SU1654549A1 - Method for producing viscous formation fluid and relevant recovery plant - Google Patents

Abstract

The invention relates to the mining industry, in particular to the exploitation of deposits with viscous and highly viscous oils. The purpose of the invention is to increase the efficiency of the viscous mining process; reservoir fluid by reducing hydraulic friction losses. The well pump is boosted along a column of 2 hollow rods with a simultaneous supply of a low viscosity fluid to a column of hollow rods to form an annular boundary layer of a low viscosity fluid and rotation of the column of rods. A fluid with a density higher than the viscous density is fed to the low viscosity fluid. formation fluid As mineralized water, mineralized water is used as low liquidity. Water consumption is determined by the mathematical formula. An installation for carrying out the method comprises wellhead equipment 3 with a collection line 4, chokes 5-7. ground drive 8, connected to a well pump by means of a column of 2 rods and a column of pump-compressor pipes (CNPC). inside which is consl

Description

The invention relates to the mining industry, in particular to the exploitation of deposits with viscous and highly viscous oils.

The purpose of the invention is to increase the efficiency of the production of viscous formation fluid by reducing hydraulic friction losses.

FIG. Figure 1 shows a schematic of a device for producing viscous formation fluid; figure 2 - section aa in figure 1.

A method for producing viscous reservoir fluid involves raising a viscous reservoir fluid with a borehole pump 1 through a column of 2 hollow rods while simultaneously feeding a low-viscosity fluid to a column of 2 hollow rods to form an annular boundary layer of a thin fluid, rotating the column of 2 hollow rods, and as small Liquid fluid is fed to it with a density greater than the density of a viscous reservoir fluid.

Saline water is used as a low-viscosity fluid, and its flow rate at the intake of a well pump 1 is determined from

Oj-2-On-K d,

where Oj is the flow rate of a small liquid, m / s;

QH - well pump flow, m / s; 5 - maximum height of irregularities of the inner surface of the column of hollow rods, m;

R is the inner radius of the column of hollow rods, m;

K is the safety factor, taking into account the flow turbulization and determined by calculation,

Example. The supply of the UEVNT-25-1000 electric screw pump installation is QH 25 m3 / day, the inner radius of the column of hollow rods R is 0.035 m, the maximum height of irregularities of the internal surface of the column of hollow rods is 0.0005 m,

the safety factor, which takes into account the flow turbulization and is determined from the calculated interval K 1.5 - 2.0, takes K 1.75. Substituting value into dependency

Ozh - On1 K

H

get that feed

the low viscosity fluid to the borehole screw pump intake is Og 1.25 m3 / day.

Installation for the production of viscous reservoir

fluid contains wellhead equipment 3 with a collection line 4, chokes 5-7, a ground drive 8. connected to a borehole pump 1 by means of a column 2 of hollow

rod and tubing column 9, inside of which a column of 2 hollow rods is located concentrically with a well pump 1, Usganoak is equipped with a flow swirler 10 located above

well pump 1 in the column 2 hollow rods rotatably with the latter.

The installation is equipped with an annular separation of a low viscosity liquid from a viscous reservoir fluid placed in the upper part of the column 2, made in the form of spacers 11 and 12 located coaxially relative to each other. The cavity of the internal 11 is hydraulically connected through a choke 5 with a collection line 4, and the cavity of the outer pipe 12 through another throttle 6 with the space formed by the columns of hollow rods 2 and tubing 9.

The downhole screw pump 1 includes a yoke, a screw 13 and a sleeve 14. The pump yoke is connected by a column of 2 hollow rods to a ground drive 8. In the lower hollow rod there is a swirler 10 made, for example, in the form of a row of plates 15 mounted inside the hollow rod and rotating together with her. Screw 13 by means of a clutch 14, which provides a radial displacement of the screw during operation

the pump is connected by a column 9 to the compression tubes at the bottom, having slots in the lower part for entering the formation fluid from the space limited by the production string 16 The ground drive 8 is mounted on the flange of the production string 16, it consists of a seal 17 that seals the internal cavity of the column 9 of pump-compressor tubes radial 18 and radial thrust 19 bearings mounted in housing 20 The upper end of the column 2 is hollow with the help of transmission 21, for example, gear transmission connected to the engine Telem I above ground drive transmission ratopagaeto Teren neck swivel 22, the fixed sleeve 12, which is, located coaxially to the choke pipe 11 is suitable conduit 21 with the audio cal water whose flow is controlled throttle f. / The choke 6 is connected to the column 9 pipe 2-1

Installing pa & or-ier as follows.

Torsional MCMOr-ii from a ground drive engine 8 by transmission by transmission 21 columns 2 hollow rods. Together, the latter rotates zazichrit 10 and the screw pump sleeve 1. This fluid flows through the process of pumping the pump into the internal cavity. Column 9 is fed with technical water, which, together with the fluid from the fluid, is fed to the intake of the screw pump 1 The mixture of produced and technical water coming out of the pump 1 is twisted by a swirler 10. It is also separated as an outer thin layer of water and the inner layer The viscous formation fluid rises along a column of 2 hollow rods. As the column 2 of the hollow rods rotates, the separation process will be continuous and the turbulization of the flow of the rising liquid will not entail the mixing of liquids, which takes place in the known methods of pumping viscous liquids. The thickness of the annular fluid of the low-level liquid increases during the lifting of the liquid. since the process of separating water from the formation fluid occurs throughout the entire height of the column. When the swivel 22 is reached, the viscous fluid through the internal nozzle 11 through the choke 5 is discharged into the collection system, and the technical water through the annular channel between the nozzles 11 and 12 and the choke 6 through the pipeline 24 returns to the well.

If it is necessary to pump a viscous fluid with an annular layer of water into the collection and pumping system, set the throttles to 5-7

Форм - л I1 I (i f) Rete n and o

1 Method of extraction by a point of a plug-in fluid and a borehole, including the lifting of a RYAZKY plow-down tank with a borehole pump along the column polt, ix stngng, simultaneous chopping of a low-viscosity liquid and a column of hollow rods to form an annular boundary layer In order to increase the efficiency of the extraction of viscous reservoir fluid by reducing hydraulic friction losses when the viscous reservoir fluid rises, the rods are rotated and little liquid is fed into itTew exceeding pchtnost viscous liquid pla stovoi

2 The method according to claim 1 of tl and h and y and so that in the quality of low-viscosity liquid water is used / mineralized, and its flow rate at the well bore well is determined from the expression

5Q pO „-CL

0

five

R,

0

 ,

five

0

five

0

five

where O is the flow rate of this liquid, m:.

He feed well pump, m Ye, d Makgim mana height of uneven and internal front of the column of hollow rods m

R BHVToei-NII radius columns polk rods, m

K k i fitsien g stock, taking into account touristic flow and defined pic in one way

3 Installations for production of viscous reservoir fluid: i and containing wellhead equipment with a collection line, throttles, a ground drive connected to a well pump through a hollow column of a non-axial compressor pipe, inside which the co / bus of hollow rods with a well hole is located yucentrically pump and means for supplying a low-viscosity fluid, characterized in that, in order to increase the efficiency of the production of a viscous reservoir fluid by reducing hydraulic friction losses, it is equipped with a flow swirler; nnym above the downhole pump to a column of hollow rods rotatably together with the latter.

4. Installation of popz, characterized in that it is provided with an annular separator of a small fluid placed in the upper part of the column of hollow rods of a small fluid from the formation fluid that is arranged in the form of two pipes arranged coaxially relative to each other

71654549,8

the inner of which is hydraulically adjacent to the space formed by the aggregate through the choke with the collection line, and the hollows of the hollow rods and the pump-compression cavity of the external pipe through the throttle pipes.

16 FIG

Claims (4)

1. A method of producing viscous reservoir fluid, including raising a viscous reservoir fluid by a well pump rid of a hollow rod string while simultaneously delivering a low-viscosity fluid to the hollow stem string to form an annular boundary layer of a low viscosity fluid from the bottom I am the one. that, in order to increase the efficiency of the process of producing a viscous reservoir fluid by reducing hydraulic friction losses when raising a viscous reservoir fluid, the rod string is rotated, and as a low viscosity fluid, fluid with a density is supplied to it. higher density viscous reservoir fluid. 2. The method according to claim 1. featuring with that. that mineralized water is used as a low-viscosity fluid, and its flow rate at the intake of the well pump is determined from the expression (K | -C) n’K9. where 0 _w is the flow rate of low viscosity fluid, m ' ^! /about. Qu submission of the borehole pump, m ’/ s: 9 maximum height of the irregularities of the inner surface of the column of hollow rods m; R extra-cold radius of the column of hollow rods, m: K. - co stock margin factor, taking into account the turbulence of the flow and determined by the design bog. 3. Installation for the production of viscous reservoir fluid g and containing wellhead equipment with a collection line, throttles, a surface drive connected to the borehole pump via a hollow rod string, a tubing string, inside which a hollow rod string with a well pump is concentrically located, and ) for supplying a low-viscosity fluid, characterized in that. what. in order to increase the efficiency of the process of producing a viscous reservoir fluid by reducing hydraulic friction losses, it is equipped with a flow swirl placed above the borehole pump in a column of hollow rods with the possibility of rotation together with the latter. 4. Installation according to claim 3, kicking in that it is equipped with an annular separator of low-viscosity fluid from viscous reservoir fluid located in the upper part of the hollow rod column, made in the form of two nozzles arranged coaxially relative to each other, the inner cavity of which is hydraulically communicated through the throttle with a collection line, and the cavity of the outer pipe — through a cross-country drain with a space formed by columns of hollow rods and tubing.