Research On Seismic Interpretation And Structural Characteristics Of Jurassic Formation In Beier Sag Hailaer Basin

With Beier sag in Hailaer basin as the research area and Jurassic formation as the aim formation, this research works on reinterpretation of seismic section combined with well information after collecting seismic data and exploratory well data systematically. Looking for seismic reflection characteristics of the Jurassic formation and then analyzing Jurassic formation exists or not. Exploring the Jurassic formation development features and distribution range after the interfaces tracking contrast. Providing scientific basis for oil and gas basic geological survey on the new formation of Hailaer basin.By analyzing the frequency scanning profile,the edge band is mainly concentrated in the1-35 hz in deep.Using frequency division denoising methods focus on suppressing high frequency noise and retaining in the low frequency effective information. In this way, deep seismic imaging quality is significantly improved and subsequent seismic interpretation work can be proceed smoothly.On the basis of making 25 Wells synthetic seismogram, 8 backbone profiles are established. The boundaries of Jurassic formation and its seismic reflection characteristics can be determined. The top surface seismic reflection phase axis characteristics is strong continuity better reflection amplitude frequency in Beixi sub-sag Beier sag.Research suggests that the Jurassic formation exists widely in Beier sag Hailaer basin.And it is thick in Beixi sub-sag and thin in the slope belt and bump. Part of the Jurassic formation is missing.Through the analysis of the profile and flat, the tectonic framework of Beier sag is uplift and depression alternate overall. The main tectonic styles in Beier sag are Domino type tilted fault block, horst, graben, half graben, slope flat type fracture and its associated fault bend folds, fault terrace, and so on. The mainly fracture of Jurassic in the study area is normal fault.They can be divided into active faults and active faults. Generally, large fractures are the active faults, having an important control action on Jurassic sedimentary.Tectonic activities has an important controlling role for oil-gas accumulation in Beier sag in Jurassic period.