Patent ID: 11920468
Assignee: CONOCOPHILLIPS COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A method of optimizing hydrocarbon production and minimizing produced water production; said method comprising:
a) deploying a tool comprising one or more ion sensitive sensor(s) downhole in a hydrocarbon well in a formation;
b) measuring a concentration of ions in water at a perforation or a perforation cluster in said well using said one or more ion sensitive sensor(s), said ions including Na+/Cl− and Ca2+/Cl− ratios and optionally one or more ions selected from magnesium, strontium, sulfur, iron and boron;
c) comparing said measured concentrations against known concentrations of said ions in one or more of i) natural formation water from said formation, ii) water injected into said formation, and iii) seawater above said formation if said well is an offshore well;
d) determining a contribution of one or more of i), ii) and iii) to produced water based on said comparison; and
e) applying mitigation remedies to reduce said contribution from i), ii) and/or iii), thereby optimizing hydrocarbon production and minimizing produced water production.