DOWNHOLE MULTIPLE CORE OPTICAL SENSING SYSTEM

摘要

A downhole optical sensing system can include an optical fiber positioned in the well, the optical fiber including multiple cores, and at least one well parameter being sensed in response to light being transmitted via at least one of the multiple cores in the well. The multiple cores can include a single mode core surrounded by a multiple mode core. A method of sensing at least one well parameter in a subterranean well can include transmitting light via at least one of multiple cores of an optical fiber in the well, the at least one of the multiple cores being optically coupled to a sensor in the well, and/or the at least one of the multiple cores comprising a sensor in the well, and determining the at least one well parameter based on the transmitted light.