Physical and chemical distinctions between natural gas and petroleum should suggest new exploration methods. Coals and black shales produce methane independent of oil. Both long- and short-range migrations provide gas segregation. Several examples of gas accumulation in apparently unlikely situations emphasize the need for revision in the p...
The Montney Formation in western Canada is an example of a tight-gas basin that conforms to the definition of an indirect basin-centred gas accumulation1, that is, a regionally pervasive, unconventional gas system in which migrated and trapped oil was thermally cracked to gas. Basin-centred ...
The buoyancy force leads to gravity segregation allowing upward movement of HCs along a ‘carrier bed’ from the source area to the trap (Rashid et al., 2012, Montel et al., 2007, Dodds, 2000). The existence of capillary imbibition leads to transport resistance and also results in the ...
The Central Mediterranean Route (CMR)—between the Libyan, Tunisian, Maltese and Italian search-and-rescue areas—is one of the most frequented and dangerous irregular migration routes, with a high number migrants drowning while attempting to cross each year1. As a result, the rescue of people...
But there is a tinge of regret in Aleck that doesn’t seem to touch the other Okies. He still dreams of what he didn’t get: a bigger house, a better chance. “I still suffer from all that segregation . . . being mistreated and denied jobs when I got older. And it all started ...
1. The asphalt migration will result in asphalt segregation along the depth of pavements with time. 有关调查表明,我国诸多高速公路沥青混凝土路面在使用过程中产生了沥青迁移现象。2) migration and diffusion of leachate 渗沥液迁移扩散3) migrabitumen 固体运移沥青 1. The solid migrabitumen of ...
Lower pressure-temperature in the upper Miocene and Pliocene reservoirs allowed phase segregation into gas and oil zones. Interbedded oil and gas resulted from multiple episodes of migration charging. Iterations of migration, fractionation and gas leakage enriched oils in an otherwise gas-rich basin....
The chapter briefly explains source rocks, expulsion from source rocks, secondary migration, migration rates and efficiencies, oil migration pathways, migration under hydrodynamic conditions, and segregation and change during migration and entrapment. For sedimentary rocks to serve as source rocks, they ...
As a consequence of tertiary migration, the reservoir fluids, water, oil and gas, tend to place themselves to a normal-gravitational position. Additionally, the dynamic pressure distribution at the end of the production history tends to relax, amplifying the migration process towards normal ...
In other words, when phase segregation occurs rapidly compared to the time scale studied, vertical equilibrium can be assumed, allowing for the use of specially adapted models. In the VE model, the equilibrium between brine and CO2 is pre-assumed at all times. Under this assumption, the ...