(Reuters) Ecopetrol is planning to take on $23 billion in debt and issue $6 billion in shares to help fund its 2011-2020 expansion plan. Ecopetrol's strategic plan includes an investment of $80 billion from 2011-2020 and the $23 billion in debt and issuing $6 billion in shares or 9.9 percent of the company will form part of this investment. The remaining amount will come from its own resources. Exploration and Production activites will recieve the bulk of the investment (80%), Ecopetrol hope that this will add 6 billion barrels of oil equivalent to reserves by 2020. Investment during the first half this year has reached $1.933 billion and has mainly been utilised in infrastructure such as oil pipelines.