METHOD OF CONSTRUCTION OF GEOLOGIC MODEL FOR OIL AND GAS DEPOSITS

摘要

FIELD: oil and gas industry.;SUBSTANCE: method includes core analysis, lithologic sectional layering, plotting of lithologic and stratigraphic columns (considering textural and structural diagnostic properties), interpretation of well survey materials, identification of the examined object and definition of correlation dependence, performance of mapping, paleoreconstruction of depositional conditions for the examined object considering ratios of natural radionuclides (thorium and uranium). At first the core is described by studying and identifying lithologic and structural features of rock porosity and permeability properties, thereafter the core is photographed in day light and ultraviolet light, profile and physical and chemical researches are performed. Then lithologic sectional layering is made with plotting of lithologic and stratigraphic columns considering textural and structural diagnostic properties. Then materials of well surveys are interpreted, analysed and obtained results are checked against identified correlation dependence, and detailed objects of study are identified. Further by mapping methods analysis is performed for identified dependences, which characterise the object of study by geologic, lithologic, petrophysical, geochemical, geophysical, structural, dynamic, tectonic and other signs of the object of study. On the basis of earlier acquired and processed data geological model of the deposit is formed using methods of facies map reconstruction for depositional conditions considering ratios of natural radionuclides (thorium and uranium); boundary of marine conditions transition to continental "sea-land" conditions for depositional conditions in the model.;EFFECT: improved efficiency, accuracy of exploration, search and reconnaissance, development and operation of oil and gas deposits.;2 cl, 1 ex, 2 dwg