Visualization of space competition and plume formation with complex potentials for multiple source flows: Some examples and novel application to Chao lava flow (Chile)

Fluid displacement in a continuum pressured by a variable constellation of source flows can be visualized as solutions of line integrals. The algorithms are based on complex potentials that provide exact solutions of the Navier-Stokes equation and allow users to specify both the location and flux strength of multiple sources. If relative...

Closure of open wellbores in creeping salt sheets

Safe exploration and production of pre-salt (or subsalt) hydrocarbons require that drilling operations be optimized. We introduce analytical models of wellbore closure, accounting for variations in both the wellbore net pressure and far-field flow rate of an autochthonous or allochthonous salt sheet penetrated by the wellbore. We demonstrate how...

Editorial: Introduction to Energy Strategy Reviews theme issue “Nuclear energy today & strategies for tomorrow”

Finding the optimum energy supply system is one of the aims of energy strategy research and nuclear energy is a much debated real option. Proponents of nuclear energy argue that there are no technologies without risks and that nuclear power is needed for meeting growing energy demand in the emerging economies to fuel their industrialization and...

Geomechanics of fracture caging in wellbores

This study highlights the occurrence of so-called ‘fracture cages’ around underbalanced wellbores, where fractures cannot propagate outwards due to unfavourable principal stress orientations. The existence of such cages is demonstrated here by independent analytical and numerical methods. We explain the fracture caging mechanism and pinpoint the...

Editorial: Introduction to Energy Strategy Reviews theme issue “Future Energy Systems and Market Integration of Wind Power”

Energy Strategy Reviews (ESR) provides a peer-reviewed publication platformto evaluate strategy options for tomorrow’s energy systems. The focus in this special issue is on “Future Energy Systems and Market Integration of Wind Power” and possible solutions are highlighted from the strategy viewpoint while addressing key technology components....

Editorial: Introduction to Energy Strategy Reviews theme issue “European Energy System Models”

Energy matters - we are all reminded on a daily basis. It commonly involves important and costly strategic choices. How then can we make today the best choices for tomorrow’s energy systems? Making optimum energy system decisions is a continuous learning curve. Energy Strategy Reviews (ESR) aims to be a leading publication platform in this...

Shale gas assets: Overpriced or a liquid turn for mining giant BHP?

Review of models and actors in energy mix optimization – can leader visions and decisions align with optimum model strategies for our future energy systems?

Organizational behavior and stakeholder processes continually influence energy strategy choices and decisions. Although theoretical optimizations can provide guidance for energy mix decisions from a pure physical systems engineering point of view, these solutions might not be optimal from a political or social perspective. Improving the...