Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq

SUN Wenju,QIAO Zhanfeng,SHAO Guanming,SUN Xiaowei,GAO Jixian,CAO Peng,ZHANG Jie,CHEN Wangang

Fig. 5. Tidal channel microfacies in MB1-2 sub-member of Mishrif Formation, Well Y161 in Halfaya Oilfield. (a) 3005-3005.5 m, grainstone with bi-directional cross-bedding, core photo; (b) 3004.0-3004.5 m, grainstone, with bi-direction cross-bedding, core photo; (c) 2993.0-2993.5 m, packstone with mud-rich seams, core photo, (d) 2992.0-2992.5 m, wackestone with mud-rich seams, core photo; (e) 3005.1 m, grainstone with intergranular pores and bioclastic cavity pores, cast thin section; (f) 3004.1 m, grainstone with intergranular pores and a small number of intragranular dissolved pores, cast thin section; (g) 2993.1 m, packstone with bioclastic cavity pores, matrix micropores, and marl partially dolomitized, cast thin section; (h) 2992.1 m, wackestone with automorphic dolomite in scattered distribution, cast thin section.