There are several operation areas in Ansai, Changqing Oilfield.

Changqing Oilfield, located in Shaanxi Province, China, is one of the largest onshore oilfields in China. Among them, Ansai is one of the important operation areas in Changqing Oilfield. According to the division of Changqing Oilfield, Ansai Operation Area has jurisdiction over several oilfields and blocks, including:

1. Ansai Oilfield: Ansai Oilfield is the core oilfield in Ansai operation area and one of the parts with large output in Changqing Oilfield. There are several development blocks in this oilfield.

2. Hancheng Oilfield: located in the south of Ansai operation area, it is a large oilfield in this operation area and an important part of Changqing Oilfield production.

3. Pingqing Block: Located in the east of Ansai operation area, it is also an important block in Changqing Oilfield.

In addition, Changqing Oilfield also includes other operation areas and blocks, such as Fugu Oilfield and Hanzhong Operation Area. The geological and development conditions of each operation area and block are different, so different areas have different oilfield and oil and gas resources development activities.

It should be noted that the detailed division and development of Ansai operation area in Changqing Oilfield may change according to the actual situation. Please refer to the relevant official information or materials.