Considerations on Pre-Production of Injection Wells

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Abstract:

One of the main drawbacks of a classical material balance model, applied in the analysis of oil reservoir development, is a single pressure in all elements of the reservoir system. This is especially important for reservoirs with bottom water, with active aquifer zones, as well for waterflooded reservoirs.

This article describes a mathematical model that includes three functional elements of a reservoir system (zone) with individual reservoir pressure maintained in each element. The model balance equations predict the behavior of a reservoir system for a given flow and reservoir properties; it can also solve an inverse problem.

The actual reservoir development parameters allows restoring the elastic capacity of the zones, as well as flow conductivities between these zones. The presented model predicts a reservoir’s engineering parameters for various producer-to-injector ratios. A retrospective analysis has shown a recommended development strategy for the reservoir development (from the very beginning).

References:

1. Sitnikov A. N., Pustovskikh A. A., Roshtekayev A. P., Andzhukaev Ts. V. 2015. “Metod opredeleniya optimalnogo vremeny otrabotli nagnetatelnykh skvazhin” [Method for Defining the Optimal Time for Injection Well Pre-Production]. Oil Industry, vol. 3, pp. 84-87.
2. Khasanov M. M., Krasnov V. A., Korotovskikh V. A. 2007. “Opredelenie optimalnogo perioda otrabotki nagnetatelnoy skvazhiny na neft” [Defining the Optimal Period of Injection Well Pre-Production]. Rosneft Scientific and Technical Bulletin, vol. 5, pp. 19-22.