Introduction
Weak and/or deformable rock drives fluid. Examples include.
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The Ekofisk field (discovered in 1969), Norwegian North sea, is an example of a compacting chalk reservoir with considerable subsequent seafloor subsidence due to petroleum production.
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“Abnormally pressured gas“ reservoirs
References:
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T. A. Blasingame, PETE 663: Introduction to Reservoir Engineering, Texas A&M Course Notes, 2014
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PETE 2320: Reservoir Engineering, Northern Alberta Insititute of Technology (NAIT) Course Notes, 2019.