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

Claim 0:
1. A method for identifying a fluid flow path in a subterranean development, the method including:
delivering a first cement slurry having a first slurry marker into an annular space, the first cement slurry setting to form a first cement column 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;
delivering a second cement slurry with a second slurry marker into the annular space, the second cement slurry setting to form a second cement column 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;
perforating through the well casing and the second cement column and into the second reservoir layer and producing an initial fluids to a surface system;
measuring an initial amount of the second slurry marker and an initial amount of the first slurry marker in the initial fluids;
positioning a packer across an inner bore of the well casing, the packer preventing fluid from traveling within the inner bore past the packer;
perforating through the well casing and the first cement column and into the first reservoir layer and producing a subsequent fluids to the surface system; and
measuring 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.