What are the best geosteering tools for optimal wellbore placement?

1 Logging while drilling

Logging while drilling (LWD) is a type of geosteering tool that uses sensors and transmitters located near the drill bit to collect and transmit data on the formation characteristics, such as resistivity, porosity, density, and gamma ray. LWD tools can provide continuous and high-resolution measurements that can be used to identify the reservoir zones, detect faults and fractures, and monitor the wellbore position relative to the target. LWD tools can also help you avoid drilling hazards, such as pressure kicks, lost circulation, or borehole instability.

2 Measurement while drilling

Measurement while drilling (MWD) is another type of geosteering tool that uses sensors and transmitters located in the drill string to collect and transmit data on the drilling parameters, such as inclination, azimuth, toolface, and weight on bit. MWD tools can provide real-time feedback on the wellbore trajectory and performance, which can be used to adjust the steering commands and optimize the drilling efficiency. MWD tools can also communicate with LWD tools and surface equipment, creating a closed-loop system for geosteering.

3 Rotary steerable systems

Rotary steerable systems (RSS) are advanced geosteering tools that use mechanical or hydraulic devices to control the direction and inclination of the drill bit without interrupting the rotation of the drill string. RSS can provide precise and smooth wellbore trajectory control, which can improve the penetration rate, reduce the tortuosity, and enhance the wellbore quality. RSS can also integrate with LWD and MWD tools, providing real-time data and feedback for geosteering.

4 Geosteering software

Geosteering software is a type of geosteering tool that uses computer programs to process, analyze, and visualize the data from LWD, MWD, and RSS tools, as well as other sources, such as seismic, well logs, and core samples. Geosteering software can provide graphical and numerical representations of the formation structure, stratigraphy, and properties, as well as the wellbore position and trajectory. Geosteering software can also help you plan, execute, and evaluate your geosteering operations, using models, simulations, and optimization algorithms.

5 Near-bit sensors

Near-bit sensors are a type of geosteering tool that use sensors located very close to the drill bit to collect and transmit data on the formation characteristics and boundaries. Near-bit sensors can provide more accurate and timely measurements than conventional LWD tools, which are located several meters behind the drill bit. Near-bit sensors can help you detect and react to changes in the formation ahead of the drill bit, which can improve your geosteering accuracy and efficiency.

6 Image logs

Image logs are a type of geosteering tool that use LWD or wireline tools to generate images of the borehole wall, showing the features and textures of the formation. Image logs can provide detailed information on the formation lithology, bedding, dip, fractures, faults, and stress orientation. Image logs can help you interpret the formation geology and history, as well as identify the potential reservoir zones and sweet spots for geosteering.

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?