Research Progress of Wormhole Physical Modeling in Carbonate Formation
Wormhole is the most typical and basic feature of carbonate formation matrix acidizing,and its size and morphology is of vital importance to acidizing result.The study on the physical experiments of wormhole has guiding significance for the study of acidizing mechanisms and treatment designs of the carbonate reservoir.In this paper,the important achievements and latest progresses of the linear and radial linear core flow tests are reviewed,and it was pointed out that the real-time characterization of acid-etched wormholes was the development direction of linear core flow test,and the controversy over the influence of core parameters such as permeabilities and dimensions on the worm-hole propagation should be further studied by the real-time wormhole characterization method,using of electrical resis-tivity logging and and tracers.To investigate the relationship between acid volume to break through and core param-eters,it was suggested to upgrade the core flow experiment and characterization equipments,so as to conduct re-search on the influence of different parameters on wormhole propagation,in which the upscale from the laboratory scale to field scale should be highlighted.It was also suggested to strengthen the field application of the electrical logging method,so as to realize the lab scale and field scale wormholing real-time observation and characterization.
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