Bazhenov Formation Sweet-Spot Prediction on the Basis of Geophysical Data

Bazhenov formation in point of seismic is clear amplitude marker horizon which is characterized by low values of acoustic velocity and density. The object of seismic forecast for this formation is complicated by the lack of productivity potential intervals clear defined characteristics in well logs, high compositionally-textural heterogeneity and presence of natural fractures. One of the methods to increase forecast reliability is modern technology of quantitative seismic interpretation based on the elastic rock model. Since bazhenov formation productivity potential intervals are mainly associated with dolomitization, which is appeared as a result of epigenetic alternation, it is important to take into account these processes considering areal forecast. To evaluate and analyze the factors influencing the bazhenov formation epigenetic alternation, it is beneficial to use the gravitational and magnetic survey interpretation results which provides data on the pre-Jurassic basement composition responsible for bazhenov deposits alterntion controlling. In this regard bazhenov formation productivity forecast requires to engage all the available geophysical data and multiple seismic processing and interpretation techniques attended by integration and mutual verification of the results. This paper considers the approach to predict sweet-spots of unconventional bazhenov formation on the basis of well data and areal geophysacal exploration methods.