First Successful Chemical Application Water Shut Off Job in DualCompleted Well Short Tubing and Oriented Perforations to Enhance WellProductivity in Burgan South Kuwait

摘要

Greater Burgan Field has been producing from more than 70 years and brings many challenges with thematuring field.During the last decade almost all the new wells drilled were completed as dual completions tosimultaneously produce from two different formations in Burgan.As the workover rig activity tremendouslyincreased with the increased number of new wells per year,it has been a constant endeavor to carry outmaximum well intervention jobs possibly by rig less operations to reduce rig related OPEX and wellproduction down time during rig work over.One of the biggest long term challenges was to carry out well interventions in dual completions shorttubing,which was used to be considered inaccessible due to presence of tubing long in the well bore.Inview of above,most of the intended well interventions in tubing short were normally used to be proclaimedas work over candidate thereby increasing load on limited work over rigs.First time in Burgan a dual completion well was carefully identified to carry out water shut off job bychemical application and adding perforation by oriented perforation gun in short tubing.The tubing shortwas producing from BGSU reservoir and became ceased to flow due to lateral water encroachment whichwas evident from the recent PNC log.The formation layer below BGSM was still having oil potential andwas intended to produce after shutting off the upper layer BGSU.The Tubing Long was producing fromdeeper reservoir BGSL around 1200 BLPD with 50% W/C.This paper elaborates the procedures adopted during the execution of the job and selection process of thechemical squeeze technology.The best suitable chemical technology was selected after carrying out a careful& detailed approach towards different vendors.The step by step detailed program was prepared to squeezethe chemical in to existing perforations,cleaning to the desired depth,testing the squeezed perforations andadding new perforations below with oriented perforations gun.The results were quite encouraging with sustainable oil gain of 1400 BOPD and the detailed cost/payback analysis indicated the payback period of only 1.5 days of production.This successful job has opened a new era in the history of Burgan field and many other water shut offjobs may be successfully carried out without the need of rig work over.This not only will reduce the work load on rig work overs and save rig cost significantly but will also allow to increase the well productivitywith a very short period of well down time.