Perm Journal of Petroleum and Mining Engineering (Mar 2020)
Enhancing the efficiency of gas-oil (oil-gas) deposits development based on selection of optimal engineering solutions for Perm Region fields
Abstract
Development of oil, gas and gas-condensate fields, with commingled fluid extraction at some of them, is the specifics of hydrocarbons production in Perm Region. Reserves of free gas and gas caps occur at every fifth field under development in Perm Region. There are conditions for implementing combined multifunctional technologies at the interface of liquid and gaseous fluid development. At the same time, transformation of a pseudo-negative factor - gas presence - into a positive vector can significantly enhance the efficiency of hydrocarbon resources development. An integrated approach to effective development of oil and gas deposits is considered in the article. Geological and technological features of oil and gas deposits, such as the type of oil and gas deposit, the ratio of gas and oil reserves, the type of reservoir, the mobility of oil reserves, the permeability anisotropy ratio and the water drive strength, were taken into account. Considerable attention was paid to working agents. The authors have analysed various technologies and technical solutions being implemented: formation pressure maintenance system (water, gas), water-alternating-gas injection (injection of water-gas mixture and fine water-gas mixture), gas lift, and barrier water-flooding. In this case, the emphasis was made on active development system. As a result, suggestions on the enhancement of the oil and gas deposits development efficiency have been offered, subject to geological and technological features. As an example of implementing an integrated approach using active gas energy technologies, an oil and gas facility at a Perm Region field was examined. The current state was analysed and the main development issues were identified. Recommendations on the commingled development of the gas cap and oil rim subject to the gas-oil contact immobility and the application of fine water-gas mixture injection technology are provided.
Keywords
