Naslov
Geološka revizija i procjena preostalog plinskog potencijala na polju Marica
(Geological revision and evaluation of remaining gas potential in Marica field)

Autori
Rumora, Kristijan ; Vukadin, Domagoj ; Kovačević, Suzana ; Vidaček, Renata

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, stručni

Skup
9. MEĐUNARODNA KONFERENCIJA I IZLOŽBA O NAFTNO PLINSKOM GOSPODARSTVU I PRIMARNOJ ENERGIJI

Mjesto i datum
Šibenik, Hrvatska, 03.10.2017. - 04.10.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Marica gas field, structural model, petrophysical model, OGIP, upside potential

Sažetak
Gas production from Marica field sandstone reservoirs in the Croatian Adriatic offshore started in 2004 and recovery of almost 60% was achieved recently. At the time of reaching the mature phase of the field exploitation, the intention of development was to integrate all available geophysical, petrophysical, geological and reservoir engineering data in order to revise previous static model and OGIP assessment and to recognize and evaluate remaining upside potential of the field. In order to construct structural model, reference maps for all reservoirs with interpreted seismic amplitude anomaly boundaries were created. All other horizons in structural model were constructed as conformable to reference horizons using well tops as the main input. Petrophysical modelling has been based on old quantitative log analysis. Additional seismic acoustic impedance maps acquired from seismic inversion were used as secondary variable in porosity property population process. Facies model has been defined based on the range of effective porosity values, with 3 lithofacies classes recognized. Water saturation property was modelled respecting lithology classes and water saturation relation to height above GWC. OGIP is estimated for the volume down to the GWC depth assumed from RFT measurements and/or observed on well logs. Reduction of 1.5% in OGIP amount was realized in comparison to previous study. The difference in estimated OGIP is a result of structural reinterpretation, different petrophysical parameters distribution and in case of one reservoir deepening of GWC level. Comprehensive analysis of all hydrocarbon indications resulted in recognition and assessment of possible upside potential reservoirs. Uncertainties in case of these layers are mostly related to GWC levels, spatial extent of gas saturation, initial water saturation and discrepancy between log, seismic and mud logging gas indications. Upside potential OGIP was estimated for 5 reservoirs using deterministic approach for low, base and best case.

Izvorni jezik
Engleski

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