Mesozoic Carbonate Facies and Reservoirs in Central Palmyrides, Syria

By

 Dubravko Lucic¹, Srecko Maretic¹, Goran Forsek¹, Damir Takac², Ivica Mesic³

(1) Ina Naftaplin, Branch Office Damascus, Damascus, Syria (2) INA-Naftaplin, Exploration Division, Zagreb-Croatia, (3) INA, Laboratory Res. Dept., Zagreb-Croatia,

 In central Palmyrides on the onset of the Permian rifting and opening of Neo-Tethys, post rift Triassic Formations; Amanus Shale, Kurrachine Dolomite, K. Anhydrite, Butmah, Adayah, Muss, Allan and Sergelu consists of carbonates and evaporites of various thickness deposited mainly on the stable, sometimes very shallow carbonate shelf. Locally in the Uppermost Triassic sedimentary hiatus is present before the deposition of the Sergelu Fm. The transgression that had begun in the Upper Triassic continued in the Lower Jurassic as well. Jurassic Formation-Hara Moun is composed of carbonate rocks. Dominant are biomicritic and micritic limestones and dolomites. The Jurassic surface is heavily eroded and karstified. The Late Jurassic hiatus and erosion continued also in the Cretaceous. In Early Cretaceous in addition to extensive unconformity, volcanism is widespread. In regional sense, E. Cretaceous transgression covered the most of the area with continental and shallow marine clastics of Rutbah Fm. Slow subsidence continued in Albian-Turonian and thick portion of shallow platform carbonate deposits are present in the entire area (Hayan and Judea Fm.). At the end of Cretaceous in Senonian, sedimentary facies indicate increasing in water depth. Deposits of the Soukhne Group (Coniacian-Campanian), Rmah Chert and Arak Marl Fm., exhibits an increased marl content. The Maastrichtian, Shiranish Formation consist of pelagic marly limestones and marls indicating great water depth. The main HC reservoirs in the region K. Dolomite, Butmah, Hayane and Judea are studied in more details using outcrops and wells data.