Analysis Of Structural Characteristics Of Fuyu Reservoir In Song Station-Wangjiatun Area Of Anda Depression

The Song Station-Wangjiatun area is adjacent to the Mingshui terraces and the angle-backed oblique belt in the east of the regional structure,mainly based on the anticline structure.At present,the exploration degree of Fuyu oil layer in the Song Station-Wangjiatun area is still relatively low.The area has the characteristics of fracture fragmentation,complex structure,and rapid phase transition of sedimentary strata,resulting in large changes in seismic reflection characteristics in the horizontal direction.At the same time,the influence of the T2 strong reflection interface in the research area,The lower reflection phase axis is generally weak,and the seismic resolution of the research area is generally low,which brings great difficulties to the interpretation of seismic data,especially the identification and characterization of small faults.The fault can be identified by the attributes of maximum curvature,coherent body,and stratum inclination,which is of great significance to the exploration and exploitation of oil and gas resources in Fuyu reservoir in the research area.The area is the main oil reservoir section of the four sections of the spring and the three sections of the spring.The faults in the area are very developed.There are more complex structures and the relationship between the reservoir and the fault is complex.Therefore,the area should analyze the fracture and the reservoir from the structural fracture.The relationship between,To determine the role of tectonically controlled reservoirs,the author uses seismic,well logging and other data,based on the results of many of the former's studies,to fine characterization of faults,fracture development characteristics,structural characteristics,and control of tectonically controlled reservoirs.The T2 fault controls the oily property of the Fuyu reservoir fault zone and finally determines the tectonic controlled reservoir yield model in the area.The study of the historical background of the tectonic region,the guidance of geological theory,the basis of logging data,and seismic data,and the study of the characteristics of fault development and the relationship between well seismic integration determine the structural change characteristics of the research area.The research results in the research area are compared horizontally with the wells,the waveform characteristics and the thickness of the strata are determined,and the backbone profile,the connecting well line,and the diagonal slope of the work area are compared to determine the stratigraphic comparison scheme.The interpretation of the Song Station-Wangjiatun area requires the use of continuous well profiles and the combination of well earthquakes to perform regional stratigraphic comparisons.On this basis,the stable stratigraphic fine encryption is performed,and the wave resistance characteristics are then based on the strong reflection axis T2 reflection characteristics.The coherent body analysis,the analysis of the maximum positive curvature and the minimum negative curvature,the analysis of the ant body,the horizontal slice and other techniques,and finally the fault interpretation,the establishment of the fault interpretation model,the control of the unstable stratum to achieve the closure of the stratum,the closure of the fault,The closure between fault and lamination is of great significance to the exploration and development of oil fields.The analysis results show that the four sections of Quansanquan in the Quantou Formation are generally coarse and fine positive gyroscopic lithology.Due to the lack of a spring and a spring in the West,the four strata of Quansanquan are covered layer by layer,and the strata are basically filled during the deposition period of the four sections of the spring.At this time,the thickness is larger.At this time,due to the sedimentation,the small fault tectonic zone was deeply buried,the scale of the fracture was complex,and many normal faults were developed.The structure changed the structural pattern of the research area.Due to its inherited development,it controlled the deposition of the subsequent strata.The fourth section of the spring is covered by the Nenjiang Formation of the upper stratum.The above research shows that the influence of structure on the strata,the matching relationship between structure and reservoir characteristics is the key to control the accumulation of Fuyu oil reservoir,and the treatment of complex structures using seismic interpretation.The subsidence of the strata leads to the deep burial of small depressions and the development of many positive faults.The number of faults is large,and it runs through the entire Quantou Formation.The faults have changed the previous structural pattern,and they also have inherited developmental characteristics.The characteristics of structural evolution have made it clear that the influence of the history of development on the strata has been improved in the seismic interpretation work.In summary,the Fuyu oil reservoir in the Song Station-Wangjiatun area provides guidance for exploration and development.