It is well-known that depth imaging brings viable solution to complex problems and<br>helps interpreters to quantify and to understand the architecture of the reservoir under<br>study. This recognition leads to a pressure to depth-image larger and larger areas and<br>to shorten the delivery delay. However, the success of a depth imaging projects<br>requires testing of different methodologies and relies on several trial and errors during<br>depth velocity model building. This means the use of costly iterative sequential<br>scheme of full PSDM followed by linearized tomographic inversion.<br>We present here a new method for depth velocity building which we believe will help<br>us to achieve a fast turnaround of depth imaging project and give us full flexibility for<br>testing and adjusting our model parameterisation and inversion setting.


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