Ruvuma 3D Seismic reminder8 May 2024 07:16
· 3d seismic improves ntorya gas field volumetrics and reveals enormous wider potential
· operator's geomodelling significantly increases ntorya giip to 3.45 tcf
· 3d seismic reveals considerable upside for mtwara licence with total unrisked giip of 16.38 tcf
aminex, the oil and gas exploration and development company focused on tanzania, is pleased to announce that the interpretation of the recently acquired 338 km2 3d seismic dataset over the ruvuma psa has improved the in-place volumetrics for the ntorya gas discovery and revealed a significantly higher resource potential in the wider licence area than previously identified on the existing sp**** 2d database.
the interpretation of the 3d seismic has been completed by the ruvuma psa operator, ara petroleum tanzania (apt). seismic inversion geomodelling, undertaken in collaboration with ikon geoscience, has defined a high confidence area with a revised in-place volumetric estimate for the ntorya gas discovery. a most-likely (approximating to p50) estimate of 3.45 trillion cubic feet (tcf) of gas initially in place (giip) is now believed to be potentially connected to the reservoir sandstones encountered in the ntorya-1 (nt-1) and ntorya-2 (nt-2) discovery wells. this revised ntorya volume represents a substantial increase to the published p50 giip of 1.64 tcf estimated by rps energy (rps) in their february 2018 competent person's report (cpr).
furthermore, the new 3d seismic images a possibly even larger area of gas charged reservoir sandstones, beyond the high confidence area established by the new seismic inversion modelling. this provides for potential additional prospective gas volumes associated with the cretaceous age sand units tested in nt-1 and nt-2 (units 1 and 2) and for the possible existence of an as yet undrilled shallower sand unit (unit 3), to be tested by the forthcoming chikumbi-1 (ch-1) appraisal well later in the year. an upside aggregated giip volume for the ntorya accumulation based on a success case in multiple stacked sands at ch-1, is estimated by apt to be up to 7.95 tcf (approximated to a mean unrisked p10 giip).
rps has been engaged to undertake a revision of their 2018 cpr to support the initial field development plan. the study is likely to focus on a much narrower area of the reservoir, surrounding the two existing wells and ch-1 location that will be targeted for initial production, with the aim of defining preliminary 1p and 2p reserve estimates. these reserve estimates are expected to increase substantially as phased development and project maturation progresses in light of the results of the newly reported apt interpretation studies.
the 3d dataset has also revealed, for the first time, considerable undrilled exploration potential within the broader licence area. multiple undrilled structural and stratigraphic plays spanning a range of geological intervals are estimated by apt to contain a total pmean unrisked giip potential of 8.43 tcf