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UPPER CRETACEOUS RESERVOIR ROCKS IN TATAOUINE AREA. SEDIMENTARYCHARACTERS AND SEQUENCE STRATIGRAPHY

HANDOURA Moncef , HANINI Amine, ZAGRANI Mohamed Faouzi, NEGRA Mohamed Hédi, 2006

Tunisian Petroleum Exploration and production Conference, 1, 26, 11, Octobre 2006

Résumé

In Chenini section, located 20 km to the West of Tataouine, Upper Cretaceous series starting with siliciclastic deltaic facies and ending with shallow marine carbonates, are correlatable at a regional scale, at least, in the whole Dahar. These facies are organised into third order sequences. The first sequence, Albian to Cenomanian in age, includes Chenini sandstones, Radhouane dolomites and the lower part of Kerker Formation. The second sequence, Cenomanian in age, includes the middle and upper part of the Kerker dolomites. The third sequence, Cenomanian to Turonian in age, is constituted of the Gattar dolomites; it starts on a transgressive surface marked by fossiliferous carbonates. In terms of reservoir characters, intercrystal to vuggy pores are mainly developed in carbonates of Radhouane, Kerker and Gattar Formations, intergranular pores are mainly developed in the Chenini sandstones.