问答题 翻译：Of primary importance is the fact that the prognosis represents a firm commitment as to drilling engineers ultimate responsibility.

问答题 翻译：Proper planning of any drilling venture is the key to optimizing operations and minimizing expenditures.

问答题 翻译：Petroleum may be defined as a naturally occuring, complex mixture of hydrocarbons which may be either gas, liquid, or solid, depending on its own unique composition and the pressure and temperature at which it is confined.