Method for determining the extent of recovery of materials injected into oil wells during oil and gas exploration and production
First Claim
1. A method for 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.
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Accused Products
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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Citations
11 Claims
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1. A method for determining the extent of recovery of materials injected into a oil well comprising the steps of:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for determining the extent of recovery of materials injected into a oil well comprising the steps of:
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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, wherein the tracer is a fluorinated benzoic acid.
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Specification