The construction of oil wells involves the displacement of different fluids in the column and in the annular space of the well. Monitoring the position of these fluids is essential to ensure proper well performance. However, existing monitoring techniques are limited, especially for monitoring cement slurry, which is an opaque fluid.
The present invention consists of a method for tracing fluids in the column or annular space of wells during the oil well construction process. The method uses fluid tracer capsules with the same density as the fluid to be monitored and which have particles of magnetic material inside. The capsules are inserted into the fluid and their position is tracked using sensors with a magnetic field emitter and meter.
The method uses fluid tracer capsules that contain particles of magnetic material inside and have the same density as the fluid to be monitored. They are inserted into the fluid and their position is tracked using sensors that emit and measure magnetic fields. The position of the capsule is determined by the intensity of the magnetic field detected by the meter.
One use of this technology is in the cementing of oil wells. The tracer capsules are detected by sensors that are installed in the well wall. The sensors are capable of detecting low-intensity magnetic fields, which allows the capsules to be detected even if they are located at a significant distance from the well wall.
The method is particularly suitable for monitoring the position of the cement slurry, as this is an opaque fluid that is pumped into the annular space of the well during the cementing process.
Patent title:
Method for real-time tracking of fluids in the column and annular space of wells
Deposit Number:
BR 10 2021 006666 0
Pontifical Catholic University of Rio de Janeiro – PUC-Rio
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