Pub Date : 2021-03-01DOI: 10.3997/2214-4609.202131016
I. Mostovich
Summary At the stage of geological monitoring for drilling the transport section of the well, the geosteering specialist uses LWD and Mudlogging data. Geophysical methods of gamma-ray, neutron gamma-ray, and laterolog are used for stratigraphic identification of the target formation. If the task is to stop the drilling of the transport section at a depth of half а meter from the top of the formation, then an at-bit sensor gamma-ray is required. However, this tool has a high cost and is not always used in the bottomhole assembly. So, if a constant drilling regime is observed and the angle of the bit meeting with the rock stratification plane is minimal, it is legitimate to use the value-inverted ROP (ROPIV) curve from the Mudlogging station to identify the stratigraphic reference point of the target carbonate formation.
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