2D Well Testing with Smart Plug Sensor
a smart plug and well technology, applied in the direction of survey, wellbore/well accessories, construction, etc., can solve the problems of one dimensional characterization, not homogeneous in quality, and really useful to a reservoir engineer
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[0042]A vertical test well penetrating a three layer formation as shown in FIG. 5 is constructed and pressure measurements are taken using the apparatus and method of the invention.
[0043]The welltest consists of flowing layer 3 at 2000 bl / d for 24 hours followed by 48 hours of build up. The pressure response is recorded at the wellbore by gauge 53 and within the formation layers 1 and 2 by monitoring gauges 51 and 52 respectively.
[0044]An analytic model is built to have the characteristics shown in Table 1.
TABLE 1Forward model values of test wellLayer #Thickness(ft)kh (mD)kz (mD)Skin1357010—220354—350150200.5
[0045]The model is first run in a forward mode to simulate the pressure responses in the well bore and at the two monitoring gauges. The results are shown in FIG. 6.
[0046]A non-linear regression routine is used to match the pressures transient that are previously established and to recover the individual layer permeabilities along the horizontal and vertical directions (kh, kz)....
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