Fine structural interpretation and prediction of reservoir in Xinmiaoxi area

Xinmiaoxi area is situated in the north slope of Fuxin uplift belt, south Songliao basin, where the main reservoirs are characteristic of thin and interbedded sandstone/mudstone that belong to outer frontal sedimentary facies of delta. The characters of reservoirs are rapid lateral change and minor difference of velocities between sandstone and mudstone in thin and interbedded sandstone/mud-stone, which makes prediction of reservoirs of thin and interbedded sandstone/mudstone difficult. Fully using the superiorities of various functions in interpretation workstation, starting from well site and based on horizons-calibrating results, the paper created key well-tie interpretation sections and composed them into interpretation grid in the whole area, then, 3-D fine seismic structural interpretation was implemented in combination with tests in dip angles, azimuths and fault edges and with using coherent data volume. Using analyses of attributes and sedimentary facies and reservoir-property-curves-reconstructed inversion to carry out the prediction of reservoir, it considers the reservoir-property-curves-reconstructed inversion has better effects than ordinary wave impedance inversion in describing the distribution law of reservoirs and single oil-bearing sand body.