Drilling Technologies Print version

Productive Reservoir Underbalanced/Balanced Drilling

Purpose
The technology is designed to preserve reservoir properties in the drilling process through the drilling mud column developing the bottomhole pressure equal to or lower than the reservoir pressure.

Areas of Application
Productive reservoirs with the formation pressure below hydrostatical pressure. Horizontal wellbores in the producing reservoir.

Application Effectiveness
Productive reservoir drilling with application of the underbalanced/balanced mode improves the mechanical penetration speed, reduces the time of wells completion operations and increases the well productivity.

Drilling of Lateral Controlled Directional and Horizontal Wells

Purpose
Sidetracking is intended to return to operation the wells from the killed well stock and increase productivity of wells making it possible to recover oil reserves from the area outside the watered bottomhole zone.

Areas of Application
Workover of the killed stock wells, watered wells and low productivity wells.

Application Effectiveness
Every year up to 50 wells are returned into the operating well stock from the category of the killed and low productivity wells stock.

Drilling of Wells with Horizontal and Horizontally Branched Wellbores

Purpose
Drilling horizontal and horizontally branched wellbores is designed to reduce capital investments into the development of oil fields.

Areas of Application
Oil fields with complicated geological structures and extra viscous oil deposits.

Application Effectiveness
Investments saving, improvement of the productivity of wells.

Construction of Small Diameter Wells (Slim Holes)

Purpose
Small diameter wells are intended to reduce construction costs through the use of mobile light-duty drilling rigs and reduce the metal content in wells construction.

Areas of Application
Wells up to 1400 m depth.

Application Effectiveness
Cost saving for the construction of wells, when replacing 146 (168) mm production strings with 114 mm ones (35%).

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