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Figure F18. Illustration of the effects of oceanographic and tectonic loading on formation fluid pressure and flow. (Figures after Wang and Davis, 1996; Wang et al., 1998; and Davis et al., 2000.) A. Schematic illustration showing response of fluids at pore and formation scales. B. Response to loading can be broken into elastic (instantaneous) and diffusive components. C. Transients propagate away from a boundary between regions of contrasting elastic properties as a damped diffusive wave with a characteristic scale that depends on permeability. (Continued on next page.)

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