In 4-quart saucepan, heat oil over medium-high heat. Add onion and bell pepper. Cook 2 to 3 minutes, stirring frequently, until tender.
Stir in soup, broth and water. Cook 1 to 2 minutes, stirring frequently, until smooth and well blended. Stir in chicken, beans, chiles, oregano and cumin. Heat to boiling; reduce heat to medium-low. Cook uncovered 10 to 15 minutes, stirring occasionally, until thoroughly heated.
Top each serving with sour cream and cilantro.