Monitoring scale inhibitor treatment
AssigneeSaudi Arabian Oil Company
InventorsQiwei Wang, Tao Chen, Hameed H. Al-Badairy
Life of this patent
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Abstract
A method and system of treatment with scale inhibitor, including adding scale inhibitor to source water to give injection water, conveying the injection water in a surface conduit to an injection well for injection into an oil reservoir in a subterranean formation, pumping the injection water through a wellbore of the injection well into the oil reservoir, obtaining a sample of the injection water (including suspended solids), and analyzing the suspended solids.
Claims25
A method of treatment with scale inhibitor, comprising:
- adding scale inhibitor to source water to give injection water;
- conveying the injection water in a surface conduit to an injection well for injection into an oil reservoir in a subterranean formation;
- obtaining a sample of the injection water, wherein the sample of the injection water comprises suspended solids;
- analyzing the suspended solids via energy dispersive x-ray spectroscopy (EDS), x-ray diffraction (XRD), or x-ray fluorescence (XRF), or any combinations thereof;
- and
- pumping the injection water through a wellbore of the injection well into the oil reservoir.
A method of treatment with scale inhibitor, comprising:
- adding scale inhibitor to source water to give injection water for injection via an injection well into an oil reservoir comprising crude oil;
- obtaining a sample of the injection water, wherein the sample of the injection water comprises suspended solids;
- analyzing the suspended solids via energy dispersive x-ray spectroscopy (EDS), x-ray diffraction (XRD), or x-ray fluorescence (XRF), or any combinations thereof, thereby identifying calcium carbonate solids of the suspended solids;
- and
- analyzing the calcium carbonate solids via imaging, thereby identifying at least some of the calcium carbonate solids as formed in presence of the scale inhibitor.
A method of treatment with scale inhibitor, comprising:
- adding scale inhibitor to source water to give injection water for injection via an injection well into an oil reservoir;
- conveying the injection water in a surface conduit to the injection well for injection into the oil reservoir;
- obtaining a sample of the injection water, wherein the sample of the injection water comprises suspended solids;
- analyzing the suspended solids via energy dispersive x-ray spectroscopy (EDS), thereby identifying calcium carbonate solids of the suspended solids;
- analyzing the calcium carbonate solids via scanning electron microscopy (SEM) or environmental scanning electron microscopy (ESEM), or both, thereby identifying at least some of the calcium carbonate solids as formed in presence of the scale inhibitor;
- and
- increasing an amount of the scale inhibitor added to the source water in response to identifying at least some of the calcium carbonate solids as formed in the presence of the scale inhibitor.
Dependencies are inferred from the claim text.