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ABSTRACT: This paper focuses on the validation of the Moving Reference Point (MRP) technique using an independently pressure-matched planar commercially available 3D hydraulic fracturing simulation model with real field cases like multiple perforations and laminated reservoirs. The paper provides a methodology for concluding the lessons learned from hydraulic fracture treatments and taking the right preventative action in the hydraulic fracture treatments. The fracture propagation events like normal fracture propagation, height propagation, or propagation in the excessive leak-off zone were simulated on the pressure calibrated planer 3D model matched the event detected using the moving reference point based on the recorded bottom hole pressure. The integration of simulation and analysis presented in this paper assesses the use of the MRP technique to detect fracture propagation events during the fracture treatments in wells where accurate simulation data is not available. Unlike the previous applications of MRP, this application has complete well-completion data and petro-physical information. INTRODUCTION Detection of fracture events during fracture execution has a crucial role in the optimization of hydraulic fracture treatment it is a one-time operation. Once the optimum design is not achieved during execution, it couldn’t be achieved again. Consequently, taking the right action during fracture treatment is crucial in the success of hydraulic fracture and achieving the optimum post-fracture production. The pumping rate or fluid viscosity can be modified or call for an early flush is requested based on the understanding of fracture propagation during the execution based on the right detection of the fracturing events. The well-known Nolte-Smith method (1981) analyzes the treating pressure of a formation during pumping assuming all fracture events are referred to the initial fracture initiation point (regardless of the height covered by propagation during main fracture treatment). The net pressure is calculated based on the closure and plotted versus time for the start of the treatment on a log-log scale. Ayoub et al. (1992) introduced the pressure derivative of treating pressure analysis to be a good tool for fracture event detection. |
