ISSN : 2488-8648
Home About IJBST For Authors Issues Useful Downloads Contact
Questions are asked and these questions need answers. This is the reason why this page is created to enable us share few worries!
×published date:2023-Oct-05
FULL TEXT in - | page 189 - 203
Abstract
Geophysical data are vital for understanding the geological structures within an area for hydrocarbon trapping potential. Well-log suites and 3D seismic data were employed to assess the subsurface structure of Pearl Field Offshore, Niger Delta Basin. The 3D seismic and well-logs were examined to map structures responsible for hydrocarbon accumulation. This involves fault interpretation and horizon interpretation. This study revealed that the field was controlled by the growth faults and rollover anticlines structures. Twelve (12) faults were identified and mapped on seismic sections across the entire field, where two (2) are major growth faults (F2 and F3), four (4) are synthetics faults (F4, F5, F6 and F7), and five are antithetic faults (F8, F9, F10, F11 and F12). Fault F2 (yellow colour) cuts through the entire mapped area. Fault F3 (green colour) trends southwest to the middle of the seismic survey. Hence, Faults F2 and F3 are predominantly the active major structure building faults (MSBF). The synthetics and antithetic were interpreted as minor faults. Reservoir sands were delineated from the well-logs using gamma-ray for the lithology identification and resistivity-logs for the fluid identification. Horizons were mapped across the seismic section. Hence, the result shows that the presence of faults is an indication that there is potential element that is responsible for hydrocarbon accumulation in the Pearl Field. The major faults block E and F were interpreted as the major structure building faults (MSBF) responsible for major structural trap at the western part of the survey. This also revealed that growth faults and rollover anticlines are the highly faulted structural elements responsible for hydrocarbon accumulation. These closures are displayed to detect potential hydrocarbon traps on the down-thrown side of fault blocks E and F.
Keywords: Structural interpretation, Seismic, Well logs, Faults, hydrocarbon accumulation
Aizebeokhai, A.P., and Olayinka, I., (2011). Structural and stratigraphic mapping of Emi field,
offshore Niger Delta. Journal of Geology and Mining Research 3 (2), 25-38.
Ajisafe, T.C., and Ako, B.D., (2013). 3-D seismic attributes for reservoir characterization of “Y”
field Niger Delta, Nigeria, IOSR Journal of Applied Geology and Geophysics 1(2) 23 – 31.
Allan, U.S., 1989. Model for hydrocarbon migration and entrapment within faulted structures
AAPG Bulletin, 73, 803–811.
Cazes, C. A. (2004). "Overlap Zones, Growth Faults, and Sedimentation: Using High Resolution
Gravity Data, Livingston Parish, LA.". Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Master of Science in The Department of Geology and Geophysics; Louisiana State University, Thesis": 147.
Dentith, M. C., & Mudge, S. T., (2014). Geophysics for the mineral exploration geoscientist,
Cambridge, United Kingdom: Cambridge University Press.
Doust, H., Omatsola, E. (1990). Divergent/passive Margin Basins. AAPG Memoir 48, Tulsa:American Association of Petroleum Geologists, 239-248.
Evamy, B.D., Haremboure, J., Kamerling, P., Molloy, F.A. and Rowlands, P. H. (1978). Hydrocarbon habitat of Tertiary Niger Delta. American Association of Petroleum Geologists Bulletin. 62:1-39.
Jadoon, I.K., Lawrence, R.D., Lillie, R.J., 1994.Seismic data, geometry, evolution and shortening in the active Sulaiman fold and thrust belt of Pakistan. American Association of Petroleum Geological Bulletin, 78, 758-774.
Knut Bjorlykke, (1989). Sedimentology and Petroleum Geology, 1st Edn. Springer-Verlag Berlin
Heidelberg ISBN: 978-3-540-17691-6.
Merki, P.I., (1972). Structural Geology of Cenozoic Niger Delta. First African Regional
Geological Conference (1970). .Proceedings. Ibadan University Press, Ibadan, Nigeria.251 –266.
Milton, N. J., and Bertram, G.T., 1992, Trap styles— A new classification based on sealing
surfaces: AAPG Bulletin, 76, 983–999.
Nton, M.E., and Esan, T.B., (2010). Sequence stratigraphy and structural analysis of the emi field,
offshore depobelt, eastern Niger delta basin, Nigeria European Journal of Scientific Research, 44 (1): 115-132.
Peters, Kenneth E., David, J., Curry, and Marek Kacewicz, (2012). An overview of basin and
petroleum system modeling: Definitions and concepts
Reijers, T. J., Petters, S. W., and Nwajide, C. S., (1997). The Niger Delta Basin. In: Selley,R.C.,
Ed, Sedimentary Basins of the world, 3. Elsevier, Amsterdam, 151-172.
Ronov, D.A., (1985). Organic carbon in sedimentary rocks. Geochemistry. 5, 510-536
Santosh, D., Aditi, B., Poonam, K., Priyanka, S., Rao, P. H., Hasan, S.Z., and Harinaravana, T.(2013). An integrated approach for faults and fractures delineation with dip and curvature attributes. 10th Biennial International Conference & Exposition, 1-7.
Stacher, P. (1995). Present Understanding of the Niger Delta Hydrocarbon Habitat, Geology of
Deltas, 57-267.
Sheriff, R.E. (1997). Seismic Resolution a Key Element. Explorer: Geophysical Corner
Waples, D.W., (1994). Maturity modelling: Thermal indicators, hydrocarbon generation, and oil cracking. American Association of Petroleum Geologists Bulletin.60, 285-306
Weber, K. J., and Daukoru, E. M., (1975). Petroleum geology of the Niger Delta, 9thWorld
Petroleum Congress Proceedings, Tokyo. 2, 209-221.
White, R and Simm, R (2003). Tutorial: Good practice in well ties. First Break. 21(5): 75-83.
Whiteman, A.J., (2012). Nigeria: Its Petroleum Geology, Resources and Potential: volume 1 and
2: London, Graham and Trotman Ltd., 176-238
Ziolkowski, A., Underhill, J.R., and Johnston, R.G.K., (1999). Wavelets, well ties, and the search for subtle stratigraphic traps. Geophysics, 63(1), 297 - 313.
FULL TEXT in - | page 189 - 203
Issue 4-Oct-Dec
Issue 3-Jul-Sep
Issue 2-Apr-Jun
Issue 1-Jan-Mar
Issue 4-Oct-Dec
Issue 3-Jul-Sep
Issue 2-Apr-Jun
Issue 1-Jan-Mar
Issue 4-Oct-Dec
Issue 3-Jul-Sep
Issue 2-Apr-Jun
Issue 1-Jan-Mar
Issue 4-Oct-Dec
Issue 2-Apr-Jun
Issue 1-Jan-Mar
Issue 4-Oct-Dec
Issue 3-Jul-Sep
Issue 4-Oct-Dec
Issue 2-Apr-Jun
Issue 1-Jan-Mar
Issue 4-Oct-Dec
Issue 3-Jul-Sep
Issue 2-Apr-Jun
Issue 4-Oct-Dec
Issue 1-Jan-Mar
Copyright © International Journal of Basic Science and Technology | Faculty of Science, Federal University Otuoke 2019. All Rights Reserved.
P.M.B. 126, Yenagoa. Bayelsa state Nigeria
Get the most recent updates
and be updated your self...