Kuwait Oil Company is currently producing around 3.2 MMBOPD out of which the major share of 1.7MMBOPD is produced by South East Kuwait asset (SEK). SEK has 14 Gathering centers (GC) with an average of 100 flowing completion per GC. It has always been a challenge to test individual completion to get correct rate and other well test parameters not only to calculate the exact production potential of the GC but also to back allocate the rates to the reserves produced. Since long time the prevailing practice in SEK was to test individual wells in the GC using GC test separator and as well as testing wells by portable test units. The rates obtained from above two methods were used to be compared with the expected calculated rates based on PI calculations and other reservoir properties. The GC test is done by diverting the well manually to GC test separator which does not incur any additional cost to the company compared to portable test which done by service company hired by KOC well surveillance department with associated operational cost.
The need of portable test were justified because the old GC test facilities occasionally were giving inaccurate results and the results were used to be rejected by Field development engineers resulting in a repeat test request of portable test. This was not only taking long time to get the correct data but also add extra operational cost component to the company.
In 2014-15 it was proposed to upgrade the GC well test facilities with state of the art technology. The upgrade was completed in November15 and the GC test facilities became operationally available in Dec 15. In spite of initial difficulties and inaccuracies in the tests results the GC test units were finally accepted in Jan16 to be accurate for all the GC’s after satisfactory comparison between the portable and GC tests results.
There has been a great cost saving by the above in operating expenditure (OPEX) of SEK well surveillance. The number of portable tests has been reduced to 200 from the earlier average number of 1400 plus per year resulting a direct saving of around USD 3.6 million