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Combined Cost-effective Seismic Monitoring Technology for a Shallow Heavy Oil Reservoir Driven by SagdNormal access

Authors: A.V. Stepanov, D.K Nurgaliev, M.A Amerkhanov, A.V Golovtsov, R.F Gimazev, M.R Lyabipov and S.A Usmanov
Event name: Geomodel 2018
Session: Нетрадиционные месторождения углеводородов
Publication date: 10 September 2018
DOI: 10.3997/2214-4609.201802393
Organisations: EAGE
Language: Russian
Info: Extended abstract, PDF ( 621.48Kb )
Price: € 20

Summary:
In case of shallow deposits of heavy oil deploying and exploitation of known high-resolution seismic monitoring system of SAGD based on permanently buried sources and receivers like SeisMovieTM essentially raise a cost of investigations and lead to unprofitable production. The purpose of experiments was to develop a cost-effective seismic monitoring technology for a shallow heavy oil reservoir driven by SAGD. A combined surface-borehole monitoring system was developed. It consisted of a network of measuring wells and sparse grid of seismic profiles. Heat-resistant geophones were permanently buried in wells below the reservoir. Profiles were oriented across a SAGD-wells through a dome of oil trap. At least one profile need to plan for every group of unidirectional SAGD-wells. To control seasonal variations of near surface elastic properties of formation a surface low channel geophone array centered relative to the wellhead was used upon survey. The monitoring system was deployed at one of oil sand bitumen reservoir within Cheremshan-Barstrick group of heavy oil fields, Tatarstan (Russia). Field experiment included base and one monitor surveys performed during the year. The interpretation based on time lapse direct transmitted and reflected P-waves inversion was used to determine temperature changes in reservoir conditions caused by steam injection.


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