Measure gas-flow velocity, temperature, and pressure to determine actual and standard volumetric flow and mass flow rates.
|Well type||Vertical (Gas)|
|Hole size||12¼-in & 8½-in|
|Open Interval Length||15,026 ft (4,580 m) MD|
M-I SWACO provided Managed Pressure Drilling (MPD) services for a land based drilling project for an independent operator in Thailand. This was the first M-I SWACO MPD project in Thailand and the project presented unique challenges, including
M-I SWACO designed a fit-for–purpose package that allowed the operator to quickly respond to uncertain downhole pressure environments using proven AUTOCHOKE technology to safely control and vent any produced gas while controlling bottom hole pressure and without interrupting the drilling process.
An MPD equipment suite with the added ability to flow gas while drilling was determined as the best solution for this project.
The MPD equipment, in particular the AUTOCHOKE technology allowed the client to adjust the effective Mud Weight while drilling in response to the ever-changing downhole pressure environment. This was the most cost effective method to reduce non-productive time (NPT) throughout the drilling of the well.
It can be seen from the Drilling Curve and Reservoir Characterization graphs. The success of this operation, with regards to ROP, reduction in NPT and identifying the reservoir “sweet spots” (Reservoir Characterization).
"I am convinced that the MPD equipment provided a significant operational advantage that allowed this well, deepest in Thailand, to be drilled with fewer casing strings and minimal hole problems compared with similar wells drilled in Northeast Thailand.” —Julian Butcher, Vice-President, TATEX Thailand LLC