... wellbore velocities against the predrill scenarios is provided along with corresponding vertical depth predictions. Lateral constraint was provided by the correlations of the VSP with the surface seismic image at key stages while drilling. Mapping of the drilling data to the velocity templates showed...

... China Sea. In this well, with the checkshot data and seisimic waveforms from SWD, an integrated solution was provided, including updates of the time-depth relationship, depth prediction for the high-pressure problem formations, pore pressure monitoring and updated prediction ahead of the bit. All...

... of the depth of top carbonate while drilling carbonate reservoirs is important to avoid losses and well control problems. This can have a significant financial impact. This paper demonstrates the use of innovative look-ahead VSP technology in Vietnam to refine depth prediction of the top of carbonate ahead...