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Proceedings of the IEEE

Issue 10 • Date Oct. 1984

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Displaying Results 1 - 25 of 26
  • [Front cover and table of contents]

    Publication Year: 1984, Page(s): c1
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  • Scanning the issue

    Publication Year: 1984, Page(s):1235 - 1237
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  • The common depth point stack

    Publication Year: 1984, Page(s):1238 - 1254
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4593 KB)

    The Common Depth Point (CDP) Method is a seismic data acquisition and processing technique which transforms field recordings from seismic surveys into pseudo-cross-sectional images of the earth's geologic layering beneath the survey line. Such images are the primary geophysical analysis tools used by explorationists to pinpoint likely drilling locations for oil and gas reservoirs. The CDP Method h... View full abstract»

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  • Seismic interpretation

    Publication Year: 1984, Page(s):1255 - 1265
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1308 KB)

    In seismic exploration, an acoustic energy source radiates elastic waves into the earth from the surface; receivers on the surface detect acoustic energy reflected from geological interfaces within the earth. The recorded data are processed in ways which ease interpretation. Seismic interpretation is the interface between the exact mathematics of seismic data processing and inexact geological reas... View full abstract»

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  • Seismic data gathering

    Publication Year: 1984, Page(s):1266 - 1275
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1238 KB)

    We present a brief review of those aspects of seismic data gathering which have a bearing on seismic data processing and interpretation. A summary of sources, detectors, and other instruments is given. Noises that interfere with seismic reflection data are described. The most troublesome noises are source-generated coherent noises and much of the data gathering effort is directed towards attenuati... View full abstract»

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  • Statistical pulse compression

    Publication Year: 1984, Page(s):1276 - 1289
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1305 KB)

    The seismic method in petroleum exploration is an echo-location technique to detect interfaces between the subsurface sedimentary layers of the earth. The received seismic reflection record (field trace), in general, may be modeled as a linear time-varying (LTV) system. However, in order to make the problem tractable, we do not deal with the entire field trace as a single unit, but instead subdivi... View full abstract»

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  • Vibrator signals

    Publication Year: 1984, Page(s):1290 - 1301
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3085 KB)

    The seismic reflection method accounts for over 90 percent of the geophysical expenditures for oil and gas exploration. Controlled sources of seismic energy emit signals into the earth which are reflected to the earth's surface by density-velocity contrasts associated with variations in subsurface rock lithology, stratigraphy, and structure. The reflected signals detected on the earth's surface ar... View full abstract»

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  • Migration of seismic data

    Publication Year: 1984, Page(s):1302 - 1315
    Cited by:  Papers (38)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2863 KB)

    Reflection seismology seeks to determine the structure of the earth from seismic records obtained at the surface. The processing of these data by digital computers is aimed at rendering them more comprehensible geologically. Seismic migration is one of these processes. Its purpose is to "migrate" the recorded events to their correct spatial positions by backward projection or depropagation based o... View full abstract»

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  • Refraction statics

    Publication Year: 1984, Page(s):1316 - 1329
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5054 KB)

    The determination of statics corrections is one of the fundamental problems in seismic data processing. Statics errors lead to loss of resolution and less than optimum interpretation of the seismic data set. The arrival times of refraction events form a data set sufficient to unravel the structure of the near-surface layers of the earth leading to accurate static corrections and enhanced interpret... View full abstract»

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  • Seismic velocity estimation

    Publication Year: 1984, Page(s):1330 - 1339
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1831 KB)

    The estimate of propagation velocities in the reflection or refraction seismic method is essential to the effective imaging of the subsurface. Wave propagation in a fully elastic medium gives rise to several propagation modes, among them are the longitudinal and transverse compressional waves (P-waves and S-waves), which are commonly used in the reflection and refraction seismic methods. With appr... View full abstract»

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  • Signal and noise estimation from seismic reflection data using spectral coherence methods

    Publication Year: 1984, Page(s):1340 - 1356
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4549 KB)

    Spectral coherence analysis is unrivaled as a quantitative tool over a range of practical problems in seismic interpretation, data processing, quality assessment for data acquisition, and research. Its great virtue is its ability to supply the detailed error information necessary for a thorough interpretation of results. Ordinary coherence analysis is employed in line intersection analysis and the... View full abstract»

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  • Multidimensional filtering of seismic data

    Publication Year: 1984, Page(s):1357 - 1369
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5208 KB)

    Multidimensional filtering has been applied during recording and processing of seismic reflection data since the earliest days of analog recording on paper records. As the state of the art has evolved to digital recording and processing, and acquisition has expanded to include dense spatial sampling over a large number of channels, more sophisticated multichannel filters have been developed. These... View full abstract»

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  • Multiple reflections as an additive noise limitation in seismic reflection work

    Publication Year: 1984, Page(s):1370 - 1384
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3269 KB)

    A principal problem in seismic exploration is the heterogeneous partially reflecting medium that makes up the transmission zone to the target reflectors of interest. Multiple reflection between the free surface and the shallower reflectors produces additive noise that interferes with our view of the bedding plane geometry and rock properties in the target zone. Residual multiple energy on the inte... View full abstract»

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  • Seismic modeling and inversion

    Publication Year: 1984, Page(s):1385 - 1393
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (978 KB)

    The seismic method of petroleum exploration has always been an inverse technique. The explorationist has used data from seismic and other sources to derive an indirect description of a potential reservoir. Key to his success has been the use of forward-modeling methods to aid him in relating what he sees in the seismic data to what he expects to see, based on his hypothesized geologic model These ... View full abstract»

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  • Wavelet estimation

    Publication Year: 1984, Page(s):1394 - 1402
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2634 KB)

    An important problem in seismic exploration is the estimation of and correction for the seismic wavelet. A seismic signal may be modeled as a convolutional model with the wavelet as one component. The wavelet propagated by the seismic energy source is complicated by transmission and recording filters. Some filters in the system can be deterministically defined while others are more conjectural. Th... View full abstract»

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  • Phase estimation using the bispectrum

    Publication Year: 1984, Page(s):1403 - 1411
    Cited by:  Papers (110)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (633 KB)

    The information which is of importance in the reflection seismic method resides in the reflectivity series. In order to extract this information about the subsurface, the blurring effect of the seismic wavelet must first be removed. Since this signature is generally unknown, various wavelet estimation schemes have been developed. The one most currently used in the seismic industry is based on the ... View full abstract»

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  • Resonant characteristics and end effects of a slot resonator in unilateral fin line

    Publication Year: 1984, Page(s):1416 - 1418
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    The resonant characteristics and end effects of a rectangular-slot resonator in unilateral fin line are presented for centered as well as off-centered fin locations in the guide. Sample theoretical results on the resonant frequency are verified through experiment at the Ka-band. View full abstract»

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  • Surface-acoustic-wave (SAW) voltage sensor with improved sensitivity

    Publication Year: 1984, Page(s):1418 - 1419
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    The sensitivity of a surface-acoustic-wave (SAW) voltage sensor can be increased by reducing the thickness of the substrate across which the voltage is applied. Voltage sensitivity of 95 Hz/V has been obtained in a 77-MHz SAW oscillator fabricated on a 71-µm-thick, 728° Y-X LiNbO3substrate. View full abstract»

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  • Number of simultaneous colors versus gray levels: A quantitative relationship

    Publication Year: 1984, Page(s):1419 - 1421
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (274 KB)

    Growing interest in color graphics and image processing stresses the need for a quantitative basis for requirements. A result obtained via fuzzy entropy measure for gray-tone images is extended to color. A heuristically derived relationship between the number of simultaneous colors versus number of gray levels for comparable information is presented. View full abstract»

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  • The DP professional's guide to writing effective technical communication

    Publication Year: 1984, Page(s):1422 - 1423
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  • How to write computer manuals for users

    Publication Year: 1984, Page(s):1422 - 1423
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  • Documentation development methodology

    Publication Year: 1984, Page(s):1422 - 1423
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  • Writing handbook for computer professionals

    Publication Year: 1984, Page(s):1422 - 1423
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  • Feedback

    Publication Year: 1984, Page(s): 1423
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  • Book alert

    Publication Year: 1984, Page(s): 1423
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H. Joel Trussell
North Carolina State University