1. The following example shows that in some physical situations, non-uniqueness is natural and obvious, not pathological. Consider a water bucket with a hole in the bottom. If you see an empty bucket with a puddle beneath it, can you figure out when the bucket was full? No, of course not! It could have finished emptying a minute ago, ten minutes ago, or whatever. The solution to the correspondi...

The integrated injection-production string is the core tool used in thermal recovery wells for heavy oil, mechanical behavior of which complex due to coupling effect downhole temperature and pressure load induced by steam huff puff operations. In this paper, an analysis model that calculates field during operations has been established based on basic principles energy conservation heat transfer...

hydraulic conductivity variations around the boreholes in uniformly graded sands for cyclic water injection pressure have been evaluated by laboratory tests. prototype laboratory devices have been designed and constructed for this research. the cell has a capability to model the well, the boundary condition and to measure the hydraulic conductivity. while increasing water injection pressure, hy...

water injection is an enhanced oil recovery method which is applied for number of reservoirs especially in the offshore fields around the world. sea-water injection process is usually associated with important concerns affecting the efficiency, safety, and economy of the operation like formation damage, mineral scaling, early breakthrough and corrosion. incompatibility between injected and form...

in this research the experimental and theoretical studies on different enhanced oil recovery (eor) techniques, i.e. water flooding (wf), gas injection (gi) and water alternating gas process (wag) were performed on specimens taken from an iranian carbonate offshore reservoir at the reservoir condition. the experimental results for each specified techniques were compared with the corresponding re...

Compared with traditional injection tubular strings, the stresses on CO2 strings are more complex. The results from field applications show that phase transition of fluid in is an important factor calculation temperature distribution and analysis string mechanics. Therefore, we propose a strength method for considers transition. We selected four oil China as examples to evaluate their safety. F...