NDLI: Wormhole Propagation Behavior Under Reservoir Condition in Carbonate Acidizing

Content Provider	Springer Nature Link
Author	Liu, Ming Zhang, Shicheng Mou, Jianye Zhou, Fujian
Copyright Year	2012
Abstract	In carbonate reservoirs, acid is injected into the formation under breakdown pressure to react with the rock to remove the contaminations caused by drilling and production, which is called carbonate acidizing in reservoir development. In carbonate acidizing, acid flows selectively through large pores to create wormholes. Wormhole propagation under experimental condition has been studied by many experts. In this paper, a model which couples a two-scale continuum model simulating wormholing in the invaded zone and a reservoir flow model for the compressed zone was used to study the wormhole propagation behavior under reservoir condition. In this model, the porosity values which are uniformly distributed used in former literature follow the normal law. Based on the model, we first compared the results of the two porosity generation methods, and then studied the wormhole propagation behavior under reservoir condition, and finally simulated a two-layer formation to study the effects of distance and permeability ratio between the two layers. The results show that the normally distributed porosities simulate wormholing better. The effect of compressed zone on wormhole propagation increases with the decrease of compressibility factor and wormhole has a maximal value in length. The effect of distance between the two layers on wormhole lengths and acid distributions can be divided into three zones based on the wormhole length in the lower layer. A critical value of permeability ratio between the two layers exists, below and above which the wormhole length in the low permeability layer decreases sharply and almost keeps constant, respectively.
Starting Page	203
Ending Page	220
Page Count	18
File Format	PDF
ISSN	01693913
Journal	Transport in Porous Media
Volume Number	96
Issue Number	1
e-ISSN	15731634
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-10-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbonate acidizing Wormhole Reservoir condition Compressed zone Continuum model Civil Engineering Industrial Chemistry/Chemical Engineering Hydrogeology Classical Continuum Physics Geotechnical Engineering & Applied Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Catalysis

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