Seismic Structure Interpretation And Reservoir Prediction

This paper focuses on seismic interpretation of structures and formations of Madong ramp zones,Zungaer basin based previous research,results show that main faults controlling regional structural shape developed in this area are east-west oriented which act as the vertical conduits for hydrocarbon transportation,secondary small fractures developed in north-east direction are induced by the main faults,four formations(P₂w₄?P₂w₃?P₂w₂?P₂w_1,respectively)developed in Permian formation in this area.Seismic facies technique,well-logging and geological data are combined to delineate detailed sedimentary facies,correlations between petrophysicl quality,sedimentary facies and Sedimentary Stage Tracts?SST?are summarized.Seismic attributes and post-stack seismic inversion techniques indicate that sediments developed in front fan-delta present high-impedance and high energy reflection.Difference in Vp/Vs and impedance values of different lithology and different fluids-containing can be recognized from Cross-plot of Vp/Vs-IMP.The Vp/Vs ratio of the High-quality reservoir is less than 1.87 with acoustic impedance larger than 8600m/sec.g/cm³,these parameters are then used for pre-stack seismic inversion for lithology and fluids containing types of the whole research area.Youngs module?E?and acoustic impedance?IMP?cross-plot?E-IMP?indicate high-quality reservoir with hydrocarbon indication correspond to E larger than 35?10⁶,non-reservoir mudstone with E value less than 20?10⁶,reservoir with E between 20?10⁶ to 35?10⁶ correspond to either dry or low productive formations,which match oil-test well data and are used for pre-stack seismic inversion for potential high-productive zones.High-E value indicate potential fracture-developing and hydrocarbon-productive zone.The E inversion results match the results of coherence technique well.Finally five potential high productive zones occupying172.3 km² in total in the whole research area were comprehensively predicted.