In the following paragraph can we say
"the cost-effectiveness of drilling and finishing a well is still high/lucrative"
"the cost of drilling and finishing a well is low and profitable"?
It is understood that shale-oil companies can still produce oil because the cost of drilling and finishing a well is low and profitable. However, when it comes to exploiting a new oil well, the cost is much higher, which suggests the need for greater caution. The market should take a close eye on the income statement of every oil drilling activity in the US. Indeed, these oil companies can reduce the cost by advancing their techniques, but they cannot put significant efforts into new oil exploitation activities completely and immediately.