Prediction of Overpressure Zones in Marine Sediments Using Rock-Physics and Other Approaches

Dubinya, N.; Bayuk, I.; Hortov, A.; Myatchin, K.; Pirogova, A.; Shchuplov, P.

Авторы: Dubinya Nikita, Bayuk Irina, Hortov Alexei, Myatchin Konstantin, Pirogova Anastasia, Shchuplov Pavel
Журнал: Journal of Marine Science and Engineering
Том: 10
Номер: 8
Год издания: 2022
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 1127
DOI: 10.3390/jmse10081127
Аннотация: The paper discusses the problem of localizing zones of high pore pressure in sub-bottomsediments (first tens of meters under the seafloor). Prediction of the overpressure zones in thenear-surface is required for the mitigation of risks at the early stages of the offshore hydrocarbon fieldexploration and development. The results of seismic data interpretation generally serve as the mainsource of information for this kind of problems, yet there are other methods to predict overpressurezones in the subsurface. The paper presents the results of the overpressure zone prediction usinga set of methods including empirical ones, and the approach based on rock-physics modeling thatfeatures the soft-sand model of unconsolidated media effective properties. While the rock-physicsmodeling grants the most reliable result, it is also the most demanding method to the input data.Hence, it can be used to verify other methods of the overpressure zone prediction. We present theresults of the overpressure zone prediction at the research site on the Black Sea shelf. The mitigationof the drilling risks via changing the drilling conditions is discussed in detail. As the drilling throughthe overpressure zones is often a necessity, the engineering solutions proposed in the paper can beapplied elsewhere when facing similar problems typical for offshore exploration.
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Prediction of Overpressure Zones in Marine Sediments Using Rock-Physics and Other Approachesстатья

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