Research On The Flow Unit Of KT-? Reservoir In North Troyes Oilfield

The main reservoir of the North Troyes oilfield,KT-? layer is the fractured carbonate reservoir of carbonate rock,has the characteristics of serious heterogeneity.The current research precision of the reservoir can not meet the actual needs of exploration and development.In this study,the reservoir flow unit is divided into the KT-? layer.The concept of flow unit is a reservoir unit that has the same continuous influence on fluid flow characteristic parameters both vertically and horizontally.This study uses the original core and logging data to select parameters that can reflect macroscopic and microscopic,sedimentary and diagenetic characteristics: permeability,porosity,D10,and FZI,RQI,and ?z parameters.The KT-? layer is divided into 4 flow unit types by Q cluster analysis.Type I flow unit is defined as the best flow unit in the study area,3?FZI,main lithology is biolimestone and dolomite.The intergranular dissolution pores are mainly developed,micro cracks are developed,and the oiliness is good.The type II flow unit: 1.3?FZI<3,the lithology is mainly dolomite,and the reservoir space type is intergranular and inner hole.The type III flow unit are low: 0.5 < FZI < 1.3.The reservoir type is micro fissure pore type,which is a poor reservoir;the type IV flow unit: FZI < 0.5,which is a dry layer with undeveloped pores.By analyzing the core and logging data to establish the interpretation model,the regression analysis and other mathematical statistics methods are used to counter the relationship between the two kinds of data,and the quantitative description parameters of the flow unit of the non coring well are obtained,which can be applied to the whole area to improve the understanding of the reservoir heterogeneity and provide support for the adjustment of the reservoir development.