Wide Azimuth Acquisition with Radial Domain Interpolation for Fluvial Morphology Interpretation

Poole, A.; Bilsby, P.; Giles, M.; Morgan, Gareth

doi:10.3997/2214-4609.201413182

Cited by 2 publications

(1 citation statement)

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“…The more symmetrical azimuthal sampling of FAZ surveys offers the opportunity for azimuthal AVO inversion that can lead to identification of fracture networks within the subsurface . Munathiri 3D was acquired in this mode to investigate both conventional and unconventional targets of the Cooper Basin at depths of over 2000 m. It was processed through an inversion ready workflow using the application of a multi-dimensional interpolation technique and multi-azimuth processing to generate individual azimuth/angle stack volumes as input for azimuthal inversion and for final full stack image creation (Poole et al, 2015). Well calibration and validation was required to aid the interpretation of the azimuthal attributes generated by AVOAz inversion such as slow and fast shear velocity directions.…”

Section: Methods and Resultsmentioning

confidence: 99%

Multi-Azimuthal Walkway VSP for Full Azimuth Seismic Calibration

Galybin¹,

Poole

Giles³

2016

ASEG Extended Abstracts

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Comprehensive borehole seismic surveys hold the key to unlocking the knowledge contained within the long-offset full-azimuth surface seismic surveys that are fast becoming common in land exploration. This paper presents a case study of acquisition, processing and use of such survey for validation and calibration of processing parameters and inversion results of a recent pointsource/point-receiver 3D surface seismic dataset acquired in the Cooper Basin.The 3D surface seismic data have been initially processed without significant borehole seismic data input. However, as the processing revealed gaps in knowledge, the need for borehole calibration was realised. This led to acquisition of a complex borehole seismic survey in a gas-discovery well comprising Multi-Azimuthal Walkaway (MAZ WVSP), Walkaround and Zero Offset Vertical Seismic Profiles (ZVSP). The acquired dataset shed light into the peg-leg multiple mechanisms as well as the VTI and azimuthal anisotropy. Advanced processing techniques such as calibrated piece-wise VTI inversion and azimuthal travel time fitting were applied to the MAZ WVSP data to validate the processing steps of the 3D surface seismic data and calibrate the results of its AVOaz inversion.Apart from showing some of the results of this study, this paper documents the various contact points between VSP and surface seismic datasets and how the results of processing complement each other. The final result comprised a calibrated seismic map of drilling targets.

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Section: Methods and Resultsmentioning

confidence: 99%

Multi-Azimuthal Walkway VSP for Full Azimuth Seismic Calibration

Galybin¹,

Poole

Giles³

2016

ASEG Extended Abstracts

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Exploration Challenges in the Northern Emirates: A UniQ Approach to Structural Definition

Trezzi

Glushchenko

Vasilyev

et al. 2019

Day 2 Tue, November 12, 2019

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This study summarizes the efforts taken to provide reliable structural delineations offshore the northern United Arab Emirates, an area where previous attempts failed to provide purposeful results. With the employment of latest acquisition and processing techniques, a new high-density full azimuth volume shows clear uplift over legacy results. Structures never detected before are imaged, contributing to the de-risking of future well placement. These results are indicative of the challenges when acquiring and processing seismic data in the Northern Emirates. The use of latest technologies was required to overcome several geophysical challenges, such as complex near surface, near-vertical thrust sequences and multiple faulting planes. All these elements contributed in generating extreme noise contamination, where a fast-varying geology with high dips made separation of primaries from noise one of the most difficult tasks. Key pre-imaging technologies such as near surface characterization, 5D regularization to radial symmetry, as well as a tomographic velocity model building approach with iterative inputs from interpreters have been fundamental to converge to a solid velocity model that allows for a reliable structural imaging. The work is particularly relevant for offshore exploration targets in the Northern Emirates, a region that has recently seen a growth in interest from local and international operators.

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Wide Azimuth Acquisition with Radial Domain Interpolation for Fluvial Morphology Interpretation

Cited by 2 publications

References 0 publications

Multi-Azimuthal Walkway VSP for Full Azimuth Seismic Calibration

Multi-Azimuthal Walkway VSP for Full Azimuth Seismic Calibration

Exploration Challenges in the Northern Emirates: A UniQ Approach to Structural Definition

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