Mechanisms for Overpressure Development in Marine Sediments

Overpressure is widely developed in marine sediments; it not only a critical factor related to hydrocarbon accumulation, but also serious safety issue for oil/gas exploration and exploitation. Although the mechanisms overpressure development sedimentary basins have been intensively studied, some new are proposed with advancements geological investigation, e.g., natural gas hydrate formation microbial activity. In this study, reviewed further classified as being associated physical, chemical, biological processes. The physical include disequilibrium compaction, sealing, degasification, buoyancy, hydrothermal pressuring, tectonic movement, transfer, etc. chemical ascribed decomposition, diagenesis, generation, mainly induced by production plugging. hydrate-bearing sediments, affecting distribution of hydrate. systems permeability deterioration due free accumulation below bottom-simulating reflectors (BSR). developments generally sediment layer low above below, sulphate–methane interface (SMI), because methane will be consumed anaerobic oxidation SMI.