| Yingshan rift is a composite north-south orientation basin in south-east of Songliao basinwhich is limited by the early stage foundational faults, the orientations of faults and basin aresame. Yingshan rift borders on Shuangcheng rift, it is a negative tectonic unit between thesoutheast uplift and central depression in deep Songliao basin. In this thesis, we calibrate theseismic horizon utilizing the synthetic seismogram based on the newest3D seismic data ofYingshan depression Xingshan area. By the application of Sequence Stratigraphy, Geophysics,Geotectonic Geology and Sedimentary Petrology, we can interpret the3D seismic data moreaccurate. The isochronous stratigraphic framework is established by identifying and tracingthe regional unconformity interface. We establish the3D velocity field and extract the averagevelocity of the intended interval through the application of the velocity spectrum, the velocitylogging and VSP data. Based on them, structural units and styles could be divided inXingshan area. We discuss the characteristics of the tectonic in different Evolutionary stagesand the influence about the tectonic movement effects on the reservoir forming, then topredict the beneficial hydrocarbon accumulation area.According to the shape of basement, layer structure features and distribution of fractures,etc, Xingshan area can be divided into4secondary structural units in deep-Sizhan palaeohigh,Xingshan trough, middle slope and east uplift from west to east, which is divided by faults. Inshallow the area manifests itself as syncline in west and anticline in east. The integralconstruction is controlled by types of faults, which showed extensional tectonics in early.After analysis the tectonics and faults, the are is divided into4structural stages corresponding3periods.Combined with comprehensive analysis of structure and sedimentary and petroleumgeology, we predict and point out the favorable exploration areas of Xingshan area is locatedin north area. |
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