Suppressing fluid communication to or from a wellbore
A fluid communication, wellbore technology, applied in the direction of production fluids, wellbore/well components, drilling composition, etc., can solve the problems of complex and expensive completions
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[0038] see figure 1 , figure 1 The lower portion of the wellbore 1 extending from the surface (not shown) into the formation 4 is shown. In this example the strata are stratified. Layers 6 and 7 contain hydrocarbon oil and layer 8 contains water. Layers 6, 7, 8 are separated by boundary or impermeable layers 10, 11 . The wellbore 1 has a casing 14 consisting of a metal casing string, and the annulus 15 between the casing 14 and the wall of the wellbore 1 is filled with cement. The downhole completion is marked by tubing 16 and packers 18 extending to the surface.
[0039] The fluid enters the wellbore 1 from the layers 6, 7, 8 through the perforated holes 20, 21, 22 in the directions indicated by the arrows and is produced to the surface through the tubing 16. This fluid contains oil 23 and a large amount of water 24 which flows from layer 8 . There is a need to seal off the water flowing out of the aquifer 8, in particular through the perforations 21 formed at the int...
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