Seismic Interpretation And Reservoir Prediction Of Saertu Formation In Northeast First Area

This paper carry out well-seismic combination structural interpretation and reservoir prediction technology research considering the dense well pattern and 3D seismic information to satisfy the geological requirements of the current actual production in the study area,namely the low accuracy of tectonic cognition and interwell sand body depiction, which deep the geological understanding in the study area. The results have been used in locating horizontal well.On structural characterization, we realized multiple well calibration consistent and unified by using seismic geologic horizon calibration technology of dense well pattern.Classify SI, SII as standard layer and SIII, PI for non-standard layer. The end face interpretations of Saertu reservoir using layered control technology of dense well pattern conditions were finished, as well as the micro amplitude structure identification through the structural trend surface analysis method, three-dimensional slicing technology. Finally, the high-precision structural maps of the top surface layers of SI, SII, SIII and PI were prepared.Based on reservoir prediction, he multi-well constrained seismic inversion and well-seismic facies diagram drawing method was formed, and effectively identified sand stone above1m(provided that shale barrier is more than 3m). Launches well-seismic combination to description sedimentary, then finely described the spatial distribution of 10 kinds sands.Interms of development and application, by use of fine structure and reservoir prediction results, get on development potential pridiction and preferably wells.Based on structual interpretation, effectively identified that the structure amplitude is over 5m, and there is 8 more micro-relief structures that closed area is over 0.25km2, then the three oil groups oil-water transition zone boundary line was re-implemented, and it moves outward 20 m compared to original boundary line. reservoir prediction shows, sand bodies in the region are well developed, the average thickness of the longitudinal sandstoneis gradually increasing, the distribution area of transverse sand body increases, reflect the development scale of the sand body from top to bottom is also growing. Description sedimentary shows,large-scale lump-like sand changes little, only individual parts appear sharp sand off, and internalme and erring with athin layer of sand appeared patchy sand, continuity of single development mean dering river channel sand get worse. In the original sand stone well area that not developed, some smaller under water distributary channel sand single sandbody were added between wells. We divided the first kind, second kind and three potential area, and determined a horizontal well location, considering the comprehensive structural interpretation and reservoir prediction results, according to the size of the sandstone thickness.