An Advanced Ultrahigh-Definition Directional Electromagnetic Propagation Logging Tool for Mapping While Drilling and Multilayered Formation Evaluation

作者：Schlumberger, Hui Xie, Keli Sun, Schlumberger, Ettore Mirto, Schlumberger, Joe Gremillion, Schlumberger, Sarwa Tan, Schlumberger, Kent Harms, Schlumberger, Jianguo Liu, Schlumberger, Yao Rong Feng, Schlumberger · 发表于：SPWLA 63rd Annual Symposium Transactions · 年份：2022 · DOI：10.30632/spwla-2022-0050 · 被引用次数：4 · 研究领域：Geophysical and Geoelectrical Methods、Geophysical Methods and Applications、Seismic Imaging and Inversion Techniques

Logging-while-drilling (LWD) electromagnetic (EM) propagation measurements and interpretation techniques have been widely used for reservoir boundary detection in geosteering applications. With more formation information provided near the wellbore during drilling operations, it can still be challenging to obtain an accurate resistivity formation profile in complex scenarios such as multilayered geological structures. This is particularly evident in in high-angle and horizontal (HA/HZ) wells drilled in thin-laminated formations. This paper will present a newly developed LWD mapping-while-drilling service to enable advanced geosteering and formation evaluation in multilayered geological structures. A new electromagnetic multilayer mapping-while-drilling (MLM) tool was designed to measure a complete set of electromagnetic responses in complex formation geometry and anisotropy environment. This tool consists of an industry’s first combination of multi-spaced axial, tilted, and transverse current loop-antennas operating in a multifrequency configuration. The tool measurements are designed so that formation resistivity and geological structure change can be observed directly while drilling. The existing tool offers conventional apparent resistivity, symmetrized, and anti-symmetrized directional measurements. The new tool also provides calibrated deep-resistivity channels acquired from tilted-axial array and anisotropy measurements taken from the transverse antenna. These additional...