Method for determining the extent of recovery of materials injected into oil wells during oil and gas exploration and production
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United States of America Patent
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Dec 9, 2003
Grant Date -
Jan 9, 2003
app pub date -
May 23, 2002
filing date -
May 23, 2001
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Abstract
Disclosed is a method of determining the extent of recovery of materials injected into a oil well comprising the steps of: a) preparing a material to be injected into an oil well; b) admixing therewith a chemical tracer compound at a predetermined concentration; c) injecting the admixture into an oil well; d) recovering from the oil well a production fluid; e) analyzing the production fluid for the concentration of the chemical tracer present in the production fluid; and f) calculating the amount of admixture recovered from the oil well using the concentration of the chemical tracer present in the production fluid as a basis for the calculation. Fluorinated benzoic acids are disclosed as a preferred tracer.
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