Tight hole
A well which the operator wishes to keep secret, especially the geological information thereof
Time lapse technique
Techniques in which the same quantity is measured at different times in the life of an oil or gas reservoir. Normally the only change in a time-lapse measurement or survey will be due to changes in water or gas saturation. Thus, a comparison of two logs run at different times, such as a year apart, …
Toolpusher; tool pusher
Second-in-command of a drilling crew under the drilling superintendent. Responsible for the day-to-day running of the rig and for ensuring that all the necessary equipment is available
Tour
A working shift for drilling crew or other oilfield workers. Some tours are 8 hours; the three daily tours are called daylight, evening (or afternoon), and graveyard (or morning). 12-hour tours may also be used; they are called simply day tour and night tour.
Third party open access system; Third Party Access
Regulations which stipulate that infrastructure established by a company is to be made available to other suppliers including competitors at a regulated fee. This is usually the case for transmission systems
Tomography
A technique used by geophysicists to measure and display the three-dimensional distribution of velocity or reflectivity of a volume of the Earth by using numerous sources and receivers. Variations in velocity can be attributed to changes in properties of rocks. Tomographic techniques have been used to construct maps of the Earth’s interior, deep in the …
Top-down privatization (using a top-down strategy)
Structure or process that progresses from a large, basic unit to smaller, detailed subunits; a top-down description of the department’s function; selling a company as one unit including all subunits
Total depth; Driller’s total depth; Drilled to a total depth of
The bottom of a particular hole section where drilling is stopped – or the total depth to be reached in a particular well – logs are run and casing is cemented before starting the next, smaller diameter hole section
Total firm capacity (LNG)
Terminal access capacity contractually guaranteed by the terminal operator in keeping with the terminal’s technical characteristics, and the operating and integrity requirements of the facilities
Total oil and gas resource base
The total in-place resource base of crude oil and natural gas (the amount that existed prior to any production) consists of the total volume that was formed and trapped within the earth’s crust. The in-place resource is a function of the organic content of the source beds from which the hydrocarbons have been derived, the …