Current development trends of Russian oil industry are characterized by an increase in share of hard-to-recover reserves and the late stage of development of most existing fields. Solving the problem of maintaining oil production levels requires the search for effective and profitable technologies for enhancing oil recovery. One of the cheapest to implement technology related to hydrodynamic methods of enhanced oil recovery is cyclic waterflooding. Analysis of practical application results shows that cyclic waterflooding technology allows to increase oil production over the billing period by 3-6% compared with permanent waterflooding.
To date, a large number of theoretical and laboratory studies have been carried out aimed at determining applicability and planning technology use in field conditions. However, in modern conditions of large-scale hydrodynamic modeling of oilfield development processes as a way to develop recommendations for targeted impact on production facilities (formations, deposits and their sections), cyclic waterflooding modeling is unsystematic: approaches to selecting promising regions for applying the technology and substantiation of well operation modes have not been formalized. The earlier article provides an algorithm for constructing a map of the applicability of cyclic waterflooding, which shows promising objects and areas for implementing the technology, as well as wells for switching to a cyclic mode of operation. This article provides an algorithm to justify half-cycle duration of injection wells taking into account specific geological and physical characteristics of reservoir and field-technological features of wells operation.
References
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