Nobre and and two co-authors reported in mid-2019 that recent work consisted of the measurement of the total and spectral gamma radiation of cutting samples from a well located at the Parque dos Gaviões Gas field, Parnaíba Basin, NE Brazil. Here, the authors performed tests in well 3-PGN-5-MA from three different acquisition times in order to evaluate the accuracy of measurements by comparing and calibrating with the total gamma ray curve acquired directly in the open hole.
If the authors can show that the measurements are consistent, an important working tool opens up, since it will be possible to have the spectral measurements of the natural radiation based on cutting samples, representing optimization especially in the initial phases of drilling, where logging is not performed in some cases, as well as promoting subsidies for paleoenvironmental discussions.
Based on their results and the evaluation of the curves, they concluded that the 60s time delivers a satisfactory result. It is possible to observe increasing and decreasing cycles of total gamma radiation which accompany the curve performed in the well. However, in other intervals there was no good correlation and this can be explained by the conditions of recovery of the cutting samples, such as their arrival time to surface and because they represent the average of a 3D sedimentary package. They searched for the best way to apply the approach and the appropriate processing. The acquired data and the method have shown to be promising but more geophysical data will be required; in addition, these curves will be fundamental mainly in intervals of the wells that were not sampled effectively during the well logging acquisition.
Managed & Built by I2M Consulting, LLC | © 2010-
