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Identidad U.N.Generating synthetic well logs by artificial neural networks
- Details
- Written by Grupo de Investigación en Geomecánica Aplicada
Well logs acquired directly in the field are one of the most key engineering elements to evaluate hydrocarbon formations. Nevertheless, some technical troubles related to the unfolding of tools, the operational states of the well and many other reasons may sharply limit the carrying out of an optimal formation characterization methodology along the entire productive or injective lifespan of a reservoir. Nowadays, artificial neural networks (ANN) are one of the strongest tools to supply such missing information in order to generate synthetic logs.
Modeling of massive sand production during cold heavy oil production
- Details
- Written by Grupo de Investigación en Geomecánica Aplicada
Cold Heavy Oil Production with Sand (CHOPS) is a single well technology for extracting heavy oil where sand flow is used as an enhancing way of the oil well productivity. CHOPS is a massive sand production strategy that responds to foamy oil behavior and wormhole formation, both consequences of geomechanical aspects such as elastoplastic behavior, in-situ stress state redistribution and sand liquefaction that generate a complex multiphase fluid flow (oil, gas, water and sand). Sand grains are removed from solid matrix due high pressure drawdown, but if this is great enough to destroy the internal binding forces of sand particles, sand tends to produce together with oil, thus forming wormholes. Wormhole is a space or cavity in the formation that continually increases in size and creates regions of enhanced permeability and porosity which contribute to higher oil productivity. CHOPS is an attractive and profitable alternative to the exploitation of heavy oil reservoirs around the world, especially in Latin America. Understanding geomechanical aspects such as elastoplastic behavior, stresses redistribution and sand liquefaction is relevant to model sand production during cold heavy oil production. Modeling will also help to analyze how to increase the recovery factor under geomechanical stability conditions and to reduce operational costs of heavy oil reservoirs production by this technology.
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