Managed pressure drilling as an effective solution for wiring wells in conditions of catastrophic absorption in fractured reservoirs.
Managed pressure drilling (MPD) implies dynamic control of equivalent static and circulating densities (ESD and ECD) depending on the actual drilling conditions and objectives, gives an undeniable advantage when the use of lost circulation materials does not bring the expected effect and adversely affects the drill-in quality of the reservoir.
The drilling of the Riphean deposits of the Yurubcheno-Tokhomsky field is closely linked with catastrophic lost circulations due to the natural fracturing of the productive reservoir and low reservoir pressures. Most of the wells were not drilled to the target depth due to complications associated with lost circulation. In addition, well flow rates often did not reach planned values.
The application of MPD technology allowed to ensure successful drilling of horizontal well intervals in the fractured reservoir of Riphean deposits and significantly increased productivity of new wells.
While pilot project of MPD technology testing in 2016, 4 wells were drilled, each of which required a completely individual approach and technological flexibility. To date, the MPD technology has proven its effectiveness and made decision to continue its application in field.
Author:
Pavel Dobrokhleb
Technical Sales Engineer
Schlumberger
In 2006 he graduated from the Gubkin Russian State University of Oil and Gas. He began his career in 2006 with M-I SWACO from the position of drilling fluids engineer.
Then he worked on various engineering and management positions on projects in Western Siberia.
From 2012 to 2016 he worked as an expert at the Petro-Technical Engineering Center of Schlumberger and supported key drilling projects on land.
Now, involved in the sales development of drilling fluids and Dynamic pressure management technology in Russia.
Member of industry conferences and author of a series of publications on drilling in complex conditions.