In vertical seismic profile (VSP) technique, the direct arrivals are recorded in addition to the reflections below current sensor depth, which makes it feasible to use the reflections to predict ahead of current depth, detailed methodology will be discussed in the paper. In this paper, we will discuss a case history where look- ...
Vertical seismic profiles (VSPs) are small‐scale seismic surveys in which geophones are lowered into a well to record waves traveling both down into the earth (direct waves from the surface source and downgoing multiples) and back toward the surface (primary reflections and upgoing multiples). VSPs thus contain information about the reflection and …
Vertical seismic profiles. A vertical seismic profile (VSP) is recorded in essentially the same way as a checkshot survey. The major difference between a VSP and a checkshot survey is that VSP data are …
Vertical seismic profiling is one of the rapidly developing areas of geophysical technology for exploring in mature basins. The measurement basically involves recording the total upgoing and downgoing seismic wave fields propagating through a stratigraphic section by means of geophones clamped to the wall of a drilled well.
"A vertical seismic profile (VSP) is a measurement in which a seismic signal generated at the surface of the earth is recorded by geophones secured at various depths to the wall of a drilled well" (Hardage, 1983, p. …
"A vertical seismic profile (VSP) is a measurement in which a seismic signal generated at the surface of the earth is recorded by geophones secured at various depths to the wall of a drilled well" (Hardage, 1983, p. 1). There are, in fact, many types of VSP, and the common bond is the borehole. We will look at the acquisition, processing ...
Vertical seismic profiles (VSPs) are commonly used as a densely sampled check-shot survey for sonic calibration and velocity information. In addition, VSP data also are traditionally used to provide the ideal seismic trace at the well for correlation with surface seismic. Using VSP data sets in this way not only undervalues the technique, but ...
In the past two decades the cost of developing an oilfield has soared from a few million to a billion or more dollars. Geophysical techniques are being increasingly called upon to aid in planning field development to prevent or at least reduce the number of mispositioned boreholes. Vertical seismic profiling (VSP) is one amongst several new geophysical …
The common active seismic sources used in VSP include those used in land and marine surface studies (see Seismic Data Acquisition and Processing) as well as the noise of the drill-bit in the case of SWD-VSP.There is a variety of geophone tools available for use in cased or uncased boreholes, which combine three orthogonal geophones, a …
Vertical seismic profiling has been a useful measurement to obtain rock properties (velocity, impedance, attenuation, anisotropy) in depth as well as to provide a seismic image of the subsurface. The VSP can also give insight into seismic wave propagation and provide processing and …
GEOL483.3GEOL882.3 VSP migration and VSP-CMP transform Travel times are mapped into depth via ray tracing; this is similar to "pre-stack" migration. This ray tracing can also transform VSP reflection records in a surface-reflection form (VSP-CMP transform) VSP apertures are limited, and so we need to know the dominant dips or use other constraints
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Vertical seismic profiles (VSPs) are commonly used as a densely sampled check-shot survey for sonic calibration and velocity information. In addition, VSP data also are traditionally used to provide the ideal seismic trace at the well for correlation with surface seismic. Using VSP data sets in this way not only undervalues the technique, but also …
Estimating seismic wavelets for deconvolution is always a challenge. Vertical seismic profile (VSP) acquisition directly delivers seismic wavelets at seismic frequencies as measured at reflector depth.
Zero-offset vertical seismic profile (VSP) data were acquired by both retrievable (wireline) geophones and distributed acoustic sensing (DAS) on cemented-in fiber-optic cable. Side-by-side comparisons of these data sets are shown at several steps in the processing flow to help understand the advantages of each of these data types.
A vertical seismic profile (VSP) survey involves placing sensors in a borehole to record the passage of energy transmitted using a source of seismic energy placed on the surface.
Vertical seismic profiling A geophysical technology for measuring the seismic properties in a profile of the earth using a set of sources and receivers, either of which is placed along the depth (vertical) axis. Introduction Vertical seismic profiling (commonly abbreviated to the name VSP) is a major technique in geophysical exploration,
Borehole Vertical seismic profiling (VSP) Basic Concept. Vertical seismic profiling (VSP) is a seismic-reflection method that records seismic arrivals from surface-activated sources with one or more receivers at depth in a borehole. Initially, VSP was primarily used to produce depth-dependent reflectivity images, which can aid in the …
Examination of vertical seismic profile (VSP) data with unsupervised machine learning technology is a rigorous way to compare the fabric of down-going, illuminating, P and S wavefields with the fabric of up-going reflections and interbed multiples created by …
The use of vertical seismic profiles in seismic investigations of the Earth. June 1982; Geophysics 47(6):906-918; ... equipment constraints restrict us to recording at only one level at .
Vertical Seismic Profiles. Introduction to Reflection Seismics. Home Courses Introduction to Reflection Seismics Subjects 6. Vertical Seismic Profiles. In this final lecture that last chapter of the reader, about the so-called Vertical Seismic Profile (VSP), is discussed. In VSP's we know both depth and time, so the velocity is much better ...
Distributed acoustic sensing (DAS) technology is a novel technology applied in vertical seismic profile (VSP) exploration, which has many advantages, such as low cost, high precision, strong tolerance to harsh acquisition environment. However, the field DAS-VSP data are often disturbed by complex background noise and coupling noise …
Vertical Seismic Profiling A geophysical technology for measuring the seismic properties in a profile of the earth using a set of sources and receivers, either of which are placed along the depth (vertical) axis. Introduction Vertical seismic profiling (commonly abbreviated to the name VSP) is a major technique in geophysical explora-
Four different methods of estimating Q from vertical seismic profile (VSP) data based on measurements of spectral ratios, pulse amplitude, pulse width, and zeroth lag autocorrelation of the attenuated impulse are described. The last procedure is referred to as the pulse‐power method. Practical problems concerning nonlinearity in the estimating …
1. n. [Geophysics] A class of borehole seismic measurements used for correlation with surface seismic data, for obtaining images of higher resolution than surface seismic images and for looking ahead of the drill bit; also called a VSP.Purely defined, VSP refers to measurements made in a vertical wellbore using geophones inside the wellbore and a …
Vertical seismic profiles (VSPs) are commonly used as a densely sampled check-shot survey for sonic calibration and velocity information. In addition, VSP data also are traditionally used to provide the ideal seismic trace at the well for correlation with surface seismic. Using VSP data sets in this way not only undervalues the technique, …
"A vertical seismic profile (VSP) is a measurement in which a seismic signal generated at the surface of the earth is recorded by geophones secured at various …
Four different methods of estimating Q from vertical seismic profile (VSP) data based on measurements of spectral ratios, pulse amplitude, pulse width, and zeroth lag autocorrelation of the attenuated impulse are described. ... uncertainties in the gain setting of the recording equipment, and the influence of structure are considered in detail ...
Introduction. Equipment and physical environment needed for VSP. Noise problems encountered in VSP. VSP field procedures. VSP data processing. Structural and stratigraphic modeling of vertical seismic profiles. Exploration applications of VSP. Production and drilling applications of VSP. References. Index.
During the past 8 years, the U.S. Geological Survey has conducted an extensive investigation on the use of vertical seismic profiles (VSP) in a variety of seismic exploration applications. Seismic sources used were surface air guns, vibrators, explosives, marine air guns, and downhole air guns. Source offsets have ranged from 100 to 7800 …
Vertical seismic profiles (VSPs) are small‐scale seismic surveys in which geophones are lowered into a well to record waves traveling both down into the earth (direct waves from …
seismic data and combines this with the VSP data. Acquisition of a simple zero-offset Vertical Seismic Profile (VSP) provides the starting place for validation of these seismic velocities, and hence input into the isotropic 2D velocity model, as well as a well tie that can be used in estimation of anisotropy from a CMP gather at the well location.
The target data are seismic velocity profiles, which naturally span a narrow range of values and have similar variability. ... (DL + MSFWI), and the ground truth profiles at 6, 10, and 12 km positions. The vertical profile at the 6 km horizontal position is in the horizontally flat part of the model. Therefore, it is estimated well by all ...
OptaSense vertical seismic profiling services provide accurate, repeat borehole seismic measurements, without the need for well intervention. ... Highly robust equipment performs insitu for 15-20 years; On-demand 4D time-lapse. Due to cost, 4D VSP acquisition at shorter intervals may not be feasible. However, the OptaSense DAS-VSP service is ...
