MPD for reservoir characterization in green field applications is often seen as vital for providing operators with valuable information about the reservoir's physical properties while drilling. This aspect of Managed Pressure Drilling (MPD) in mature fields is not often a driver for implementation as these characteristics are typically well-defined. However, external factors such as unintentional communication between drilling and fracking operations can significantly alter known reservoir characteristics. The proppant exponentially enhances the permeability of both the child and parent well. While the fracturing fluid initially increases the pore pressure and stress environment in the near wellbore region, followed by its subsequent reduction, the rate of which is dependent on the dominant regime: flow back on the parent well, pressure equalization of the reservoir, and/or diffusion of fluid into the drilling mud.

The challenges and interactions associated with unintended frac communication and how primary reservoir characteristics are fundamentally altered as a result will be discussed. Additionally, the results of each reservoir characterization test can be interpreted to adjust the plan forward and utilized to navigate these transient wellbore conditions. Thus, providing clear insight into the wellbore's evolving drilling window, enabling the safe drilling and completion of the "fracked into" well.

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