Patent ID: 11946359
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. A system for identifying a fluid flow path in a subterranean development, the system including:
a first cement slurry having a first slurry marker set to form a first cement column within an annular space at an elevation of a first reservoir layer, where the annular space is defined by an outer diameter surface of a well casing and an inner diameter surface of a wellbore, where the first slurry marker is a dye selected from a group consisting of an anthraquinone dye, a diazo dye, and a combination of such dyes;
a second cement slurry with a second slurry marker set to form a second cement column within the annular space at an elevation of a second reservoir layer, where the second reservoir layer is downhole of the first reservoir layer, where the second slurry marker is a dye selected from a group consisting of an anthraquinone dye, a diazo dye, and a combination of such dyes, wherein the second slurry marker is different from the first slurry marker;
second perforations extending through the well casing and the second cement column and into the second reservoir layer, the second perforations operable to produce an initial fluids to a surface system, where the surface system is operable to measure an initial amount of a second slurry marker and an initial amount of a first slurry marker in the initial fluids;
a packer positioned across an inner bore of the well casing, the packer sealing across the inner bore of the well casing; and
first perforations extending through the well casing and the first cement column and into the first reservoir layer, the first perforations operable to produce a subsequent fluids to the surface system, where the surface system is further operable to measure a subsequent amount of the second slurry marker and a subsequent amount of the first slurry marker in the subsequent fluids,
where the first slurry marker and the second slurry marker are released into a produced fluid as the produced fluid flows through a cement column, where the produced fluid is one of the initial fluids and the subsequent fluids, and where the cement column is one of the first cement column and the second cement column.