Colombian state oil firm Ecopetrol said on Monday it has purchased a wind power project in the northern province of La Guajira from Enel for $50 million.The Windpeshi project will have a capacity of 205 megawatts (MW), which will be added to Ecopetrol Group's self-consumption energy portfolio, the company said in a statement.'We have closed the transaction for around $50 million. The total development will cost about $350 million…