Pdf crosswell electromagnetic tomography in haradh field. He has processed or supervised the processing of more than fifty crosswell profiles and he has continued his prolific publishing on aspects of crosswell seismic imaging. Deszczpan abstract electrical conductivity is an important petroleum reservoir parameter because of its sensitivity to porosity, pore fluid type, and saturation. Professor link earned a ba 1971 in physics from the university of iowa, a bs 1985 in geophysical engineering from montana tech, and a ph. Timelapse 3d electrical resistance tomography inversion for. Crosswell geophysical tomography dines and lytle, 1979. Pdf objectbased inversion of crosswell radar tomography. Chapter, crossborehole tomography in development geology. Efficient threedimensional data inversion department of computer.
Our reconstruction processing engine is optimized for multicore processors, efficient memory access and low cost graphics processing card. Sharp boundary inversion in crosswell traveltime tomography article pdf available in journal of geophysics and engineering 32. Timelapse crosswell seismic tomogram interpretation. Deeplookem crosswell electromagnetic imaging service. To download this file you first sign in to your schlumberger account. The method is used in radiology, archaeology, biology, atmospheric science, geophysics, oceanography, plasma physics, materials science, astrophysics, quantum information, and other areas of science. Journal of geophysics and engineering, volume 6, issue 4, december. Based on the grid ray tracing and regularized inversion approach, xw tomo is capable of deriving the velocity structure among multiple vertical or deviated wells, while also allowing groundsurface variation. With a industrial computed tomography system from zeiss, you can successfully perform measuring and inspection jobs yourself with only one xray scan. Curtis link faculty geophysical engineering montana tech. Industrial ct scanning has been used in many areas of industry for internal inspection of components. In this role spyros has led the development of methods for crosswell tomography and reflection imaging and implemented much of the software used by tomoseis for data processing.
Read volume 22 issue 4 of journal of environmental and engineering geophysics. I have compiled a list of references pertaining to travel time and electrical resistivity tomography and the inverse problem. Today, electromagnetic tomography in oil and gas industry is performed through crosswell tomography. There are many types of tomography, and i work with one called electron tomography. Crosswell em surveys were acquired across the three wells ref. Borehole rim6 uses lowwattage rf signals, propagated and received from adjacent subsurface boreholes, to produce tomographic images of the earth between the boreholes. Borehole seismic tomography developed from a series of lectures by james g. A technique for measuring a signal that is broadcast from a transmitter or source located in one well, to a receiver array placed in a neighboring well. In this work we designed a cascadelike hybrid tomography technology to solve the crosswell. We also work on image reconstruction for volumetric xray ct devices. Youngchul yu, 082007, analysis of crosswell seismic tomography for the underground cavity using field data and fdmodelling data, chungnam national university. In this software, we used travel time of seismic waves from source to receiver by using pseudo bending ray tracing method as input for tomography inversion.
Lecture notes on nonlinear inversion and tomography i. Some of these references are for developing the forward model, for example, vidale, 1990. Formation evaluation, geophysics a survey technique that measures the seismic signal transmitted from a source, located in one well, to a receiver array in a neighboring well. Timelapse 3d electrical resistance tomography inversion for crosswell monitoring of dissolved and supercritical co 2 flow at two field sites. A hybrid tomography method for crosswell seismic inversion abstract the full waveform inversion fwd is in general better than the ray tomography method. We can also set up a model parameterization, initial velocity model, ray tracing processes, conduct borehole seismic tomography inversion, and finally visualize the inversion results. Repeats of these surveys will be shot at intervals intended to capture an image of the co 2 plume at the midpoint between injectors and producers, after initial breakthrough, and after patterns crosswell seismic imaging crosswell seismic imaging in two pairs. Samuel croswell software engineer at primatech inc. Crosswell electromagnetic em imaging expands the scale investigated by resistivity logging to deliver the big picturebetween wells up to 3,280 ft 1,000 m apart. Digisens 3d tomography software solutions for industry and. The velocity between wells can be estimated with travel time.
Initial tomographic results, author vassiliou, a a and savage, c w and liner, c l and bozhurt, g and lines, l r, abstractnote four crosswell seismic surveys were acquired in the glenn pool field, the william b. Tomography is imaging by sections or sectioning through the use of any kind of penetrating wave. Aug 06, 2007 transmission electron tomography fills the gap between high resolution structural methods xray diffraction or nuclear magnetic resonance and optical microscopy. We accompany manufacturers in designing and dimensioning 3d systems and software solutions. This model is appropriate for many geological environments and reservoir delineation and monitoring applications. A survey technique that measures the seismic signal transmitted from a source, located in one well, to a receiver array in a neighboring well. Guinzy, 1993, crosswell seismic tomography in improved oil. The modernday test lab consists of multiple teams of engineers, all with specific tasks to carry out during the reverse engineering process. Spectralis anterior segment module heidelberg engineering. To my knowledge he is the first greek to be honored with a major award by the seg, and he represents the internationalization of the society. Spyros lazaratos is being honored as the 1997 recipient of the clarence karcher award for his seminal contributions to crosswell seismic imaging.
The highresolution images obtained with the spectralis anterior segment module show the layers of the cornea in detail and aid in the assessment of corneal thickness. Common challenges facing reverse engineering include many different types of equipment that may not be available, and not having the proper software and personnel to carry out the complex tasks. Timelapse crosswell seismic tomography for monitoring injected. Sensitivity of dipole magnetic tomography to magnetic. Implications for heavy oil reservoir characterization, thermal recovery process monitoring, and tomographic imaging technology. The goal of high resolution crosswell seismic profiling is to image weak and small scale heterogeneities imbedded in a background of strong, large scale variations. The standard acceptance test, the precision engineering and the sophisticated calibration process ensure the traceability of the system. Crosswell electromagnetic imaging service achieve resistivitybased imaging of fluid distribution in the interwell space. There are many programs designed to view tomograms, and i have listed some of the more popular choices below particularly programs which can segment and visualize. The reverse engineering process involves measuring an object and then reconstructing it as a 3d model. Using this data, one can proceed to the spatial distribution of such parameters as the. As an advanced technology in reservoir surveillance, crosswell em tomography can be used to estimate a crosssectional conductivity map and associated saturation profile at an interwell scale by exploiting the sharp contrast in conductivity between hydrocarbons and saline water. Spe 166140 crosswell magnetic sensing of superparamagnetic nanoparticles for subsurface applications amir reza rahmani, steve bryant, and chun huh, petroleum engineering. A tomogram is a series of 2d images, called slices which stack together to form a 3d image.
Custom sensors and complex systems from first sensor are successfully used e. Formation evaluation, geophysics a survey technique that measures the seismic signal transmitted from a source, located in. In spite of the large well separations an 850 m well spacing, the world record, the acquired em data were of high quality, and good station repeatability was obtained. The resulting data are processed to create a reflection image or to map the acoustic velocity or other properties velocities of p and swaves, for example of the area between wells. This technique measures the signal between an electromagnetic induction transmitter in one well, and a receiver array located in another well. A deeper look at our crosswell seismic technologies. Craig woerpel crosswell solutions advisor unconventional. The module also offers angletoangle imaging for efficient anterior chamber angle evaluation as well as detailed images of scleral structu. Development of the borehole 2d seismic tomography software. Department of civil and environmental engineering, university of vermont, burlington. Crosswell traveltime tomography in three dimensions geophysics.
By monitoring fluid distribution and movement on a reservoir scale, deeplookem service gives you information critical to optimizing sweep efficiency and identifying bypassed reserves. Computed tomography used in reverse engineering north star. In compliance with european union eu legislation for visitors from the eu, schlumberger requests your permission to place cookies on your computer to both. This technique is used to create a display of formation properties such as acoustic velocity and attenuation, seismic reflectivity, or electromagnetic resistivity in the area between wells. Efficient assimilation of crosswell electromagnetic data. Crosswell em measurements are emerging as an important reservoir characterization and monitoring tools, adding to the understanding of reservoir heterogeneity and fluid front evolution marion et al. Curtis link professor emeritus geophysical engineering. We developed new software for transmission electron tomography, tomoj. View craig woerpels profile on linkedin, the worlds largest professional community. Engineering tomography laboratory etl etl works in tomographic imaging techniques and inverse problem algorithms for applications ranging from industrial imaging to medical imaging and to imaging for material characterisation. Japans first pilotscale co2 sequestration experiment has been conducted in nagaoka, where 10 400 t of co2 have been injected in an onshore aquifer at a. X86 version of diinso is totally free and can be use in scientific purposes, but it also has not any guarantees, so use diinso at your own. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Seismic firstarrival tomography with functional description of. Operational specifications, electrical ratings, and size and weight specifications, can be provided for each system with approved request. I am a fresh graduate from ohio dominican university with a double major in software engineering and. As computeraided design has become more popular, reverse engineering has become a viable method to create a 3d virtual model of an existing physical part for use in 3d cad, cam, cae and other software.
Crosswell tomography has proved a useful tool in hydrocarbon reservoir development and engineering applications. Sharp boundary inversion in crosswell traveltime tomography. Pdf sharp boundary inversion in crosswell traveltime tomography. Industrial computed tomography ct scanning is any computeraided tomographic process, usually xray computed tomography, that uses irradiation to produce threedimensional internal and external representations of a scanned object. Crosshole seismic tomography crosshole seismic tomography cst method allows to obtain a detailed distribution of pressure p and shear s wave velocities in the crosswell space over the entire depth of study. Because seismic tomography measures the twodimensional velocity field between the. Directinverse solver diinso is an electrical resistivity tomography ert software which orient to solve 3d direct and 2d3d inverse problems on direct current dc. Sis offers inhouse 2d and 3d computed tomography software. Crosswell seismic data tomographicinversion processing steps and flowchart. Others look at different methods to solve the tomography problem. Formation evaluation a technique for measuring formation resistivity between two or more wells. Jim berrymans lecture notes on crosswell seismic tomography. The object based inversion of crosswell radar tomography data that was used to monitor vegetable oil injection was discussed. Crosswell magnetic sensing of superparamagnetic nanoparticles for subsurface applications amir reza rahmani, steve bryant, and chun huh, petroleum engineering department.
526 503 112 245 1486 1200 1139 895 523 41 68 782 563 502 1259 681 123 355 410 46 1123 632 754 1042 545 791 1332 231 580 687 916 1180 438 17 1079 876 395 784 1037 591 588 110 738 425 887 576 1053 886 977