期刊
COMPUTERS AND GEOTECHNICS
卷 156, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2023.105277
关键词
Fractured-vuggy carbonate reservoir; Acid fracturing; Hydraulic-mechanical-chemical coupling; Hierarchical fracture; Discretized virtual internal bond
This article presents a simulation method for acid fracturing in fractured-vuggy carbonate reservoirs. By hierarchically treating the natural fractures and considering the acidization of the fractures in both inactive and activated states, this method effectively simulates the activation, propagation, interaction with natural fractures, and connection with cavities. It provides a stable and efficient approach for simulating acid fracturing in complex fractured-vuggy carbonate reservoirs.
In a fractured-vuggy carbonate reservoir (FVCR) are distributed many irregular natural fractures and cavities. The acid fracturing is an effective stimulation method for FVCR. It involves the hydraulic, mechanical and chemical (HMC) field coupling process. To effectively simulate the acid fracturing in FVCR, the natural fractures are hierarchically treated. For the large fractures, which play the leading role in all physical fields, the fully coupled model is adopted. While for the small fractures, which play the leading role in part physical fields, the partly coupled model is adopted. By this means, the computation stability and efficiency are significantly improved. This is particular important for the field scale simulation of FVCR. Besides this, the acidization of the natural fracture in the inactive and activated states are considered. The simulation results suggest that this method can well simulate the acid fracture activation, propagation, interaction with natural fractures and connection with cavities in FVCR. It provides a stable and efficient approach for the acid fracturing simulation in complex FVCR.
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