Reservoir Geological Modeling Of Chang 2 Oil-bearing Formation Of Upper Triassic In Jing'an Oilfield, Ordos Basin

Reservoir Modeling was an important technology of quantification and visualizetionin recent years, which quantitatively characterized reservoir and depicted various scales heterogeneity by building there dimensional geological model of reservoir structure, micro facies and physical properties, based on prototype geological knowledge database including all kinds of information.There are now some problems in Chang 2-the key oil-bearing formation of Zhang'qu region of Jing'an oilfield, Ordos Basin-such as the poor variation of oil water interface, the high ratio of comprehensive water-cut, the low productivity of a single well, the difficult determination of water injection limit, the larger difficulty of controlling water, the serious one-way spearhead of water injection and the stronger heterogeneity. The paper builded there dimensional reservoir geological model of Chang2 formation in Zhang'qu region according with the actual condition of research area from the perspective of fundamental geological basic problems. Meanwhile, it also constructed a there-dimension-space dataset of reservoir parameter, so that it was used as not only the base of later numerical simulation and the basis of study, but also oilfield later development deploy and further adjusting potential tapping.The paper has been constructed isochronal genetic stratigraphic framework of Chang 2 oil-bearing formation using higher resolution sequence stratigraphy, analyzed a single well core and logging facies combining with sedimentology and logging geology theory, studied on plane distribution and its evolutionary law of every thinzone-Chang2₁^3-1,Chang2₁^3-2 and Chang2₁^3-3-sedimentary micro facies, based on fluvialreservoir of Chang 2 oil-bearing formation of Yanchang formation in Zhang'qu region of Jing'an oilfield, Ordos basin. The paper has been established physical properties lower limit by secondary interpretation of logging curve according to development dynamic information, and studied inter-layer, intra-layer and plane heterogeneity and comprehensively evaluated the relationship between micro facies and reservoir physical properties by means of Grey Theory. This paper has been constructed abundant geological knowledge database of different types geological variables combining with multi subjects, on which based the author constructed there dimensional geological model of sedimentary micro facies, framework of sand body, porosity and permeability of super short-term cycles of Chang 2₁³ under the constraint of sedimentary facies according to the method of multiple information cooperative stochastic modeling by means of the software of Petrel as well as geological statistics and stochastic simulation.