Oil content of sediments in the sump of a salt dome solution-mined cavern used for crude oil storage. Final report [electronic resource].
- Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1981.
- Physical Description:
- Pages: 47 : digital, PDF file
- Additional Creators:
- United States. Department of Energy. Office of Scientific and Technical Information
- The studies reported herein were conducted to ascertain if petroleum hydrocarbons are likely to accumulate in the sump sediments of a salt dome solution cavern used for crude oil storage and, if so, which hydrocarbons and in what concentrations. Cavern K 117 at Etzel, West Germany was selected for sampling because considerable data were available pertaining to the cavern and its crude oil inventory as a result of earlier studies. Mineralogical analyses of the sump samples revealed that they predominantly consist of uncemented halite crystals, ranging up to several centimeters in length, with subordinate anhydrite, and traces of gypsum and clay. Some of the mineral particles are colorless and translucent, while others are noticeably contaminated with oil. The samples exuded a distinct petroleum odor. Gas chromatographic analysis of an evolved gas sample showed the presence of the normal-paraffins propane through octane. Gas chromatographic analyses of a solvent extract of the sediment showed hydrocarbon and sulfur-compound distributions typical of crude oil. An infrared spectrum of the extract was also characteristic of a weathered or topped crude oil. The hydrocarbon content of the sediment samples was determined to be 780 ppM on the basis of a tetrachloromethane extract. It is believed that the petroleum present in the sump sediments principally results from cavern workover operations involving the pulling and resetting of the brine tubing string. When the brine string is reset it fills with oil because a packer is not used. To displace this oil, river water is pumped down the tubing at a moderately high rate. During this flushing process, clay particles dispersed in the river water adsorb a film of oil. As the oil-filmed clay particles enter the brine in the cavern they electrolytically flocculate and oil is sedimented to the cavern sump.
- Published through SciTech Connect.
Giles, H.N.; Niederhoff, P.
PB-KBB, Inc., Houston, TX (USA)
KBB, Inc., Washington, DC (USA)
Kavernen Bau- und Betriebs, G.m.b.H., Hannover (Germany, F.R.)
- Funding Information:
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