Institute of Technology, 1999)
Visible wavelength spectra have been obtained for 1189 main-belt asteroids during the second phase of the Small Main-belt Asteroid Spectroscopic Survey. These telescopic measurements were made using charge-coupled device ...
Permeability prediction in Benin River/Gbokoda field in Nigeria : a case study using facies derived from core studies and multiple regression of wireline data
(Massachusetts Institute of Technology, 1999)
Detailed understanding of the heterogeneities and complexity of reservoir architecture and flow properties are crucial to development and exploitation of commercial hydrocarbon reservoirs. Thus, reservoir characterization ...
Stellar occultation studies of Saturn's upper atmosphere
(Massachusetts Institute of Technology, 1999)
The properties of Saturn's upper atmosphere are not well-known despite several spacecraft flybys. However, the region of 1-100 [mu]bar can be studied in detail by observing stellar occultations -- when the planet passes ...
Elastic properties of sedimentary anisotropic rocks : (measurements and applications)
(Massachusetts Institute of Technology, 1999)
In multidisciplinary studies carried out in the Budare Oil Field of the Great Oficina Oil Field, there was difficulty matching well log synthetic seismograms with 2D and 3D seismic data. In addition, the seismically ...
Terminal proterozoic carbonate platform development : stratigraphy and sedimentology of the Kuibis Subgroup (ca. 550-548 Ma), Northern Nama Basin, Namibia.
(Massachusetts Institute of Technology, 1999)
A stratigraphic and sedimentologic investigation of the Kuibis Subgroup, northern Nama Basin, was undertaken. An U-Pb zircon age determination on an intercalated volcanic ash directly constrains the age of the subgroup to ...
Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method
(Massachusetts Institute of Technology, 1999)
We present an original method for estimating local shear wave birefringence properties for 3D surface P to S converted waves. To accomplish this we approach the problem using reverse VSP (RVSP). The method works in the ...
Relative sea-level rise and the development of channel-fill and shallow-water sequences on Cape Cod, Massachusetts
(Massachusetts Institute of Technology, 1999)
Channel-fill sediments located in shallow-water off the south shore of Cape Cod, Massachusetts, provide a record of the late-Pleistocene and Holocene geological evolution in a post-glacial setting. Though conventionally ...
Injection and movement of Tritium-³He in the Northeastern Atlantic
(Massachusetts Institute of Technology, 1999)
This thesis describes an attempt to build a box model of the circulation in the eastern North Atlantic and to use it with transient tracer data to infere rates of ventilation in the subtropcial thermocline. The starting ...