Hydraulic Fracture Propagation in Pre-Fractured Natural Rocks

TitleHydraulic Fracture Propagation in Pre-Fractured Natural Rocks
Publication TypeConference Paper
Year of Publication2011
AuthorsMeng, C, De Pater, HJ
Conference NameSPE Hydraulic Fracturing Technology Conference
PublisherSociety of Petroleum Engineers
Conference LocationThe Woodlands, Texas, USA

We conducted a series of hydraulic fracture initiation tests with fractured natural rock samples. The objective is to characterize the interaction between hydraulic fracture initiation and natural fracture infiltration and opening. The natural fracture was simulated by cleaving a rock cube into two or three layers and putting the parts back together. The hydraulic fracture is initiated by pressurizing the borehole drilled perpendicular to the layers. The test parameters include rock type (sandstones and a tight limestone), confining stress and fluid type (silicon oil and cross-linked gel). A detailed model was built to simulate the hydraulic fracture interaction with a natural fracture. Qualitative agreement was found with the test results.