In this paper it is considered the problem of forecasting of the ecological after-effects, which can arise as result of escapes from the oil and natural gas pipelines disposed on seabed. It is stated the principal position of the mathematical models, which describe the spreading of oil drops and gas bubbles in the marine environment under action of currents and turbulence and with account of its buoyancy and dispersibility. In these models secondary effects are valued: transference of poison gases dissolved in anaerobic near bottom layer to sea surface and formation of petroleum slicks on sea surface. Models allow to estimate the spatial configuration of gas bubbles and petroleum drops plumes, which are necessary for creation and effective application of the remote sensing for detection of escapes of petroleum and natural gas from seabed wells and pipelines. Models are useful for forecasting of the ecological conditions in regions of oil-and-gas fields on seabed. The efficiency of models are illustrated by results of calculations.
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