SU1437495A1 - Method and apparatus for registering oil well production - Google Patents

Abstract

The invention relates to the oil industry. used to monitor the development of oil deposits. The purpose of the invention is to simplify the accounting of products and improve the accuracy and efficiency of determining the quantitative values of the components. The products of the well are divided into components in a gravity field. Their quantitative value is determined. Maintain a portion of the accumulated products. The components of the product displace § from the annular space through a riser transducer by the flow of a well / W / buried product. The time of their passage through the transducer is recorded.

Description

four;:

00

four

WITH

cl

and learn well production. A device for carrying out the method comprises a flow converter 3, an information processing unit 6. The device has a control element 17, a two-way valve-switch 2. The latter is made in the form of a housing with two perpendicularly arranged steps of the locking element with a mechanism for its movement. The use of this method and device allows creating a system with closed control loops, refusing the use of bulky and metal consuming group installations. 2 sec. f-ly, 3 ill.

one

The invention relates to the oil industry and can be used in production accounting systems for oil wells, on-line forecasting of water production processes in borehole products and natural decline in production, as well as for monitoring the development of the oil well.

The aim of the invention is to simplify the accounting of products, increase the accuracy and efficiency of determining the quantitative values of the components of the well production,

Figure 1 shows a schematic diagram of a device for wells equipped with electric center-mounted, bend-pump (ESP) installations — the position of a switch valve in the flow of well production through the annulus; Fig, 2 - the same, equipped with pumping units (the position of the switch valve with the flow of well production through the tubing string); in FIG. 3 shows the dependence of pressure, density, viscosity of the well production, conversion rate of the flow converter on the productivity of the well and the current water content of the well production.

The device for measuring the production of oil wells contains a packer (for wells operated by the mechanized method), a two-way valve switch 2, a flow converter 3, a control unit 4, a logic and calculating unit 5, an information processing unit 6, a pressure sensor 7.

The valve-switch 2 serves to communicate at the wellhead with the internal cavity of the tubing. In addition, the annular space and the inner cavity of the tubing are connected to each other by the upper packer channels formed in the tubing body,

Two-position valve switch 2 is made in the form of body 8 with two perpendicularly arranged seats and hinged in

housing with the possibility of alternate interaction with the seats of the locking element with its mechanism of movement in the form of a flap 9, swinging on the axis 1P, which through

by means of a two-sided hinged lever 11, it is articulated with a double-acting piston 12, the cylinder 13 of which is hinged on the tubing string,. Subcores of the cylinder 13

Channels 14 and 15 and two-way valve 16 communicate with well pressure and atmosphere. The movement mechanism through the two-way crane 16 and 17 is electrically controlled

associated with block 4,

The flow transducer is installed at the end of the valve-switch body.

The device performing the method

on wells, works as follows,

In the lower part of the tubing string of a well, operated using ESP or pumping units, a packer 1 is built in, above which the annular space and the inner cavity of the tubing are interconnected by channels formed in the tubing,

At the wellhead, the annular space and the inner cavity of the tubing communicate with each other by setting the two-way valve

chatel 2, and a flow converter 3 is built in on the discharge pipe. A pressure sensor 7 sensing pressure in the annular space, a two-way valve 16 with a control element 17, is also installed there.

Blocks 4.5 and 6 are placed in existing rooms (shelters) or specially built for this purpose per group of wells. Connect the outputs of the flow converters 3, the pressure sensors 7 by the control element 17 to the inputs of the block 4, the outputs of which are connected respectively to the inputs of the blocks 5 and 6.

In this case, the possible use of existing systems of telemechanics and microprocessor technology of the site, field and NGDU are possible.

After performing these preparatory work and after entering into the control units of the work program, the well is put into operation.

The method is as follows.

When the well is put into operation (Fig. 0), the well production by the reservoir energy or the energy of the flow created by the deep electrocentrifugal (ESP) pump fills the annular space of the well, enters the flowline and through the flow collector at the collection points.

After the annular space is filled with borehole products in accordance with the program, switching valve 2 will switch by applying voltage to the cell. 17 of the two-way switch 16, in which the well pressure is supplied to the supra piston cavity, and the piston cavity of the cylinder 13 communicates with the AU osfer (Fig. 2), and the flow of the well production is directed through the tubing string,

The cut-off, thus, portion of the well production is kept in the annular space for separation and settling into components in the field of gravitational forces.

After separation and settling of the well production and when a certain pressure value is reached in the annular space at the wellhead, in accordance with the program, the valve will switch

switch in a position in which the flow of downhole products displace components from the annulus into the discharge pipe through the flow converter.

When the components of the product move through the flow converter, the conversion coefficient of which in these media is embedded in the program of the information processing unit, the well productivity per unit of time is determined and the transit time of the components through the flow converter, for example, by changing the conversion ratio of the flow converter or by density indicator ( FIG. 3).

The quantitative values of the components of the well production and their ratios per unit of production are taken into account, taking into account the productivity of the well and the time it takes to pass through the flow converter, for example, according to this relationship:

. t

g

-gr - 1

V. T o

where v

t ,; t

H

- the amount of products that passed through the flow transducer for t in - the time of passage through the flow transducer, respectively, of gas, oil, and water.

Determine the coefficient of conversion flow when moving through the tubing string and through the gas-liquid mixture flow converter

five

K-

P

eleven

where K is the desired conversion coefficient;

n is the number of pulses of the flow converter in time T; Y - well productivity per unit of time.

50

55

The number of downhole products is taken into account taking into account the conversion coefficient found and the quantitative values of the components are determined taking into account their ratios per unit of production, the conversion ratio of the flow converter and the ratio of components per unit of production are periodically refined (FIG. 3).

5 1

The described method and apparatus for its implementation allow; create in the oil and gas industry a collection system with closed control loops, reject the use of bulky and metal consuming satellite installations of the Satellite type or its analogs; take into account the production of oil wells with the issuance of quantitative values of its components; operatively to predict the process of watering of well production and natural decline in production; provide one-way information on the extent and pro-portion of the involvement of each well in the oil reservoir development; | to provide a higher point of JHocTb accounting mode of the reservoir as | Development Object; provide operational information to regulate {the operation of the reservoir - well system - the tempo of the selection of formation production; provide operational information to clarify the filtration-capacitive parameters of the reservoir system.

Ф о р. m ula invention

i 1, A method of accounting for the production of oil wells, including the division; the production of a well into components in: the field of gravity forces and the determination of their quantitative values, characterized in that

simplify product accounting and increase the efficiency of determining quantitative values of components, periodically accumulate well production in the annulus, withstand a portion of accumulated production, displace product components from the annular space through the flow converter with the well production flow, record the time it passes through the flow converter and record the production squatters.

2, A device for measuring the production of oil wells, including a flow transducer and an information processing unit connected to it, characterized in that, in order to increase the accuracy of determining the quantitative values of the components, it is equipped with a control element, a two-position switch valve, a housing with two perpendicularly arranged saddles and hingedly mounted in the housing with the possibility of alternately interacting with the saddles of the locking element with its mechanism of movement, moreover The flow generator is installed at the end of the body of the two-way valve-switch, and the movement mechanism is connected through the control element to the processing unit.

1

RNGS ICM PHN / ft Z

T uffcfff iff e Me / Jf ffaff t / r / otfecce s f e / ft / Jf / 7 f7A // ft (/ V

% NgO

Claims (2)

Claim 1. A method of accounting for the production of oil wells, including dividing the production of the well into components in the field of gravitational forces and determining their quantitative values, characterized in that, in order to * simplify the accounting, production and increase the efficiency of determining the quantitative values of components periodically accumulate well production in the annulus, withstand a portion of the accumulated product, displace the product components from the annulus through the flow transducer by the flow of the borehole product, reg Trier during their passage through the sensor, and produce records of well production, 2, A device for recording oil well products, including a flow transducer and an information processing unit connected to it, characterized in that, in order to increase the accuracy of determining the quantitative values of the components, it is equipped with a control element, a two-position valve-switch, made in the form of a housing with two perpendicularly located saddles and pivotally mounted in the housing with the possibility of alternating interaction with the saddles of the locking element with a mechanism for moving it, and the transformation The flow rate indicator is mounted on the end face of the on / off switch valve body, and the movement mechanism is connected through the control element to the processing unit. share Rngs / cm ' ^g Ang / m t Tt ta J ² a Ae FPS t Gg trjn - • · Μ 1 To the stump. modified ^ · Gas Η i j ι 'i j | water / hpiMcmu with the growth of the bottom or ft of the lodum _ _ --- --- change curve yes In the process times are long-