First Design of Inflow Control Devices Completion in Offshore Khafji Field Sandstone Reservoir: Challenges and Application
First application of Inflow Control Devices (ICDs) completion is
implemented in long openhole section with an average permeability of 3,000 mD
sandstone-reservoir in offshore Khafji field. This work illustrates the best
evaluation to design and to select the process for using ICD in long openhole
section of 1,900 ft.
The present paper discusses the challenges which faced to install the
first ICD completion focusing on reservoir/production challenges including
heel-to-toe effect, uneven drainage across horizontal section, early water
breakthrough from high-permeability intervals, water coning/fingering, sand
production and hole stability issues. The second challenge category includes
drilling fluid selection with heavyweight drilling mud due to hole stability
issues and chemical treatment process.
Cleaning of water-base mud filtercake at ICD completion by using a
treatment fluid that will attach to the mudcake to be lifted up in order to
disperse all the mud particles passing through the screen will be discussed in
this work. The treatment combines chelating agent and enzyme breaker; such
treatments ensure removal of both polymer components and CaCO3 bridging
particles in the mud filtercake as single step. Laboratory test results and
fluid preparation will be discussed in details later.
The initial well testing result showed a successful completion
deployment of ICD in a long openhole section to TD with high production rate
and zero water cut. Well production performance will be compared with offset
wells to evaluate ICD completion value in terms of reservoir and production