- Home
- A-Z Publications
- First Break
- Previous Issues
- Volume 31, Issue 5, 2013
First Break - Volume 31, Issue 5, 2013
Volume 31, Issue 5, 2013
-
-
Challenging South Australia mega-survey utilizes recent acquisition technologies to complete 3D survey in a single weather window
Authors T. Manning, E. Green, G. Nicol, C. Strand, A. van der Wal and A. MostavanTed Manning, Eric Green, Gary Nicol, Christian Strand, Anthony van der Wal and Averrouz Mostavan report on the technology required to carry out a recent South Australian survey in an environmentally sensitive marine area with adverse weather and sea conditions.
-
-
-
Advanced InSAR interferometry for reservoir monitoring
Authors F. Rocca, A. Rucci, A. Ferretti and A. BohaneFabio Rocca, and Alessio Rucci, Alessandro Ferretti and Adrian Bohane show, with a case study from the InSalah project, Algeria, the benefits of a new application of surface deformation monitoring using multi-interferogram permanent scatterer techniques, an advance form of radar interferometry.
-
-
-
Time-lapse shear wave splitting analysis to monitor caprock integrity at Delhi Field, Louisiana
Authors S. O‘Brien and T. DavisSean O’Brien and Tom Davis evaluate the value of shear wave splitting analysis as a viable tool to monitor stress changes and manage the risk of undesired fracturing during enhanced recovery.
-
-
-
Mapping of fluvial sand systems using rock physics analysis and simultaneous inversion for density: case study from the Gulf of Thailand
Authors M.N. Ahmad and P. RowellTertiary rift basins in the Gulf of Thailand are major hydrocarbon-producing areas of Thailand. The reservoirs in these basins are fluvial sands. Imaging these reservoir sands is not always easy using conventional seismic amplitudes because of rapid lateral and vertical lithological variations due to the fluvial depositional environment. We applied rock physics and simultaneous inversion techniques to predict sand distribution within the Pattani Basin, Gulf of Thailand. According to rock physics analysis, P-impedance is most useful down to depths of ~1800 m, but at greater depths, density differentiates sand and shale more effectively. Vp/Vs data alone are not a good discriminator of sand bodies in the study area. However, used in conjunction with the P-impedance, they could be useful for identifying high porosity sands. Density prediction through simultaneous inversion gave a reasonable match with the sand distribution throughout the zone of interest, based on well log correlation, and at depths greater than ~1800 m resolves sands more effectively than the P-impedance volume. Horizon slices of density-inverted sections successfully delineate sand geometries associated with fluvial systems in the area.
-
-
-
Impact of low-angle subduction in petroleum systems along the Leeward Antilles island arc emergent gas trend, northern South America
Authors A. Escalona and W. YangWe performed forward basin modelling along a profile in the Leeward Antilles, southern Caribbean region, to evaluate the thermal effect that the south-dipping Caribbean slab may have on the evolution of the petroleum systems in the Cenozoic basins. The basins were formed along a former volcanic island arc and back arc region, and have been filled by terrigenous and carbonate sediments since the late Eocene. Since the middle Miocene, the region has been affected by southeastward diachronous subduction of the Caribbean plate beneath South America. We modelled the effect of the subducting slab by treating it as a cold igneous intrusion that insulates the overlying sediments from the asthenosphere. Basin modelling shows that the slab effect results in a reduced transformation ratio in the lower Palaeogene source rocks and lower temperatures in the lower Miocene reservoirs. The effects of lower temperatures and reduced maturation are more pronounced in the basins to the west than in the basins to the east, which the slab has not reached. If the transformation ratio is in the range 60–90%, as modelled, the Leeward Antilles basins offer good exploration opportunities.
-
-
-
Recovering diffractions in CRS stacked sections
Authors J.H. Faccipieri, D. Rueda Serrano, L.-J. Gelius and M. TygelThe common reflection surface (CRS) method has been proposed as an alternative to the classical common midpoint method to further improve the signal-to-noise ratio, as well as to obtain additional kinematic parameters that are useful for a number of imaging purposes. In the CRS method, reflected events are enhanced by stacking along a generalized hyperbolic moveout, referred to as the CRS moveout. However, during the process of CRS stacking, diffractions are likely to be attenuated or even suppressed. Diffracted events are important since they carry high-resolution information about the subsurface structure. By the use of a modified version of the CRS technique, diffractions can be enhanced in the same way as reflections. This paper proposes a combined approach where the CRS stack is superimposed on the CRS diffraction-enhanced stack. In this way we can recover the diffractions in CRS stacked sections. The potential of the method has been demonstrated using marine seismic data acquired offshore Brazil.
-
-
-
Single-sensor technology – the experience in Kuwait
Authors A. El-Emam, A. Al-Eidan and K. Shams Al-DeenIn early 2004, KOC conducted the first single-sensor onshore 3D seismic survey in the Gulf area because of the increasing need to image the complexity of the potential hydrocarbon traps. The motivation was also to understand the fracture and pressure regimes within multiple reservoirs, ranging from the Cretaceous down through the Jurassic to the potential new plays in the deep Permian formations. Detailed analysis of the 3D pilot study carried out over the Minagish oil field showed that the technique is capable of delivering accurate images and detailed reservoir properties. Since then, the company has acquired and processed several single-sensor 3D seismic surveys over its major oilfields and prospective areas in Kuwait. Recently, KOC designed the largest, high-resolution, full-azimuth, long-offset 3D seismic survey worldwide, which is currently being acquired with 210,000 channels in North Kuwait to achieve several challenging exploration and development objectives.
-
Volumes & issues
-
Volume 43 (2025)
-
Volume 42 (2024)
-
Volume 41 (2023)
-
Volume 40 (2022)
-
Volume 39 (2021)
-
Volume 38 (2020)
-
Volume 37 (2019)
-
Volume 36 (2018)
-
Volume 35 (2017)
-
Volume 34 (2016)
-
Volume 33 (2015)
-
Volume 32 (2014)
-
Volume 31 (2013)
-
Volume 30 (2012)
-
Volume 29 (2011)
-
Volume 28 (2010)
-
Volume 27 (2009)
-
Volume 26 (2008)
-
Volume 25 (2007)
-
Volume 24 (2006)
-
Volume 23 (2005)
-
Volume 22 (2004)
-
Volume 21 (2003)
-
Volume 20 (2002)
-
Volume 19 (2001)
-
Volume 18 (2000)
-
Volume 17 (1999)
-
Volume 16 (1998)
-
Volume 15 (1997)
-
Volume 14 (1996)
-
Volume 13 (1995)
-
Volume 12 (1994)
-
Volume 11 (1993)
-
Volume 10 (1992)
-
Volume 9 (1991)
-
Volume 8 (1990)
-
Volume 7 (1989)
-
Volume 6 (1988)
-
Volume 5 (1987)
-
Volume 4 (1986)
-
Volume 3 (1985)
-
Volume 2 (1984)
-
Volume 1 (1983)
Most Read This Month
