Different methods of Turonian hydrocarbon deposits shielding in case of fluid contacts clarification

The fluid model of a field frequently becomes more complex during the exploration improvement. When developing a 3D model, it is necessary to take into account all available geological information without losing the quality and speed of model update. Based on Turonian hydrocarbon deposits, the methods of geometrization of a reservoir producing part are described in detail, particularly, with tectonic or lithologic shields, by using non-horizontal surfaces and additional structural borders or by separating deposits blocks with different fluid contacts. The benefits and concerns of using these methods in the 3D geological model update and the certainty of their geological substantiation are analyzed. The best method to modify the field model, which is consistent with concept of the reservoir geological structure, is selected.