RIASSUNTO
Bazhenov Formation (BF) is a complex study target, not only in terms of getting the flow of oil, but also in terms of studying and parameterization of its implementation on the basis of complex laboratory tests. "Standard" approaches to core studies are not applicable to the BF due to the destruction of rocks over time from exposure to air and liquids. Specialists, who analyze core material, are often encounter a lack of manufacturing capabilities of conditioned samples required for the measurement of physico-chemical and estimation parameters.
The purpose of this work is to optimize the operations with core material from source rocks on the territory of the company Gazprom Neft PJSC, which are aimed at maximum recovery of geological information while ensuring the best preservation of core material.
To address this objective it is required to perform an integrated approach for analysis of the core material at all stages - from the selection of suitable coring technologies, operations with a core "in the well" and transportation of the core to the laboratory to selection of the optimal sequence (algorithm) of the sample preparation and laboratory tests, depending on the set of commercial applications.
It is assumed that the section of the BF can be divided into a series of intervals formed by rocks, differing from each other by physico-chemical and filtration parameters. One group of intervals may be involved in the development by creating a pressure differential in the well-reservoir system, the second - by creating artificial fracture network by applying the fracturing technologies, the third will be the result of thermal effects on the rock. A list of studies was compiled on the basis of the basic assumptions of non-uniform vertical structure of the section of BF, that allows addressing a series of commercial tasks: how intervals with different properties are spread in the sections of the BF, the presence of movable hydrocarbons, filtration-capacity parameters range of intervals. To implement a list of studies, that take into account these features, "a roadmap" for research was composed, including the required handling procedure for core material.
The work shows the influence of the selection of technology, transportation, storage and sample preparation methods on the amount and quality of information obtained from geological core material of source rocks in Western Siberia.