Abstract
The objective of this research work is to examine two prominent dom gas reservoirs H1000 and H4000 in onshore Niger Delta region of Nigeria for potential production activities using seismic wavelet and well-to-seismic tie process to facilitate interpretation and evaluate dom gas (hydrocarbon) bearing formation. Well log and sidewall samples analyses show that the velocity attributes, high P-wave, S-wave and Vp/Vs ratio characterize sediments with high concentration of dom gas. The wells validated the presence of dom gas with total gas in place on the field estimated at 4.017 trillion ft3, GIIP 5,228.683 bscf, CIIP 445.136 MMstb, and STOIIP 34.647 MMstb, URg 4,120.494 bscf and URc 219.208 MMstbl, 90 % of which resides in the two reservoirs. The hydrocarbon intervals are estimated at H1000 (8864 ft, TVDSS) and H4000 (9577 ft, TVDSS). The borehole information was combined with seismic data to confirm lateral continuity of the dom gas reservoirs.
Highlights
This research work is a detailed seismic characterization of two prominent dom gas reservoirs H1000 and H4000 in onshore Niger Delta
The link between lithology and dom gas concentration by investigators from different parts of the world has been published by several authors and their investigations revealed that the formation of dom gas is strongly influenced by the lithology of the host sediments (Johnson and Max, 2006)
The real issue for commercial development of the gas is whether it concentrated where it could be economically exploited! In this regard the global estimate becomes irrelevant, but it is useful for the exploration geophysicist to know how much dom gas prospects in trillion cubic feet are available and how they could be found
Summary
This research work is a detailed seismic characterization of two prominent dom gas reservoirs H1000 and H4000 in onshore Niger Delta. Well-1 collected dom gas bearing sidewall samples, checkshot data and wireline logs.
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