In petroleum: searching for and obtaining petroleum within the Philippines through drilling and pressure or suction or the like, and all other operations incidental thereto. It includes the transportation, storage, handling and sale (whether for export or for domestic consumption) of petroleum so obtained but does not include any: (1) transportation of petroleum outside the Philippines; (2) processing or refining at a refinery; or (3) any transaction in the products so refined [Section 3(d), Oil Exploration and Development Act of 1972]
