Abstract
The development of the Lower-Karmalinsky bituminous deposit is currently made by the SAGD method. However, focusing on the reduction of bitumen viscosity, the problem of mineral phase’s transformation at the reservoir due to anthropogenic impact overlooked. In this work, using thermodynamic modeling, shown that the injection of superheated steam into bitumen-saturated sandstone layer will lead to the dissolution of calcite cement.
Highlights
In recent years, in order to increase hydrocarbon reserves in the Tatarstan Republic, work is underway to optimize of bitumen deposits development [1]
The superheated water vapor injection into the bitumen deposit will drastically change the hydrogeological conditions of the reservoir, which can lead to changes of filtrationcapacity properties of sandstone at developing
According chemical analysis data of bitumen deposit groundwater’s, which planned for development, hydrocarbonate ions are predominate in them, sulphate ion and chlorite ion are in small amount
Summary
In order to increase hydrocarbon reserves in the Tatarstan Republic, work is underway to optimize of bitumen deposits development [1]. For development of the Lower-Karmalinsky bitumen deposit, steam assisted gravity drainage technology (SAGD) is being tested [3,4]. To the upper injection well is supplied water steam with a temperature of about +180°C, which heats the layer of bituminous sandstone. The formation of intensive circulation zone within a local area can lead to illuviation hydrocarbons from sand reservoirs and their mineral components. If it poorly consolidated sandstones, it can lead to problems in their development. The superheated water vapor injection into the bitumen deposit will drastically change the hydrogeological conditions of the reservoir, which can lead to changes of filtrationcapacity properties of sandstone at developing. In the proposed article, thermodynamic modeling of possible hydrochemical processes was carried out with an assessment of their effect on the bituminous reservoir being developed
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