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Determination of Methods for Revealing a Layer of High Viscosity Oils on the Example of Srednebotuobinskogo Oil and Gas Condensate Field
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, GeoBaikal 2018, Aug 2018, Volume 2018, p.1 - 7
Abstract
The physical properties and composition of oil within the same reservoir do not always remain constant.
Changes in the properties of oil in the deposits depend on many factors: the Genesis of reservoir fluids, reservoir depth, thermobaric regime and other factors.
The viscosity of the oil increases from the dome of the arch to the wings and to the zone of water-oil contact. To zones of water-oil contact viscosity characteristics of reservoir oil increase due to gravitational redistribution of high-molecular components of oil and dispersing them into the transition zone at the boundary of water-oil contact.
Each Deposit has its own set of causes of changes in the properties of oil in the reservoir and at the stage of research development processes they must be studied. The reasons for changes in the properties of oil on the area of the field are very diverse. Geological and structural features of the structure of the Deposit, the presence of formation exits to the surface, chemical, bacteriological, physico-chemical and other processes occurring in the reservoir, directly or indirectly affect the composition and properties of oils.
Knowing the initial distribution of oil properties on the reservoir and the dynamics of changes in the composition and properties of oil extracted from wells, it is possible, for example, to judge the directions of movement of oil in the reservoir, to establish the relationship of oil and injection wells of a multi-reservoir, to assess the productivity of individual.