The mechanical behavior of some Adriatic soft weak reservoir rocks obtained from cores is characterized taking into account water saturation effects. The characterization includes triaxial compression, and uniaxial strain (oedometric) tests, as well as water injection tests under reservoir conditions. From the experimental results, a uniaxial strain compaction model for weak rocks is calibrated for use in reservoir compaction studies in the Adriatic Sea area. A porosity-dependent elastoplastic model is used to capture the variation of compaction in the materials in the reservoir zone.

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