The end of thesis is a privileged moment to thank all the people who encouraged me and supported me to achieve this work. I would like to express my thanks to my supervisors, Ms.Mathilde Adelinet and Ms. Lama Inati. Thank you for your guidance and advice throughout this thesis project. Your efforts have been essential in guiding me and providing me with the knowledge and skills needed to complete this research, as well as to mitigating the difficulties tackled during my project. I sincerely thank you for your support that made these years enjoyable and successful. I would like to thank Mr. François Fournier and Mr. Yves Géraud as well for the time devoted to evaluating this thesis work as reviewers. I wish also to thank Mr. Jérôme Fortin, Mr. Ludovic Bodet, and Ms. Laetitia Le Pourhiet for having accepted to be the examiners of this thesis.I would like to express special thanks for Mr. Fadi Nader for contributing to this work, especially during the field work conducted at the beginning of this thesis project. The knowledge and experience he shared, as well as his comments throughout this project have indeed contributed to making this work successful. I would also like to thank Mr. Cédric Bailly for his contribution to this project, especially in the field work and the petrophysical laboratory measurements.My thanks also go to the Lebanese Petroleum Administration (LPA), for Mr. Wissam Chbat -

Outcrop analogues play a key role in the characterization of subsurface carbonate platforms. The lack of well data and relevant outcrop analogues can result in the misinterpretation of seismic data. To address this issue, we apply an integrated workflow based on sedimentology, geophysics and petrophysics on outcrop analogues present onshore Lebanon, to constrain the carbonate platform's properties on onshore seismic data. A thorough sedimentary description is completed for a 400‐m‐thick Cenomanian–Turonian carbonate platform located in Kfarhelda, northern Lebanon. P‐wave velocity is acquired directly on the outcrop, and the petrophysical properties are measured on 44 samples. A 1D synthetic seismogram is computed with Ricker wavelet 25 Hz resembling seismic resolution. The resulting reflectors are mainly (1) high amplitude reflectors at the limit between two facies with contrasting physical properties enhanced by diagenesis, (2) moderate amplitude reflectors corresponding to stratigraphic limits at the transition between facies and (3) very low amplitude reflectors in karstified units. The integration of outcrop and seismic data is based on the generation of the synthetic seismogram to identify the geological origin of reflectors. The best fit between the synthetic seismic and seismic profile is used to interpret a seismic facies representing bedded limestones of Sannine and Maameltain formations (Cenomanian–Turonian). Two other distinctive reflectors are identified at the boundary of the Marly Limestone Zone, and the Channel facies unit characterized by bioclastic packstone to floatstone. This study highlights the importance of using outcrop analogues to identify the seismic signal of stratigraphic sequences and improve the interpretation of onshore seismic data.