Case history: Relief well control of underground blowout in Bahrain
Conference
·
OSTI ID:103836
As producing wells in the Middle East mature, downhole corrosion problems are causing increased blowout risk. Well 159 was drilled in 1959 and was completed within the shallow ``Ac`` sandstone reservoir with perforations at 2,029 ft. to 2,062 ft. External casing corrosion and tubing failure lead to an underground blowout. Casings near surface had deteriorated to the point that wellbore access from surface was no longer possible to control the blowout. An estimated 8 MMscfpd gas containing 1,000 PPM H{sub 2}S and 65 CO{sub 2} was blowing into a shallow brackish water aquifer (150 ft. to 700 ft.). Well 159 wellhead vibrated at surface from subsurface flow. Gas leaked out of the aquifer into cellars of Well 159 and surrounding wells. This complicated field operations and placed offset wells at increased risk. This paper describes a case history of the relief well used to successfully control the underground blowout of Well 159.
- OSTI ID:
- 103836
- Report Number(s):
- CONF-950310--
- Country of Publication:
- United States
- Language:
- English
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