Restoring Production Naturally in a Challenging Well - Using ACTive-Q DTS, DFLO Technology & Stimulation, SA Field - North Kuwait Case

Elaila, Shamseldin Z. (KOC) | Al-Dousari, Mohamad A. (KOC) | Barki, Jassim (KOC) | Chetri, Hom B. (KOC) | Slama, Hedi (Schlumberger)

OnePetro 

Abstract

Inflow control devices techniques started to be widely used in North Kuwait filed (NK) where it delivers a valuable mean of managing production and simultaneously control the water cut and gas breakthrough. Drawbacks, such as port plugging and limited intervention options to the reservoir are also dealt with as a risk factor. In North Kuwait, some wells started to show production decline. Finding the root cause and identifying that it is related to formation damage or ICD-completion issue is necessary to define and plan for proper intervention in order to restore the productivity.

One of the key and initial confirmations required is the ICD completion’s integrity, the assurance of the ICD ports to be open and contributing to production. This can be identified by either PLT or ILT, needing multiple activities and interventions to decide for remedial actions and to design a proper well intervention. Real-time coiled tubing profiling tool is a coiled tubing conveyed tool that enables real time injection profiling that helps in real time in confirming the port status if open or plugged. Meanwhile the CT itself during the same run can be utilized for the planned treatment to stimulate or remove any asphaltene/scale deposit.

In Sabriya Field, Well-0X, a real-time coiled tubing profiling tool was utilized in ICD completion to deliver ILT profile in real time mode. Coiled tubing profiling is a powerful tool that can be run easily with CTU. It reduces the risks of using H-PLT/H-ILT in HZ wells. The tool shows a good match during the injection profile with DTS profile. The identification of the cease to flow root cause was easily identified (the quantitative injection profile across ICD compartments shows the compartments of low injection and the compartments of high injection rate). It was planned to perforate the ICD completion based on the initial findings from the previous intervention that will be resulted in losing ICD integrity and main function.

Thereafter, based on the finding, a trial of wax and asphalting treatment was pumped to enhance the well productivity before moving forward for ICD perf option. Hence, in single run, an injection profile to identify the plan and injection of treatment followed by a second injection profile to confirm status of the ports were conducted which helped to restore the well productivity thereby multiple interventions and deferred production.

Based on the results, the right corrective action was selected avoiding ICD perforation thus selecting the right decision that helped in restoring the well productivity and saving costs while maintaining ICD integrity and main function. The well was successively put back onto production with a normal flowing rate. The planned and executed job has helped to restore production with best practice. This practice and work flow have been accepted to be implemented in similar wells in future.