Reservoir Heterogeneity Of L1 Interval Of Bailian Tectonic In Beibu Gulf Basin

Reservoir heterogeneity is one of the important factors influencing the effect of water flooding,in order to guide the pilot water flooding experiment,intends to carry out the study on the Reservoir heterogeneity of L1 interval of Bailian tectonic in Beibu Gulf Basin,we studied the four characteristics and the relationship of the reservoir,established logging interpretation model of the clay porosity permeability saturation,and calculates the four parameters through the establishment of the model;discrimination chart of reservoir fluid and logging interpretation standard of reservoir are established,thus the reservoir distribution characteristics are determined;on the basis of well logging interpretation,studied the distribution of the inner layer,interlayer heterogeneity and the distribution of interlayer in the study area.The results show that the reservoir in this area is middle porosity and low permeability reservoirs;the accuracy of the discrimination chart for reservoir fluid is 80%;some interpretation results are revised,and the log interpretation results are compared with the oil test results,which shows that the coincidence rate of reservoir fluid is 89.2%;the southeast of reservoir relatively thick,the North West of reservoir relatively thin;layer heterogeneity is mainly middle to strong;positive rhythm model generally distributed in the underwater distributary channel microfaciesdifferent of different layers;compound positive rhythm accounts for a larger proportion,more common in underwater distributary channel layer;anti rhythmic patterns occurred mainly in the river mouth bar sand body and bay,ac-counted for a small;composite positiveanti rhythm and composite antipositive rhythm mainly developed in distributary channel;the heterogeneity of the 0-1 sand layer shows weak;0-2,I-3,I-4 and IV-9 sand layer show heterogeneity in the medium;II-5,II-6,III-7 and III-8 sand layer is strongly heterogeneous.the interlayer heterogeneity is mainly moderate to strong;0-1,I-3,I-4 and II-5 sand layer group heterogeneity is weak,0-2 and II-6 sand layer interlayer heterogeneity is medium,III-7,III-8 and IV-9 sand layer interlayer heterogeneity is strong;interlayer in 0-2 sand group is developed best,the interlayer thickness is 1-3 meters;the barriers developed better in the 0-2,I-4,II-5,II-6 and III-7 sand layers,the barriers thickness is more than 5 meters.Far away from the source in the direction is strong heterogeneity,the heterogeneity of close the source is weak.It is suggested that reservoirs with different heterogeneity between layers should be stratified injected.