Prediction Of Reservoir Sandbody Of Fuyang Oil Layer In Shu 123 Block Of Yushulin Oil Field

The multi-stage channel sand bodies are developed during the sedimentary period of the Fuyang reservoir in the Yushu oilfield of Daqing Yushu Oilfield,which is superimposed on the narrow stripes.And the regional sedimentary facies change is fast.These complex sedimentary characteristics restrict the development of oil fields.How to carry out reservoir prediction to improve the accuracy of prediction and determine the distribution of sand bodies objectively and reasonably has always been the main problem in scientific research and production,which directly affects the exploration and development of the oil field.Based on the sedimentary facies analysis and tectonic analysis of Shu 123 block,this paper uses the seismic attribute extraction and geostatistics inversion to predict the sandbody level of Fuyang reservoir.Achieve the results and know as follows: the isochronal framework of the Fuyang oil layer in the study area was established by using the seismic and log data.There were six reservoirs in Fuyang reservoir from top to bottom,namely F?,F?,F?,Y?,Y?,Y? group and 38 small layers.Shu 123 block Fuyang oil layer exists “east high west low,north high south low” structure form.At the same time,the overall faults develop in the study area.The inner of target layer from bottom to top,fracture inheritance develops.The large faults in the fault system are dominated by north-south development,and the small-scale faults are mainly east-west.The sedimentary facies analysis of the study area realized that the source direction originated from the northeast and the study area developed the river-delta system.In the study area,the logging data were used in the wellbore area,and the results of seismic reservoir prediction were used to study the microfacies distribution in the less-well area.Finally,under the condition of sedimentary facies,the sand body with oil layer is characterized by the inversion result.It is believed that under the influence of the structure and sedimentary background,the sand bodies in the study area are mostly north-south and north-east stripes.Its distribution characteristics provide a favorable basis for finding favorable areas for oil and gas enrichment.