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ABSTRACT
A prevalent challenge in petroleum exploration and reservoir engineering is the limited visibility of the environment we drill through and the reservoir we drill into. We simply cannot “see” downhole from the surface. Recent enhancements to MWD tools have increased drilling efficiency with information provided by downhole Weight on Bit and Torque sensors resulting in better directional control, bit optimization, and drillstring friction analysis. Objectives of the research is to identify drilling problems associated with weight on bit and torque and discuss cases where the use of downhole torque and weight on bit from MWD measurements has improved drilling performance and minimized drilling problems. Case studies were MWD log data obtained from ARCO’s field directional wells along Alaska’s North slope, with different Bottomhole assembly (BHA) for each case. Analysis of the data showed improved quality and timeliness of decisions by optimizing the downhole Torque and Weight-on-Bit measurements.
