CNPC AktobeMunaiGas (CNPC AMG)—with
Vostokneft and Anton Oilfield Services Group—
planned to place a long horizontal section in a target
layer with an undulated reservoir cap resulting from
formation erosion. The extended lateral length and
limited rotating speed indicated a high risk of packoff.
The operator was also challenged by ineffective WOB
transfer because of potential drillstring buckling in the
curve interval. Throughout drilling, abrasive dolomite
intervals negatively impacted bit lifecycle and ROP.
CNPC sought to overcome these challenges by
mapping the reservoir and placing the well precisely,
achieving continuous WOB transfer and increasing
ROP and bit life.