Sulfur-resistant packer string

The Puguang Gas Field is currently the largest marine carbonate‑type high‑sulfur gas field discovered in China, with an average H₂S content as high as 15%. It primarily employs two types of completion strings for its 7‑inch casing: a staged acidizing–production integrated completion string and a conventional acidizing–production integrated completion string. Both configurations are capable of operating reliably under high H₂S/CO₂ conditions, with a maximum working pressure of 70 MPa and a temperature rating of 177°C.
Sulfur-resistant packer string

The Puguang Gas Field is currently the largest marine carbonate‑dominated high‑sulfur gas field discovered in China, with an average H₂S content as high as 15%. It primarily employs two types of completion strings for 7‑inch casing: a staged acidizing–production integrated completion string and a conventional acidizing–production integrated completion string. Both configurations are capable of operating reliably under high H₂S/CO₂ conditions, with a maximum working pressure of 70 MPa and a temperature rating of 177°C.

Sulfur-resistant packer string