Technological features to optimize the development of oil deposits of the Baltic shelf

The article outlines the predominant of the horizontal parts of wells and the algorithm for the most effective foundations in the context of significant heterogeneity of the reservoir on the example shelf oil deposits Kravtsovskoye developed in the Baltic sea. Also in the article with the use of hydrodynamic modeling and evaluated quantitative and qualitative outcome of local system of reservoir pressure maintenance by gas injection into the reservoir
Materials and methods
Methods hydrodynamic and numerical modeling. Geological field data.
Results
Technological solutions are justified for effective exploration and development of fieldson the shelf of the Baltic sea on the basis of an integrated approach.
Сonclusions
Small deposits on the Baltic shelf oil reserves, which are developed by horizontal wells with a natural water drive, more efficient development can be achieved by the location of the horizontal sections of the wells from the centre of the deposits with improved filtration properties to the periphery, with reduced settings. The ratio of the productivity of horizontal wells in different directions in the conditions of high heterogeneity of the productive formation from the Kravtsovskoye field was about 60%. Produced gas oil offshore fields can be implemented in the formation of local system of reservoir pressure maintenance through idle wells (located in a non-Fund, control, piezometric or are on the verge of profitability of exploitation). Thus, the increased utilization of the fund, which at the moment does not exceed 10% of the wells (in Kravtsovskoye field). The gas injection can prolong theflowing well operation at the expense of local maintenance of reservoir pressure. Another important feature of gas injection is to increase the mobility of the oil by increasing the gas saturation of the reservoir (local drainage area). This provision can significantly delay or reduce watering of wells by increasing the mobility of oil relative to water, thereby it is possible to influence the characteristic of displacement.