Persistent Approach to Improve Well Performance and Production Sustenance

Abstract

Abstract Sabiriyah Lower Burgan is a clastic reservoir in North Kuwait on continuous production for the last 45 years. The reservoir, on active water drive, has its inherent problem of rapid increase in water cut, the production performance of wells declining drastically after water cut level of 40%. The well production improvement is continuous effort based on understanding of well fundamentals and actual analysis of well's historical performance. This can be enhanced with Well modeling based on latest field real time parameters to predict well performance and production forecast. The persistent approach to improve well performance was implemented by dividing entire Field into segments based on water encroachment, pressure distribution and fluid properties as each well is located in a segment requiring specific approach and technique's to sustain well production and performance improvement. To implement production sustenance and enhancement plan, huge well surveillance plan was adopted to acquire TDT/PNC, PLT, FBHP and SBHP, PGOR to get latest well and field data to implement following specific actions a) Quick wins: Rig less water shut-off jobs, additional and re-perforations in dry zones to improve well production; b) Rig work overs to cement squeeze the high water cut zones to reduce water cuts and improve well vertical lift performance on natural flow; c) Selective ESP in low pressure and high water cut field segments to sustain the existing production; d) Use of latest ICD design based on PLT results to sustain well production from the existing horizontal wells with less water cut; e) Recompletion of poor performance wells of other zones after critical evaluation. The case history of Production management of this giant reservoir in North Kuwait leading to significant increase in production is a successful journey to be shared with International professional community.