METHOD FOR CONSTRUCTION OF GEOLOGICAL-HYDRODYNAMIC MODELS OF NON-HOMOGENEOUS RESERVOIRS WITH THIN INTERLENSING OF SAND-SILT AND CLAY ROCKS

摘要

FIELD: mining.;SUBSTANCE: invention relates to geological and hydrodynamic simulation and can be used when solving tasks of searching, reconnaissance and design of oil deposits development under collectors complex structure. Essence: the core material is studied, while highlighting lithotypes of rocks and substantiating the values of their filtration-capacitive and geomechanical properties. Detailed volumetric geological model is constructed based on the stochastic pixel method of parameter distribution. Hydrodynamic model is constructed with the adaptation of reservoir parameters to the deposit development history. Multivariate calculations of predicted reservoir development indices are performed with the choice of the optimal development option. Justification of the properties of rocks and their structure is carried out both from the data of direct core analysis and interpretation of well logging materials, and from the data of the average statistical analysis of the results of the core study, with the establishment of the dependence of the rock properties on the depth of their occurrence. Geological model is a dual environment (the Kazemi model), in which the first medium is clay, and the second medium is reservoir rock. To construct a geological model, a statistical probability is determined for the distribution of lithotypes of rocks, to which characteristic values of porosity, permeability, oil saturation, compressibility, clay content in reservoir rocks and communicability (between clays and reservoir rocks) along the deposit section are assigned. For this purpose, local lithological sections are constructed on the basis of interpretation of geophysical and core research materials and the regularity between geophysical parameters and lithological composition of rocks is revealed.;EFFECT: technical result: possibility of constructing an adequate geological and hydrodynamic model.;1 cl, 2 tbl, 5 dwg