Analyzing, solving offshore seawater injection problems
Changes in seawater treatment, necessary cleaning of injection lines, and modifying well completion practices have reduced injection well plugging on pressure maintenance projects operated by Abu Dhabi Marine Operating Co., (Adma-Opco) in Zakum and Umm Shaif fields, offshore Abu Dhabi, in the Arabian Gulf. Plugging was caused primarily by iron sulfide and corrosion products that were displaced down hole after being formed in the water distribution system. These materials, in turn, resulted from O/sub 2/ inadvertently entering the injection system where it combined with corrosive H/sub 2/S generated by sulfate-reducing bacteria. The problem was further compounded by debris peeling from the interior of well tubulars, a high solids content of brine used to complete injectors, and slime formation in injection pipe lines. Acidizing wells proved a quick method for partially restoring injectivity, but a continuing concerted effort is being made to achieve more permanent results by eliminating the O/sub 2/ and H/sub 2/S, which are at the root of the difficulty.
- Research Organization:
- Adam-Opco, Abu Dhabi (AE)
- OSTI ID:
- 7104895
- Journal Information:
- World Oil; (United States), Vol. 206:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
42 ENGINEERING
WELL INJECTION EQUIPMENT
ACIDIFICATION
CLEANING
DESCALING
CORROSION PRODUCTS
CORROSIVE EFFECTS
DEPOSITS
DRILL PIPES
HYDRAULICS
HYDROGEN SULFIDES
IRON SULFIDES
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
OXYGEN
REMOVAL
CHALCOGENIDES
DRILLING EQUIPMENT
ELEMENTS
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLUID MECHANICS
HYDROGEN COMPOUNDS
IRON COMPOUNDS
MECHANICS
NONMETALS
PIPES
SULFIDES
SULFUR COMPOUNDS
SURFACE FINISHING
TRANSITION ELEMENT COMPOUNDS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)
423000 - Engineering- Marine Engineering- (1980-)