ชาญศิลป์ ตรีนุชกร ซีอีโอ ปตท.Published captionSome fossil-based resources are expected tobe depleted, such as gas in the Gulf of Thailand, so PTT plans to shift away from gas-based petrochemicals to crude oil under the Map Ta Phut Retrofit project, which has begun construction. Chansin TreenuchagronPresident and chief executive, PTT Plc