APPLICATION OF WEAK NATURAL RADIOACTIVITY OF THE INITIAL SUBSTANCE TO ESTIMATE THE PLACEMENT OF THE GRAVEL FILTER AND CEMENT IN THE WELLS

摘要

Disclosed are methods for conducting logging in a well using natural radioactivity, the source of which are clay-based solid particles. The methods may include using a gravel filter slurry containing fluid and gravel filter particles to hydraulically locate particles in the gravel filter zone in a wellbore passing through the subterranean formation, and obtaining a data set after packing a gravel filter by lowering a gamma radiation sensor into the wellbore. wells passing through the subterranean formation, and the detection of gamma radiation caused by the natural radioactivity of the gravel filter particles. The method further involves applying a data set after gravel pack stuffing to determine the location of gravel pack particles and correlating the position of the gravel pack particles with measuring the depth of the borehole to determine the location, height and / or percentage of the gravel pack filled with particles placed in the gravel pack zone in the well bore .