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Keywords = horizon auto-tracking

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17 pages, 18064 KiB  
Article
Real-Time Automated Geosteering Interpretation Combining Log Interpretation and 3D Horizon Tracking
by John D’Angelo, Zeyu Zhao, Yifan Zhang, Pradeepkumar Ashok, Dongmei Chen and Eric van Oort
Geosciences 2024, 14(3), 71; https://doi.org/10.3390/geosciences14030071 - 9 Mar 2024
Cited by 1 | Viewed by 2683
Abstract
Existing methods for estimating formation boundaries from well-log data only analyze the formation along the wellbore, failing to capture changes in the 3D formation structure around it. This paper presents a method for real-time 3D formation boundary interpretation using readily available well logs [...] Read more.
Existing methods for estimating formation boundaries from well-log data only analyze the formation along the wellbore, failing to capture changes in the 3D formation structure around it. This paper presents a method for real-time 3D formation boundary interpretation using readily available well logs and seismic image data. In the proposed workflow, the mean formation boundary is estimated as a curve following the well path. 3D surfaces are then fitted through this boundary curve, aligning with the slopes and features in the seismic image data. The proposed method is tested on both synthetic and field datasets and illustrates the capabilities of accurate boundary estimation near the well path and precise representation of boundary shape changes further away from the well trajectory. With this fully automated geological interpretation workflow, human bias and interpretation uncertainty can be minimized. Subsurface conditions can be continually updated while drilling to optimize drilling decisions and further automate the geosteering process. Full article
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