Stratigraphic correlation of well logs using relational tree. Any depth calibrated log is ready for correlation with manual picks or autoposting of imported picks. The 3d view could include the 3d model integrated with. Log editing is fundamental to well data analysis and an integral to the success of all projects requiring log data. Deviated wells can be displayed overlain on seismic or 3d grid properties. Such facies variations create challenges to spot and drill productive intervals within the arbuckle. Quick detection of inconsistencies between seismic data, petrophysical data, well.
Data used were well logs, seismic section and the structural map of the top of the sand. Following a check shot correction, a manual log correction can be performed to optimize the welltoseismic correlation in time. The comparison of seismic waveforms in the time domain, similar to coherence in the frequency domain. The well correlation consists of mapping one wells intervals to another wells. Seismic interpretation blog from geoteric 3d seismic. Build interactively a geological correlation panel across well log data, in a log or seismic view, at any location along the trajectory by slicing horizons and creating 3d geological layers. Encana was tasked with migrating geoscientists to a pc based software platform.
Log correlation can be done in log to log mode or in the cross section. Cross section software log correlation contour mapping. Geological interpretation software using petra ihs markit. Relating well log data, measured in depth, to seismic data, measured in time, typically requires estimating well log impedance and a timetodepth relationship using available sonic and density logs. Free, lowcost, and open access data and software for.
The collection of data enabled to read the depth of log borehole, types of lithology by the principles of gamma, neutron, density, etc. Sonic logs measure the travel time of seismic waves reflected through the formation. A three dimensional seismic, well logs and structural interpretation of a field in the niger delta was done to determine the reservoir properties and volume of hydrocarbon contained within the sand interval at the depth investigated. The calculations of well log interpretation reveals.
Unlike conventional interpretation tools, it supports highvolume, geologic interpretations and boosts productivity. Powerful, easy to use analysis software correlating. Captures uncertainty via multiscenario and interpretation of fuzzy well markers. The basic difficulty of automatic correlation of well intervals is the fact that in advance it is not known which stratigraphic horizons were kept unchanged. Geographix smartsection 3d well log correlation and mapping. Waveforms well logs are represented in a data structure known as a relational tree.
The wavelet used for generating synthetic can be either statistical or from the data itself. The well log correlation model is obtained by constructing the optimal trajectory in the field of the function f x 1, x 2 and solving problem 3. Why do deviated wells show poor correlation to seismic data. Inpefa a well correlation tool for petrel description and. Jun 14, 2018 relating well log data, measured in depth, to seismic data, measured in time, typically requires estimating well log impedance and a timetodepth relationship using available sonic and density logs. A detailed multiwell wavelet extraction scheme has been developed to increase the likelihood of achieving a high correlation and consistency between seismic and well data.
Quickly go from data access and viewing, to analysis, to seamlessly exporting synthetics and 2d models into your geophysical. Visualization of 2d correlation panels with logs, markers and stratigraphy. Possibly the most optionpacked correlation system available, stratearth offers great graphics and convenient correlation tools. It was then in oct 2009 haliburton launched geographix discovery 3d software, one of the first oil and gas solutions to leverage stateoftheart interactive visualization tools from microsofts xbox gaming console and the 64bit capabilities and performance of the new microsoft windows 7 operating system. Easytrace well log analysis easytrace is a multidisciplinary 1d data processing and editing tool, featuring under a very productive package a wide range of functionalities for geologists, geophysicists and reservoir engineers. Interpretation of the keller 3d seismic data, well log correlation and a study and description of the drilling samples suggest that the arbuckle facies vary within short distances in the research area. Unlike conventional interpretation tools, it supports highvolume, geologic. Well tops and horizon interpretation are checked and vertical differences automatically quantified in an interactive table. Inpefa a well correlation tool for petrel description. Well correlation and calibration is an important step in any type of seismic inversion. The projects interpreters complete processes such as interpretation of 2d seismic lines and 3d seismic volumes both modern and legacy, synthetic seismogram generation, well log display, correlation, and interpretation, velocity analysis, and 3d visualization. Seisware won the contract in july 2004 and continues to be the seismic interpretation choice at encana. Contours, simple faults, fault polygons and seismic facies can be captured and output in standard formats, as well as shot point, cultural data, block boundary and well head data.
To gain a better understanding of the subsurface, start your. The major faultse andf with conjugated fractures interpreted in the seismic section are examined to correlate with the wells wz7 and 9. The authors have devised a twolevel expert system for a well log correlation which addresses this nonclosure problem. Kingdom seismic and geological interpretation software ihs. Seismic drilling solutions reservoir characterization. Seisware continues to be the seismic interpretation choice at encana. This correction ties each individual well to the seismic by a comparing its synthetic. The well correlation panel wcp plugin is used to pick and qc well markers and to correlate these from welltowell. Geophysics software seismic interpretation software. The petrel well correlation module provides a clean correlation canvas on which to display logs, core images, seismic data, grid data, and even completions and simulation resultswhich can be played through time.
Markers can be picked in an interactive viewer with, or without seismic data to guide the correlations. Fig 3 base map of the study area with well locations methodology seismic inversion utilizes the seismic data, well logs, seismic velocity and interpreted horizons to generate impedance data. Build interactively a geological correlation panel across well log data, in a log or seismic view. A detailed multi well wavelet extraction scheme has been developed to increase the likelihood of achieving a high correlation and consistency between seismic and well data. Apr 09, 2019 inpefa is a petrel plugin which aids the correlation of wireline log data, and the identification of stratigraphic packages by picking out lithological trends in well data. While the relative importance of well log data has been displayed, it is also relevant to understand the importance of parameters required to be stored in the data. New seismic to production software offers fast, lowcost evaluations. The well correlation panel wcp plugin is used to pick and qc well markers and to. A well section was created for the well to seismic tie, the sonic log, density and gamma ray log of oak7 well superimposed on inline 6010 that it passed through, to have an accurate correlation of both the log and the section.
In order to obtain this result, you should do the stretch and squeeze process keeping it realistic and conservative. Hints and tips for using geoterics well log correlation tool. Conclusion the main part of work is on interpretation of seismic and well log. Integrated synthetic seismogram workflows unify, within the same canvas, the impact from the sonic calibration to the. Combining well log with seismic sequence analysis aapg wiki. Well log data management logdb its role and application. Validates coherency between interpretation and reservoir models through data integration. Missing well log estimation by multiple welllog correlation.
In practice any log sensitive to lithologic change can be used, and all logs are normalized to a scale of0 100. Inpefa is a petrel plugin which aids the correlation of wireline log data, and the identification of stratigraphic packages by picking out. This log can be used as well to infer the hydrogen, carbon and oxygen present in the formation. With petra, you can quickly visualize results using mapping, crosssections, seismic interpretations, log plots, crossplots, production and reservoir analysis, and 3d visualization. Neurasection is the only geological interpretation system available with the image quality to truly support raster and digital well log correlation, cross section creation and analysis. Welltowell log correlation using knowledgebased systems. Kingdom seismic and geological interpretation software. Petrel well correlation provides a clean correlation canvas on which to display logs, core images, seismic data, grid data, and even completions and simulation resultswhich can be played through time. Powerful, easy to use analysis software correlating digital log data to seismic cost effective and easytouse, geosyn is a synthetic generation, avo analysis and 2d modeling package designed for geoscientists. Interpretation of the keller 3d seismic data, welllog correlation and a study and description of the drilling samples suggest that the arbuckle facies vary within short distances in the research area. In order to obtain a good broadband frequency model, the synthetics should be correlated with original seismic data. Inpefa is a petrel plugin which aids the correlation of wireline log data, and the identification of stratigraphic packages by picking out lithological trends in well data. Gverse geophysics software is a powerful, fully integrated 2d and 3d seismic interpretation system that provides a full range of fitforpurpose interpretation capabilities, attribute analysis, and mapping tools. Users can geosteer horizontal and highly deviated wells with schlumberger lwd tools in real time, and deviated wells can be displayed overlain.
Possibly the most optionpacked correlation system available, stratearth offers great graphics and. Improves correlation through 2d and 3d seismic and geologic data covisualization. The well correlation consists of mapping one well s intervals to another wells. The goal of using a synthetic seismogram is to match stratigraphy as seen in well logs or outcrops to seismic field data. Well correlation our geoscience specialists share their insights into 3d seismic interpretation. Combining derived attribute maps and seismicwell log attribute cross plots will lead to a better understanding and more. Neurasection uses your existing log images and digital files and autoloads them to the database or format you need to become your integrated interpretation solution. Stratearth well log correlation can be used in any geologic environment. Horizontal well correlation decisionspace horizontal well correlation software is designed to give onshore and offshore operators realtime subsurface intelligence to better optimize their drilling programs. Seismic and well log attribute analysis of the jurassic.
The optimal line was constructed using an ant colony algorithm dorigo, 1992 and a wave algorithm lee, 1961. Nash, phdaapg director of education and professional development, tulsa, ok bryan flynngeophysicisthgs continuing education committee, houston thom tucker, cpghgs continuing education committee, houston imagine a geologist, an engineer, and a landman sitting at their local. N and the value obtained in the previous equation for. Seismic data can either be a 2d line, or a random track from a 3d volume. Well seismic fusion prestack interpretation software. Log to seismic correlation can determine an accurate timedepth relationship between the wells and the seismic volume. Edit logs to ensure accurate synthetic generation from model and extracted wavelets, stretch and squeeze to calibrate depth data with time seismic, then use cross correlation analysis to quantitatively evaluate well ties with seismic data. Free, lowcost, and open access data and software for petroleum exploration and production susan s. Gmimodelbuilder uses well log information to calculate overburden and pore pressure. Correlation of well logs as a multidimensional optimization problem. Seisworks used for mapping correlation seisworks 3d software provides innovative 3d viewing and interpretation capabilities and easytouse interpretation productivity tools to support and enhance horizon and fault interpretation. Welllogging correlation analysis and correlation of well. Neurasection uses your existing log images and digital files and autoloads them to the database or format you need to become your integrated.
Petrel well correlation provides a clean correlation canvas on which to display logs, core images, seismic data, grid data, and even completions and simulation. After well logs and seismic sections have been analyzed for sequences, well log and seismic interpretations should be tied together by generating a synthetic seismogram from log information. Geographix smartsection is a 3d geomodeling application that combines the industrys most intuitive log correlation capabilities with advanced tools for 3d surface modeling, sequence stratigraphy, structural analysis, and horizontal well correlation. Integrated well log and 3d seismic data interpretation for the. In 2007 2008 established business relationship with whitestar data and spatial energy. Geophysics was one of four products we tested as part of the rfp. Aug 14, 2017 geological analysis starts from well correlation. The paradigm stratearth well log correlation application is a comprehensive, easytouse solution for the correlation, interpretation, mapping, display and qc of seismic, geologic, and production data in multiple 2d and 3d environments.
Well data are often acquired in different formats, with different sampling rates, requiring appropriate. Following a check shot correction, a manual log correction can be performed to optimize the well to seismic correlation in time. Kingdom software provides geoscientists and asset teams the functionality needed for all aspects of their portfolio management from prospect to production, basic and advanced interpretation to microseismic analysis and geosteering resulting in faster interpretation and modeling sharing of complex data and more confident decision making. Integrated well log and 3d seismic data interpretation. It is a special case of one of the most complicated mathematical problem so called image recognition problem. The first step in the inversion workflow is the well to seismic tie which has shown high degree of correlation 80% fig. Log display together with seismic, production data and correlation. A relational tree provides a complete description of the. Petrel seismic well tie enables interactive checkshot calibration of sonic log data, analytical wavelet creation, statistical and deterministic wavelet extraction, and synthetic seismogram generation for 2d and 3d seismic data. These associations exist between seismic attributes such as amplitude, reflection strength and energy halftime and well log attributes such as gamma ray values, entradacurtis thickness and porosity. To maximize your subscription, ihs markit offers technical support as well as petra training courses at select locations and on site, by request. To streamline the correlation process, ges provides multiple tools. One limitation of conventional either manual or machine well log correlation is that correlation loops do not close. Nash, phdaapg director of education and professional development, tulsa, ok bryan flynngeophysicisthgs continuing education committee, houston thom tucker, cpghgs continuing education committee, houston imagine a geologist, an engineer, and a landman.
The field data need to have been migrated, since only then does the time axis represent vertical traveltime, which is calculated from sonic log measurements. Coordinate systems may be modified on output from the digitizing software and digitized data may be redisplayed as colour plots at a range of scales. Inpefa a well correlation tool for petrel description and case. Stratigraphic correlation of well logs using relational. The well correlation panel wcp plugin is used to pick and qc well markers and to correlate these from well to well. Seismic interpretation software powerful, 2d and 3d seismic interpretation system for rapid prospect generation.
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