OPTICAL CABLE, OPTICAL CABLE MONITORING SYSTEM, AND WELL MONITORING METHOD

• Main Authors: GHAZALI, Ahmad Riza, KISHIDA, Kinzo, ABD RAHIM, Mohamad Faizal bin
• Format: Patent
• Language: English; French; German
• Published: 02.08.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MEASURING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

An optical cable includes: an optical fiber for sensing deformation of hydrocarbon absorbing resin having a property of expanding by absorbing hydrocarbon in oil; a strand provided so as to surround the outer circumference of the optical fiber; and hydrocarbon absorbing resin filling a space between the optical fiber and the strand. The optical cable configured as described above is installed along the depth direction of a well that is a measurement subject, over the entire range thereof, and a backscatter light frequency shift signal from the optical fiber is measured by a backscatter light measurement device, to detect presence/absence of leakage of oil from the well over the entire range in the depth direction of the well.