Nov 22 (Reuters) - Ecopetrol SA ECO.CN
* Ecopetrol SA - Ecopetrol will invest between usd 3.5 to usd 4 billion in 2018
* Ecopetrol SA - in 2018 company expects that it will have a positive net income at Brent prices up to USD 35 per barrel
* Ecopetrol - ecopetrol Business Group's production will grow in 2018, estimated to produce between 715,000 & 725,000 barrels of petroleum-equivalent/day
* Ecopetrol SA sees its two refineries processing between 350,000 and 375,000 barrels of petroleum-equivalent per day in 2018
* Ecopetrol SA -96% planned investment in 2018 to be executed in colombia, remainder allocated to Ecopetrol Group's projects in U.S.,Mexico,Brazil,Peru
* Ecopetrol SA - 2018 investment plan will be financed with internal cash generation, & currently does not anticipate having to access financing sources