In a 4-quart saucepan, heat oil over med-high heat. Add onion and red bell pepper. Cook, stirring for 3 mins. Stir in broth, soup and water. Cook, stirring for 2 min, until smooth and blended. Stir in chicken, beans, chiles, oregano and cumin. Haet to boiling. Reduce heat to med-low. Cook, uncovered for about 15 min, or until heated through. Top each serving w/ sour cream.