| Jia and Yi Block of the western part of Xing1-3Area in Xingbei Development Area aresituated in northwest of Xingshugang Structure. The area is from Row1of Xing1Area in thenorth to Row3of Xing3Area in the south, in the east, the boundary is Fault211#ã€226#, inthe west, it’s bounded by oil boundary within Portuguese1Group. The number of faults islarge, plane extension is long, fault displacement is large, and dissection relationship betweenfaults is complex.In this paper, By taking cumulative injection pore volume times as the importantparameter of evaluating the producing condition, combined with the actual production datasof blocks, producing degree of oil reservoirs is evaluated; geological structures models andattribute models of research areas are established, laying the foundation for the stratifiedwaterflooding numerical simulation; stratified waterflooding numerical simulation of researchareas is performed, the production dynamic parameters of oil and water wells are fitted,meeting the precision requirements, and then based on results of numerical simulation,producing condition of reservoirs and remaining oil, as well as distribution situation ofremaining reserves, are analysed; using reservoir engineering and mathematical methods,combined with results of numerical simulation, quantitative criteria of waterflooding structureadjustment of Xingbei Development Area is attained, determining injection allocation waterrate of different typed wells interval; using numerical simulation to verify them, the resultsshow separate stratum injection water rate is reasonable and stratified waterfloodingadjustment effectiveness is better. These lay the foundation for making stronger operationaland better adaptable quantification technical standards of water injection structure adjustmentfor extra-high water cut period, implementing separate waterflooding on the basis of reservoirpotential, improving water injection quality and controlling decline rate of waterfloodingproduction. |
