Integrated Heterogeneity Evaluation Of Reservoir In Liu 17 Block

Block 17 of Liu xi Oilfield is a complex low permeability reservoir, it has been developed more than 20 years. Affected by various factors, the heterogeneity of reservoir layer, the layer and the surface are serious, response wells watered out degree expanded, the proportion of low-voltage and low-yield wells is high, reservoir stable foundation is weak.On the basis of the existed research results,through the integrated application of the seismic,logging,drilling,geology analysis and test matirias,this paper re-implements the structure combining development dynamic analysis,establishes reservoir framework model.In the level the anisotropic research,we count numbers of interlayer, the interlayer frequency and total thickness and accord to the band the micro granulated substance in vivo frequency and the density to summarize the interlayer distributed characteristic。Then explain the reservoir the non-isotropic characteristic through in the different rhythm of sedimentation type graduation and the computation sand body the penetration coefficient of variation,the advance coefficient as well as the grading.During the studies of graphic heterogeneity, we can count the geometry parameters according to different sedimentary microfacies sandbody. We sum up the plane distribution characteristics of single sandbody under control of microfacies according to sandbody development situation and characteristics in different microfacies. These studies could be done by researching the drilling ratio of the sandbody, plane distribution of the isolated interbeds, petrophysical plane distribution property and so on.The study of the interlaminar heterogeneity mainly include sand density, the stratification coefficient, interlaminar permeability variation coefficient, interlaminar permeability heterogeneity coefficient and interlaminar permeability range and so on. The reservoir microscopic heterogeneity study include the size, distribution, configuration and connectivity of pore and throat, as well as the rock composition, particle arrangement, matrix content and cement type and so on, to illustrate the microfacies reservoir heterogeneity.In a comprehensive study of various macro-and micro-heterogeneous reservoir parameters on the basis of the reservoir quality, we launched a comprehensive evaluation to determine the evaluation criteria. Type I is with wide oil-bearing area and good petrophysical property, the reservoir develops continuously and development effect is good. Type III is with small oil-bearing area and development effect is poor. Type II's operty is between type I and type III.