Study on Productivity of Fracturing Horizontal Well Considering Acid-Wormholing Zone
In the process of acid fracturing in carbonate reservoir,the acid-wormholing are generated in the surface of the main fracture because of the effect of acid filtration to effect the productivity of these wells after acid fracturing.The seepage model combining with the for-mation,loop hole are,fracture and horizontal wellbore is completed based on the mechanism of staged fracturing in carbonate,which takes the acid-wormholing zone as a double-porosity system.Meanwhile,the mathematical seepage model of acid fracturing horizontal well is achieved considering the acid-wormholing zone.This paper makes programming and analysis the influence of fracture and wormhole parameters on the productivity with the discrete math-ematics equations.The results are as follows:1)The productivity are increases as a increasing fracture number,fracture length and fracture flow conductivity and the degree of influence are is in turn.2)Acid fracturing horizontal well production is increases as a increasing wormhole conductivity and length,which the length has a relatively greater impact on the production.
productivity of acid fracturing horizontal wellacid-wormholing zonefracture parameterswormhole parameters
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