RU63436U1 - INSTALLATION FOR SIMULTANEOUSLY SEPARATE DOWNLOADING AND PRODUCTION FROM MULTIPLAYER DEPOSIT THROUGH ONE WELL - Google Patents

Abstract

The invention relates to the oil industry, namely: to the development of a multilayer reservoir through one well.

The problem and the expected result solved by the invention are to increase the efficiency of the installation for simultaneously separate injection and production from a multilayer reservoir through one well and providing the possibility of advanced commissioning of idle formations without special drilling of additional wells.

The installation for simultaneously separate injection and production from a multilayer reservoir through one well, including an injection pipe string with one packer, lowered onto the lower formation, and a production pipe string lowered onto the upper formation, is characterized in that the production pipe string is equipped with a rocking machine and a deep pump and is located parallel to the discharge pipe string.

The use of the installation is especially relevant for the effective development of small multilayer oil and gas fields with a limited well stock and the local location of individual reservoirs.

Description

The invention relates to the oil industry, namely: to the development of a multilayer reservoir through one well.

Known installation / Pat. USA No. 2847072, cl. 166/297 /, including an overhead production packer installed in casing between two layers; tubing (tubing), the lower end of which is above the upper reservoir; tubing extension extending through the production packer and connected to the tubing to communicate the lower formation and tubing. From the lower reservoir, production is carried out through an tubing extension; at the same time, production from the upper layer is carried out separately through the space between the casing and tubing.

A disadvantage of the known device is the possibility of its use for simultaneous separate operation only in the conditions of gushing of the upper reservoir. It is impossible to simultaneously separately inject, for example, water or another process fluid to maintain reservoir pressure, and production from a multilayer reservoir through one well.

Known installation for simultaneously separate operation of two layers / Pat. RF №2221136. E 21 B 43/14, 10.01.2004./, including a rocking machine, a column of lift pipes, a sucker rod pump, a packer and a liner, the sucker rod pump being equipped with an additional suction valve to enable separate entry of the production of each of the layers into the sucker rod cylinder.

The disadvantage of the installation is its low efficiency due to the structural dependence on the pressure in jointly exploited formations; as a result, the rise of products is carried out simultaneously from both layers in one column, without layer separation and accounting of products. Accordingly, there is no control over the state of reservoir development; it is impossible to determine the flow rates, water cut by layers; reservoir and bottomhole pressure, removal of the pressure recovery curve and other characteristics, knowledge of which is required by current regulatory documents for development. Separate injection and production from a multilayer reservoir through one well is not possible without additional drilling of injection wells.

Known equipment for joint or separate injection of fluid into two layers through one well / A.C. USSR No. 1753750, Е 21 В 43/14, 03/10/1995./, including a production string lowered into a cased hole with filter holes, a tubing string with a liner and shut-off elements and saddles for shut-off elements, and the tubing shank is equipped with a sleeve lantern with blades and leaf springs mounted with a clearance on the tubing shank with the possibility of axial movement and rotation, while the locking elements are pivotally mounted on the outside of the lamp springs, and the seats for the locking elements are made in the filter holes translational column by in-tube space.

The disadvantage of the equipment is its complexity and, accordingly, low technology, as well as the impossibility of simultaneously separate injection and production from a multilayer reservoir through one well.

Closest to the claimed downhole installation with the possibility of separate injection and production from a multilayer reservoir through one well / Pat. RF №2211311, Е 21 В 43/14, 08/27/2003 ./, consisting of a column of pipes of a smaller diameter with one packer and an additional column of pipes of a larger diameter, installed concentrically relative to the first column; the length of the additional pipe string of larger diameter reaches the lower perforation interval of the upper object. A pipe string of smaller diameter with one packer is equipped with sections with adjustable technical parameters located above and below the packer. Each section includes at least one downhole chamber and / or one nipple. It has a valve for regulating the flow. In this case, the packer is equipped on top with a pipe string disconnector and / or telescopic connection.

Simultaneous injection of the working agent (water) into the lower object through the inner pipe string and simultaneous selection of reservoir fluids through the annulus from another - upper - production facility are performed.

The disadvantage of the installation is the lack of control over the development status of the lower object; impossible to remove the injectivity profile; high hydraulic losses when pumping the working agent (water) through the nipple and valve device.

A disadvantage of the installation is also a lack of efficiency due to the unstable flowing mode in the annular space; as well as the impossibility of studying reservoir and bottomhole pressure, the impossibility of removing

pressure recovery curve and other characteristics, knowledge of which is required by current regulatory documents for development.

It is necessary to combat deposits of asphalt-resin-paraffin substances (paraffin) and corrosion on the annular space.

Due to the decrease in reservoir energy, a transition to a gas-lift production method is required, which will require the construction of a gas compressor station and an integrated gas dehydration system and the construction of a gas pipeline. This will make the installation unprofitable.

The problem and the expected result solved by the invention are to increase the efficiency of the installation for simultaneously separate injection and production from a multilayer reservoir through one well and providing the possibility of advanced commissioning of idle formations without special drilling of additional wells.

Provides control over the development status of the lower facility; pickup profile removal; low hydraulic losses.

The operating mode of the installation is adjustable.

The opportunity is provided to study reservoir and bottomhole pressures, take the pressure recovery curve and other characteristics, the knowledge of which is required by current regulatory documents for development.

The problems of the control of paraffin and corrosion protection are solved much easier.

The installation is cost-effective, as it enables advanced commissioning of idle formations without special drilling of additional wells.

The use of the installation is especially relevant for the effective development of small multilayer oil and gas fields with a limited well stock and the local location of individual reservoirs.

The problem is solved in that the installation for simultaneously separate injection and production from a multilayer reservoir through one well, including an injection pipe string with one packer, lowered to the lower formation, and a production pipe string lowered to the upper formation, characterized in that the production pipe string it is equipped with a rocking machine and a deep pump and is located parallel to the discharge pipe string.

The proposed installation is shown in FIG. Here:

1 - rocking machine

2 - rod column

3 - flow line of the sucker rod pump

4 - production pipe string

5 - thermometer

6 - discharge pipe

7 - pedestal for suspension of the production and discharge pipe columns

8 - setting the dosage of chemicals

9 - annular valve for research

10 - production casing

11 - discharge pipe string

12 - sucker rod pump

13 - upper layer (for oil production)

14 - filter of the deep pump

15 - packer, isolating the upper layer from the bottom

16 - funnel injection pipe string (for the study of the reservoir)

17 - lower layer (for pumping the process fluid)

18 - bottom (sump) production casing.

Installation works as follows.

The products of the upper reservoir (for oil production) 13, located above the packer 15, isolating the upper reservoir 13 from the lower reservoir 17, enters through the filter 14 into the sucker rod pump 12, driven by the rod string 2 and the pumping unit 1, through the pipe production string 4, suspended from the pedestal 7, in the flow line 3 of the sucker rod pump 12 and is diverted to the metering device.

Separate injection into the lower layer (for pumping the process fluid) 17 is as follows. The process fluid through the injection pipe 6 after dosing the chemical with installation 8, measuring the temperature with a thermometer 5 and determining the pressure enters the injection pipe string 11 equipped with a funnel 16 (for reservoir analysis) and is pumped into the lower reservoir 17. The presence of the sump 18 allows the study of wells to determine pick-up on the interval of perforation, as well as the accumulation of solids deposited on the face during operation.

The present invention, therefore, increases the efficiency of the installation for simultaneous separate injection and production with the possibility

layered control over the state of development. There is the possibility of advanced commissioning of idle formations without special drilling of additional injection wells, which, in turn, has a positive effect on the environment and saves the cost of drilling additional wells.

Claims (1)

Installation for simultaneously separate injection and production from a multilayer reservoir through one well, including an injection pipe string with one packer, lowered to the lower formation, and a production pipe string lowered to the upper formation, characterized in that the production pipe string is equipped with a rocking machine and a deep pump and is located parallel to the discharge pipe string.