RIO DE JANEIRO, Feb 16 (Reuters) -
* Petroleo Brasileiro SA, or Petrobras, invested more than $20 billion in capital spending projects in 2015, Chief Executive Officer Aldemir Bendine told reporters in Santos, Brazil on Tuesday.
* Lower oil price have brought "tough times" to Petrobras, Bendine said.
* The company "knows the road" it must take to cut costs enough to produce oil and gas in deep-water fields with Brent crude oil at $30 a barrel, the company's exploration and production chief Solange Guedes said. Further company coverage: