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Three PanTerra delegates will be at OGWA this week. They will be ready to greet you at our booth #3351 or after their presentations at the OGWA Industry Showcase Theater.
Marten Buijse will be talking about Chemical EOR experiments with live crude oil. Why bother? today between 13.00-13.20.
Most chemical EOR experiments in the laboratory are performed using dead (degassed) crude oil. And for screening and selection of chemicals and for the design of a (near) optimum formulation this is fine. However, in a later stage of the design process experiments with live crude oil, in particular surfactant phase behavior tests and core flow tests will still be necessary to fine-tune the final formulation. For example, the optimum salinity, the IFT and the oil viscosity will all be different when using live crude oil. Experiments with live crude oil are more complex (because of the gas phase) and require special, high pressure, equipment. In this presentation the difference between dead and live crude oil experiments will be discussed in the context of chemical EOR.
Yesterday, OGWA attendees have listened to he presentation given by Hamidreza Salimi regarding an Optimum EOR Strategy for a Heavy Oil Reservoir with Depth-Variable Compositions and Oil Properties.
The objectives of this study were to build a compositional dynamic model for a heavy-oil reservoir with depth-variable oil properties and to find an optimum EOR strategy for that reservoir. The existing PVT data were reviewed. A proper compositional PVT model such that the variation of oil properties versus depth is properly captured was developed using the theory of non-isothermal reservoirs. The compositional PVT model calculates API 20° and live-oil viscosity 14 cP in the shallow part and API 12° and live-oil viscosity 350 cP in the deep part of the reservoir. For IOR/EOR screening, the performance of water injection, hydrocarbon-gas injection, CO2 injection, water-alternating-CO2 injection, polymer injection, polymer-alternating-CO2 injection, and simultaneous polymer and CO2 injection was evaluated using a large number of scenarios. For simultaneous polymer and CO2 injection, polymer was injected at the top while CO2 was injected at the bottom. The simulation runs of these scenarios were elucidated in detail. At the crest scale, combined CO2-polymer scenarios can increase the do-nothing developed reserve by 85-119%.