Large-diameter, long-interval tubing-conveyed perforation (TCP) operations are an important part of modern deepwater completion designs. Perforation jobs typically place a large dynamic load on the downhole equipment. Predicting the magnitude and transient behavior of such loads is a critical step in developing completion designs that avoid damage or destruction to tool strings and production equipment. Consequently, numerical modeling for accurate prediction of pre-job perforating designs is critical to mitigating risk for completing complex wells in a cost-effective manner.

The paper presents numerical simulations that are conducted using a dynamic perforation modeling tool. The modeling software is an engineering and scientific tool that simulates the dynamic response of a cased or uncased wellbore, its contents, and the porous rock formation to the energy released by gas-generating and stored pressure sources. In particular, the model can be applied to predict the shock loads generated during TCP operations. This paper presents successful predictions of pressure transients for deepwater well completions in West Africa and the Philippines. The results from both examples demonstrate how simulations are used to mitigate risk and design successful completion strings. In addition, some recent improvements to the modeling platform are presented, including a more efficient pressure solver, the implementation of a new tool-string friction model, and a new interface to the simulation output data. Finally, the paper ends with the next steps in the development of shock modeling capabilities of the software.

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