Determination of optimal oil reservoir for associated petroleum gas injection on the example of a field of the Gazprom neft company group

Abstract

Aim. The development of oil zones of oil and gas fields located in remote, hard-to-reach areas with no infrastructure is complicated by the problem of utilization of associated petroleum gas (APG). This problem arises most acutely during the development of narrow oil rim in oil and gas condensate fields with a massive gas cap. In such a case, there is a possibility of an abrupt increase in the gas-oil ratio due to gas breakthroughs to oil wells from the gas cap. A possible way to solve the problem of rational use of APG in such conditions is to form a field development system using the technology of gas injection into temporary underground storage facilities. For this purpose, it is required to justify facilities used for the APG injection to temporary reservoirs, which is the main goal of the study.
Materials and methods. Analysis of geological and geophysical information of the oil field and study of world experience [3] of gas injection to underground reservoirs. Forming of requirements and parameters of a reservoir influencing efficiency of the process of gas injection.
Results. A methodology for a comprehensive assessment of the reservoir geological parameters for gas injection has been developed. It allows to characterize all reservoirs of the field in terms of the possibility of their use for gas injection and to identify the most acceptable.
Conclusion. As a result of the analysis, it was found that the most promising reservoir at this field for temporary storing of a gas are the layers NP_2-3, NP₄ and YU_2-6.