The Study Of Identification And Evaluation Of Low Resistivity Reservoir Of Dongying LvDa 27-2 Oilfield

Compared with conventional reservoirs,low resistivity reservoirs are much stronger hidden.Long practice has proved that this type of reservoir has considerable reserves and production.However,its identification and evaluation are facing great difficulties due to complex geological origin background.This paper studied the mechanism of the genesis of low resistivity reservoir,fluid identification and evaluation method based on DY of Lv Da 27-2 oilfield.Through analysis of region’s water salinity,additional conductivity of clay minerals,mud invasion and lithology and other factors,the main cause of low resistivity in study area is lithological changes which refers to the thickness of rock particles,rock component along with physical changes.For its causes,this paper presents five effective identification method,resistivity-porosity curve correlation method,irreducible water saturation and water saturation overlap method,logging intersection diagram method,based on an integrated identification plate lithology and MDT,respectively.Meanwhile,this paper has also established effective quantitative evaluation methods.The fluid identification and quantitative evaluation methods has good applied effect in the study area.