Abstract
The evaluation of the effectiveness of the development of the Northern section of the I object of the Karazhanbas field by injecting a coolant into the reservoir is considered. To intensify oil production in hard-to-recover reserves of the field, thermal methods are considered, such as the use of hot water and steam as an injection agent into the productive reservoir, the creation of a combustion front or a high-temperature zone in the reservoir. Considering the development trend of the northern territory of the Karazhanbas field, it was found that reservoir energy is depleted, reservoir oil properties change, becoming more viscous, resulting in a rapid decrease in production rate and pressure drop, with an increase in water cut. Modeling the application of in situ combustion technology (ICG) is of practical importance in the conditions of the Karazhanbas field and will improve the efficiency of using technically possible heat carriers. An analysis of the development of the Karazhanbas field is presented, as well as the dynamics of the current and accumulated compensation for withdrawals by injection in the Northern area in recent years of development. The analysis of the presented indicators made it possible to conclude that with a decrease in the volume of steam injection into the reservoir, for the uniformity of oil production, it is necessary to consider the technology of using in-situ combustion in this area. The substantiation of the numerical method is given, which makes it possible to represent the formation of fields of pressure, temperature, saturation (oil, water and gas), concentrations of components (oxygen, water vapor and inert gas) when using in-situ combustion. Based on the qualitative behavior of the constructed dependences, one can trace the dynamics of the formation and evolution of zones characteristic of the process of in-situ combustion and draw a conclusion about the implementation of in-situ combustion in the Karazhanbas field.