Sand Body Prediction In Shang 2 Block Of Sanzhao Depression

The Shang 2 block,which is the study area,is located in the northeastern nose structure of Sanzhao sag in the Songliao basin.The northern part is adjacent to the Suihua sag,and the west reaches the Yulin oilfield.The Fuyang reservoir mainly consists of sedimentary delta front subfacies,subaqueous distributary channel microfacies and delta plain subfacies.The area of the study area is about 135km2,and there are more than 30 wells including exploration wells,evaluation wells and development wells.The overall development effect is good,but there are still some problems.The fracture development of the study area is more complex,the development of the sand body is changeable,the well control degree is low,the relationship of oil and gas water is complex,and the oil and water interface is not uniform.At present,with the progress of the development technology of dense oil and heavy oil,this kind of reservoir can be well developed by means of vertical well fracture network fracturing,horizontal well fracturing and steam huff and puff.Therefore,it is very important to reunderstand the exploration and development characteristics of the Shang 2 block,and it is of great significance to the further exploration of the exploration potential and the formulation of the new development scheme in the Shang 2 block.In this study,three dimensional seismic interpretation techniques were used to interpret the fault and horizon,determine its fault properties,compile the top surface structure map of the Fuyu oil layer,implement the structural traps,describe the elements of the trap,and carry out the structural period analysis.Combined with profile and plane fracture characteristics,the role of main faults in different stages and faults in oil and gas migration was analyzed.In combination with existing research results,the understanding of the source of matter was deepened.Based on the analysis of seismic attribute and seismic inversion reservoir prediction method,it is demonstrated that the reservoir prediction method suitable for this area is selected to guide reservoir prediction.From the reservoir formation to the sandstone group to the small layer,the reservoir prediction was carried out in combination with the logging facies,and the seismic facies analysis was completed.We had completed the fine interpretation of the top and bottom structure of the target layer intended for the layout of the horizontal well and the prediction of the main single sand body.The distribution characteristics of the main sand bodies were meticulous depicted to meet the requirements of horizontal well deployment.Finally,on the basis of structural and reservoir prediction,the study of oil and water relations is carried out,making clear the distribution characteristics of oil and water in the plane and the vertical,and deepening the understanding of the law of reservoir formation,providing basis for further exploration and development in the study area.