SIGNIFICANCE OF WELLBORE CLEANUP AND CHEMICAL DISPLACEMENT IN WELL COMPLETION PROCESS OF ELU-01 WELL IN NORTH-EASTERN NIGER DELTA, NIGERIA

Abstract

This research examines the significance of wellbore cleanup and chemical displacement in well completion process of Elu-01 well in North-Eastern Niger Delta, Nigeria. The aim of wellbore cleanup and chemical displacement is to prepare the well for completion following the drilling phase. Wellbore cleanup is an important component of any well development and completion processes. Failure to successfully clean the wellbore can result to challenges in running the completion tools which may lead to large amounts of non-productive time (NPT) with all the associated risks and monetary costs. Well completions are often comprised of debris sensitive equipment. Failures when running completions can be very costly both in rig time losses and equipment cost. Wellbore cleanup and chemical displacement improves operational efficiency by reducing risk and non-productive time. Wellbore cleanup mechanical tools and chemical displacement flush out debris which obstruct normal well completion operations without damaging the well structure and displaces the drilling fluid (mud oil) to completion brine. Wellbore clean up and debris removal ensures successful completion operations and increases well return fluid as well as the productivity of a well.