Prof. Mode Ayonma Wilfred.

Department: Geology
Faculty: Physical Sciences
Designation : Professor
Phone: +2348038070489

Publications (Articles and Journals):

1. Mode A.W., Ekwenye, O.C., Oha, I.A. and  Onah, F.C. (2018). Facies analysis and ichnology of a prograding river-dominated and wave-influenced deltaic deposit:  the Nkporo Formation  in the Itigidi-Ediba region of the Afikpo Sub-basin, south-eastern Nigeria. Journal of African Earth Sciences. 10.1016/j.jafrearsci.2018.06.002- Elsevier

 2. Anyiam, A.O., Mode, A.W, Okpala, B. C., and Okeugo, C. G.2018. The use of lorenz coefficient in the reservoir heterogeneity study of a field in the Coastal Swamp, Niger Delta, Nigeria. 60(4): 560-569

3. Ofoma, A.E., Chiaghanam, O.I., Amobi, J.O., Mode, A.W. and Anichebe, G. N. 2018. Estimation of Total Organic Carbon (TOC) using Formation-Density Log: A case of the Shales of the Borno Basin, North-eastern Nigeria. Nigerian Association of Petroleum  Explorationists Bulletin. 27, 56-68.        

4. Mode, A.W., Chikezie, P. A., Ekwenye, O.C., Anyiam, A.O., and I. C. Okwara.2017. Sedimentary facies analysis and seismic interpretation of deep-water reservoirs,  ‘‘PAC’’ field, Offshore Depobelt, Niger Delta Basin.Arabian Journal of Geosciences. 10: 548. Springer

5. Mode, A. W., Anyiam, O. A. and John , S.I. 2017. Depositional environment and reservoir   quality assessment of the ‘‘Bruks Field,’’ Niger Delta. J Petrol Explor Prod Technol. DOI 10.1007/s13202-017-0346-y-Springer

6. Anyiam, A.O., Mode, A.W, and Okara, E.S. 2017. The use of cross-plots in lithology Delineation and petrophysical evaluation of some wells in the western Coastal Swamp, Niger Delta. J Petrol Explor Prod Technol DOI 10.1007/s13202-017-0364-9-Springer

7. Odumodu, C.F.R, Mode, A.W .2017. Trace Fossils from the Campanian – Maastrichtian Enugu Formation of the Anambra Basin, South-eastern Nigeria: Implications for Paleoenvironmental Interpretation. MOJ Eco Environ Sci 2(8): 00055. DOI: 10.15406/mojes.2017.02.00055 

8. Mode, A. W., Anyiam, O. A. and Anigbuogu, E. C.2016.The Effect of Diagenesis on Reservoir Quality of Mamu Sandstone, Anambra Basin, Nigeria. Journal of the Geological Society of India 87 (5), 583-590-Springer.

9. Mode, A.W., Anyiam, O. A., Amobi, J. O., and Nweke, S.U.2016.  Gas chromatographic Analysis of whole oil samples: implications for biodegradation in the Niger Delta. Journal of Petroleum Exploration and Production Technolology. DOI  10.1007/s13202-016-0287-x-Springer

10. Anyiam, O. A., Aghara, K. I., Mode, A.W. and Okene, A.2016. Hydrocarbon volume optimization using improved net-to-gross estimates through core-log calibration of the Akar field, Niger Delta. Arabian Journal of Geosciences. Arabian Journal of Geosciences 9:547 DOI 10.1007/s12517-016-2564-x_ Springer

11. Dim, C.I.P., Okwara, I.C., Mode, A.W., Onuoha, K.M. 2016. Lithofacies and environments of deposition within the Middle–Upper Cretaceous successions of Southeaster  Nigeria. Arabian Journal of Geosciences 9 (6), 1-17- Springer

12. Odumodu, C.F.R. and Mode, A.W.2016. Geothermal gradients and heat flow variations in parts of the eastern Niger Delta, Nigeria. Journal of the Geological Society of India.  88:107-118

13. Odumodu, C.F.R.and Mode, A.W. 2016. Hydrocarbon maturation modelling of Paleocene to Lower Miocene source rocks in the Niger Delta: Implications for  Hydrocarbon Generation.   Arabian Journal of Geosciences.  9 (5), 1-14

14. Ekwenye, O.C., Nichols, G., Okogbe, C. O. and Mode, A. W. 2016. Trace fossil  Assemblages in 

the tide-dominated estuarine system: Ameki Group, south-eastern Nigeria. Journal of African Earth Sciences. 118, 284-300

 15. Eze, M. O., Mode, A. W., Anyiam, A.O., 2016. Recognition and Evaluation of Low Resistivity Pay-Zones: A Case Study of “Amo-Field” in the Tertiary Niger Delta Basin, Nigeria. The Pacific Journal of Science and Technology. 17; 337-344.

16. Ezeh, S. C., Mode, A.W.,  Adejinmi, K.; and Berti M. Ozumba .2016. Ichnological   characteristics and variability of Miocene deposits in the Cenozoic Niger Delta: Examples from cores in the Coastal Swamp and Offshore depobelts. Palaeogeography, Palaeoclimatology, Palaeoecology 454:189–201.-Elsevier

17. Ezeh, S.C., Mode, A.W., Berti M. Ozumba and Yelwa, N.A. 2016. Sedimentology and ichnology of Coastal Swamp deposits in the Niger Delta Basin, Nigeria. Geologos.22(3): 191-200.

18. Mode, A. W., Anyiam, O. A. and Aghara, K. I.2015. Identification and Petrophysical Evaluation of Thinly Bedded, Low Resistivity Pay Reservoir in the Niger Delta. Arabian Journal of Geosciences.  8(4):2217–2225, DOI 10.1007/s12517-014-1348-4-Springer

19. Igwe,O., Mode, A.W., Nnebedum, O., Okonkwo, I.,Oha, I. 2015.The mechanisms and characteristics  of a rare complex rock debris and debris flow at the Nigeria-Cameroun border. Geomorphology.234:1-10

20. Mode, A. W., Ezetoha, N.O, Onuoha, K.M. and Anyiam, O. A. 2015. Prospect and Play Analysis of the 'Alpha Area', Central Swamp 1 Depobelt, Niger Delta, Nigeria. Journal of the Geological Society of India 85(3):339-347-Springer

21. Mode, A.W., Dim C.I.P, and Ozumba, B.M. 2015. Sequence stratigraphy and  depositional environments of middle - late Miocene sediments in the eastern part of the Coastal Swamp depobelt, Niger delta Basin, Nigeria. Arabian Journal of Geosciences-DOI: 10.1007/s12517-015-1798-3-Springer       

22. Ekwenye, O. C., Nichols, G. and Mode, A.W. 2015. Sedimentary petrology and provenance interpretation of the sandstone lithofacies of the Paleogene strata, South-eastern Nigeria.  Journal of African Earth Sciences.109 : 239-262-Elsevier

23. Odumodu, C.F.R.and Mode, A.W. 2014. The faunal assemblage of the Nkporo Shale at Asaga – Ohafia in southeastern Nigeria: implications for age and depositional  environments. Journal of Mining and Geology. 50: 50(2) 2014, pp. 167 - 182

24. Mode, A.W., and Odumodu, C.F.R. 2014. Lithofacies and Ichnology of the Late  Maastrichtian-DanianNsukka Formation in the Okigwe area, Anambra Basin, southeastern Nigeria. Arabian Journal of Geosciences. DOI 10.1007/s12517-014-1742-y -Springer

25. Mode, A. W., Anyiam, O. A. and Omuije, J.O..2014. Analysis of sedimentary facies and paleo-depositional environments of the DC70X reservoir in Mbakan field of the central swamp, Niger Delta. Arabian  Journal of Geosciences. DOI 10.1007/s12517-014-1690-6 -Springer

26. Dim, C.I.P, Mode, A.W., Ozumba, B.M., and Osterloff, P.I.2014. Regional Stratigraphic Configuration and structural styles: an outcome of sequence stratigraphic framework of sigma-merge blocks, eastern Coastal Swamp depo-belt, Niger Delta, Nigeria. Nigerian Association of Petroleum Explorationists Bulletin. 26, 11-25. 

27. Odumodu, C.F.R. and Mode, A.W.2014. The Paleoenvironmental Significance of Chondrites  and other Trace fossils from the Eocene Nanka Formation, South-eastern Nigeria. Journal of Mining and Geology. 50: 1-9

28. Odumodu, C.F.R. and Mode, A.W.2014. Present Day Geothermal Regime in Parts of The Eastern Niger Delta, Nigeria. Petroleum Technology Development Journal.4, 7-26

29.  Mode, A. W., Anyiam, O. A. and Egbujie, B.C.2014. The application of chromatographic  gas ratio analysis in reservior fluid evaluation of “Beta” Field in the Congo Basin. Journal of the Geological Society of India.84 (3): 303-310-Springer

30. Mode, A. W., Anyiam, O. A. and Onwuchekwa, C.N.2014. Flow Unit Characterization: Key to delineating Reservoir Performance in ''Aqua-Field'', Niger Delta, Nigeria. Journal of the Geological Society of India.84: 701-708-Springer

 31. Igwe, O., Mode, W., Nnebedum, O., Okonkwo, I., &Oha, I. (2013). The analysis of rainfall- induced slope failures at Iva Valley area of Enugu State, Nigeria. Environmental Earth Sciences, 71(5), 2465-2480. DOI 10.1007/s12665-013-2647-x-Springer

32. Mode, A. W., Anyiam, O. A. and Ngala,N.E .2013. Compaction and porosity based pore pressure prediction in the “Cappe Field”, Coastal Swamp Depobelt, Niger Delta. Global Journal of Geological Sciences. 13: 57-77

33. Mode, A.W., Amobi, J.O., and Salufu, S.O. (2013).A Model for Predicting Rate and Volume of Oil Spill in Horizontal and Vertical Pipelines. Journal of Environment and Earth Science. 3(9), 12-19

34. Mode, A.W., Adepehin, E.J, and Anyiam, A.O. 2013.Petrophysical effects of Clay Heterogeneity on  Reservoir  Properties: Case study of  “Brown Field” , Niger Delta,Nigeria. Nigerian Association of Petroleum Explorationists Bulletin. 25, 61-67

 35. Amobi, J.O., Mode, A. W., and Oha, I.A.2013. The Occurrence and Distribution of Primary And Secondary Raw Materials of Ceramics Industry in Nigeria.CPAN Journal of Ceramics Nos 4 and 5. 2013. Pp. 21-29

36. Eze, M.O, Mode, A.W., and Ugbor, C.C.2013. Formation evaluation of X7 Field in the Niger Delta: evidence from Petrophysical data. Niger Delta, Nigeria. Journal of Applied Geology and Geophysics (IOSR-JAGG). Vol.1. 1, Issue 4, PP 15-21.

37. Obi, I.S., Mode, A.W., Obi, N.M., Ekwe, A.C., Nnebedum, O.N., Ede, T.A., and Egbu, O.C.2013. Paleocurrent analysis as tool for reservoir property estimation: a case study of Eocene outcrops in Southeastern Nigeria. American Journal of Industrial and Scientific Research. Vol. 4(1), pp.137-152

 38. Jackson, C.A., Mode, A.W., Oti, M.N., Adejinmi, K, Ozumba, B, and P. Osterloff.2013. Effects of Bioturbation on reservoir Quality: An Integration in Reservoir modeling of Selected Fields in the Niger Delta Petroleum Province. Nigerian Association of Petroleum Explorationists Bulletin. 25:29-42. 

39. Obi. I.S. and Mode, A.W. 2011.Geologic controls on reservoir architecture and Heterogeneity: Example from braided river deposits in SE Nigeria. Nigerian Association of Petroleum Explorationists Bulletin. 23, 72-87.     

40. Mode, A.W., Onokwai, N.G., Onwuka, O.S., Ekwe, A.C., and Oha, I.A.2010. Integrating Geographic Information system (GIS) and Hydrochemistry for heavy metal pollution Studies: the case of Ubeji and Omadino areas of Delta state, Southern Nigeria. Journal of Mining and Geology Research.Vol.2 (7), pp183-196      

 41. Anyiam, A.O., Mode, A.W., and Ekwe, C.A. 2010. Formation evaluation of an appraisal well “KG-5”, “Green Field”, Niger Delta, Nigeria. American Journal of  Industrial and Scientific Research. Vol. 1(2), pp.262-270

 42.  Anyiam, A.O. and A.W. Mode. 2008. “Sequence Stratigraphic Framework of the “Paradise-Field” Niger Delta, Nigeria. Pacific Journal of Science and Technology.  9(1):227-237 

 43. Mode, A.W. and A.O. Anyiam. 2007. Reservoir Characterization: Implications from Petrophysical Data of the “Paradise-Field”, Niger Delta, Nigeria. Pacific Journal of Science and Technology. 8(2):194-202

44. Mode, A.W. and Amobi, J.O. 2006.Geochemistry of clays and their applications in the Ceramics industry.Ashakwu  Journal of Ceramics. 3:-85-96. 

45. Mode, A.W. 2004.Shallow transgressive sedimentation in the Nsukka Formation, Southeastern Anambra Basin, Nigeria. Nigerian Association of Petroleum Explorationists Bulletin.  17, 28-41   

46. Mode, A. W. and, Onuoha, K. M.  2001. Organic Matter Evaluation of the Nkporo Shale,  Anambra Basin, from Wireline logs.  Global Journal of Pure and  Applied Sciences. 7: 103-109.         

47. Mode, A. W. 1998.  Distribution and paleoenvironmental significance of trace fossils in the Late MaastrichtianGombe Sandstone, North-eastern Nigeria.  J. Min. Geol. 34:195 - 202.

48. Mode, A. W., 1997.  Ichnostratigraphy and paleoenvironments of the Benue Trough, Nigeria. J. Min. Geol.  33: 115 – 126.

49. Mode, A. W., 1993. Ethology and paleoenvironmental significance of trace fossils from Cenomanian - Turonian sediments in the Upper Benue Trough.  J. Min. Geol. 29: 102 – 109.

50. Mode, A. W. and N. K. Samaila., 1993.  Reconstruction of ancient sea conditions using wave formed ripple marks: an example from the Cenomanian Yolde Formation, Northeastern Nigeria. J. Min. Geol.29:  119 -124

51. Mode, A. W., 1992. Occurrences of petrified wood in the Biliri - Kaltungo LGA of Bauchi State.Nig. Field Journal, 57: 137 -147.

52. Mode, A. W., 1991.  Assemblage zones, age, and paleoenvironment of the Nkporo Shale, Akanu-Ohafia area, Imo State.  J. Min. Geol.  27: 104 – 111.


53. Egbu, O.C., Obi, G.C., Okogbue, C.O and Mode, A. W .2009. Ichnofacies and Reservoir Properties of Shoreline Deposit in the Coastal Swamp Depobelt of the Niger Delta. AAPG   Search and Discovery. Article #40412 (2009), 7pp DOI: 10.13140/2.1.2912.0968

54 .Okeke,C.O., Mode, A.W., Obi, I.S., Odokoh, A.O. 2009. Petrophysical Evaluation and Sequence  Stratigraphic Model of ‘Indigo Field’ in Greater UghelliDepobelt, Niger Delta, Nigeria. Proceedings of   the 33rd Annual SPE International Technical Conference and Exhibition (Abuja, Nigeria, August 3-5, 2009).  Article # SPE 128353, 21pp.


Dim, C.I.P., Onuoha, K.M., Mode, A.W., and Ozumba, M.B.2017. Unravelling Prospectivity at Deeper Horizons: Outcome of Hydrocarbon Lead Identification and Revalidation in the  Onshore Niger Delta Basin. In: Onuoha, K. M. (Ed.), Advances in Petroleum Geoscience Research in Nigeria.Chapter 10, pp.218-233.

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