ABSTRACT:

Integrated Crosswell Seismic (ICS) is set of innovative techniques - devised and proposed to characterize the internal structure of a reservoir - that is now evolved from being primarily an exploration tool to a development and production tool. This paper gives a few examples of such an evolution, presenting the results of some ICS applications that Eni has carried out on its operated producing oil fields - located in Italy and oversea - as a part of a continuous R&D effort for improving the reservoir characterization process.The case histories here presented show how this methodology worked in reservoirs of different lithologies and geological frameworks, and prove how its high flexibility and applicability can substantially assist the reservoir management in providing important information for:

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    a higher resolution structural & stratigraphic imaging;

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    a better well-to-well log correlation;

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    the building and validation of the geological models;

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    the estimation of petrophysical properties and the detection of flow barriers;

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    the identification of "infill" drilling targets (e.g. for planning horizontal wells);

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    the time lapse monitoring and imaging of the fluid flow.

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