Multi-Sensor Contamination Monitoring

摘要

A downhole sampling tool is operated to obtain formation fluid from a subterranean formation, which then flows through a flowline of the downhole sampling tool. Real-time density and optical density sensors of the downhole sampling tool are co-located proximate the flowline. Contamination of the formation fluid in the flowline is then determined based, at least in part, on the real-time density and optical density measurements obtained utilizing the co-located sensors.

主权项

1. A method, comprising:
conveying a downhole sampling tool within a borehole extending into a subterranean formation; operating the downhole sampling tool to obtain formation fluid from the subterranean formation; flowing the obtained formation fluid through a flowline of the downhole sampling tool; obtaining real-time measurements of the formation fluid flowing through the flowline, including:
obtaining real-time density measurements via a density sensor of the downhole sampling tool; andobtaining real-time optical density measurements via a multi-channel optical sensor of the downhole sampling tool, wherein the density sensor and the multi-channel optical sensor are co-located proximate the flowline; and estimating actual contamination of the formation fluid flowing through the flowline based on the obtained real-time measurements.