Seismic Interpretation And Tectonic Characteristics Research Of Nantun Formation In Suzy Noel Area

This thesis mainly on the basis of well and seismic data, taking sequence stratigraphy,structural geology and sedimentology theory as instruction, identify favorable region forstructure and fracture sand control through fine structure interpretation, structural historyresearch and fracture sand control research.Taking sequence stratigraphy as instruction, taking the characteristics of unconformitysurface and traditional group stratification as standard, we take syntheric records as a bridgeto do fine structure interpretation of Suzy Noel oilfield. The top and bottom interface ofNantun formation are regional unconformity surface, the bottom interface of Nantunformation has obvious characteristics of onlap and truncation on seismic section. By using themethods of coherence and3d visualization, we can identify the fault and found that individualfracture changed in strike, trend and extension length. Using space-variant speed body to dotime-depth conversion, we completed the structure maps of T3, T23and T22.On the basis characteristics of fault combination in plane and profile, we studied the timeof fracture formation and divided fracture system. Research suggests that fracture formationevolution of Suzy Noel oilfield has experienced the strong stretching deformation stage fromTongBomiao formation to Nantun formation, the continuous stretching deformation stage offault depression conversion of Damoguaihe formation, the strike-slip deformation period ofYimin formation, the inversion tectonic deformation stage of some trunk basal fault ofQingYuangang formation.Taking fracture transfer zone of fault basin sand control as theoretical basis, starting fromgrowth fault recognition, predicating area of sand control and establishing sand control model,we studied distribution of sand body in depression of Nantun formation of Suzy Noel oilfield.Refer to the location of transfer zone, we predicate the distribution of transfer zone sandcontrol by using formation thickness map, sandstone thickness map, seismic attributes andinversion section. Combined with structural trap, we finally determine the favorableaccumulation area of sand body of Nantun formation.