Subsalt Imaging Challenges - A Deepwater Imaging Analysis
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چکیده
منابع مشابه
Technique Enhances Subsalt Imaging
HOUSTON–Technology advances such as wide-azimuth/full-azimuth (WAZ/FAZ) acquisition, reverse-time migration (RTM) and iterative salt imaging in model building have greatly improved subsalt image quality. In the Gulf of Mexico, steeply dipping three-way closures are familiar subsalt targets. However, despite these imaging improvements, some of these targets remain poorly imaged. The fundamental ...
متن کاملSubsalt imaging by common-azimuth migration
The comparison of subsalt images obtained by common-azimuth migration and singlearrival Kirchhoff migration demonstrates the potential of wave-equation migration when the velocity model causes complex multipathing. Subsalt reflectors are better imaged and the typical Kirchhoff artifacts caused by severe multipathing disappear. A detailed analysis of common-azimuth images indicates that the resu...
متن کاملComplex salt model building using a combination of interactive imaging and layer‐ stripping RTM
s, 26, 2140–2143. Mosher, C., Keskula E., Malloy, J., Keys, R., Zhang, H. and Jin, S. [2007] Iterative imaging for subsalt interpretation and model building. The Leading Edge, 26, 1424–1428. Ortigosa, F., Liao, Q., Guitton, A. and Cai, W. [2008] Speeding up RTM velocity model building beyond algorithmics. 78 SEG Annual Meeting, Expanded Abstracts, 27, 3219–3223. Reasnor, M.D. [2007] Salt interp...
متن کاملReverse Time Migration Using Vector Offset Output to Improve Subsalt Imaging – A Case Study at the Walker Ridge GOM
Technology advances, such as WAZ/FAZ acquisition, reverse time migration (RTM) and iterative salt imaging in model building, have greatly improved subsalt image quality. However subsalt imaging under complex salt overburden is still challenging. The fundamental issue lies with the imperfect illumination from limited acquisition. In the poor illumination zones, the migration artifacts and cohere...
متن کامل3-d Prestack Wave-equation Imaging: a Rapidly Evolving Technology Biondo Biondi*, Robert G. Clapp, Paul Sava and Marie Prucha
Wave-equation migration is an accurate and robust alternative to Kirchhoff migration when multipathing and other complex wave phenomena occur, such as in subsalt exploration. In these situations, images obtained by wave-equation migration are often superior to images obtained by Kirchhoff methods. However, 3-D wave-equation prestack imaging is an immature technology compared with Kirchhoff imag...
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تاریخ انتشار 2011