Some Features of the Bazhenov Formation Reservoirs Petrophysical Model

Publications review of Russian and foreign authors reveals a wide variety of approaches to the interpretation of clay reservoirs. Recommended geophysical methods also differ, as well as the composition of petrophysical relationships and their aggregation models. Authors present their own approach to interpretation Bazhenov deposits and examine its differences from recommendations and suggestions of other authors. The report examines and compares different approaches to the systematic description of a model system of the Bazhenov formation reservoir rocks as well as lithologically and petrophysicaly similar objects and prospects for the expansion and development of their model. Authors single out the methods based on the layers packets identification, identification of lithotypes by logging data, electrofacies use, as well as estimates of the volume model parameters. Authors consider including link-models in addition to equations of component contents relationship with the measured logging readings. They underline the role of the component model relationship with pyrite, sulfur, and TOC containment. We consider the simplest diagnostic signs of collector, in particular, resistivity, neutron and GRay data measured in scales with external, internal and local normalization. Authors also offer interpretation of historical oil production data for a specific object, which indicates significant dependence of production volume not only on volume mineral data, but also on some geological parameters. In our opinion, this illustrates the importance of effective filtration channels and their relation to geological parameters