Normalizing Gamma-Ray Logs Acquired from a Mixture of Vertical and Horizontal Wells in the Haynesville Shale

摘要

This article introduces a practical workflow of normalizing gamma-ray (GR) logs acquired from both vertical and horizontal wells penetrating different geological subzones in the Haynesville shale. Gamma-ray logs are first normalized in all vertical wells over the same stratigraphic zone. The normalized GR log in the nearest vertical well is then used to reconstruct synthetic GR logs along horizontal well paths using true stratigraphic projection method. The measured GR logs from the horizontal wells are then compared and normalized with the synthetic GR logs to enforce statistical consistency with the normalized GR logs in the associated vertical well. The workflow delivers a set of normalized GR logs in a group of vertical and horizontal wells that provide a reliable basis for reservoir description and modeling.