Rock-physics-assisted well-tie analysis for structural interpretation and seismic inversion

Well-tie analysis is a starting point for mapping facies and geology observed at well locations onto seismic cubes. This step is very important for any application that uses seismic and well data together, and can secure more accurate results by increasing consistency between seismic and well log data. A high-quality well-tie is normally considered as the art of an interpreter and is usually practiced through stretch and squeeze of the synthetics log. Many factors can affect the quality of a well-tie, and well log quality is one of the more important ones. However, interpreters and geophysicists focus mainly on seismic and wavelet components and assume well logs as hard data. In practice, well logs are susceptible to different types of errors which may not be fully addressed during the petrophysical work. This paper goes into more detail about this issue and suggests rock physics as an efficient tool for repairing well logs to achieve a better-quality well-tie. Furthermore, different examples from various studies are presented to show the importance of improving well logs using an appropriate rock physics model before well-tie analysis.