Harmonic pulse testing for well performance monitoring

Fokker, P.A.; Borello, Eloisa Salina; Verga, Francesca; Viberti, Dario

doi:10.1016/j.petrol.2017.12.053

Cited by 20 publications

(25 citation statements)

References 34 publications

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“…It should be pointed out that a longer pulse oscillation period T f allows for a better description of the spectrum at low frequencies, which could significantly improve the interpretation. This is related to the increasing reservoir investigation radius with longer times (Fokker et al, ):

r_{i} = 1.5 \sqrt{\frac{k T_{normalf}}{2 πμ c_{t} ϕ}}

…”

Section: Injection Testing and Hptmentioning

confidence: 99%

“…Fokker et al () presented a more general approach by following the practice of type curve matching developed in conventional well testing and allowing a more straightforward determination of permeability, skin, wellbore storage, and reservoir boundary characteristics. In the present contribution, we target the validation of the technology as a monitoring tool during a real stimulation treatment.…”

Section: Introductionmentioning

confidence: 99%

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Harmonic Pulse Testing for Well Monitoring: Application to a Fractured Geothermal Reservoir

Borello

Fokker

Viberti

et al. 2019

Water Resources Research

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Harmonic Pulse Testing (HPT) has been developed as a type of well testing applicable during ongoing field operations because a pulsed signal is superimposed on background pressure trend. Its purpose is to determine well and formation parameters such as wellbore storage, skin, permeability, and boundaries within the investigated volume. Compared to conventional well testing, HPT requires more time to investigate the same reservoir volume. The advantage is that it does not require the interruption of well and reservoir injection/production before and/or during the test because it allows the extraction of an interpretable periodic signal from measured pressure potentially affected by interference. This makes it an ideal monitoring tool. Interpretation is streamlined through diagnostic plots mimicking conventional well test interpretation methods. To this end, analytical solutions in the frequency domain are available. The methodology was applied to monitor stimulation operations performed at an Enhanced Geothermal System site in Pohang, Korea. The activities were divided into two steps: first, a preliminary sequence of tests, injection/fall-off, and two HPTs, characterized by low injection rates and dedicated to estimate permeability prior to stimulation operations, and then stimulation sequence characterized by a higher injection rate. During the stimulation operations other HPT were performed to monitor formation properties behavior. The interpretation of HPT data through the derivative approach implemented in the frequency domain provided reliable results in agreement with the injection test. Moreover, it provided an estimation of hydraulic properties without cessation of stimulation operations, thus confirming the effectiveness of HPT application for monitoring purposes.

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r_{i} = 1.5 \sqrt{\frac{k T_{normalf}}{2 πμ c_{t} ϕ}}

…”

Section: Injection Testing and Hptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Harmonic Pulse Testing for Well Monitoring: Application to a Fractured Geothermal Reservoir

Borello

Fokker

Viberti

et al. 2019

Water Resources Research

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show abstract

“…A harmonic test is characterized by a periodic sequence of alternating production or injection rates that can be imposed after a long shut-in of the tested well, similar to conventional well testing, or can be superposed to ongoing production, minimizing or avoiding economic losses. Furthermore, it offers the advantage of not requiring the initial static pressure nor the previous production history of the well to be known [43] and it is particularly sensitive to lateral/vertical variations of rock properties. The second most interesting unconventional methodology is injection testing.…”

Section: Well Testingmentioning

confidence: 99%

What’s Conventional and What’s Special in a Reservoir Study for Underground Gas Storage

Verga

2018

Energies

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Abstract:The development of an underground gas storage (UGS) project and its subsequent management must ensure technical feasibility, commercial value and long-term efficiency. The UGS industry has borrowed much of its knowledge from other disciplines (primarily oil and gas reservoir engineering), but it has also developed its own technology. This paper provides a methodological approach based on current practices and available methods for designing and safely operating a UGS (including the so-called "delta-pressure" option to enhance UGS performance) and highlights what is special in UGS compared to oil and gas reservoirs.

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“…A harmonic test is characterized by a periodic sequence of alternating production or injection rates that can be imposed after a long shut in of the tested well, similar to conventional well testing, or can be superposed to ongoing production, minimizing or avoiding economic losses. Furthermore, it offers the advantage of not requiring the initial static pressure nor the previous production history of the well to be known [41] and it is particularly sensitive to lateral/vertical variations of rock properties. The second most interesting unconventional methodology is injection testing.…”

Section: Well Testingmentioning

confidence: 99%

What’s Conventional and what’s Special in a Reservoir Study for Underground Gas Storage

Verga¹

2018

Preprint

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Harmonic pulse testing for well performance monitoring

Cited by 20 publications

References 34 publications

Harmonic Pulse Testing for Well Monitoring: Application to a Fractured Geothermal Reservoir

Harmonic Pulse Testing for Well Monitoring: Application to a Fractured Geothermal Reservoir

What’s Conventional and What’s Special in a Reservoir Study for Underground Gas Storage

What’s Conventional and what’s Special in a Reservoir Study for Underground Gas Storage

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Harmonic pulse testing for well performance monitoring

Cited by 20 publications

References 34 publications

Harmonic Pulse Testing for Well Monitoring: Application to a Fractured Geothermal Reservoir

Harmonic Pulse Testing for Well Monitoring: Application to a Fractured Geothermal Reservoir

What’s Conventional and What’s Special in a Reservoir Study for Underground Gas Storage

What&rsquo;s Conventional and what&rsquo;s Special in a Reservoir Study for Underground Gas Storage

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What’s Conventional and what’s Special in a Reservoir Study for Underground Gas Storage