pressure drawdown

pressure drawdown

[′presh·ər ‚drȯ‚dau̇n]
(petroleum engineering)
The drop in reservoir pressure related to the withdrawal of gas from a producing well; for low-permeability formations, pressures near the wellbores can be much lower than in the main part of the reservoir; leads to pressure decline in the reservoir and ultimate pressure depletion.
References in periodicals archive ?
The water rates are approximately double those achieved when compared to the same stage of pressure drawdown for the previous pilot configuration of Glenaras 10L and 12L.
Portland oil has continued to be produced at over 220 barrels a day, through a modest pressure drawdown.
The flow rate was restricted with limited pressure drawdown and each zone was shut-in for an extended period to establish a significant radius of investigation for each test, and neither gave any indication of depletion or significant barriers within the reservoir.
"During the fourth quarter we began testing pressure management techniques designed to maximize oil production by managing bottom hole pressure drawdown rate," Maranto said.
Acquired bottom hole pressure data indicates that the D5 Sand completions in the F1 and F3 wells exhibit very little pressure drawdown across the perforations.
The most important stages are mainly the pressure drawdown stage and pressure buildup stage.
A change in initial pressure condition and bottom-hole pressure is applied in order to consider the effect of fluid compressibility while the pressure drawdown is the same as previous model.
The general form of material balance deconvolution is provided for the pressure drawdown case in terms of the material balance time function and the rate-normalized pressure drop function.
Or, program the controller to pull the screw back a fraction of an inch before screw rotation to accomplish the same pressure drawdown. Then start screw rotate.
The high flow rates and relatively low pressure drawdown of this well demonstrate excellent productivity, and the data confirms we are connected to a large reservoir.
These tools are designed to respond to formation-behavior-induced mechanical disturbance, such as an applied stress or a pressure drawdown in the wellbore.
The Pilot is performing strongly and demonstrating excellent water rates given this early stage of pressure drawdown, with the five wells already flowing at water rates in excess of 4,200 BWPD in aggregate.

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