ИСТИНА

Production of gaseous and liquid hydrocarbons from tight reservoirs is an important part of modern oil and gas industry. Engineers deal with various reservoir properties of such reservoirs that are determined by pore structure of rocks. In tight reservoirs pores and fractures in rocks exist on scales from centimeters to nanometers. Very small pores lead to the extremely low permeability of reservoirs. Examples of such pores are presented at the below. It means that due to relatively small fluid drainage zone inflow of hydrocarbons to the well will be low. To increase the efficiency of inflow, the drainage zone should be extended. This requires the application of near-wellbore stimulation, such as hydraulic fracturing. Laboratory experiments of hydraulic fracturing operation on rock scale allow predicting parameters of hydraulic fracture propagation to some extent on the reservoir scale. Traditional methods of rock exploration do not allow a complete evaluation of fracture distribution anisotropy, i.e., real capacity of the void space and microstructural features at different scales. For qualitative and quantitative estimation of reservoir properties, microstructures and compositions of rock samples, novel methods are required which will take into account high degree of heterogeneity of samples and provide high accuracy and reliability of results. One of the methods that takes into account microscale can be proposed methodology based on the mathematical processing of rock tomography at the microscale.