Fracturing Net Pressure Diagnoses Modeling for Volcanic Reservoir

Abstract Fracture net pressure examination is a widely used method before hydraulic fracturing. It is very crucial for understanding the characteristics of the formation, the complexity of the fracture as well as improving the success ratio of fracture operation, optimizing the fracturing design, evaluating the operating and the fracturing completion. Due to the nature of volcanic reservoir fracture mechanism, filtration mechanism, percolation mechanism, as well as the complex status of fracture initiation and extension of Daqing reservoir, in order to realize the characteristics of reservoir and fractures, and, to ensure the successful field operation, it is very important to conduct the test fracturing and field examination before major fracturing. After practising fracture tests in nearly 100 wells and analyze the effects of different volcanic reservoir physical characteristics on the fracturing operation, we developed six categories of G function pressure analysis methods and four standardized methods for examining the volcanic fracture complexity level by evaluating the characteristic parameters. We also developed fracturing operation technique for volcanic reservoirs and corresponding theoretical explanation methods, and built the specifications to control the operation risk which is based on the fracture test data, realized the accurate control scheme selection and effective execution, as well as improved the controllability on the fracturing operation of volcanic reservoir. According to the data collected from the filed operations, the success ratio is increased from 36% to 90% after applying this method.