Real-Time EM Look-Ahead: A Maturing Technology to Decrease Drilling Risk in Low Inclination Wells
- Jean Seydoux (Schlumberger) | Jean-Michel Denichou (Schlumberger) | Irlan Amir (Schlumberger) | Vera Wibowo (Schlumberger) | Thorsten Bauch (Schlumberger) | Diogo Salim (Schlumberger) | Mauro Viandante (Schlumberger) | Shim Yen Han (Schlumberger) | Chao Wang (Schlumberger) | Guillermo Cuadros (Schlumberger) | Michiko Hamada (Schlumberger) | Sarwa Tan (Schlumberger) | Yao Feng (Schlumberger) | Soazig Leveque (Schlumberger)
- Document ID
- Society of Petrophysicists and Well-Log Analysts
- SPWLA 60th Annual Logging Symposium, 15-19 June, The Woodlands, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. held jointly by the Society of Petrophysicists and Well Log Analysts (SPWLA) and the submitting authors
- 5 in the last 30 days
- 234 since 2007
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Exploration and appraisal in vertical wells have always faced many challenges related to drilling risks and geological uncertainties. Effective positioning of the casing shoe above a problematic zone or a reservoir, optimizing coring location, geo-stopping before potential high pressure or depleted zone ahead of the bit, avoiding potential kick, mud loss, or stuck pipes are some of the challenges that the industry is currently mitigating in a reactive way.
With the recent introduction of the LWD EM Look-Ahead technology, real-time detection of resistivity features up to tens of meters ahead of the bit allows to be pro-active in reducing drilling and geological risks related to the exploration challenges mentioned above.
EM Look-Ahead has been extensively tested in the past 5 years in many locations around the world and under different conditions with success. As this technology is relatively new and still evolving, so is the learning curve for its implementation. Most importantly, how do we make the crucial geo-stopping decision based on the identification and correct interpretation of target formations ahead of the bit in real-time. This innovative EM Look-Ahead technology avoids unnecessary operation adjustments and extra casing set, thus significantly improve overall drilling efficiency and save overall well cost (Khalil et al., 2018).
In this paper, the EM Look-Ahead technology response and sensitivity for key applications in vertical well are reviewed. Field results and simulated examples provide an understanding of the technology capability, limitation, and lessons learned both in interpretation, decision taking, and operational deployment. Finally, the future of the technology is discussed.
EM Look-Ahead is a new and powerful technology that is expected to grow significantly and be widely adopted in the next few years to benefit many segments of the industry as a safe and efficient addition to the exploration and appraisal phases. As the technology matures, proactivity in reducing drilling risk will become the new standard in geo-stopping.
|File Size||3 MB||Number of Pages||18|