After the drill started to vibrate, the first ___ that there was a problem was noticed by the crew.

• indication

• signal

• hint

• clue

We need to ___ the exact location of the oilfield on the map.

• plot

• erase

• ignore

• hide

The oil and gas industry is very ___, and companies are making large amounts of money.

• profitable

• unprofitable

• risky

• unstable

Before starting the project, we need to ___ the exact cost of the drilling operation.

• calculate

• estimate

• guess

• approximate

It’s important for us to ___ how much oil there is underground before we start drilling.

• determine

• ignore

• estimate

• assume

The ___ of the rock formation in this area is necessary to understand the potential for oil production.

• lithology

• color

• height

• temperature

To ensure everything is documented properly, we need to ___ a report at the end of every shift.

• submit

• delete

• ignore

• postpone

A mud logger collects samples of the drilling fluid, also known as ___.

• mud

• water

• oil

• sand

Mud loggers help the management know if there are any potentially dangerous issues, such as ___.

• mud

• samples

• blowouts

• diagrams

The mud logger collects samples from a mud ___ located at the surface of the borehole.

• chart

• shaker

• well

• rig