Log Geological Evaluation Of Waterflooding Reservoir

In the later development stage of oilfield, log geological evaluation ofwaterflooding reservoir is a complicated issue. The thesis is focused on thethird member of dongying formation in the third block of Shengtuo oilfield.To rebuild the framework model for reservoir subdivision, correlation ofSub-layer, establishing the microfacies model, studying the mini-structure,studying the correlation of four reservoir parameters and the loging respondof waterflooded zones,Making the log processing of morewells and takemain factors evaluation of reservoir parameters. Based on these studies, thispaper takes log geological evaluation of reservoir to analyze the reservoirdistributionlawandfindoutthecontrollingfactors.Thestudyofloggeologyis an effective technological means for predicting and estimating thedistributionofremainingoil.Several achievements have been obtained as follows: First, establishingthe reservoir divided shelf model; revealingdistribution rule of sub-layer andrhythmite microfacies; clarifying reservoir mini-structure characteristics.Second, establishing logging interpretation models, reflecting the finenessand quantification of subsurface objective situation, improving reservoirparameters interpretation accuracy. Third, according to the logging responseof waterflooding zones, the technique of waterflooded zones identification are put forward, and evaluation standards of waterflooding are founded.Fouth, clarifying the spatial distribution law of reservoir parameters andrevealing the controlling factors to reservoir parameters, such as depositionmicrofacies,lithology,wellpatternsituation,faultandsoon.Fifth,proposingreservoir evaluation method with main factors quantitative, which haveincreased its precision quantitative characterization and reveals the actualreservoirgeologicalclassification. Sixth,thestudyofremainingoilcombinedwith log and geology can give a better direction in reservoir prediction,whichmayguideoilandwaterlocationandfloodpatternmodification.