RU2000116191A

RU2000116191A - METHOD FOR DEVELOPING DEPOSITS OF HIGH-VISCOUS OIL

Info

Publication number: RU2000116191A
Application number: RU2000116191/03A
Authority: RU
Inventors: Леонид Михайлович Рузин; Владимир Николаевич Басков
Original assignee: ОАО "Коминефть"
Filing date: 2000-06-19
Publication date: 2002-06-20

Claims

1. A method of developing a reservoir of high-viscosity oil, including drilling injection and producing wells, equipping the injection well with a tubing string and heat-resistant packer, pumping coolant into the injection well and extracting oil from the producing well, characterized in that the upper part of the tubing string they are composed of thermally insulated pipes, and the lower part is left uninsulated above the level of the developed object, a heat-resistant packer is installed in the middle of the developed object, then black of tubing coolant is pumped into the lower part of the object (below the packer), and through the annulus cold water is pumped into the top of the object (above the packer), and the flow of cold water is determined by the formula

where q _n is the coolant flow through the tubing string, kg / h;
h '' is the coolant enthalpy at the mouth of the injection well, kcal / kg;
h 'is the enthalpy of the coolant in the developed object below the packer, kcal / kg,
h '= (t _k2 -t _n ) • C _in ;
t _k1 - temperature of water pumped through the annulus in the upper part of the object (above the packer), ^o С;
t _K2 - temperature of the coolant in the lower part of the object (below the packer), ^o С;
t _n - the initial temperature of cold water at the wellhead, ^o C;
C _in - the average specific heat of water, kcal / kg • deg.

2. The method according to p. 1, characterized in that the length of the uninsulated part of the tubing string is determined by the formula

where q _n is the coolant flow through the tubing string, kg / h;
h '' is the coolant enthalpy at the mouth of the injection well, kcal / kg;
h 'is the coolant enthalpy in the developed object below the packer, kcal / kg;
D is the diameter of the uninsulated column;
K is the heat transfer coefficient from the coolant to cold water, kcal / m ² • hour • hail;
θ _cf is the average temperature difference in the upper and lower parts of the uninsulated tubing section, θ _cf = θ _in -θ _n , ^° C;
θ _in - the temperature difference between the coolant and water in the upper part of the uninsulated tubing, ^o C;
θ _n - the temperature difference between the coolant and water in the lower part of the uninsulated tubing (in the area of the packer), ^o C.