Integrated Well Services cut drilling time and costs 40% in unstable well
A producer in northeast India wanted to improve production in a deviated, underperforming well. Baker Hughes, a GE company (BHGE), used several integrated technologies to identify and resolve challenges that included mitigating well stability, inadequate weight transfer to bit, tight spots, bit balling, and a very low rate of penetration (ROP) resulting from lengthy completion times and high bit consumption.
At the time BHGE was engaged, it was taking the operator 50 to 59 days to drill 8 ½-in. to 6-in. sections. The unstable wellbore was causing issues such as extra logging trips, difficulty recording logs, and problems lowering the casing and liner.
The well had been facing declining oil recovery due to water coning as a result of ineffective oil/water zone isolation. The formations themselves were very heterogeneous with a high local dip uncertainty.
BHGE used real-time planning between its GPE and completions teams to design a prompt, effective solution for the operator. The BHGE logging while drilling (LWD) team deployed a combination of BHGE drilling services to improve borehole quality: AutoTrak™ RSS rotary steerable system, OnTrak™ resistivity, Gamma Ray imaging service, AziTrak™ deep bed boundary imaging service, and LithoTrak™ bulk density and porosity imaging service.
The AutoTrak RSS enabled weight-on-bit transfer and avoided torque and drag complications. Using a BHGE Talon highefficiency PDC drill bit considerably reduced the drill bit consumption that had been lowering ROP and driving up costs. Additional ROP improvement was provided by BHGE Performax™ drilling fluids for effective bit lubrication, clay inhibition, and coal seam stability, which saved unnecessary wiper trips.
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- Very low ROP
- Lengthy completion times
- High bit consumption
- Well production improved
- Drilling time dropped to less than half
- Saved 40% rig time and associated costs