Page 47 - 6685
P. 47
flowrate at given bottom-hole pressure in wells or pressure
bottom-hole at the given flow rate. For when thou method, a
system of equations (we have two equations), when the WOC is
written at point F
P f P bh 1 Q 1 Q 2 D 0 Q 1 Q 2 0 F Q 1 Q 2 F 1 Q 1 ;
1
P
f P bh 2 Q 1 Q 2 D 0 Q 1 Q 2 0 F Q 1 Q 2 F 1
Q 2 1 2 Q 2 2 ,
where α - coefficient to increase filtration resistance. It is defined
by the formula (3.22).
External filtration resistance for region 0-F is defined by
the formula (at the region O-F at the formula we substitute the
coefficient of dynamic viscosity oil)
l
0 F oil 0 F .
Bkh
If the task is solved for the case when Q = const, then the
equation (3.22) wondering intermediate position WOC (l 0-F)
determine the bottom-hole pressure depending on the position of
the WOC.
If the task is solved for the case when P bh = const, the
same way the series is calculated the flow rate of wells depending
on the position of the WOC.
Dynamic basic indicators of development depending on
the time under water drive are shown in Fig. 3.10.
47