Changes

This chapter presents an overview of coring tools, including guidelines for selecting coring tools for specific applications. Coring provides the only means of obtaining high quality samples for the direct measurement of rock and reservoir properties. Cores provide both geological and engineering information, and their analysis ultimately leads to a profitable field development.

This chapter presents an overview of coring tools, including guidelines for selecting coring tools for specific applications. Coring provides the only means of obtaining high quality samples for the direct measurement of rock and reservoir properties. Cores provide both geological and engineering information, and their analysis ultimately leads to a profitable field development.

Many coring systems exist. The system used depends on the objectives for the coring program and on the physical constraints of both the formation and the drilling location. A remote location might require a ready-made core-handling and preservation system such as a disposable inner barrel. An exploration program might profit by employing a wireline core barrel to core and drill alternately without the expense of tripping pipe. A mature field might need a sponge or pressure core to help pin down remaining reserves. These three situations describe three coring programs, each with different objectives and constraints and each with a different “best” way to get the job done.

Many coring systems exist. The system used depends on the objectives for the coring program and on the physical constraints of both the formation and the drilling location. A remote location might require a ready-made core-handling and preservation system such as a disposable inner barrel. An exploration program might profit by employing a wireline core barrel to core and drill alternately without the expense of [[trip]]ping pipe. A mature field might need a sponge or pressure core to help pin down remaining reserves. These three situations describe three coring programs, each with different objectives and constraints and each with a different “best” way to get the job done.

==Conventional coring systems==

==Conventional coring systems==