Nigeria Reprocessed MC3D Data Now Available

Phase one of the PGS data library rejuvenation efforts in Nigeria are complete with significant imaging uplifts seen in the first MultiClient depth data over open blocks OPL 314/315/321/323.

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Location of the survey with block outlines

First MultiClient Depth Data Available in Nigeria

This newly reprocessed MC3D data covers 2 969 sq. km over open blocks OPL 314, 315, 321, and 323 in the northern offshore region of Nigeria. The area was originally acquired and processed in the time domain during 2004, the new 2019 reprocessing efforts focus on producing both pre-stack time and depth data to give explorers a clearer image of complex structure and to allow AVO analysis of deep marine stacked channel complexes.

Modern Reprocessing Techniques

A suite of optimized denoising algorithms, coupled with a full deghosting sequence, has improved the data bandwidth and signal-to-noise ratio. The multiple attenuation sequence eliminates stubborn and complex multiples. A full velocity model building sequence in the depth domain, together with a depth migration, has improved image integrity.

New PSDM (stretched back to time) dip-line showing enhanced imaging of stacked Miocene targets along with pre- and post-shale faulting


Legacy PSTM dip-line

Enhanced Imaging of Targets

At the meeting point between the Benin Embayment and the Benue Trough, this dataset forms the missing link that connects the West Africa Transform Margin with the Niger Delta Basin enabling integrated exploration of the north and western Gulf of Guinea region. The reprocessed dataset covers the zone of shale diapirism and outer thrusting in the northern Niger Delta Basin where shale movement has generated excellent hydrocarbon trapping potential. Analogs of proven Miocene reservoir targets in the Bosi-1 (1996) and Oyo North (2018) fields to the southeast are well imaged in the newly reprocessed data. Pre-stack data allows for AVO analysis of Agbada Formation turbiditic reservoirs underlain by the oil mature Akata Formation marine source rock. Sharper imaging of complex faulting associated with shale movement has been achieved and pre-shale potential is also more clearly imaged through the full velocity model building depth workflow.

RMS amplitude extraction in the Miocene overlain on the Top Akata Formation shale surface highlighting the complex turbidite channel deposition controlled by shale diapirism across the survey area


Trace integration highlighting an active petroleum system with free gas indicated below a clear bottom simulating reflector. Post shale structural and stratigraphic potential is well imaged, along with improved pre-shale imaging achieved through the PSDM workflow

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