Abstract The stress sensitivity of abnormally pressured carbonate gas reservoirs is great complexity and exerts much influence on well deliverability calculation. Fifty core samples from the AD Gas Reservoirs were selected in experiment to study effect high pressure fracture reservoir. results show that permeability decline mainly occurs high-pressure stage rather small normal stage. existence ...

A reservoir-scale numerical conceptual model was established according to the actual geological characteristics of a carbonate fractured-vuggy reservoir. Considering difference in density and viscosity fluids under reservoir conditions, CFD (computational fluid dynamic) porous medium applied simulate process nitrogen displacement after water flooding. The effects gas injection rate, mode, injec...

With little to no natural fracture development and the high calcite content in porous carbonate reservoirs, for multistage acid fracturing, different fluids are used form a viscous fingering fracture, thus enhancing degree of nonuniform etching. However, existing studies on fracturing mainly focused combination fluid acid, which is less specific rocks. Here, rheological properties five fluids, ...

a r t i c l e i n f o The existence of vugs or cavities in naturally fractured reservoirs has long been observed. Even though these vugs are known for their large attribution to reserves of oil, natural gas, or groundwater, few quantitative investigations of fractured vuggy reservoirs have been conducted. In this paper, a multiple-continuum conceptual model is presented, based on geological dat...