|Publisher||Society of Petroleum Engineers||Language||English|
|Content Type||Conference Paper|
|Title||Successful Implementation of First Closed Loop, Multiservice Control System for Automated Pressure Management in a Shallow Gas Well Offshore Myanmar|
Paul Fredericks and Don Reitsma, SPE, At Balance; Tom Runggai and Neil Hudson, SPE, PETRONAS; Ralf Zaeper and Oliver Backhaus, SPE, Baker Hughes INTEQ; and Maximo Hernandez, SPE, IntelliServ Inc.
IADC/SPE Drilling Conference, 4-6 March 2008, Orlando, Florida, USA
2008, IADC/SPE Drilling Conference
|1 Drilling and Completions
1.4 Drilling Equipment and Operations
From flow modeling it was estimated that within 3 minutes the system and procedures would have to detect and shut-in a gas influx, then commence circulating it out, all while controlling the BHP of a flowing, multiphase fluid within extremely narrow safe limits. It was concluded that the Nagar well could only be safely drilled with a pressure management system that could maintain BHP within +/- 15 psi while drilling and +/- 45 psi during connections and well control.
In an industry search, PETRONAS learned that no system existed with the functionality needed, but by electing to combine new and existing technologies from three separate providers they were the first to develop one that did.
This industry-first solution involved integrating elements of the technology developed for automated pressure control, pressure while drilling (PWD), and high speed, drill string telemetry. Modifications had to be made to a number of elements, including the pressure control and PWD systems, to obtain the necessary functionality. Given the safety critical nature of the drilling hazards, the modifications and system integration were first tested during simulated kicks with downhole nitrogen injection, before drilling out the casing shoe. During testing on the rig and subsequent drilling operations, the integrated system proved its ability to maintain a near constant BHP, with the accuracy and speed needed to safely and successfully drill the Nagar prospect.
|File Size||3,310 KB||18|