Technological progress and development directions of PetroChina overseas oil and gas field production

MU Longxin,CHEN Yaqiang,XU Anzhu,WANG Ruifeng

Table 4 Pore structure and lithofacies characteristics of Mishrif reservoir in Halfaya oilfield (modified according to reference [2]).

Sedimentary environment Lithological association Typical thin section Logging characteristics Pore size distribution Poro- sity/ % Permea- bility/ 10-3 μm2 Mercury injection pressure/ MPa Platform margin beach Mainly thick layer bioclast grain limestone, mud-bearing bioclast limestone 24.0 121.0 35.4 The wings of platform margin beach Marly grain limestone and thin layer grain limestone 22.7 34.3 78.0 Intra-platform beach, the wings of platform margin beach Mainly muddy limestone, with marly grain limestone and dolomitization 19.4 10.5 82.0