«Geology, geophysics and development of oil and gas fields»

Study of the influence of carbonate rocks secondary transformations on the filtration and capacitance properties of reef reservoirs

UDC: 622.276.038
DOI: -

Authors:

¹ Perm National Research Polytechnic University, Perm, Russia

Keywords: carbonate reservoir, porosity, permeability, secondary transformations of rocks, petrotyping

Annotation:

The development of carbonate reservoirs is accompanied by various geological features that should be taken into account when constructing geological-hydrodynamic models, when predicting production levels and when planning geological-technical activities. The main feature is the significant heterogeneity of reservoir properties, caused by the cycling of sedimentation, uneven secondary transformations of rocks and the complex structure of the reservoir. The structure of the reservoir is largely determined by the development and intensity of secondary processes. The article also analyzes the geological structure of complex carbonate reservoirs of four fields, confined to a single second-order structure, similar in terms of sedimentation conditions and the development of secondary processes. The main secondary processes developed in the area under study are dolomitization, leaching and fracturing. The data of petrophysical and lithological studies of core and thin sections were analyzed and systematized and tomographic studies were performed to study the structure of the void space. Petrotyping of rock samples was carried out. Using mathematical statistics methods, the influence of secondary transformations on reservoir properties was assessed.

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