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A case study shows when water cut is 100%, the volumetric sweep efficiency calculated with Zhang's water drive characteristic curve is 99.7%, and that calculated with Sipachev's water drive characteristic curve is 100%, which proves that the method with Zhang's water drive characteristic curve can more accurately reflect the actual field situation, and is more rational.
The results showed that the new water drive characteristic curves are more accurate than conventional water drive characteristic curves after A type and B type water drive curves rise, and can be used to predict production performance at ultra-high water cut stage, ultimate recovery efficiency and recoverable reserves.
Two new water drive characteristic curves at the ultra-high water cut stage (fw>90%) were derived by combining the new oil-water relative permeability ratio expression and reservoir engineering method.
Then, the numerical simulation results of five-point well pattern and production data of Yangerzhuang Oilfield and Liuzan Oilfield were used to verify the adaptability of the new water drive characteristic curves.
Water drive characteristic curve can reflect the trend of future production.
According to Luo Chengjian's research on water drive characteristic curve and reasonable injection production ratio, water cut and cumulative water production are predicted by water drive characteristic curve in this study.
Similar(48)
Using a counterbalanced design, the simulated driving performance of 25 experienced and 22 inexperienced drivers was tested under the nine different drug conditions in an arterial driving environment during which workload was varied through the drive characteristics as well as through the inclusion of a secondary task.
It is shown that proper gear train configurations associated with the inner structure matrix can be determined by the given inertia characteristics of primary links, while those associated with the outer structure matrix can be determined from the unidirectional drive characteristics of the RBR mechanism.
In other words, the best of both front- and rear-wheel drive characteristics, with chassis dynamics unlike anything else on the road.
The car is also rear-wheel drive, lest we forget to mention, meaning it should deliver very good drive characteristics, unlike a lot of supposedly sporty, present-day Pontiacs that are built on old/inferior GM front-drive chassis.
Although the E320 is a two-wheel drive car (this time the power goes to the back wheels), it's exceedingly well balanced, with sharp drive characteristics at all speeds.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com