Posted on April 01, 2017
Offshore and Onshore Preprocessing accommodating non-horizontal acquisition surfaces, unknown rough sea surfaces, on-shore ground roll removal without damaging reflection data, — and the positive impact these preprocessing advances have on subsequent ISS free surface multiple elimination, internal multiple attenuation, internal multiple elimination and our new Stolt extended Claerbout III depth imaging in heterogeneous media.
Impact of the shape of the acquisition surface on the effectiveness of the ISS internal multiple attenuation and elimination algorithms: analyzing the problem and providing a response to the challenge
Yuchang Shen and Arthur Weglein, M-OSRP, University of Houston
A new method for deghosting data collected on a depth-variable acquisition surface by combining Green’s theorem wave separation followed by a Stolt extended Claerbout III wave prediction for one-way propagating waves
Jing Wu and Arthur Weglein, M-OSRP, University of Houston
3-D source and receiver deghosting in the space-frequency domain using a depth-variable measurement surface: an initial off-shore synthetic data study with anticipated on-shore and ocean bottom application
Zhen Zhang and Arthur Weglein, M-OSRP, University of Houston
Multi-dimensional internal-multiple elimination needed when primaries and internal multiples interfere and achieved without damaging primaries( the ISS internal multiple attenuation algorithm has as an ingredient a water speed Stolt extended Claerbout III imaging, the only migration method that automatically accommodates specular and non-specular reflectors /multiple generators- without needing to know or to determine those generators or any subsurface properties).
A multidimensional method that eliminates internal multiples: a new toolbox option for removing multiples that interfere with primaries, without damaging the primary, and without any knowledge of subsurface properties
Yanglei Zou, Chao Ma, and Arthur Weglein, M-OSRP, University of Houston
Comparing the new Inverse Scattering Series (ISS) internal-multiple-elimination algorithm and the industry-standard ISS internal-multiple-attenuation algorithm plus adaptive subtraction when primaries and internal multiples interfere and where we can evaluate the efficacy using wave-theoretical data consisting of only primaries
Chao Ma, Yanglei Zou, and Arthur Weglein, M-OSRP, University of Houston
A first migration that is equally effective at all frequencies at the target and reservoir - resolution comparison of our new migration with RTM for a single reflector and for a wedge. The new migration method from M-OSRP is a Stolt extended Claerbout III migration for heterogeneous media.
An initial study to quantify the resolution difference between an industry leading-edge migration, RTM, and the first migration method that is equally effective at all frequencies at the target
Qiang Fu, Yanglei Zou, and Arthur Weglein, M-OSRP, University of Houston
A wedge resolution comparison between RTM and the first migration method that is equally effective at all frequencies at the target: tests and analysis with both conventional and broadband data
Yanglei Zou, Qiang Fu, and Arthur Weglein, M-OSRP, University of Houston
“The first migration method that is equally effective for all acquired frequencies for imaging and inverting at the target and reservoir”, SEG, 2016
“A direct inverse method for subsurface properties: the conceptual and practical benefit and added-value in comparison with all current indirect methods, for example, AVO and FWI”
“Multiples : Signal or Noise?” Geophysics, August 2016
“ISS direct depth imaging without a velocity model : first field data Results”, JSE 2012
The note below provides a brief summary of the projects, goals and deliverables within our program, and our plans going forward in 2017
In the link below please find videos and documents that describe where we are and where we are going in terms of projects, goals, deliverables and impact.
Below please find a succinct list and summary of the projects within M-OSRP:
Key–note address, Abu Dhabi, March 31st , 2015 presented at the SEG FWI, Workshop Filling the gaps in Abu-Dhabi
GAME CHANGING MIGRATION, DIRECT AND WITHOUT A VELOCITY MODEL The direct inverse scattering series ( ISS) depth imaging without a velocity model will be progressed and delivered as a tool box option. In contrast to other new approaches to migration , for example, Interferometry and Marchenko imaging , that require a velocity model, the ISS direct imaging method is the only imaging method that is direct and doesn’t require a macro-velocity model or any other subsurface information.
The ISS direct depth imaging ( without a velocity )subseries derives from the same exact set of equations ,the inverse scattering series, that earlier derived, e.g. , the distinct ISS free surface and internal multiple subseries, and the subseries that performs Q compensation without knowing or needing to estimate Q. The ISS depth imaging subseries will once again have the same GAME-CHANGING delivery and impact and will play the same role, on processing primaries for structural determination and amplitude analysis , as ISS free surface and internal multiple removal has already delivered for effectively eliminating multiples. M-OSRP has the potential and opportunity to deliver that game changing next generation imaging effectiveness and capability- providing a new tool box option for the most complex, inaccessible and daunting imaging challenges- arranging for currently inaccessible targets and reservoirs to become accessible and delivered.
The projects listed above represent a comprehensive approach to addressing prioritized seismic exploration challenges, and a portfolio of deliverables including high impact game-changing multiple removal, imaging and inversion. That’s the M-OSRP business model and return on investment.
We look forward to staying in touch and seeing you May 23-24 at the 2017 M-OSRP Annual Technical Review.