The Oil and Gas Industry is structured into the Upstream Sector, the Midstream Sector, Chemical Sector, and the Downstream Sector. Each of these sectors represents an operating component of the industry that performs a function independent of the others. The primary components include exploration, development, production, transportation, refining, manufacturing, distribution, and marketing.
The Upstream Sector is typically represented by the exploration, development, and production components. Through exploration and development, companies identify and evaluate prospective oil and gas fields, obtain drilling rights, contract for drilling and related services, and purchase the expendable tools, equipment, and supplies. Production involves the further evaluation of the commercial potential of wells and fields and the completion of well development.