中国石油大学 / 中石油
正确率:100%
9. 5. The well that is drilled primarily for the purpose of determining that oil or gas actually exists in a subsurface rock formation is a(an) ______________________.
A、vertical well
B、production well
C、injection well
D、wildcat
A、vertical well
B、production well
C、injection well
D、wildcat
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