 Baker Hughes INTEQ's RNT™ II (Reservoir Navigation Tool) tool provides real-time LWD multiple propagation resistivity measurements with deep and shallow lateral investigation of the formation. The RNT II tool is commonly integrated in the AutoTrak® and NaviGator™ drilling platforms for geosteering extended reach and horizontal wells. It also operates with a probed-based NaviTrak® MWD telemetry system.
The RNT features a dual-frequency compensated two-transmitter, two-receiver array of antennas providing four quantitative multi-depth resistivities and a total of 16 raw measurements. Two transmitting antennas operate at two distinct frequencies permitting long-and short-spaced measurements of phase difference and attenuation resistivities. The traditional 2 MHz frequency offers optimum vertical resolution for defining thin beds and detecting hydrocarbon/water contacts. For geosteering, the unique 400 kHz frequency enables extended depth of investigation into the formation for early detection of bed boundaries and greater immunity to environmental and formation effects.
Two diametrically opposed gamma ray sensors enable post drilling geo-confirmation whilst sliding of formation boundaries with reference to a toolface. A tri-axial inclinometer package also provides directional control in both rotating and sliding mode.
Service Application The RNT II service enables the evaluation of permeable zones, Rt calculation, identification of geological markers and lithology changes and the detection of oil/water and gas/water contacts (including selection of casing, coring and kick-off points). The RNT II service is available in 6 ¾" and 8 ¼" tool sizes. |
