The X and Y commingle wells in the Langgak Field experienced a significant decrease in production, at the X well of 1150 BFPD to 859 BFPD at the Y well of 248 BFPD to 190 BFPD. To analyze the decline, a swabbing job was carried out to obtain data. After the swabbing job is done, the data obtained at well X is TOTAL LOAD 56.65 bbl, SFL 0, WFL 0, Q 1252.3 bbl/d, PI 9.3, WC 98%, Qmax 2988.471 BFPD…