Heat the olive oil in a large pot over medium heat. Add the diced onion and sauté for about 5 minutes, or until the onion is translucent.
Add the minced garlic and cook for an additional minute, stirring frequently.
Add the diced chicken to the pot and cook for 5-7 minutes, until the chicken is no longer pink.
Stir in the cumin, oregano, salt, and black pepper. Mix well to coat the chicken with the spices.
Add the diced green chilies and chicken broth to the pot. Bring to a boil, then reduce the heat and let it simmer for 15 minutes.
Stir in the corn and black beans, and let the soup simmer for another 5-10 minutes, allowing the flavors to meld.
Remove the pot from heat and stir in the lime juice.
Serve the soup hot, garnished with fresh cilantro.