There were challenging logistics in planting and cabling them, and in their recording with three times the normal number of channels. Processing of converted wave seismic data involves a number of steps that are substantially different from, and significantly more challenging than, conventional p wave processing. With waves you can view seismic data files recorded in. Seisspace promax software makes it easy to remove noise in both new and old surveys. Our geoscience team uses advanced techniques to create high resolution seismic images and reservoir attributes. Dxpro, is a proprietary divestco processing system that continues to be improved with new advances in technology. Converted waves are a useful tool for characterizing the elastic properties of a reservoir for a number of reasons. The continued interest in converted p to s waves ps waves and vertical seismic profiles vsps has resulted in the steady development of. For p wave seismology it is common to approximate wave propagation using. Rockmc also provides additional tools for wavelet estimation so that a proper ps reflection series is derived from the well log data for ps wavelet estimation. In particular, converted wave processing involves specialised approaches to s wave receiver statics, ps normal moveout nmo correction and common conversionpoint.
However, the acquisition system in the shallowwater arabian gulf with the hard seafloor gives rise to dispersive surface waves, which contaminate reflection signals severely. Ocean bottom seismic processing cable survey schlumberger. Our tool orientation, wave mode separation and imaging routines are modeldriven in 3d. Signal enhancement and converted wave processing of 4c obc. The list is split into broad categories, depending on the intended use of the software and its scope of functions. Schlumberger vista 2017 ista seismic data processing software is a windowsbased application that can be used during the early stages of acquisition qc to complete processing of 2d and 3d seismic data acquired on land, in marine applications, offshore, or through vsp. Notice that free and opensource requires that the source code is available. The spw software is an interactive seismic processing system. Searched for seismic in all fields 451 results found variables and numbers. In addition, it permits us to include regularization constraints that reduce sampling and illumination artifacts. Generalized processing land 3c2d seismic data processing analysis of crucial issues g. Saexploration specializes in wavefield modeling and waveequation depth imaging.
Downloads are available as either unix gzipped tar files or windows zip files. For this, we use our own vsprowessx 3d ray tracing system. Text files containing the observers logs, navigation files or topographic survey are input to the geometry application. Alt provides state of the art seismic data processing which is supported by paradigm software geodepth and focus experience. Nov 30, 2015 interestingly, the reservoir seismic response to the converted wave is found consistent with well logs information. Ocean bottom seismic data applications for resolving seismic and geological. Subsurface seismic data processing and imaging pgs.
This short course discusses the growing importance of threecomponent 3c seismic technology that combines shear waves with compressional waves in the acquisition, processing, and interpretation of surface seismic and borehole data. Earthworm is the most widely used seismic data acquisition and automatic earthquake processing software for regional seismic networks. Bgps major advanced seismic data processing techniques include. Saexplorations highly experienced data processing teams mitigate risk and reduce cost by providing superior quality seismic data processing and imaging solutions. This software is called the crewes matlab software library cmsl and accompanies the textbook numerical methods of exploration seismology. Processing can be hazardous if artifacts overpower the intended action of the program.
Unlike pwaves, converted shear waves are largely unaffected by fluids. The anomaly is not found on the converted wave section. S waves are generated by most land seismic sources, but not by air guns. Pdsview software package for viewing oilfield graphics data files. Our depth processing and imaging services provide extensive modules and applications for deconvolution, waveequation migration, model building, demultiple and postmigration processes.
The system delivers a complete set of data to depth imaging and processing experts, as well as to interpretation specialists, enabling them to achieve accurate subsurface velocity models, structural attributes, medium properties, and reservoir characteristics. This facilitates interpretation of shallow highresolution events, gives enhanced subgas and mud channel definition, and helps resolve amplitude anomalies with weak acoustic. Prestack migration is a critical step in the processing of converted waves. Pgs offers a range of signal processing and imaging solutions, through its global imaging centers. Continuously growing number of c wave surveys performed in poland proves that technique brings useful information complementing p wave images. These are fullfeatured reflection seismology processing packages, with support for modeling, imaging, and inversion.
Cn102053262b method for acquiring azimuth velocity of. Attatched figure gives an example of s wave polarization planes, which can be mapped from c wave seismic data. Pdf processing seismic data with open source software. Seismic processing, free seismic processing software downloads. In total, the course contains more than one thousand illustrations, many representing the underlying.
They are relatively lowlevel and in some cases have their own data formats and involve learning an extensive syntax or metalanguage. Convertedwave seismology for coal exploration cseg recorder. Acquisition, processing, and interpretation of pp and ps 3 4 seismic. Depth imaging more than psdm proccessing and software. Use the latest seismic processing software to prepare the data for interpretation. Radexpro is a seismic processing software on windows. A seismic wave that changes from a p wave to an s wave.
During seismic exploration, pwaves also known as primary or compressive waves penetrate down into the earth. Stepbystep analysis of the converted wave processing flowchart explains an impact of solutions adopted at particular processing stages, specific to cwave seismic data, on final image. Dug insight takes a fresh approach to seismic interpretation software, with powerful features integrated into an easytouse interface. There are many examples of good processing using mediocre software. For borehole seismic which has been acquired by conventional three component wireline tools, we always carry out the processing in three components in order to gain as full an understanding of the complex wave.
Free earthquake analysis software seismology research centre. The thesis objective is to build a theoretical foundation for joint avo inversion of pp and pswaves in anisotropic media. Methods 59 after nmo, it is important to understand the f resnel zone or the averaging aperture in a stacked section and the po. The comparison of pp and ps reflectivities can help us identify fluid contacts, and swave ray paths provide a tool to illuminate targets hidden beneath gas filled zones. It contains 16 standalone applications handling the full range of seismic exploration methods from reflection, refraction, and surface wave to borehole seismic. Diffraction imaging, 6d interpolation and 3c ps processing have been developed inhouse within the research team. This is a list of free and opensource software for geophysical data processing and interpretation. Contact sales vista desktop seismic data processing software provides data processing from earlystage acquisition qc to final processing and interpretation of 2d and 3d seismic data acquired on land or offshore or as a vertical seismic profile vsp, in all industry and manufacturer data formats. Dug insight seismic interpretation software downunder. The overall objective of this course is to introduce entry level andor junior geophysicists and geoscientists to the essential acquisition and technical processing concepts and principles that form the basis for value added seismic applications in exploration, field appraisal, and reservoir management. The obtained results increased the reliability of seismic interpretation within. Waves is the result of over 15 years of development and refinement of our seismogram viewer, which we believe is by far the easiest to use earthquake waveform analysis software package available today. Due to these properties of s wave, the converted wave data can provide.
Seismic data processing involves the compilation, organization, and conversion of wave signals into a visual map of the areas below the surface of the earth. Least squares migration of converted wave seismic data cseg. Numerous examples and case histories show the design, application, and use of. Avo analysis is a technique by which geophysicists attempt to determine thickness, porosity, density, velocity, lithology and fluid content of rocks. If not identified as coherent seismic artifacts, these events can be very confusing during the interpretation process. From project planning to data delivery, our integrated approach utilizes stateoftheart technologies and innovative workflows. P waves that impinge on an interface at nonnormal incidence can produce s waves, which in that case are known as converted waves. Structural imaging for complex geological bodies resolution improvement processing 3d merging reprocessing obc processing 3c3d vsp processing wide azimuth processing converted wave data processing. Alt is able to process complex structure by using the latest processing technology and has experienced in processing for all indonesian data and some regional data east africa, middle east and south east asia. Alex falkovskiy geophysical consultant rocky mountain. Discover industryleading workflows for convertedwave velocity model.
Seismic processing software free download seismic processing. Seismic data results the first item of note is the remarkable data quality of modern ps converted wave seismic acquisition and processing figure 5. Variation in seismic reflection amplitude with change in distance between shotpoint and receiver that indicates differences in lithology and fluid content in rocks above and below the reflector. Ray tracing and processing are incorporated within a single software package in order to allow full interaction between the various modules. Seismic processing and imaging gain deeper insight with the industrys most accurate subsurface imaging tools. Spw can be configured for standalone use on workstations, desktop pcs or laptops and may also be installed as a clientserver confi. Prism is opensource software used for automatically processing strongmotion records, and is intended to be used by individuals or strongmotion networks. Vista desktop seismic data processing software provides data processing from earlystage acquisition qc to final processing and interpretation of 2d and 3d seismic data acquired on land or offshore or as a vertical seismic profile vsp, in all industry and manufacturer data formats. At one time, seismic processing required sending information to a distant computer lab.
Multicomponent seismic technology is extremely effective in reducing the risks involved in reservoir development, routinely extending the use of seismic data into the reservoir domain. Comprehensive seismic processing and qc software for data acquired on land, offshore, or vertical seismic profile. Ixseg2segy is a 32bit windows program designed to read seg1, seg2, segy, ascii, csv and other instrument manufacturers multichannel seismic data formats, view, process and interpret the data using simple techniques and output the data as seg2, segy or. The continued interest in converted p to swaves pswaves and vertical seismic profiles vsps has resulted in the steady development of advanced vector wavefield techniques. Pgc product parallel geoscience corporation was started in 1988 with the purpose of writting easy to use seismic processing software.
In the second example from offshore brazil, a flat spot associated with fluid contact is clearly visible on the p wave image. Our oceanbottom seismic processing technology consists of a comprehensive array of algorithms and workflows that maximize the value of your multicomponent datawhether traditional 2cpz data from an ocean bottom cable or ps data from modeconverted shear waves. The figures in this article were generated using the open source software madagascar. Should multicomponent seismic data be recorded, after processing both pp and ps seismic data can be used for a joint impedance inversion.
Processing of convertedwave seismic data involves a number of steps that are substantially different from, and significantly more challenging than, conventional pwave processing. The invention provides a method for acquiring the azimuth velocity of a seismic psv converted wave and a method for processing the data of the seismic converted wave according to the acquired azimuth velocity. Stk seismic tool kit is a tool for seismic signal processing in graphical interface stk seismic tool kit is a tool for seismic signal processing in graphical interface. Least squares migration utilizing oneway wave equation migration. Multicomponent interpretation and event registration. These results allow for the use of avo on these data. Here are the guidelines for geophysical software and algorithms papers. The technique requires plotting points and eliminating interference. One of the key stages in processing multicomponent seismic data is to combine the results and interpretations from both the conventional and shear or converted wave. Earthstudy 360 uses the complete recorded wavefield to provide a highly accurate and detailed description of the subsurface. However, this course uses cartoons and real data examples to provide an intuitive understanding of the seismic processing procedures, resorting to an algebrabased argument on rare occasions. Convertedwave survey design was not well understood and design software not commercially available. Tutorial on seismic reflection cdp data processing in the.
Finally, multilinear regression analysis andor a neural network approach can be carried out using some of the generated seismic attributes for determination of density. Our seismic interpretation software, dug insight is a fullfeatured 2d3dprestack visualisation and. This course provides a thorough overview of the methods of multicomponent 3c and 4c seismic exploration from basic petrophysical analysis and survey design through 3d converted wave migration. Divestco provides inhouse innovative research and development including alignment h1 3c orientation h1orient, ps 3c vector scaling, 3c vector deconvolution, and ps 3c migration algorithms. Land 3c2d seismic data processing analysis of crucial issues.
In this thesis, a processing workflow is designed for the 4c obc seismic data to obtain pp wave, converted pps and pss wave imaging in fourcomponent data. Multicomponent technology can be applied in both reservoir development and exploration environments to help resolve many seismic and geological challenges. Acquistion steps of a 3d numerical model for sierra ratyracing software 55. Ixseg2segy seismic record viewing processing utility format conversion, first break picking segy viewer, seg2 viewer shareware. These include complex wave phenomena, targetoriented seismic acquisitions, and extended velocity model descriptions that incorporate anisotropy and converted waves. Least squares migration permits the estimation of subsurface models that honor the recorded primary seismic wavefield. The method for acquiring the azimuth velocity of the seismic psv converted wave comprises the following steps. Software to download usgs earthquake hazard program.
Obn seismic services from the field to the processing office, trust saexploration to manage your data with maximum efficiency and unrivaled imaging excellence. Contact sales vista desktop seismic data processing software provides data processing from earlystage acquisition qc to final processing and interpretation of 2d and 3d seismic data acquired on land or offshore or as a vertical seismic profile vsp, in all industry and. Saex is an internationallyfocused oilfield services company offering a full range of verticallyintegrated seismic data acquisition and logistical support services in remote and complex environments throughout alaska, canada, south america, southeast asia and africa. Kh10030mf seismic processing software globe claritas uses an interactive graphical application to coordinate 2d or 3d seismic survey geometry information.
Standard timedomain convertedwave processing of the horizontal components of these lines, including provision for. Converted waves and vector wavefield applications 2016 disc james e. Tutorial on seismic reflection cdp data processing in the radexpro plus software edition of 21. Free seismic analysis software august 18, 2017 september 1, 2018 our seismologists have designed some of the best, easiest to use earthquake data analysis software, which are mostly free to use to make processing of your data and learning about earthquakes a much more enjoyable experience. Dramatic improvements in recording hardware and in data processing have brought multicomponent seismic from the domain of the research lab and academia to more widescale use by explorationists and development geoscientists. Other p wave to s wave ps conversions can occur, but the downup conversion is the primary focus. Passcal provides opensource software for downloading seismic data from ref tek rt72a, rt and rt125, and quanterra q330 recorders, for quality assessment, and for conversion to other data formats for analysis and archiving at the iris data management center. In this study, by considering their characteristics in linearity, surface waves can be separated from reflection signals. The best known example of such kind is seismic unix, a free reflection processing system developed at the colorado school of mines. In the past, ps seismic data has been so noisy that the only information derivable from it was structural components from the stack.
With waves you can view seismic data files recorded in miniseed, pcsuds, and other file formats. It is well suited for indepth hruhr marine seismic processing, realtime marine 2d3d seismic qc, onboard fast track processing, land and marine offline seismic qc, complete processing of nearsurface seismic data reflection, refraction, tomography, masw and vsp processing. These shear waves are then known as converted shear waves. Least squares migration of converted wave seismic data. S waves, or shear waves, travel more slowly than p waves and cannot travel through fluids. In particular, convertedwave processing involves specialised approaches to swave receiver statics, ps normal moveout nmo correction and common conversionpoint ccp binning. With new processing and parallelization techniques and a suite of interactive full wave 3d noise suppression tools, eliminate noise nondestructively to deliver precision data.
Deco geophysical, ooo moscow state university science park, leninskiye gory 177, 119992 moscow, russia. We consider mode converted energy to be an intrinsic part of the dataset and we incorporate its processing into our reports as standard. Work with 2d, 3d, 4d, multicomponent or full azimuth from land, marine, seabed or borehole. Analyses were done in seisspace software landmark halliburton and.