Seismic data interpretation in the exploration domain. Processing of multichannel seismic reflection data acquired. Well velocity or check shot survey data were not available and the only source of velocity data in the well log dataset was obtained from the compressional. Seismic 2d reflection processing and interpretation of. This 2d and 3d seismic interpretation training seminar will focus on reflection seismic, one of the fundamental ways of imaging the subsurface from a geological perspective. Dec 15, 2016 principles of seismic data interpretation m. Opendtect is released under the gnu public license gpl. Fault interpretation in seismic reflection data digital. Each streamer can be up to 12 kilometres long and is towed six to 15 metres below the water surface to reduce the effect of ocean waves on the data. Although it is certainly possible to interpret the 3d seismic volume as a dense 2 d grid in fact, some early interactive interpretation systems actually encouraged this, this is neither an effective nor an efficient approach to the interpretation. Currently construction of the underground research facility, onkalo, is going on at the olkiluoto site. The actual seismic data in a seg y file is made up of a series of individual seismic records, known as the data traces. In addition to the developments in all aspects of conventional processing, this content represents a comprehensive and complete coverage of the modern trends in the seismic industryfrom time to depth, from 3d to 4d, from 4d to 4c, and from isotropy to anisotropy.
Basic concept of seismic exploration seismic events 2d vs. Introduction to 2d 3d seismic data acquisition and processing for nongeophysicists by k. When designing a 3d survey the most important factors to consider are the geologic requirements of the project. A 3d volume2d data sets, such as a filtered cubedata sets or any other type of cubedata set produced by the. Mechanostratigraphy vs structural style interpretation strategy workstation tips. Practical seismic data analysis download ebook pdf, epub. Rationalizes 2d and 3d segy data on disk and provides the opportunity to repair datasets to prepare them for problemfree uploading to workstations for processing, analysis, interpretation and other applications. Associated open file seismic survey company reports can also be downloaded from sarig. In the most technically advanced seismic surveys, up to 12 streamers are towed at the same time, each about 50 to 150 metres apart. Complementing the 3d view on the left is a crude correlation of the p data center and ps data right, which highlights some of the challenges of matching multicomponent seismic data. Pdf seismic data interpretation and evaluation for hydrocarbon.
Processing of multichannel seismic reflection data. Seismic interpretation an overview sciencedirect topics. To pursue the interpretation, 2d seismic data in segy format was used along. A 3d seismic data volume or 2d seismic data set most commonly as segy files the primary outputs are. Interpretation of any data, especially seismic data in petroleum exploration, needs to. A seismic interpretation study should access the following data sets 2d or 3d seismic data cube.
Course overview structural interpretation of seismic data file. Updated composite well data quality controlled, standardised and composited las data for 671 wells, loaded to kingdom and ready for regional studies. Seismic survey in a 2d survey, one source of energy and one set of receivers provide a two dimensional image of the rock layers below the surface. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed data driven chart and editable diagram s guaranteed to impress any audience.
This course discusses the seismic principles necessary for understanding the concepts of seismic data acquisition and processing. Petroleum exploration data pack new zealand petroleum. Multicomponent seismic data analysis for interval rock properties in the. Static reservoir modeling using well log and 3d seismic. Checklist and transmittal for reports and data related to.
Interpreting seismic profiles in terms of structure and stratigraphy. An interactive view on your data, display sections and slices view and compare locations from 2d seismic and navigation files. Interpretation of any data, especially seismic data in petroleum exploration. Opendtect is an open source seismic interpretation software system for processing, visualizing and interpreting multivolume seismic data, and for fasttrack development of innovative interpretation tools. Seismic data interpretation and evaluation for hydrocarbon.
Well data are gotten from rock samples and measurements at depth from a wellbore. For example, we can examine vertical sections in inline, crossline, or any arbitrary direction, as well as horizontal sections, namely, time slices. Although many wells drilled into igneous rocks are based on the interpretation of 2d seismic data, misinterpretation still occurs today using highquality 3d seismic data. Geometry assignment field data promax 2d seismic processing and analysis.
At this point of a project you will likely perform a similar powerpoint stretchandsqueeze to show yourself, and perhaps your manager, the quality of. Us20150234070a1 computerassisted fault interpretation. Survey name operator petroleum title survey type 2d ss non3d ss. A typical seismic survey involves creating seismic waves by explosion in a hole in the ground. A 3d volume 2d data sets, such as a filtered cube data sets or any other type of cube data set produced by the. Interpreting seismic profiles in terms of structure and stratigraphy, an example from lower indus basin pakistan. Opendtect is a free, open source seismic interpretation system and software development platform. Seismic data interpretation in the exploration domain by tim e. This book introduces readers to the field of seismic data interpretation and. Structural interpretation from seismic data is indeed a difficult endeavor.
Multiclient data library reservoir characterization. Static reservoir modeling using well log and 3d seismic data. Department of the interior bureau of ocean energy management, two grids of twodimensional multichannel seismic reflection data were acquired in the gulf of mexico over lease blocks green canyon 955 and walker ridge 3 between april 18 and may 3, 20. Reconnaissance surveys of 2d seismic data are acquired before most 3d seismic surveys to define the area of interest and regional trends. Introduction to 2d3d seismic data acquisition and processing. Only 2d data exist in the earliest stage of data collection. Shri rao is well versed with all other types of seismic interpretation softwares.
Datasets have been consolidated, edited and uploaded for the following basins. Loadinggg a single 2d line 5 scanning the seismic is an important step. To improve data quality and reduce noise in the data each subsurface point is multiply sampled to increase what is called fold. To load 2d seismic data to seisworks project follow the steps below. This twoday course provides a robust background in both the fundamentals and advanced aspects of. We improve the search of seismic structures by precalculating the horizon structures of the seismic data prior to interpretation. Optionally opendtect can be extended with closed source commercial plugins.
Basics of land seismic data interpretation international journal of. Moreover, an interactive environment is versatile in viewing the 3d data volume. Visual interpretation of seismic profiles is transformed into 2d and 3d time and depth domain contour maps, which is the representation of true subsurface geology. Also it is common to do a slice by slice interpretation of the seismic volume. Checklist and transmittal for reports and data related to seismic survey. Horizon interpretation y all standard picking methods are supported. In addition to the developments in all aspects of conventional processing, this twovolume set represents a. Request pdf seismic data interpretation and evaluation for hydrocarbon. All interpretation tools are available in this window and the view can be zoomed, stretched, and squeezed in either direction. Seismic 2d reflection processing and interpretation of shallow refraction data abstract posiva oy takes care of the final disposal of spent nuclear fuel in finland. A 4d survey is a 3d survey repeated multiple times in. Several geological and technical parameters may be related to the noise. Updated well and seismic data new open file data for an additional 41 wells, and additional 9,6 line kms of 2d and 3,393 km2 of 3d seismic data.
The drawback of seismic insitu data is their complexity, their noise, and their nonlinear relation to the geology. The system supports all tools needed for visualizing, analyzing and interpreting 2d, 3d and 4d seismic data. The usgs has reprocessed 22 regional seismic transects. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. This publication is the definitive, and now classic, text on the subject of interpretation of 3d seismic data. Back to openworks and click application poststackpal choose your seisworks project. Interpretation on each line should proceed from wellimaged, wellconstrained portions of the line toward areas of poorer constraint. Mar 19, 2009 to load 2d seismic data to seisworks project follow the steps below.
Seismic data consists of a series of recorded wiggle traces that describe a set of echoes from interfaces. However, 2d surveys provide the basic data and hence are of utmost importance. Pdf interpreting seismic profiles in terms of structure. Opendtect is a seismic attribute processing, visualization and interpretation system. If the operation is stopped, then no traces will appear. The usgs has reprocessed 22 regional seismic transects across. Threedimensional seismic interpretation is not just dense 2 d seismic interpretation. The seismic interpretation window gives the user a classical 2d view of seismic data. Pdf interpreting seismic profiles in terms of structure and. If the seismic navigation is already embedded in segy data. Digitization and interpretation of vintage 2d seismic reflection data. Oz yilmaz has expanded his original work on processing to include inversion and interpretation of seismic data. A group of 2d seismic lines acquired individually, as opposed to the multiple closely spaced lines acquired together that constitute 3d seismic data.
The gaia digital subsurface platform integrates the worlds available datafrom structured data such as seismic, wells, and production to unstructured content such as news and market reports. The task of interpreting seismic data requires a broad range of skills and knowledge that must tie information at. Petroleum exploration data pack new zealand petroleum and. These waves travel in all directions and get reflected from certain subsurface. This multiple sampling will increase signal while random environmental noise often wind in the data will tend to cancel out. An expert system for seismic data interpretation using. Practical interpretation of multicomponent seismic data. It is a large 6mb file that may take some time to open and download. Conceived in 1979 and first published in 1986, the book helps geoscientists extract more information from their seismic data and improve the quality of their interpretations.
Basin, the south whale basin and west grand banks area, integrating all available data wells, 2d seismic lines, gravity and magnetic maps. It is widely used for georadar interpretation as well. The study was carried out to overcome this problem by incorporating 3d seismic data interpretation and well data to develop 3d static model that would make the data more reliable. In year 2001 olkiluoto was selected for the site of final disposal. A 4d survey is a 3d survey repeated multiple times in order to observe changes in the. Depending on the type of data 2d, 3d, gathers etc, these data traces will be organised in a particular fashion in order to be loaded and displayed correctly in the interpretation software. The use of an interactive interpretation workstation is a common way to deal with large 3d data volumes. Acquisition and processing of marine seismic data demonstrates the main principles, required equipment, and suitable selection of parameters in 2d3d marine seismic data acquisition, as well as theoretical principles of 2d.
Stratigraphic analysis comprises of interpreted seismic section. To address this challenge, we analyze the seismic expression of andesitic volcanoes in the taranaki basin, new zealand and use it to help understand misinterpreted igneous. The present study concerns only with 2d seismic data interpretation. Well data required for interpretation are wireline logs gamma ray logs, resistivity logs, porosity log, sonic logs, density logs and neutron logs or equivalent rock property model, check shot data. To demonstrate this, a grid of 2d marine seismic lines, accompanied by well data, was provided by the geological survey of sweden. Integrated well log and 2d seismic data interpretation to. How to load 2d seismic data to seisworks house of sciences. Reflection coefficient convolution theorem seismic resolution. The time of the operation is dependent on the size of the data set. While seismic attributes are routinely applied to 3d data, they are less commonly applied to 2d data. To serve this purpose, 2d seismic data in segy format was used along with. Inlines, crosslines, time slices and other line types can be displayed in an interpretation window. This twoday course provides a robust background in both the fundamentals and advanced aspects of 2d and 3d reflection seismic interpretation.