Application Of Well Seismic Interpretation Technique In The Prediction Of Oil-bearing Sand Bodies In Fuyu Formation,Daqing 155 Block

Ao 155 area is the key area of exploration and evaluation,and it is necessary to obtain the capacity breakthrough,The sandstone layers in small scale,scattered oil is not continuous,so the research of this area structure,and prediction of oil-bearing sand bodies have become the focus of research in the future.Ao 155 block as the research center in this paper,the distribution of oil sand bodies in the area is predicted by the combination of well and seismic data.The design proposal of horizontal well is given by the result of reservoir prediction.In this paper,based on the structural interpretation,two sets of seismic data are collected and analyzed by means of the "four step method",based on this result,identified the optimal seismic data volume.At the same time,through the sand bodies drilled by exploration well and effective sand bodies,the best sand bodies are identified.On the basis of the data quality in the analysis area,the fine interpretation of the target layer is carried out.Firstly,the calibration of fine synthetic record is performed,and the seismic response characteristics of the main small layer are determined,preliminary analysis of the whole region to track the small layer.Then,the seismic geological layer processing is carried out,and make sure the corresponding relationship between the seismic in-phase axis and the log layering is right to ensure the rationality of horizon tracking.The fracture distribution characteristics of the Fuyu oil layer in the Ao 155 experimental area are carefully characterized by using a variety of fault enhancement techniques.Finally,the seismic horizon can be determined by using the seismic profiles of several connected wells,and the frame interpretation scheme is constructed.Finally,the full 3D structural interpretation of the test area 1*1CDP is completed;Then,using the "layer control + pseudo well" variable velocity mapping technique,the structural map of the top surface depth of the main sand body is prepared to provide guidance for the horizontal well deployment.For the spatial distribution of reservoir characteristics and accurate implementation of the first phase,analysis of seismic data,to determine the applicability of phase shift processing,followed by the well drilled sandstone thickness multi attribute intersection analysis,and select the average thickness of sandstone agreement amplitude attribute a higher rate of flow and activity of seismic attributes,predict the body the distribution of sand.Then by using qualitative geostatistical inversion based on wave impedance reconstruction and further quantitative seismic inversion based on neural network to predict the distribution of sandstone;quantitative description of each small layer sand body scale,1 integrated analysis of F?1?F?3?F?5?F?1 and F II 2 the five layer is a seismic Inversion and prediction results,combined with the structure,scope and quality of sandstone and effective sandstone thickness of seismic data,the distribution range of sand body and optimized favorable sandstone areas,provide a basis for horizontal well deployment area.