Time-Depth Conversion- A Case Study of West Oil Field, UK
Keywords:
Time-Depth Conversion, West Oil Field, constant interval velocity, linear velocity, Top SherwoodAbstract
Time-Depth conversion analysis was carried out on the West Oil Field, to predict depth and velocity away from five existing well control points to predict hydrocarbon volumes in reservoirs and the feasibility of future well depths. Depending on the velocity characteristics of the layers, two velocity models have been applied in the time to depth conversion; constant interval velocity and the linear velocity (V0, k). A justification of this velocity approach is that the constant velocity model accounts for layer thickening and thinning while the linear velocity (V0, k) approach gives a rigorous description of velocity increasing with depth. Errors between well depths and formation tops for the Top Sherwood  reservoir were found in the range -4 to 49, after the analysis of the final depth conversion, the errors were drastically reduced to between -0.11-1.57.
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