Reservoir Prediction Research Of Saertu Oil Reservior In Eastern Transition Zone Of Sabei X Area

With the development of the SaBei Development Zone into the late stage of containing more water,the difficulty of the remaining recoverable reserves development has been increasing.The reservoir is described in detail and the reservoir density is low,the sand body development is relatively poor,and the recognition efficiency is not high.Therefore,it is urgent to carry out the research on the prediction of the combination of the reservoir and the reservoir to maximize the horizontal prediction ability of the seismic data and explore the adaptability of the well-seismic coupled technology to satisfy the development and adjustment requirements.Based on the seismic data and logging data,this paper describes the sedimentary microfacies and the distribution rules of the eighteen sedimentary units in the Saertu reservoir.Focusing on the study area of the target layer of fine interpretation,this paper carries out geostatistics inversion and attribute fusion research.The main subdivision is as follows:(1)Based on the idea of the consistency of the wellbore,the fine interpretation is carried out on the basis of the lithology calibration of the wellbore,and the position of the small layer is implemented to ensure the accuracy of the interpretation.(2)Based on the characteristics of different depositional characteristics of the logging curve,the multi-probability geostatistical inversion of each depositional unit in the study area is carried out to predict the distribution and connectivity of transverse and vertical sand bodies in each layer,The accuracy of the inversion results is verified by dilution.(3)To study the geologic model of the sand body in the Saertu reservoir,the sensitivity of each attribute under different sandstone characteristics is analyzed,and the attribute selection result is determined by forward modeling.(4)Research on attribute fusion based on correlation analysis and weight ratio selection,the sedimentary microfacies are described in detail based on the results of fusion seismic and logging data,and the river channel characteristics and river channel changes are studied.The results show that the study area is southwest high,northeast low and the overall upper level is gentle and no complex structure or fracture.The four reflective layers of S1,S2,S3 and P1 were identified by wellbore combined with fine horizon calibration.The inversion results have high reliability and good resolution in reservoir sand body,and the longitudinal sesolution is good.The combination of the attributes and the inversion results can be used as an effective means for drawing and sedimentary microfacies.Through the statistics of the deposition rate of each sedimentation unit,the coincidence rate of river sand can reach more than 80%,and the coincidence rate of channel sand microfacies increases more than 10%.The comprehensive understanding of sedimentary microfacies and channel changes of each sedimentary unit is completed,which provides a favorable research method for the reservoir prediction of sandstone thin interbedded reservoir.