Study On Fine Structural Interpretation In The Q9-111 Fault Block

This paper is based on three-dimensional seismic data and well log data,guided by structural geology and seismic exploration theory,making full use of advanced seismic interpretationtechnology to study the structural characteristic of the Q9-111 Fault Block.Using seismic data and well log data to carry out strata classification and correlation,on the basis of the preliminary geological stratification,by means of synthetic seismogram,combined with seismic section to adjust and perfect the geologic stratification of well repeatedly,to make sure the geological stratification is correct and then establish the frame section for seismic interpretation;Applying section interpretation,coherent volume interpretation and three-dimensional visualization,this paper completed the structural interpretation of research area.Based on the structural interpretation,applying various identification and interpretation technologies,we studied the lower-order faults of research area.Combined with the time-depth relationship of synthetic seismogram and seismic horizon as a means of horizontal restrain,this paper established the three-dimensional velocity model.By means of time-depth conversion,this paper drew structural maps of four horizons.On the basis of the results of structural interpretation,we studied the main fault characteristic,faults combination and structural style.Finally,based on the above research and combined with source-rock condition,features of reservoirs and cover rocks,sedimentary facies belt,local structural features and study the hydrocarbon distribution features,we know that on vertical,Es_4?1?Ng₃₃?Es_4?2?Es₃ have the best oil potentials,Es_4?3 has the second oil potentials,Es_4?1,Es_4?4,Ng₃₂ have poor oil potentials;in plane the oil mainly distributed in tow sections:between Num4 fault and Num6 fault in northern working area?Q9-X112?and structural traps formed by Qudi fault and Num3 fault in southern working area?Q9-X165?.