We present the technical basis for bridging the wide structure data-gap at the heart of the oil and gas production business: the scale of geological detail in the range between a few tens of centimetres to a few meters. This scale range is at least an order of magnitude smaller than is resolvable with current means. Many reservoir properties such as permeabilities are largely determined by the microscale behaviour of pore geometries and pore throats in the range down to millimetres or less.

The underlying unifying concept is that broadband vector seismic data contain a wealth of information regarding rock fabric and fluid content. Careful seismic field experiments, observation and data analysis can bridge the gap in the spatial knowledge of the reservoir between the very detailed, but laterally very limited information provided by borehole logging data and the spatially extensive but diffuse structural information provided by 3D seismic data. Measurements obtained in boreholes and aimed specifically at capturing certain elastic formation parameters are related through the geophysical model to reservoir parameters of direct engineering and economic interest in a series of "snapshots" of in situ distributions of fluids and rock masses, taken at opportune moments in the life of the reservoir and representing a substantial amount of reservoir volume in centimetre to metre detail.

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