Q estimation from vertical seismic profile data and …
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 …
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Crosscorrelogram migration of inverse vertical seismic profile …
We present the theory of crosscorrelogram migration of ghost reflections, also known as interferometric imaging, to delineate reflector geometries from inverse vertical seismic profile data. The theory includes the equations for forward modeling, migration, asymptotic inversion, and model resolution of crosscorrelgrams. Rather than using primary …
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Surface to Borehole Procedures | US EPA
Figure 4. Comparison of real and synthetic Vertical Seismic Profiles. Survey Sources and Equipment. Selecting a source for a VSP survey is largely a function of what was used in obtaining surface seismic data. For improved matching of VSP and surface seismic data, the same sources are desirable for both surveys.
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Vertical Seismic Profiling | SpringerLink
Vertical seismic profiling (commonly abbreviated to the name VSP) is a major technique in geophysical exploration, which involves measuring downgoing and …
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Vertical seismic profiling: Separation of upgoing and downgoing
One of the essential steps in the processing of a vertical seismic profile is the separation of upgoing and downgoing signals. With this perspective in mind, seismic data recorded in a borehole are modeled in terms of these waves and a mathematically optimal "least‐squares" technique for extracting them is derived. The method imposes practically …
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Parameterization analysis and field validation of VTI …
Parameterization analysis and field validation of VTI-elastic full-waveform inversion in a walk-away vertical seismic profile configuration
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Multiscale recurrent-guided denoising network for
ABSTRACT In recent years, distributed optical fiber acoustic sensing (DAS) has emerged as a novel seismic acquisition technique. Compared with conventional hydrophones and geophones of microelectromechanical systems, DAS has an advantage in terms of acquisition geometry, such as low-cost and high-density observations. However, the …
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[Suggestion] Vertical seismic profile, now you can dig …
The graphic - the vertical seismic profile - is just a vertical column of 2x2px-colorcoded squares, 1 square per 1 block, next to a ruler (y-axis). Dark colors = solid blocks (stone, dirt), less dark colors = soft solid blocks (gravel, sand), light colors = low-speed liquids (lava), lighter colors = other liquids (water, oil), none = empty ...
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Vertical Seismic Profile (VSP)
When seeking a cost-effective contractor for your VSP project, look no further than Terrex Seismic – the Australian-owned industry leader in seismic data acquisition with a proven track record. Terrex Seismic can integrate with numerous electronic systems. This allows us to work successfully with any downhole logging contractor for quick ...
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Borehole Seismic
Find clarity in the borehole. Through seismic profiling, Halliburton borehole seismic services give operators a clearer view of their reservoir. Using geophones or distributed acoustic sensing (DAS) for vertical seismic profile (VSP) data acquisition, operators gain more data than ever to validate or improve decision making.
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Checkshots and vertical seismic profiles
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 …
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Vertical Seismic Profile (VSP LOG)
Vertical Seismic Profile (VSP LOG) Vertical Seismic Profile is applied in Dip Evaluation, determining physical properties of rocks, structure delineation, correlation with logs and existing seismic lines, images of the VSP, predicting depths to seismic reflectors, providing more accuracy velocity and Identification of seismic reflectors.
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(PDF) The use of vertical seismic profiles in …
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 ...
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Chapter 26 : Vertical Seismic Profile (VSP) | Illustrated Seismic
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.
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Vertical seismic profiles—more than just a corridor stack
Abstract. 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 ...
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Vertical seismic profiles: Now just another log?
The simple st form of vertical seismic profile (VSP) survey. involves determining the seismic travel-time between the. surface and a known depth to calibrate a velocity model. Receivers are placed ...
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Frequency-dependent reflection wave-equation traveltime
ABSTRACT To accurately image the geologic structures from walkaway vertical seismic profile (VSP) data, it is necessary to estimate the subsurface velocity field with high resolution and enhanced illumination of deep reservoirs. Because full-waveform inversion (FWI) suffers from cycle skipping when the initial model is far from the true model, we …
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Deep learning-based upgoing and downgoing wavefield …
The vertical seismic profile (VSP) considerably aids attenuation analysis and velocity calibration, enabling high-resolution seismic exploration. However, the imaging and interpretation of VSP data require pure upgoing and downgoing wavefields, and their separation is critical in processing and interpretation. Often, achieving high precision ...
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Advanced Distributed Acoustic Sensing Vertical Seismic Profile …
@article{osti_1854061, title = {Advanced Distributed Acoustic Sensing Vertical Seismic Profile Imaging of an Alaska North Slope Gas Hydrate Field}, author = {Young, Cullen and Shragge, Jeffrey and Schultz, Whitney and Haines, Seth and Oren, Can and Simmons, James and Collett, Timothy S.}, abstractNote = {Gas hydrates are found …
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Elastic full-waveform inversion of vertical seismic profile …
Distributed acoustic sensing (DAS) is a rapidly developing technology particularly useful for the acquisition of vertical seismic profile (VSP) surveys. DAS data are increasingly used for seismic imaging, but not for estimating rock properties. We have developed a workflow for estimating elastic properties of the subsurface using full …
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Seismic profiling
In VSP, a seismic sensor is lowered to a sequence of selected depths in a well by wireline. Fig. 1 shows the source-receiver geometry involved in VSP. A wall-locked seismic sensor is manipulated downhole by wireline so that the receiver occupies a succession of closely spaced vertical stations. …
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Vinci Technologies | GEOREC-S
GEOREC-S - Vertical Seismic Profile tool. Print. Contact us. Click to download the datasheet GEOREC-S.pdf. Description. VSP (Vertical Seismic Profile) is the main link …
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6. Vertical Seismic Profiles
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 known that from surface seismics. 6. Vertical Seismic Profiles. 6.
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Vertical Seismic Profiling | SpringerLink
Introduction. Vertical seismic profiling (commonly abbreviated to the name VSP) is a major technique in geophysical exploration, which involves measuring downgoing and upgoing seismic wavefields through a stratigraphic sequence. Shortly after the first attempts of developing surface reflection seismology, where both sources and receivers …
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A guide to current uses of vertical seismic profiles
Tools. 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 ...
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A new joint reverse time migration method to improve vertical seismic …
The vertical seismic profile (VSP) survey was developed for efficient imaging of small structures, reservoir monitoring, and precisely describing reservoirs and hydrocarbon deposits (Smidt et al., 1998; Klokov and Hardage, 2017; Liu et al., 2018; Takougang et al., 2019). The seismic sources are placed at the Earth's surface, …
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A guide to current uses of vertical seismic profiles
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 …
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(PDF) VSP: An In-Depth Seismic Understanding
Vertical seismic profiles combine active seismic sources on the surface with seismic receivers lowered in a borehole, within the reservoir (Hardage, 2000). ... coal users, and coal equipment ...
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Optical Vertical Seismic Profile on Wireline Cable | SLB
Vertical seismic profiles (VSPs) are routinely acquired by deploying downhole seismic sensors in a borehole with wireline logging cable and then triggering …
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The use of vertical seismic profiles in seismic
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 …
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