A new method of metamorphicrock buried hill fracture reservoir modeling

Metamorphicrock buried hill reservoir is a type of complex fracture reservoirs and hard to characterize. The paper proposes a new method for buried hill modeling, to establish double porosity model, including fracture and matrix. In matrix modeling process, metamorphic lithology theory is used to characterize the complicated distribution of lithology for phase modeling, and matrix model with porosity and permeability under the control of lithology phase condition is completed by random simulation modeling. The data of lithology come from well logging in buried hill reservoir. In fracture modeling, the feature of strong anisotropy of permeability in formation is considered and a new method of fracture modeling is applied to characterize the fracture system. Then the method is used in history matching of real reservoir simulation to test the reliability, and the result shows the model by new method are closer to real reservoir than model by common method.