Gas Wells with Carbon Steel Completion, Can it Handle Sour Gas Production, Case Study

Abstract

Gas wells with Carbon steel completion, Can it handle sour Gas production, Case Study. It is a successful case of producing sour gas (up to 18% H2S and 9.2% CO2) since 2016 wells with carbon steel tubing with maintaining downhole chemical injection of corrosion inhibitor. During 2014 a group of new wells has been drilled in X giant onshore gas reservoir under ADNOC onshore company operating area to maximize gas production and to meet production mandate. Majority of wells has been drilled within the North and peripheral Area of the reservoir. All wells has been completed with a standard completion with a Top completion (+/-7000 ft.) in carbon steel with downhole chemical injection valve, and a corrosion resistant alloy section below the CIV. After wells commissioning, high H2S contents were observed (Up to 18%), and Management initially instructed operations to shut in 9 wells and formulated a task force to study the applicable options and analyze the data to ensure asset integrity. The TF recommendation was to flow the wells with close monitoring of wells integrity, in particular annulus pressure A comprehensive downhole exercise has been done by Carbon steel completion with downhole chemical injection is a validated completion solution for such conditions. Clearly, case is as a solid reference for sour gas production using conventional completion, sustaining Long-term production is adding more weight to the case conclusion.