Methods for collection and analysis of geopressured geothermal and oil field waters
Present methods are described for the collection, preservation, and chemical analysis of waters produced from geopressured geothermal and petroleum wells. Detailed procedures for collection include precautions and equipment necessary to ensure that the sample is representative of the water produced. Procedures for sample preservation include filtration, acidification, dilution for silica, methyl isobutyl ketone (MIBK) extraction of aluminum, addition of potassium permanganate to preserve mercury, and precipitation of carbonate species as strontium carbonate for stable carbon isotopes and total dissolved carbonate analysis. Characteristics determined at the well site are sulfide, pH, ammonia, and conductivity. Laboratory procedures are given for the analysis of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, iron, manganese, zinc, lead, aluminum, and mercury by atomic absorption and flame emission spectroscopy. Chloride is determined by silver nitrate titration and fluoride by ion-specific electrode. Bromide and iodide concentrations are determined by the hypochlorite oxidation method. Sulfate is analyzed by titration using barium chloride with thorin indicator after pretreatment with alumina. Boron and silica are determined colorimetrically by the carmine and molybdate-blue methods, respectively. Aliphatic acid anions (C/sub 2/ through C/sub 5/) are determined by gas chromatography after separation and concentration in a chloroform-butanol mixture.
- Research Organization:
- Geological Survey, Menlo Park, CA (USA)
- OSTI ID:
- 5407477
- Report Number(s):
- USGS-WSP-2194; ON: DE84900495
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GEOPRESSURED SYSTEMS
SAMPLING
THERMAL WATERS
CHEMICAL ANALYSIS
AMMONIA
BORON
CHLORIDES
ELECTRIC CONDUCTIVITY
FLUORIDES
LABORATORY EQUIPMENT
NATURAL GAS WELLS
OIL WELLS
PH VALUE
SILICA
SULFIDES
CHALCOGENIDES
CHLORINE COMPOUNDS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY SYSTEMS
EQUIPMENT
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
MINERALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SEMIMETALS
SILICON COMPOUNDS
SILICON OXIDES
SULFUR COMPOUNDS
WELLS
Geothermal Legacy
150302* - Geothermal Exploration & Exploration Technology- Geochemical Techniques & Surveys