Print this pageAAPG GEO 2010 Middle East
Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain
Sidetracks Drilling Supported by Hydrodynamical Models of Reservoir
(1) Department of service projects, Roxar, Moscow, Russian Federation.
(2) Reservoir modelling, TNK-BP Nizhnevartovsk, Nizhnevartovsk, Russian Federation.
In our report we present full cycle of reservoir modelling ending with targets for sidetrack drilling.
Many giant oil fields in Siberia started from 70s and still produce more than 1 mln sbl/day. These oil fields are covered by the net of the wells and experience the fast watering of the wells. The operators find sidetrack drilling is a profound way to decrease the drilling costs and to slow down the watering. However, after 40 years of exploitation successful sidetracks in the reservoir require thorough analysis of geology and production. As a service software company Roxar cooperates with operators closely in order to find the best targets for sidetracks. We build a hydrodynamical models of reservoir sector with 100-200 wells of 20-40 years of exploitation. It takes about 2-3 months to make history matching of the model. With matched model we get up-to-date and detailed picture of reservoir. Analysis of pressure, mobile reserves and other parameters from the model brings to the precise targets of sidetrack. In practice the model covering 20-50km2 gives immediate solution for 4-10 sidetracks.
Firstly we present the typical situations on the oil-field in Siberia and the contribution of modelling to the production process. Next we present the results of sidetracks released after 3D modelling. We demonstrate the whole cycle of modelling on examples from our project with TNK-BP, Samotlor oil field. We compare the real production of sidetracks and our forecasts whose had initiated their drilling. Other problems of reservoir engineering like boundaries of sector models, reservoir pressure matching, implementing hydrofractures into the model and so on are also discussed.