Continuous Monitoring of Thermal EOR at Schoonebeek for Intelligent Reservoir Management

Hornman, Kees; Popta, J. van; Didraga, C.; Dijkerman, H..

doi:10.2118/150215-ms

Cited by 14 publications

(5 citation statements)

References 2 publications

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“…The source and receiver lines are located such that they are right above the point where the two observation wells intersect the reservoir. J.C. Hornman et al (2012) and J. Cotton et al (2012) showed that quantitative time shifts and qualitative amplitude variations, calculated by crosscorrelation on the seismic data, fit with the observation, production and injector well data.…”

Section: Introductionmentioning

confidence: 75%

4D Seismic Inversion on Continuous Land Seismic Reservoir Monitoring of Thermal EOR

Michou¹,

Lafet²,

Coléou³

et al. 2013

London 2013, 75th Eage Conference en Exhibition Incorporating SPE Europec

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A permanent reservoir monitoring system has been installed for Shell at the end of 2010, on a medium heavy-oil onshore field situated in the north-east of The Netherlands, in the context of re-development of oil production by Gravity Assisted Steam Flood. The first challenge was to continuously monitor, with seismic reflection, the lateral and vertical expansion of the steam chest injected in the reservoir during production over more than a year. As the 4D seismic attributes obtained from monitoring fit the measurements made at observation, production and injector wells, the 2D monitoring system was extended to 3D in April 2012. The second challenge was quantify seismic amplitude variations in terms of petro-acoustic parameters. For that purpose 4D inversion was performed on continuous 2D and 3D seismic monitoring data in order to quantify the lateral and vertical expansion of the steam chest on a daily basis. The 4D inversion results not only point out that the inversion enables to quantify the 4D effects in terms of P-impedance variations, but also greatly improves the vertical location of these events. Moreover, the percentage of maximum impedance variations and the thickness where these variations are observed are in good agreement with the petro-elastic model.

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Section: Introductionmentioning

confidence: 75%

4D Seismic Inversion on Continuous Land Seismic Reservoir Monitoring of Thermal EOR

Michou¹,

Lafet²,

Coléou³

et al. 2013

London 2013, 75th Eage Conference en Exhibition Incorporating SPE Europec

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show abstract

“…As explained by Hornman et al . (), the travel‐time variations depend on pressure, temperature, gas saturation, and steam. All of these parameters can have constructive or destructive effects.…”

Section: Discussionmentioning

confidence: 99%

Using slowness and azimuth fluctuations as new observables for four‐dimensional reservoir seismic monitoring

Cacqueray

Roux

Campillo

2015

Geophysical Prospecting

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Four‐dimensional imaging using geophysical data is of increasing interest in the oil and gas industries. While travel‐time and amplitude variations are commonly used to monitor reservoir properties at depth, their interpretation can suffer from a lack of information to decipher the parts played by different parameters. In this context, this study focuses on the slowness and azimuth angle measured at the surface using source and receiver arrays as complementary observables. In the first step, array processing techniques are used to extract both azimuth and incidence angles at the source side (departure angles) and at the receiver side (arrival angles). In the second step, the slowness and angle variations are monitored in a laboratory environment. These new observables are compared with traditional arrival‐time variations when the propagation medium is subject to temperature fluctuations. Finally, field data from a heavy‐oil permanent reservoir monitoring system installed onshore and facing steam injection and temperature variations are investigated. The slowness variations are computed over a period of 152 days. In agreement with Fermat's principle, strong correlations between the slowness and arrival‐time variations are highlighted, as well as good consistency with other techniques and field pressure measurements. Although the temporal variations of slowness and arrival time show the same features, there are still differences that can be considered for further characterization of the physical changes at depth.

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“…With such a buried continuous-monitoring system we have been able to track reliably, and in real time, very small reservoir changes (time shifts of a few microseconds; Hornman et al, 2012, Hornman andForgues, 2013). However, the cost of the system is an order of magnitude too high to be attractive for wide-spread application onshore.…”

Section: Onshorementioning

confidence: 99%

Frequent Seismic Monitoring for Pro-Active Reservoir Management

Mateeva

Hornman

Hatchell

et al. 2015

SEG Technical Program Expanded Abstracts 2015

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Beyond exploration, the most important role for geophysics in the oil and gas industry is to influence field operations, so that the value of existing assets is fully realized. The recent trend in time-lapse seismic has been toward very frequent reservoir monitoring, with the aspiration to optimize both near-and long-term field management. In this paper we describe steps taken by Shell to tackle the main challenges of frequent seismic monitoring -cost, intrusiveness, and value realization. Offshore, cost reductions can be achieved through novel types of receivers and more efficient vessel utilization. Onshore, cost and footprint reductions are sought through novel survey designs, including fiber-optic DAS cables, sparse geometries, and movable subsurface sources. A demonstration of value is currently pursued through a large onshore trial of continuous monitoring of steam injection at Peace River, Canada, active since 2014. Initial results indicate that steam non-conformance can be diagnosed, remediation actions taken, and their effectiveness evaluated. Inter-disciplinary collaboration is a must. The associated workflow for assimilating frequent seismic data continues to develop and should benefit future monitoring projects both onshore and offshore. Offshore SEG New Orleans Annual Meeting

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Continuous Monitoring of Thermal EOR at Schoonebeek for Intelligent Reservoir Management

Cited by 14 publications

References 2 publications

4D Seismic Inversion on Continuous Land Seismic Reservoir Monitoring of Thermal EOR

4D Seismic Inversion on Continuous Land Seismic Reservoir Monitoring of Thermal EOR

Using slowness and azimuth fluctuations as new observables for four‐dimensional reservoir seismic monitoring

Frequent Seismic Monitoring for Pro-Active Reservoir Management

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