Facies differentiation of the malm by interpretation of. Processing and interpretation of threecomponent vertical seismic profile data, ross sea, antartica by meltem akan a thesis submitted in partial fulfillment of the requirements for the degree of master of science in geoscience. A vertical seismic profile vsp is recorded in essentially the same way as a checkshot survey. First, the vsp data have a signal bandwidth closer to the seismic data than the sonic logs. Vertical seismic profiles have been run in a large number of wells and in a variety of geological provinces with the object of assisting the seismic data processor and improving the geological interpretation. In vsps we know both depth and time, so the velocity is much better known that from surface seismics.
The last step is the processing and interpretation of the results. Geophone azimuth consistency from calibrated vertical. Vertical seismic profiling commonly abbreviated to the name vsp is a major technique in geophysical exploration. Vertical seismic pro les in this chapter the socalled vertical seismic pro le vsp is discussed. Solid lines show positions of drill holes 994d, 995b, and 997b. The complete package halliburton uses the latest technology in data acquisition coupled with advanced. In this final lecture that last chapter of the reader, about the socalled vertical seismic profile vsp, is discussed.
Determinationof multiplesin surface seismic data using. Pdf the use of vertical seismic profiles in seismic. Multioffset vertical seismic profiles vsps from the kola superdeep borehole sg3, as part of a larger seismic study of the kola region conducted during the spring of 1992, sample the dipping. In particular, a novel method of obtaining a vertical seismic profile of the earths subterranean formation surrounding a well borehole with a horizontally direct swept frequency vibrator and a multicomponent sonde is provided. Vertical seismic profile vsp is a technique of seismic measurements used for high resolution seismic imaging. Facies differentiation of the malm by interpretation of reflection seismic profiles and a. Geophone azimuth consistency from calibrated vertical seismic profile data peter gagliardi and don c. Timelapse seismic is an established technology for monitoring hydrocarbon production and co 2 sequestration. Cervenys formulation of the drt is applied to the computation of vertical seismic profile vsp synthetics. Vertical seismic profiling vsp and horizontal seismic profiling hsp surveys were conducted during.
Processing and interpretation of threecomponent vertical. The vertical seismic profile vsp is a technique based on the register of acoustic travel time recording the duration of the passage of a signal from the source through the earth and back to the receiver. The target depth for these seismic profiles is 100. Presents the vertical seismic profile data area by area for the seismic stratigraphic investigation of. Vertical seismic profiling open energy information. Pdf vertical seismic profile results from the kola. Plans are to use longer reflection seismic profiles 3. Vertical seismic profiling with distributed acoustic sensing heather k. Historically, the main benefit derived from these surveys, also known as vertical seismic profiles vsps, has been to link timebased surface seismic images with depthbased well logs. A new system for efficiently acquiring vertical seismic. Vertical seismic profiling using a fibreoptic cable as a. Vertical seismic profiling data often provide more reliable correlation of well control to seismic data than synthetic seismograms derived from sonic logs. Vertical seismic profiling with distributed acoustic sensing. Geological survey has conducted an extensive investigation on the use of vertical seismic profiles vsp in a variety of seismic exploration applications.
A vertical seismic profile vsp stanford university. With the radexpro software, you can efficiently process zerooffset, faroffset and walkaway 2d vsp data. Onshore seismic monitoring is mostly conducted using surface 3d seismic surveys, which are sometimes complemented with offsetwalkaway3d vertical seismic pro. Lopez, yingping li, bastian blonk, ben hewett, and albena mateeva. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. A vertical seismic profile vsp was made, using a vibroseis source, in a well in austria owned by oem vag. Principles, third edition handbook of geophysical exploration. Introduction by 12 acquisition units slimvsp inside next hole, slimvsp describes the geometry and spatial distribution of fracture growth during fracturing.
Pdf a guide to current uses of vertical seismic profiles. The defining characteristic of a vsp of which there are many types is that either the energy source, or the detectors or sometimes both are in a borehole. Noisy seismic travel time data units of s from equallyspaced every 20 m seismometers deployed in a m deep vertical seismic profile experiment the. Vertical seismic profile vsp data were acquired in october 2000 in the 1700 m deep klx02 borehole, near laxemar in southeastern sweden. The board, in consultation with the operator, may request the operator to acquire a vertical seismic profile vsp, where it would. A case study di yang1, alison malcolm 2, michael fehler, and lianjie huang3. If you continue browsing the site, you agree to the use of cookies on this website. The major difference between a vsp and a checkshot survey is that vsp data are recorded at much smaller spatial sampling intervals than checkshots. Geophones in the borehole record reflected seismic energy from a seismic source at the surface. The drt equations are supplemented with formulae for the transformation of drt across a smoothly curved interface between two inhomogeneous anisotropic media. Halliburton borehole seismic services bhs can help enhance reservoir characterization with customized, reliable, highresolution images provided by faroffset, walkaway and 3d vertical seismic profiles vsp. The present invention generally relates to a method of seismic exploration. Next, it is explained how to obtain a re ectivity pro le from raw vsp data.
Dualwell 3d vertical seismic profile enabled by distributed acoustic sensing in deepwater gulf of mexico han wu, waifan wong, zhaohui yang, peter b. Us4706224a method of vertical seismic profiling and. Routine wellbased measurements such as rock cuttings and electric logs record local information, often just centimeters from the well. A type of vertical seismic profile in which the source is moved to progressively farther offset at the surface and receivers are held in a fixed location, effectively providing a mini 2d seismic line that can be of higher resolution than surface seismic data and provides more continuous coverage than an offset vsp. The special properties of the vertical seismic profile, which allows the separation of the upward and downward travelling components of the recorded waveform, provides a means of studying the acoustic response of the earth in detail.
A vsp is some collection of seismograms recorded from the surface to a borehole. Pdf acquisition, processing, and interpretation of vertical. A vertical seismic profile vsp and a moving source vsp. Checkshots and vertical seismic profiles aapg wiki. Methane hydrate and free gas on the blake ridge from vertical. But in vertical seismic profiles vsp, the receivers are run vertically in a wellbore by activating a seismic energy source on or near the earths surface. Pdf describes the uses of vsps in seismic exploration that have been published in the last 3 years. The results of this study suggest that, by adopting the inside coiled tubing method without drilling a new observation well, more affordable distributed acoustic sensing vertical seismic profile monitoring can be achieved in fields such as co 2 capture and storage and unconventional shale projects, where monitoring costs have to be minimized. Method of monitoring quality of seismic data processing and method of processing vertical seismic profile data. This ray tracing can also transform vsp reflection records in a surfacereflection form vspcmp transform vsp apertures are limited, and so we need to know the dominant dips or use other constraints. Malcolm and michael fehler and lianjie huang, year2014. Normal moveout corrections, based on the velocity model from the zero offset vsp, were applied during processing of the offset seismic profiles.
Timea lapse full waveform inversion of vertical seismic. The main goal of the active seismic methods is to locate fracture zones in the crystalline bedrock. Thakur, ngri summary australia is the region to have large geothermal resources with the potential to provide cost effective lowemission energy for longer term. 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.
From presurvey plan design to data acquisition, processing and interpretation, our fully. Vertical seismic profile data can be used to assess. The vertical seismic profile vsp in az03 injection well. Case history timelapse walkaway vertical seismic profile monitoring for co2 injection at the sacroc enhanced oil recovery field. Maybe i did some basic mistake, but if anybody else might have the same prob. Our algorithm consists of one long 300 generations and a series of short 50 generations ga runs. Timelapse walkaway vertical seismic profile monitoring for. May 25, 2014 vertical seismic profiling vsp is a measurement where the seismic source is still at the surface but the receivers are lowered down into a borehole slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Pdf acquisition, processing, and interpretation of. The complete package halliburton uses the latest technology in data acquisition coupled with advanced vsp software to provide quality images of the borehole and its vicinity. Due to its geometry, a vsp survey is used principally to calibrate surface seismic data by giving an accurate depthtime measurement to geological features. Vertical seismic profiling vsp is a measurement where the seismic source is still at the surface but the receivers are lowered down into a. Vertical seismic profiling vsp and downhole logging carried out on ocean drilling program leg 156 provide ties to the regional threedimensional seismic. Pdf borehole seismic data processing and interpretation.
Seven offset source seismic profiles were also made, using a vibroseis source. In addition, vertical seismic profile data can be used to assess parameters in areas such as deconvolution and signal band width for the evaluation of conventional seismic data. In this chapter the socalled vertical seismic profile vsp is discussed. The final memory processing successfully delivered an updated seismic model. Just wanted to mention, that had some depthuncertainties writing a new segy. Presents the vertical seismic profile data area by area for the seismicstratigraphic investigation of. A case study from the co2crc otway project julia correa, roman pevzner, andrej bona, konstantin tertyshnikov, barry freifeld, michelle robertson, and thomas daley.
Vertical and horizontal seismic profiling investigations at. The downgoing and upgoing seismic wavefields are recorded with receivers positioned at closely spaced depths in a well to obtain detailed seismic. Singlechannel seismic data on blake ridge 14, depthconverted using velocitydepth functions right panel determined from traveltime inversion of vertical seismic profile data. Abstract a geothermal power plant projected in unterhaching, south. In geophysics, vertical seismic profile vsp is a technique of seismic measurements used for correlation with surface seismic data. Pdf reverse time migration of 3d vertical seismic profile. A vertical seismic profile vsp seismologists always welcome the additional information from a vertical seismic profile vsp.
Hi, at first thanks a lot for this really nice tool box. Vertical seismic profiling and integration with reflection. Vertical seismic profile vsp surveying is a vital tool in subsurface imaging and reservoir characterization. Vertical seismic profile inversion with genetic algorithms. Hall abstract a multicomponent walkaway vsp data processed for pp and ps imaging as well to study the avo response. Optical vertical seismic profile on wireline cable schlumberger. The university of texas at austin, bureau of economic geology, report of investigations no. A vertical seismic profile vsp is a measurement in which the seismic waves are recorded by geophones secured in a borehole for a seismic source at the surface of the earth. Lawton abstract raw borehole geophone data, taken from a 3line walkaway vertical seismic profile vsp acquired in the pembina oil field in alberta, was examined for orientation azimuth consistency. Realtime wavelet processing improved the accuracy of the bit on seismic while drilling ahead. High fidelity vibratory source seismic method for use in vertical seismic profile data gathering with a plurality of vibratory seismic energy sources gb2307554b en 19951127. Interpretation of azimuthal vertical seismic profile vsp data at the multiwell experimental site, gar field county, colorado by myung w. Data obtained from a vertical seismic profiling survey will provide different geophone depths is used to calculate a detailed seismic velocity profile of the subsurface in the immediate vicinity of the test borehole. 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.
We describe a new geneticalgorithm ga inversion technique and apply it to a vertical seismic profile vsp inversion problem where the goal is to recover slowness and impedance profiles. Analysis of multicomponent walkaway vertical seismic profile data bona wu, don c. While a receiver may be moved a vertical distance of 200. Lee abstract azimuthal vertical seismic profile vsp data lee and miller, 1985 were analyzed and interpreted in order to delineate the lateral extent of the lower. For these reasons, we collected vertical seismic profiles vsps, which can provide a better tie between the seismic data and the loggingcork data, because vsps are collected in terms of depth downhole and traveltime. Svp extraction and imaging for faroffset vertical seismic profile data. A vertical seismic profile vsp survey involves placing sensors in a borehole to record the passage of energy transmitted us. Optical vertical seismic profile on wireline cable abstract vertical seismic profiles vsps are routinely acquired by deploying downhole seismic sensors in a borehole with wireline logging cable and then triggering a seismic source. Both systems are specified in cartesian coordinates.
Analysis of multicomponent walkaway vertical seismic profile data. Vertical seismic profiling vsp is a borehole geophysical method. If the address matches an existing account you will receive an email with instructions to reset your password. It can also be used for correlation with surface seismic data providing velocity information and information for processing such as deconvolution parameters. Vertical seismic profiling and integration with reflection seismic.
Interpretation of azimuthal vertical seismic profile survey. To date, a pp wave corridor stack and vspcdp mapping have been completed and are correlated to synthetic seismograms. Vertical seismic profile vsp inversion for geothermal. Vertical seismic profile an overview sciencedirect topics. Acquisition, processing, and interpretation of vertical seismic profiles. Case history seismictrak service identified target ahead. The objectives of the vsp were to image reflectors in the borehole for correlation with surface seismic and borehole data, study the signal penetration of explosive versus mechanical sources. Borehole seismic surveys are now among the most versatile of all downhole measurement techniques used in the oil field. The objective of this survey was to model the extent of the co. Vertical seismic profile highresolution images, avo calibration, anisotropy estimation and fracture detection walkaway vsp hal38783 shearwave splitting hal121414 arbitrary polarization incident swave delay time slow wave fractures fast wave fractures fracture strike fracture normal.
Dedicated module for vsp survey geometry calculation and assignment, properly accounting for borehole deviations. Analysis of multicomponent walkaway vertical seismic. Vertical seismic profiling vsp is a measurement where the seismic source is still at the surface but the receivers are lowered down into a borehole slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Vertical seismic profile synthetics by dynamic ray tracing in. The technique allows geophysicists to infer critical information that cannot be. Also, a vsp uses the reflected energy contained in the. The vsp can also give insight into seismic wave propagation and provide processing and interpretive assistance in the analysis of surface seismic data. The sensors are usually contained within sondes that are coupled to the bore.
Vertical seismic profile vsp inversion for geothermal reservoirs sanjeev rajput, csiro p. Reverse time migration rtm has shown increasing advantages in handling seismic images of complex subsurface media, but it has not been used widely in 3d seismic data due to the large storage and computation requirements. Vertical seismic profiling commonly abbreviated to the name vsp is a major technique in geophysical explora tion, which involves measuring downgoing and. Noisy seismic travel time data units of s from equallyspaced every 20 m seismometers deployed in a m deep vertical seismic profile experiment the same geometry as in example 4. A field experiment of walkaway distributed acoustic sensing. Slimvsp is the perfect choice for digital multilevel array seismic surveys in the mining borehole.
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