Due to the low oil recovery percent of reserves,developed barriers/interlayers,and difficult remaining oil prediction in the heavy oil reservoirs in the Panyu oilfield group,it is urgent to improve the accuracy of reservoir architecture analysis and prediction.Based on geo-logical,seismic and logging data,together with GR return rate and big data statistical technologies,the 3rd-,4th-,and 5th-order architec-ture boundaries in the reservoirs were identified,the distribution patterns of interlayers were studied,the internal structure of reservoir ar-chitecture units and the distribution of interlayers were quantitatively characterized,the main controlling factors and occurrence patterns of the remaining oil were analyzed,and the control of architecture boundary on remaining oil was clarified.The results show that the 3rd-order oblique progradational interlayers in the reservoirs can slow down vertical fluid flow,and the 4th-order superimposed horizontal interlayers can prevent vertical fluid channeling.The energy and direction of remaining oil migration are mainly constrained by the 3rd-and 4th-order interlayers and the rhythm differences.Ten ineffective and inefficient wells were sidetracked,which revealed an initial cumulative oil pro-duction of 680.00 m3/d,five times that before sidetracking.
维普
万方数据