Weathering structure of the east‐central Niger Delta, Nigeria

Uko, Etim D.; Ekine, Anthony S.; Ebeniro, J. O.; Ofoegbu, Charles O.

doi:10.1190/1.1443338

Cited by 14 publications

(12 citation statements)

References 6 publications

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“…Several researches on this near-surface zone had been conducted in the Niger Delta, Nigeria. Uko, et al (1992) determined the weathering structure of the Eastern-Central Niger Delta employing 168 LVL refraction survey data. Results show that the LVL thickness in this region is highly variable ranging between 2.9 and 45.5 m with a regional average of about 20.0 m. The weathered layer and the refractor beneath it have average compressional wave velocities of about 500 and 1732.0 ms -1 respectively.…”

Section: Introductionmentioning

confidence: 99%

Near-surface structural model for enhanced seismic data acquisition and processing in North-Central Niger Delta

Alaminiokuma¹,

Amonieah²

2012

AJSIR`

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Near-surface structural model was geostatistically developed from a sample density of 36 Uphole/LVL survey points to determine the properties of the weathering layer geological materials. Results from the generated Isopachs and Isovels show a dominant 2-weathered layer model with 1-weathered layer model in only five locations, mainly along the escarpment. The average thickness of the weathering layer to the first refractor consolidated layer is 18.84 m with an average velocity of 1791.40 ms . Proper application of these results will prove very useful and reliable for the enhancement of optimization processes during stages of seismic data processing and serve as baseline data for future 4D seismic data acquisition for accurate mapping of the deep underlying structures for oil and gas exploration in the North-Central part of the Niger Delta.

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Section: Introductionmentioning

confidence: 99%

Near-surface structural model for enhanced seismic data acquisition and processing in North-Central Niger Delta

Alaminiokuma¹,

Amonieah²

2012

AJSIR`

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“…1). The stratigraphic sequence of the Niger Delta basin has been described by Short and Stauble (1967), Ofoegbu (1985), Uko et al (1992). The Delta is composed of three major structural Formations: Akata, Agbada and Benin Formations (Fig.…”

Section: Causes and Effects Of Overpressurementioning

confidence: 99%

Overpressure Prediction In The North-West Niger Delta, Using Porosity Data

Uko¹

2013

IOSR-JAGG

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“…The stratigraphic sequence of the Niger Delta basin has been described by Short and Stauble (1967), Ofoegbu (1985), Uko et al (1992) and other workers. The Delta is composed of three major structural Formations: Akata, Agbada and Benin (Fig.…”

Section: Kirchoff Migration Modelmentioning

confidence: 99%

Comparison of seismic processing and interpretation tradeoffs between Kirchoff and finite-difference migrations, using poststack migrated data in the west Niger Delta, Nigeria

Uko¹,

Eze²,

Alaminiokuma³

2013

AJSMS

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The Kirchoff and Finite-Difference migrations were carried out on seismic data from the western part of the Niger Delta of Nigeria. The survey for the acquisition of the data was oriented southwest-north-east, at an angle of 45.4490 o . The KIRCH and FXMIG seismic migration programs were used to process and display the seismic sections. The sections were interpreted for diffractions, faults, and structures. It was observed that the dipping structures were incorrectly positioned downdip from the true reflection point. Prior to migration, the dipping structures were steeper and longer. For both Kirchoff and Finite-Difference migrations, there was proper imaging of the dipping structures. The structures were accurately moved updip and diffractions collapsed. The faulting pattern is a growth fault system as is generally the case in the Niger Delta basin. The reflectors became shorter, anticlines more clearly defined, and reflection events terminating at fault planes. Finite-Difference migration is preferred because it is faster, handles velocity variation and noise better, and events appearance is sufficiently distinctive for the interpreter to find traps, seals and reservoirs.

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Weathering structure of the east‐central Niger Delta, Nigeria

Cited by 14 publications

References 6 publications

Near-surface structural model for enhanced seismic data acquisition and processing in North-Central Niger Delta

Near-surface structural model for enhanced seismic data acquisition and processing in North-Central Niger Delta

Overpressure Prediction In The North-West Niger Delta, Using Porosity Data

Comparison of seismic processing and interpretation tradeoffs between Kirchoff and finite-difference migrations, using poststack migrated data in the west Niger Delta, Nigeria

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