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This is a Experimental Study study.

October 13, 2025

Integrated Measurement-While-Drilling and Reservoir Mapping Technologies Enabled Effective and Economical Offshore Marginal Oilfield Development and Broke the ERD Well Records in North China Offshore

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Real-time measurement and mapping improved drilling performance in offshore marginal oilfields, suggesting new ERD records.

New ERD records were set in North China offshore with a 6566-m displacement and a 4.1 ratio.
Real-time drilling intelligence helped control ROP, optimizing parameters and reducing drilling risks.
The definitive dynamic surveys provided accurate trajectory control, minimizing depth uncertainty during drilling.
Ultradeep directional electromagnetic mapping successfully identified target positions, exceeding production estimates by 70%.

Li et al. (2025) studied this question.

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