Hydrocarbon Reserve Estimates and Risks Assessment in ‘X’ Ray Field, Niger Delta, Nigeria.

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Adamawa State University


Hydrocarbon exploration and production is a high-risk venture. The uncertainties surrounding return on investment is taking a new dimension under the current industry condition. The dwindling nature of crude oil price requires robust assessment of the likelihood of occurrence, the range of possible outcomes, and the threat of loss throughout the life of a hydrocarbon field. Hydrocarbon prospecting in ‘X’ ray field, Niger Delta, Nigeria, revealed two gas prospects inter-bedded in thick shale sequences. Petroleum system elements were evaluated for the two prospects using a set of 3D seismic cube and well logs. Risks associating with each petroleum element were assessed. Result of study shows that the reservoir, trap, and seal are in-place and effective for hydrocarbon accumulation and production. However, organic rich rock that generated the gas accumulation was not found within the field. The absence of source rock within the field indicates high risk for the source and migration path. Average hydrocarbon saturations obtained from the prospects are 0.69, and 0.57 respectively. The estimated gas volumes of 38,620,000,000 BTU(37,892,707 scf)and 1,437,000,000 BTU (1,397,652 scf)for reservoirs 1 and 2 respectively were found to be substantial, to yield positive returns, but continuous charging of the reservoir through the life of the field is a cause for concern. It is presumed that the gas accumulation is generated by a regional source or a source located outside the field under study. To allow well-informed business decision, acquisition and analysis of more data from the neighboring field are recommended.



Reserves, Hydrocarbon prospect, Petroleum system, reservoir thickness, pay zone


Adeoye, T. O., Raji, W. O. and Ibrahim O. K. (2018). Hydrocarbon Reserve Estimates and Risks Assessment in ‘X’ Ray Field, Niger Delta, Nigeria. Adamawa State University Journal of Scientific Research, Vol. 6(1). 32 – 45. Published by faculty of Science, Adamawa State University