Geochemistry of oil-field water from the North Slope
Knowledge of the chemical composition of oil-field water is important in understanding the origin and migration of petroleum as well as the water mineral reactions that affect the porosity and permeability of the reservoir rocks. This knowledge is essential in interpreting electric logs and in determining potential pollution, corrosion, and disposal problems of water produced with oil and gas. Finally, the chemical composition of water is an important factor in determining the conditions (temperature, pressure) for the formation of clathrates. This chapter reports detailed chemical analyses of seven formation-water samples from wells within the NPRA and one surface-and two formation-water samples from the Prudhoe Bay oil field. The authors also report {delta}D and {delta}{sup 18}O values for eight of the water samples as well as analyses for gases from six wells. The formation-water samples were obtained from depths ranging from about 700 to 2800 m and from reservoir rocks ranging in age from Mississippian (Lisburne Group) to Triassic. The reservoir rocks are sandstone except for sample 79-AK-5, which was obtained from a limestone interbedded with sandstone. Generally, the pre-Cretaceous sandstone reservoir rocks on the North Slope have a similar mineral composition. Van de Kamp (1979) gave the following description of these sandstones: Quartz (usually monocrystalline) and chert are the major components; carbonate and clay are variable. Carbonate occurs as detrital grains and as cement, siderite being the most common type. Siderite can form as much as 30 percent of the rock. Clay occurs as a common matrix, generally making up less than 10 percent of the rock. Accessory minerals include pyrite, plagioclase, microcline, glauconite, zircon, sphene, tourmaline, and muscovite.
- OSTI ID:
- 6958903
- Journal Information:
- United States Geological Survey, Professional Paper; (USA), Journal Name: United States Geological Survey, Professional Paper; (USA)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALASKA
STRATEGIC PETROLEUM RESERVE
GROUND WATER
CHEMICAL ANALYSIS
HYDROLOGY
CHEMICAL COMPOSITION
DATA ANALYSIS
DEPTH
DEUTERIUM
ELECTRIC LOGGING
ENVIRONMENTAL IMPACTS
ENVIRONMENTAL TRANSPORT
EXPLORATORY WELLS
GASES
GEOLOGIC AGES
ISOTOPE RATIO
LIMESTONE
MINERALOGY
OIL FIELDS
OXYGEN 18
PERMEABILITY
PETROLEUM
POROSITY
PRUDHOE BAY
RESERVOIR FLUIDS
RESERVOIR ROCK
SAMPLING
SANDSTONES
SURFACE WATERS
ARCTIC OCEAN
BAYS
BEAUFORT SEA
CARBONATE ROCKS
DIMENSIONS
ENERGY SOURCES
EVEN-EVEN NUCLEI
FEDERAL REGION X
FLUIDS
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MASS TRANSFER
MINERAL RESOURCES
NORTH AMERICA
NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PETROLEUM DEPOSITS
RESERVES
RESOURCES
ROCKS
SEAS
SEDIMENTARY ROCKS
STABLE ISOTOPES
USA
WATER
WELL LOGGING
WELLS
020200* - Petroleum- Reserves
Geology
& Exploration