Recovering more oil from a reservoir depends on obtaining a better understanding of the fluid/fluid and fluid/rock interactions over u wide range of scale lengths. Recent advances in understanding and modelling the behaviour of cracked and porous rock and developments in seismic instrumentation open the possibility of monitoring the movement of production and IOR fronts and interpreting the behaviour in terms of crack physics. Prototype strings of three-component broadband receivers and sources are designed to pass down production tubing into the reservoir, where seismic resolution is at least an order of magnitude better than in conventional techniques.

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