PARAMETER DETERMINATION OF NATURAL FRACTURING FOR CARBONATE ARTIAN DEPOSITS IN THE ORENBURGSCKOE FIELD EASTERN PART

Abstract

A significant part of the recently opened hydrocarbon fields in the world and in Russia, limited to the carbonateand fissured reservoirs.Naturally, the directions of further resource base development, oil and gas extraction technology and methodological sup-port of the geology and development in many companies associated with reservoirs of this type.While it is well known that carbonate reservoir can be very different. So if the similarity of main geological-geophysical parameters is given in the form 6GR layers may differ substantially on prevailing type capacity - pore or fracture, permeability, compressibility and other parameters that have a significant impact on key performance indicators of field development. The East part of Orenburg oil and gas field main production zone is artin deposits lying on the absolute elevations of 1500 - 1700 m. For the analysis of parameters carbonate fractured-porous collectors the East part of Orenburg oil and gas fieldartin depositsall features inherent in productive layers of this kind are characteristic - uncertainty at the description of internal structure and a flowed fluids in them; existence the stylolite seam, dense rocks, the bitumens exerting impact on the stream directions of fluids. In such conditions, besides the parameters characterizing a matrix, one of the main are the parameters describing systems: fissuries, cavities and channels, stylolities and dense rocks. Results of the specified systems analysis according to a core, interpretations of data of the electric microscanner are given in this article, the typical types of networks of fissuries characterizing them - simple geometrical schemes are defined. With use of geometrical schemes for each site oilfield, variation interval of the following parameters are estab-lished: block size, average openness of fractures, fractures porosity.