Deep Electromagnetic Reservoir Mapping While Drilling Technology Application for Eastern Siberia Horizontal Exploration Well

摘要

The paper describes application of deep electromagnetic reservoir mapping while drilling technology utilized in horizontal exploration well within Eastern Siberia region.Challenging geological environment including structural uncertainty,possible tectonics affect and lack of drilled wells in area required new solutions implementation.Extended logging-while-drilling measurements were selected to maximize reservoir data for further field development plan.Another requirement was to properly place the borehole within target producing interval to initiate early production.As a result reservoir mapping technology showed capability to map formation boundaries-simultaneously the top and the bottom with maximum depth of detection 23 mTVD.The information received helped to understand reservoirs behavior,place the borehole safely in a target zone and update geological and seismic model in explored area.Additional measurements while drilling allowed to calculate petrophysical parameters of the formation based on triple combo while drilling measurements and some extra logging after drilling.Based on robust logging measurements,formation evaluation parameters along with permeability were tuned to formation pressure points data in pilot hole.Logging study of petrophysical results along with mapping tool data helped to make conclusions about lateral changes of different type of reservoirs within of one target formation.