Processing 8 Wells DAS 3D VSP from South of Oman

Al-Abri, S.

doi:10.3997/2214-4609.201412203

Cited by 4 publications

(1 citation statement)

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“…That was recently demonstrated in a join Shell-PDO project in South Oman where 3D VSP had been previously deemed the only technically-feasible solution for seismic monitoring under complex, changing overburden. A record 8-well 3D VSP (Alabri, 2015) was acquired with Vibroseis and fiber-optic cables strapped to tubing in observation wells (numerous and relatively inexpensive in that field). Cable on tubing, instead of behind casing, is cheaper, retrofittable and replaceable, while still providing useable-quality DAS data.…”

Section: Frequent Seismic Monitoring For Pro-active Reservoir Managementmentioning

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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Section: Frequent Seismic Monitoring For Pro-active Reservoir Managementmentioning

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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A Literature Review

Li¹,

Karrenbach²,

Ajo‐Franklin³

2021

Geophysical Monograph Series

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Monitoring IOR/EOR Onshore with Frequent Time-Lapse Seismic - Status and Survey Adaptations for the Middle East

Mateeva

Hornman

Grandi

et al. 2016

Day 2 Tue, March 22, 2016

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IOR/EOR stimulation is a complex process that requires frequent areal monitoring to optimize recovery. On-demand seismic surveys are a suitable solution if cost, quality, environmental, and efficiency conditions are met. In this paper, we discuss the state of the art. We show that frequent buried seismic has the necessary quality and was able to add value to steam injection operations at a heavy oil field in Canada. However, in its current form, buried seismic is too expensive and intrusive. That is why, for future deployments, we seek cost and footprint reductions through judicious reduction of survey frequency (from days to weeks or months apart) and novel survey designs such as a buried cross-spread with Distributed Acoustic Sensing (DAS) receivers and movable subsurface sources. We are in the process of maturing the buried cross-spread solution. Its application to some extreme settings found in the Middle East (deep reservoirs with weak seismic expression under thick and complex overburden) is expected to be challenging. A promising alternative already available is 4D VSP with DAS in multiple wells. This solution requires sufficient surface access, fiber optic cables in wells, and skillful seismic processing.

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Processing 8 Wells DAS 3D VSP from South of Oman

Cited by 4 publications

References 0 publications

Frequent Seismic Monitoring for Pro-Active Reservoir Management

Frequent Seismic Monitoring for Pro-Active Reservoir Management

A Literature Review

Monitoring IOR/EOR Onshore with Frequent Time-Lapse Seismic - Status and Survey Adaptations for the Middle East

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