| Casing string |
The steel tubing that lines a well after it has been drilled. It is formed from sections of steel tube screwed together. |
| Catalogue |
List (index) of the data. |
| CDA |
Common Data Access Ltd. A wholly-owned subsidiary of UKOOA operated on a not-for-profit basis. The company formed to manage the UK oil industry data on a common shared basis. |
| CDA Council |
Shall mean the committee of that name formed by representatives of the Participants which Participants are also United Kingdom Continental Shelf licensees. |
| CDA Repository |
The well and seismic navigation DataStore operated currently by Landmark under contract to CDA |
| Checkshot Data |
Data obtained to calibrate sonic logs. This data can be stored in the archive database. |
| Completion Date |
The date when operations associated with a well are completed. |
| Composite Log |
A selection of well logs that are displayed together with information about lithology, drilling parameters, DST's etc. An interpreted summary of the well. |
| Composited Curve |
Any curve resulting from the combination of multiple curve segments. |
| Concurrent Users |
Users are concurrent if they are executing tasks at the same point in time. Users who are simply logged on are not concurrent users. |
| Co-Venturers |
A group of companies, including an Operator, having joint Ownership Rights to Data. |
| Curve |
A measured or computed quantity that occurs as a sequence of samples indexed against time, depth, or any other physical dimension of a wellbore. |
| Customer Support |
The nominated contact point (points) at the Prime Contractor for all routine help desk, telecomms and software enquires. |
| Cuttings |
Rock chippings cut from the formation by the drill bit, and brought to the surface with the mud. Used by geologists to obtain formation data. |
