[1]. Adedoyin O., Eteobong E., Suleiman A., Keme B., Basak P., Amogu D. and Kachi O., “Integrated multi-disciplinary approaches to predict fluid contacts in a partially appraised field- A case study of yoko field in niger delta,” In: SPE Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2016. ##
[2]. David O., Laoye A., Odegbesan S., Isimbabi O. and Obeahon P., “Oil rim De-Risking and appraisal value of Information in a gas reservoir,” SPE Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2016. ##
[3]. John U., Ogunjobi A. and Lawoyin-Olajide N., “Data acquisition during field development: proposal for a niger delta gield,” SPE Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2016. ##
[4]. Kakayor O. G., Oragui I., Esho M. and Anyaehie J., “Fast-Tracking field development in a green field by eliminating the need for appraisal using multidisciplinary evaluation methods,” SPE Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2016. ##
[5]. Paredes J. E., Carbajal A., Izquierdo R., Loyo I., Pérez R., Perera L. M. and Larez, C. J., “Fluid contact monitoring using API tracking. A novel methodology for reservoir surveillance,” SPE Europec featured at 79th EAGE Conference and Exhibition. Society of Petroleum Engineers, 2017. ##
[6]. Danesh A., “PVT and phase behaviour of petroleum reservoir fluids,” Elsevier, 1998. ##
[7]. Lars H and Whitson C. H., “Compositional grading-theory and practice,” SPE Annual Technical Conference and Exhibition, Society of Petroleum Engineers, 2000. ##
[8]. Hoier L., “Miscibility variations in compositionally grading petroleum reservoirs,” Norwegian University of Science and Technology, 1997. ##
[9]. Fevang O., “Accurate insitu compositions in petroleum reservoirs,” European Petroleum Conference. Society of Petroleum Engineers, 1994. ##
[10]. Shukla K. and Firoozabadi A., “A new model of thermal diffusion coefficients in binary hydrocarbon mixtures,” Journal of Industrial & Engineering Chemistry Research, Vol. 37. No. 8, pp. 3331-3342, 1998. ##
[11]. Firoozabadi A., Ghorayeb K. and Shukla K., “Theoretical model of thermal diffusion factors in multicomponent mixtures,” AIChE Journal, Vol. 46. No. 5 , pp. 892-900, 2000.##
[12]. Luo S. and Barrufet M. A.,“Compositional gradient: its role in near-critical reservoir development,” Journal of Petroleum Science and Engineering, Vol 45. No. 3-4, pp. 193-201, 2004. ##
[13]. Hirschberg A., “Role of asphaltenes in compositional grading of a reservoir›s fluid column,” Journal of Petroleum Technology, Vol. 40. NO. 01, pp. 89-94, 1988. ##
[14]. Pedersen K. S. and Hjermstad H. P., “Modeling of compositional variation with depth for five North Sea reservoirs,” SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2015. ##
[15]. Ortegon L. R. D. T., Al-Shammari N. A., Al-Qattan A., Al-Samhan A., Al-Enizi N. K., Duvivier G., … and Ritchie S., “Understanding and parameterization of greater burgan fluid spatial variation using an extensive PVT data base,” SPE International Heavy Oil Conference and Exhibition. Society of Petroleum Engineers, 2018. ##
[16]. Sedaghat M. H., Daliri A. and Mohammadi H., “Improvement of whitson algorithm for chemical/gravity equilibrium calculations to compute compositional gradient in petroleum reservoirs,” Egyptian Journal of Petroleum, Vol. 22, No. 2, pp. 305-311, 2013.##
[17]. Eyitayo S. I., Lawal K. A., Ukaonu C. E., Ovuru M. I., Sanyaolu A. A., Otubanjo M. A., ... and Matemilola, S., “Using compositional-grading simulations to assess gas-oil contacts: practical cases from the niger delta,” SPE Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2017. ##
[18]. Firoozabadi A., “Thermodynamics of hydrocarbon reservoirs,” McGraw-Hill, 1999. ##
[19]. Whitson C. H. and Brulé M. R., “Phase behavior,” Richardson, TX: Henry L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers, Vol. 20, 2000. ##
[20]. Whitson C. H. and Belery P., “Compositional gradients in petroleum reservoirs,” University of Tulsa centennial petroleum engineering symposium. Society of Petroleum Engineers, 1994. ##
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