The Research Of Reservoir Heterogeneity And Residual Oil Distribution Of Daqing Oil Field North-ⅱ-west Area

Based on the better layer wellbore information in north-â…¡-west area, author develops expansion ternary eutectic field experiment of weak alkaline system of the better layer, and explores the reasonable well network, spacing and multiple combination method, researches remaining oil distribution. In this area author proceeds trace injection test project of flooding blank testing phase and researches characteristics of remaining oil distribution in reservoir development thickness and permeability apparently less than Saertu oil layer group Pâ… , explores the method to improve recovery, by tracer injecting testing for further adjust injection system, provides reference for evaluating water flooding and ternary eutectic effect.The author analyses and studies the tracer method of numerical model test, and selects the stress concentration, the output shaft, and oil saturation and representation of geological model, the use of the tracer digital-to-analog explants software and according to the dynamic and static data establishes tracer interpretation model , explains tracer outputs curves ,and shows that flows through inversion RTD seepage parameters including the reservoir permeability, equivalent thickness and pore radius , then compares to the historical data, and analyzes to determine the correctness of. the model inversion data..Author studies the eight production tracer monitoring results, distinguishes the channel sand with the no channel sand production, and the specific to explain tracer movement speed and peak concentration, then determines the direction of the old flow, according to residual oil distribution characteristics, determines reasonable development well pattern and attention..The article calculates the inject fluid swept volume, macroscopic sweep efficiency and coal recovery of various production tracer all the Wells, makes the flow distribution ,remaining oil distribution and longitudinal distribution in each reservoir group reservoirs. Combining the fitting the numerical model, distribution of tracer streamline and description of output concentration determine remaining oil the distribution of longitudinal and lateral, proposes individual development measures of experiment region and each well group, provides scientific technology reference .for exploiting residual oil and improving recovery efficiency.