Reservoir Log Evaluation Research Of Bioclastic Limestone Formation In Tazhong 4 Oilfield,Tarim Basin

Bioclastic limestone formation in Tazhong 4 oil field is pore carbonate reservoir,logging characteristic is obvious and regional distribution is stable.Pore carbonate reservoir has aroused more and more attention in recent years.Compared with the common fractured,pore-cave,fractured and pore-cave carbonate reservoir,pore carbonate reservoir has the characteristic of complex lithology,various types of pore and strong heterogeneity.By the reservoir logging evaluation research of bioclastic limestone formation in Tazhong 4 oil field,provided a feasible logging evaluation method and interpretation results of pore carbonate reservoir in study aera.In view of the basic geological characteristics of the study area,aiming at the pore carbonate reservoir evaluation,have conducted the study of multiple well log reservoir evaluation on the basis of core and logging data.Firstly,in combination with regional geological features,core depth correction was completed,through optimization of the standard layer and standardization method,the well logging data standardization was accomplished.Secondly,the lithology,reservoir space,physical property,oiliness characteristics were revealsed through core description,rock chips and conventional petrophysical analysis.On the basis of lithology identification,reservoir parameters log interpretation models have been established.Then according to the test data,the fluid identification method of the study area have been built.Then using several methods to determine the lower limit of the reservoir physical property,oil saturation and logging response of the study area,and quantitative interpretation criterias was established.Finally,the multi-well reservoir evaluation were accomplished.