Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 44 for “"VSP"”.
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Characterizing intrinsic and stratigraphic Q in VSP data with information measures
… In a zero-offset vertical seismic profiling (VSP) data set, at any instant in time we have access to a snapshot of the seismic wavefield along the principal direction of wave propagation. In practice, such a snapshot has the form of discrete amplitude values being assigned to each of a set of …
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Shear and compressional analysis of VSP in Silo field, Denver-Julesburg Basin
Includes bibliographical references.
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Improvements on conventional VSP processing and the use of spatial median filters
Includes bibliographical references.
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Analysis of the repeatability of time-lapse 3D VSP multicomponent surveys, Delhi field
… noise. In this project, two 3D multicomponent VSP surveys acquired in Delhi Field were used to quantify the relative contribution of each factor that can affect the repeatability in land seismic data. The factors analyzed in this study were: source and receiver geometry inaccuracies, variations …
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Elastic time-reverse imaging and transmission tomography for microseismic and DAS VSP data
Wavefield migration and tomography are considered to be state-of-the-art methodologies used for subsurface geological characterization. Seismic tomography produces accurate velocity models that commonly serve as input into seismic migration algorithms that produce high-quality passive-source (e.g., …
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Processing of DAS and geophone VSP data from the CaMI Field Research Station
… and processing of Vertical Seismic Profiles (VSP) were undertaken for this thesis. More specifically, the analysis of three different surveys: a walk around VSP for azimuthal anisotropy analysis, zero offset VSPs to test the emerging DAS technology and walk-away VSP to obtain imaging results …
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Protein coding transcription and control of vsp gene expression in the protozoan parasite Giardia lamblia
… encoded by a family of genes known as the vsp genes. A single trophozoite expresses only one vsp at a time and it has been previously determined that steady state mRNA of only the expressed vsp is detectable in Northern blots. Our nuclear run-on assays indicated transcription of only the …
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Tomographic velocity model building in high-fidelity seismic depth imaging of near surface and VSP settings
… acquired under a vertical-seismic-profiling (VSP) geometry. I develop a joint DLT that utilizes both the P-wave and converted-wave traveltimes to invert for the salt flank geometry. In a physical model test, the joint DLT delineates the flank geometry of the salt model accurately. In addition, …
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Imaging a Hydraulically Fractured Bakken Shale Reservoir Using 4D-Tomography and Reverse VSP Techniques with Perforation Shot Sources
… yielding approximately N70oE using a reverse VSP walkaround technique. Two high-frequency 2D seismic images of the overburden layers with a dominant frequency of roughly 300 Hz were obtained. Their dimensions are about 600 m high and 1200 m long. In stacked oil shale plays, the perforation …
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Vegetative storage protein accumulation and physiological changes occurring within interior spruce seedlings
… The 30 kD and 27 kD vegetative storage proteins (VSP) appeared after vegetative maturity (budset) and accumulated during the development of rest and the acquisition of cold hardiness. This trend was observed in bud extracts of three seedlots QL, EK, and PG as well as in the ambient treatment …
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Elastic Properties of Rock Salt: Lab Measurements, Numerical and Physical Modeling, and Gulf of Mexico Well Logs and VSP
… measurements, well logs, and a salt proximity VSP survey. In the lab, I analyzed the effects of composition, crystalline structure, pressure, and temperature on the elastic behavior of a variety of rock salt samples, includ- ing pure halite (>95 wt.%) from the Gulf Coast, argillaceous rock salt …
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Estimating Seismic Anisotropy: Fluid Substitution Theory, 3D-Printed Inclusion Models, and Multi-Component 3D VSP in the Bakken Shale
… processed zero-offset, walk-away and walk-around VSP data in the Bakken shale, North Dakota, provided to us by Hess Corporation. I found that there was strong polar anisotropy in evidence from the VSP data in the Mission Canyon, Lodgepole, and Bakken formations. Thomsen’s anisotropy parameters for …
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Effect of Training Systems on Viognier (Vitis vinifera L.) Grape and Wine Glycosides and Volatile Compounds
… design consisting of Vertical Shoot Positioned (VSP), Smart Dyson (SD), and Geneva Double Curtain (GDC), and evaluated for the effects on grape and wine glycosides and volatile compounds. Fruit was harvested at the same Brix each season, and differences in berry weights were not observed. …
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A Multicomponent Walkaway Vertical Seismic Profile Experiment in a Heavy Oil Reservoir
A multicomponent walkaway VSP experiment was successfully processed and used to predict rock properties in a heavy oil reservoir. Post-stack image and pre-stack gathers were made for inversion and AVO analysis. A common shot reflectivity gather was also created for AVO study at the VSP well …
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Reservoir characterization using intelligent seismic inversion
… wireline-log data. Vertical seismic profile (VSP) is used as an intermediate step between the well logs and the surface seismic. Generalized regression neural network (GRNN) is used to build two correlation models between; (1) Surface seismic and VSP, (2) VSP and well logs both using synthetic …
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Higher Layer Protocols for a Workstation Architecture (Networking, Operating System)
This thesis presents WorkNet and the VSP (Virtual Service Protocol). WorkNet is an extension of transport layer protocols and interprocess communications mechanisms. VSP is an original presentation layer protocol. These protocols are tailored to workstations connected via a local area network. …
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Shall we dance? : investigating protein interactions implicated in Escherichia coli postreplicative mismatch repair using a bacterial two hybrid system
… of Vsr, primary player of very short patch (VSP) repair. This study made use of the bacterial two hybrid system in an attempt to further clarify the critical role that each of the above-mentioned proteins plays relative to one another. Our initial goal was to determine specific interactions …
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Informal debt contract and consumption : evidence from the vehicle scrappage program/
… to take up the vehicle scrappage program (VSP) in China. The presence of debt owed to family and friends (DOFF) on household balance sheet significantly reduces the takeup rate of the cash for clunkers program in China, by approximately 1.57%. Moreover, this effect is stronger among …
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Developing an alternative means of assessing speed limits on rural single carriageway roads in Ireland using observed driver behaviour.
… is proposed by deriving a Safe Profile Velocity (Vsp) and an Efficiency Index value for the road or section of road under assessment, by capturing actual driver behaviour - the hypothesis being that the derived Safe Profile Velocity (Vsp) reflects what is occurring on the road and simplifies the …
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