METHOD FOR ASSESSING CHANGES IN CHARACTERISTICS OF VOID SPACE OF CORE OR BULK RESERVOIR MODEL DURING PHYSICAL AND CHEMICAL MODELING OF THERMAL STEAM TREATMENT Russian patent published in 2023 - IPC G01N23/46 G01N15/08 

FIELD: modelling.

SUBSTANCE: invention is intended to assess changes in the characteristics of the void space of a core or bulk reservoir model during physical and chemical modelling of thermal steam treatment. The object of study, a rock sample, is placed in a radiolucent core holder, and a formation model is created; X-ray computed microtomography of a radiolucent core holder comprising the object of study is carried out for the purpose of primary description of the structure of the void space and determination of the initial void ratio; an X-ray transparent core holder is placed in an installation for physical and chemical modelling of filtration processes, the initial permeability of the created formation model is determined at a constant total volumetric filtration rate until a steady state is achieved, recorded by stabilization of the differential pressure gauge readings; reservoir conditions are created in the unit, physico-chemical modelling of steam-thermal treatment is done; the final permeability of the reservoir model is determined at a constant total volumetric filtration rate until a steady state is achieved, recorded by stabilization of the differential pressure gauge readings; the unit for physical and chemical modelling of filtration processes is disassembled and, without violating the integrity, X-ray computed microtomography of the formation model placed in an X-ray transparent core holder is repeated in order to assess the change in the void ratio of the sample.

EFFECT: providing the ability to assess changes in the characteristics of the void space of a core or bulk reservoir model during physico-chemical modelling of high-temperature (up to +400°C) thermal steam treatment.

3 cl, 2 dwg