Dec 21 (Reuters) - Bonterra Energy Corp BNE.TO :
* OBSIDIAN ENERGY ANNOUNCES IMPORTANT AMENDMENTS TO ITS OFFER TO PURCHASE THE SHARES OF BONTERRA ENERGY CORP.
* OBSIDIAN ENERGY LTD - OFFER TO PURCHASE BONTERRA EXTENDED TO JANUARY 25, 2021
* OBSIDIAN ENERGY LTD - MINIMUM TENDER CONDITION LOWERED TO 50% OF BONTERRA ENERGY CORP.'S OUTSTANDING SHARES