“…Several scientific studies published recently, (e.g. Premarathne et al, 2013Premarathne et al, , 2016Ratnayake et al, 2018;Kularathne et al, 2020;Galushkin and Dubinin, 2021) contributed to gaining some insight into the petroleum system of the Mannar Basin. Due to the lack of well penetration, the major portion of the Mannar Basin remains little understood.…”