Process Design of Cyclic Water Flooding by Real-Time Monitoring

Abstract

The gradual decline in the oil production rate of water flooded reservoirs leads to decrease in the profit of water flooding system. Although cyclic water injection (CWI) was introduced to reduce the descending trend of oil production in water flooded reservoirs, it must be optimized based upon the process parameters. The objective of this study is to develop all process design criteria based upon the real-time monitoring of CWI process in a naturally fractured reservoir having five producing wells and five injector wells completed in an Arab carbonated formation containing light crude oil (API = 42 deg). For this aim, a small pilot oil field was selected with water injection facilities and naturally producing oil wells and all data were collected from the field tests. During a five years' field test, the primary observations at the onset of shutdown periods of the water injection system revealed a repeatable significant enhancement in oil production rate by a factor of plus 5% leading us to assess the application of CWI. This paper represents the significant parameters of pressure and productivity affected during CWI in naturally fractured carbonate reservoirs based upon a dual porosity generalized compositional model. The results hopefully introduce other oil producer companies to the potential of using CWI to increase oil production in conventional water injection systems. The results also outline situations where such applications would be desirable.

Parameter Optimization of Asynchronous Cyclic Waterflooding for Horizontal–Vertical Well Patterns in Tight Oil Reservoirs

“…In the same year, Kobra Pourabdollah used the real-time monitoring data of cyclic waterflooding to optimize the injection time and shut-in time of cyclic waterflooding based on the dual-porosity generalized component model. 40 However, to the best of our knowledge, very limited research on parameter optimization of asynchronous cyclic waterflooding for the horizontal–vertical well pattern is available currently.…”

“…Results further verified that asymmetric cyclic waterflooding exhibits a better performance on the formation energy supplementation in the horizontal–vertical well pattern than symmetric cyclic waterflooding. In the same year, Kobra Pourabdollah used the real-time monitoring data of cyclic waterflooding to optimize the injection time and shut-in time of cyclic waterflooding based on the dual-porosity generalized component model . However, to the best of our knowledge, very limited research on parameter optimization of asynchronous cyclic waterflooding for the horizontal–vertical well pattern is available currently.…”

Effect of Well Orientation on Oil Recovery from Waterflooding in Shallow Green Reservoirs: A Case Study from Central Africa

“…The oil and gas industry has witnessed an upsurge in measures aimed at increasing the oil recovery from green reservoirs [2][3][4]. As part of these initiatives, waterflooding has been widely adopted as the cheapest form of recovery [5][6][7][8][9][10]. However, different factors affect the overall performance of this method [11][12][13], including the structural setup of the reservoir and well type [14,15].…”

Mechanisms and capacity of high-pressure soaking after hydraulic fracturing in tight/shale oil reservoirs

“…However, if the well spacing is larger, the producers are not responding under a very high injection pressure (Song and Yang 2013;Kong et al 2016;Mansour et al 2017). Conversely, if the well spacing is smaller, water channels faster to the producers through the hydraulic fractures (Thomas et al 2014;Li et al 2015;Pourabdollah 2018). Consequently, huff-n-puff by fracturing fluids or produced water has been tested in several tight oil pilots, and positive effects have been achieved (Li et al 2015;Li 2015;Tuero et al 2017).…”