of the following statements conceming Higgins and Leighton streamtube model is n
ID: 1732680 • Letter: O
Question
of the following statements conceming Higgins and Leighton streamtube model is not true? for calculating the perfiomance of a streamtube, the tube is divided into n blocks of equal volume In The ratio average length ofablock to its average cross sectional area is referred to as the shape factor. between injection and production well. Tha displacement within a streamtube is simuilated by advancing the flood front from one block to the next Flow rate in each tube is calculated from the knowiledge of total fluid mobility in each block and the pressure difference None of the above. )Which of the following statements concerning CGM model is not true? CGM model combines the concepts of areal sweep development with Buckley Leveret model of linear displacement. It uses the Buckley leveret model by defining equivalent pore volumes injected in the swept zone. CGM model does not account for the change of injectivity during the flood. Empirical correlations are used to estimate the The areal sweep after breakthrough is calculated from areal sweep at breakthrough and the ratio ofvolume ofwater injected currently to volume of water injected up to breakthrough areal sweep at breakthrough. Which of the following statements concerning use of tracers in injection water is not true? Tracer chemicals must be non-native to the reservoir. Tracer chemicals must not adsorb on or react with the reservoir rock. The speed of tracer propagation from injector to the producer provides a measure of volumetric sweep. In a five spot pattern flood, if most of the tracer injected in a well is recovered from one of the four surrounding production well, it indicates good sweep performance. None of the above. of the following statements concerning injection and production well operations is not true? In waterflooding, production wells are usually operated at near atmospheric bottom-hole pressures. Profile modification b plugging off watered out layers is successful only when such layers are isolated from other layers. The bottom-hole pressure in injection wells must be kept below a threshold value that depends largely on the depth ofth formation. Profile modification works better in wells that have open-hole completion. None of the above. Which J J nir simulation models is not true?Explanation / Answer
1. None of the above.
2. CGM model does not account for the change of injectivity during the flood.
3. None of the above.
4. Profile modification works better in wells that have open-hole completion.
(The best well pattern is thin and poor reservoir is the five-spot pattern)
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