Advanced vibroseismic technique for water flooded reservoir stimulation, mechanism and field tests results

Simkin, Elizabeth; Surguchev, M. L.

doi:10.3997/2214-4609.201411251

Cited by 15 publications

(10 citation statements)

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“…They also showed that this increase is only slightly due to ultrasonic heating. Simkin and Surguchev (1991) and Simkin (1993) pointed out that oil droplet size was increased after applying ultrasonic waves. This increase was attributed to coalescence of oil droplets because of Bjerknes forces under ultrasound.…”

Section: Introductionmentioning

confidence: 97%

A role of ultrasonic frequency and power on oil mobilization in underground petroleum reservoirs

Hamidi

Rafati

Junin

et al. 2012

J Petrol Explor Prod Technol

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Section: Introductionmentioning

confidence: 97%

A role of ultrasonic frequency and power on oil mobilization in underground petroleum reservoirs

Hamidi

Rafati

Junin

et al. 2012

J Petrol Explor Prod Technol

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“…This process was well explained earlier. Simkin & Surguchev (1991) and Simkin (1993) observed an increase in oil droplet size when continuous ultrasound was applied due to the primary Bjerknes forces. Such coalescence may assist the accelerating gravity phase separation within porous media and improve the relative permeability Figure 14.…”

Section: 2mentioning

confidence: 94%

“…Later, Kuznetsov et al (2002) reported an incremental oil recovery from vibration stimulated wells in Russia, and pointed out that a decreased water cut was caused by an increase in the relative permeability of oil and a decrease in water/oil interfacial tension (IFT). Simkin & Surguchev (1991) and Simkin (1993) observed an increase in oil-droplet size when continuous ultrasound was applied. This coalescence induced ultrasonically occurred due to the primary Bjerknes forces, which are the mutual reaction between pulsating bodies in liquid (Blake 1949).…”

Section: Introductionmentioning

confidence: 93%

Pore-scale investigation of immiscible displacement process in porous media under high-frequency sound waves

Naderi

Babadagli

2011

J. Fluid Mech.

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Although experimental and theoretical studies have been performed to identify the effects of elastic waves on multi-phase flow in porous structures, the literature lacks finely tuned experiments at the micro-scale. This paper reports observations and critical analysis of immiscible displacement in micro-scale porous media under ultrasonic energy. A number of experiments are performed on homogeneous and heterogeneous micromodels for varying wave frequency and power, initial water saturation, wettability and injection rates. We show that ultrasonic radiation influences the displacement pattern and yields lower residual non-wetting phase (oil) behind when low injection rates are applied. Higher wave frequency results in faster recovery of oil, but the ultimate recovery is controlled mainly by wave intensity. The presence of initial water saturation has a positive effect on the displacement, especially in an oil-wet medium. Of the possible mechanisms suggested for recovery enhancement under ultrasonic radiation, deformation of pore walls and change in fluid properties due to heating are not an issue in these experiments but other mechanisms including coalescence of oil droplets under oscillation, reduction of wetting films, adherence to grains and the peristaltic movement of fluids due to mechanical vibration were observed to be effective and are discussed in the analysis of the visual observations.

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“…Unfortunately, there are no micromodel experiments to date that visually demonstrate droplet coalescence in a porous medium due to Bjerknes forces. Simkin et al 38 demonstrated in a series of experiments that during elastic vibration, ultrasound is generated within oil-saturated core blocks, which accelerates the process of capillary imbibition. Schoeppel and Howard 43 treated various samples of crude oil-water emulsions with ultrasound, and observed a considerable acceleration in coalescence.…”

Section: Literaturementioning

confidence: 98%

Immiscible displacement of oil by water in consolidated porous media due to capillary imbibition under ultrasonic waves

Hamida

Babadagli

2007

The Journal of the Acoustical Society of America

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Numerous studies done in the last four decades have demonstrated that acoustic stimulation may enhance recovery in oil reservoirs. This technology is not only technically feasible, but also serves as an economical, environmentally friendly alternative to currently accepted enhanced oil recovery (EOR) method. It requires low capital expenditure, and yields almost immediate improvement without any additional EOR agents. Despite a vast body of empirical and theoretical support, this method lacks sufficient understanding to make meaningful and consistent engineering predictions. This is in part due to the complex nature of the physical processes involved, as well as due to a shortage of fundamental/experimental research. Much of what the authors believe is happening within acoustically stimulated porous media is speculative and theoretical. This paper focuses on the effects of ultrasound on the interfacial forces between immiscible fluids. Capillary (spontaneous) imbibition of an aqueous phase into oil (or air)-saturated Berea sandstone and Indiana limestone samples experiments were conducted. Solutions of water, brine (15,000 and 150,000 ppm NaCl), anionic surfactant (sodium dodecyl diphenyloxide disulfonate), nonionic surfactant (alcohol ethoxylate) and polymer (xanthan gum) were prepared as the aqueous phase. Both counter-current and co-current geometries were tested. Due to the intrinsically unforced, gentle nature of the process, and their strong dependence on wettability, interfacial tension, viscosity and density, such experiments provide valuable insight into some of the governing mechanisms behind ultrasonic stimulation.

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Advanced vibroseismic technique for water flooded reservoir stimulation, mechanism and field tests results

Cited by 15 publications

References 0 publications

A role of ultrasonic frequency and power on oil mobilization in underground petroleum reservoirs

A role of ultrasonic frequency and power on oil mobilization in underground petroleum reservoirs

Pore-scale investigation of immiscible displacement process in porous media under high-frequency sound waves

Immiscible displacement of oil by water in consolidated porous media due to capillary imbibition under ultrasonic waves

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