RU2661952C1 - Method of thermal-mining development of deposits of high-viscosity oil mine workings and device for implementation the same - Google Patents

Method of thermal-mining development of deposits of high-viscosity oil mine workings and device for implementation the same Download PDF

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Publication number
RU2661952C1
RU2661952C1 RU2017130745A RU2017130745A RU2661952C1 RU 2661952 C1 RU2661952 C1 RU 2661952C1 RU 2017130745 A RU2017130745 A RU 2017130745A RU 2017130745 A RU2017130745 A RU 2017130745A RU 2661952 C1 RU2661952 C1 RU 2661952C1
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Russia
Prior art keywords
microtunnel
wells
oil
surface
underground
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RU2017130745A
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Russian (ru)
Inventor
Андрей Владиславович Ковалев
Юрий Владиславович Круглов
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Андрей Владиславович Ковалев
Юрий Владиславович Круглов
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/24Methods of underground mining; Layouts therefor for oil-bearing deposits

Abstract

FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to oil industry. Method includes penetration two parallel mine workings, drilling surface injection and underground production and steam distribution wells, using optical sensors for temperature monitoring of underground wells, transfer of information from sensors via optical cable to the computer, transfer of control commands from the computer to control devices of surface injection wells, implementation of steam injection into surface force wells and the stopping of steam injection when the temperature in the underground production wells increases. Penetration of two parallel different diameter micro-tunnels is taken. Each micro-tunnel is made of consisting an inclined input section starting from the surface of the horizontal section and an output inclined section extending to the surface. Larger diameter micro-tunnel is a service one. Second micro-tunnel with a smaller diameter is an oil collection system for collecting oil containing liquid and placing the steam supply line to underground steam distribution wells, where at the transition section from the horizontal section to the inclined outlet section, a sump is assembled to collect the oily liquid, which is pumped to the surface through an oil pipeline laid in the outlet inclined section. Steam distribution and production wells are drilled from niches that are traversed perpendicular to the longitudinal axis of the horizontal section of the service micro-tunnel above the oil recovery micro-tunnel and connected to a small micro-tunnel by a vertical well with a sealed hatch. Niches internal volume is separated from the service micro-tunnel by a sealed gateway.
EFFECT: well flow rate is measured to determine whether it is necessary to carry out maintenance or well maintenance operations, the possibility of steam breakthrough is excluded and a heated oil-containing liquid into the mine workings, safe operating conditions of the maintenance personnel are ensured.
2 cl, 4 dwg

Description

The invention relates to the oil industry and may find application for thermal mining of high-viscosity oil fields with mine workings, passed by microtunneling.

A known method of mine development of a highly viscous oil field, including tunneling, drilling of surface injection wells and underground production and steam distribution wells, equipment with sensors for monitoring the temperature of underground wells, steam injection into surface injection wells, stopping steam injection at elevated temperatures, and oil extraction from underground wells.

Equipment with sensors for temperature control is carried out at the mouths of underground wells; optical sensors recording the temperature of the produced fluid are used as sensors

Information from the sensors is transmitted via an optical cable to a computer in which the received information is processed, control commands are transmitted from the computer to control devices of surface injection wells, which supply or interrupt steam supply to the corresponding injection wells to ensure uniform heating of the oil reservoir and intensification of oil production (RF patent No. 2267604, CL ЕВВ 43/24, publ. 01/10/2016). This invention is taken as a prototype for the proposed technical solutions.

The disadvantage of the above method are: driving a large number of long mine workings and high maintenance costs, the possibility of steam breakthrough into underground wells in the presence of a direct hydrodynamic connection between the surface injection well and underground wells, and steam flowing into the mine workings with an increase in temperature above permissible safety requirements values and, as a consequence, the need to withdraw staff from mining, spilling oil into an open catchment grooves, accompanied by an increase in air temperature in the mine workings above the permissible and worsening conditions for servicing underground wells, the inability to measure the flow rate of the wells and decide on whether to continue operating or repairing the well.

The task of creating a group of inventions is to eliminate the disadvantages of the above prototype.

The problem is solved using the signs specified in paragraph 1 of the claims common with prototypes, such as a method of thermomine mining of high-viscosity oil fields with mine workings, including drilling surface injection and underground production and steam distribution wells, using optical sensors to control the temperature of underground wells , transmitting information from sensors via optical cable to a computer in which the received information is processed, transferring control commands from a computer to control devices of surface injection wells, performing steam injection into surface injection wells and stopping steam injection at an increase in temperature in underground production wells, and distinctive significant features, such as microtunneling, are driving two parallel different diameters of mine workings - microtunnels, while each microtunnel is made up of an input inclined section starting from the surface, a horizontal section and an exit of the inclined section extending to the surface, a microtunnel of a larger diameter is a service one for accommodating technological equipment and elements of an automatic control system for servicing underground wells, and a second microtunnel of a smaller diameter is an oil collector for collecting oil-containing liquids and placing a steam supply pipe to underground steam distribution wells, in which at the transition point from the horizontal section to the inclined outlet section, a sump is equipped to collect oily fluids that are pumped to the surface through an oil pipeline laid in the outlet inclined section, while steam distribution and production wells are drilled from niches that are perpendicular to the longitudinal axis of the horizontal section of the service microtunnel above the oil gather microtunnel and connected to the small microtunnel by a vertical well with an airtight hatch, the volume of niches is separated from the service microtunnel by a hermetic gateway.

The problem is solved using the signs specified in paragraph 2 of the claims, such as a thermal mine development of high-viscosity oil fields for implementing the method according to claim 1, characterized in that it contains two microtunnels: service, made of reinforced concrete pipes, equipped with windows for sinking niches closed with removable covers with the possibility of their dismantling from the inner space of the microtunnel, and oil gathering microtunnel made of reinforced concrete pipes, equipped in the upper part with a flange to replicating a sealed manhole for access from a niche covered by a protective plug with external attachment points, while the service microtunnel is equipped with a compressed air duct designed to create excess air pressure in the niches from the side of the wellheads and to cool the air when working in niches at the oil gathering the microtunnel at the transition point from the horizontal section to the inclined outlet section is equipped with a sump for collecting oil-containing liquid, which is pumped to the surface by oil the wire laid in the outlet inclined section, and the steam distribution and production wells are made of niches that are perpendicular to the longitudinal axis of the horizontal section of the service microtunnel above the oil gathering microtunnel and are connected to the small microtunnel by a vertical well with an airtight hatch, while the internal volume of the niches is separated from the service microtunnel a lock, at the mouths of underground steam distribution and production wells, equipped with storage tanks and shutoff valves In combination with a remote drive, the piping system is led into the oil gathering microtunnel, while the storage tanks are equipped with temperature sensors and signaling devices for the oil-containing liquid level of the automatic control system.

The set of essential features in both the method and the device allows to obtain the following technical result: reduce the cost of construction and maintenance of mine workings, organize the measurement of well production to determine the need for maintenance or conservation of wells, eliminate the possibility of breakthrough of steam and heated oily liquid in mining, providing safe working conditions for staff.

The invention is illustrated by drawings, in which: FIG. 1 - arrangement of microtunnels during the development of a field for oil production in this way; in FIG. 2 - placement of underground well equipment in a niche of a service microtunnel; in FIG. 3 - placement of equipment in a niche near the sump of the oil gathering microtunnel; in FIG. 4 - device reinforced concrete pipes service and oil gathering microtunnel to implement the proposed method.

The proposed method is carried out in the following sequence.

In the selected area, the service microtunnel 1 with a diameter of at least 3500 mm and the oil gathering microtunnel 2 with a diameter of at least 1500 mm are drilled (Fig. 1). Microtunnels 1 and 2 are mine tunnels, passed by microtunneling method, providing for pushing columns 3 and 4 of reinforced concrete pipes 5 and 6 behind a mechanized shield, while the tunneling path of microtunnel 1 and 2 includes an input inclined section 7 and 8 starting from the surface, horizontal section 9 and 10, the output inclined section 11 and 12 facing the surface. The horizontal section 10 of the oil gathering microtunnel 2 passes with a slight slope towards the output inclined section 12 to provide the drain of the extracted oily liquid. Reinforced concrete pipes 5 are assembled into the column 3 so that pipes 5 without windows 13 are installed on inclined sections 7 and 11, and reinforced concrete pipes 5 with windows 13 and plugs 14 are installed on horizontal section 9 (Fig. 4). Reinforced concrete pipes 6 are assembled in column 4 in such a way that pipes 6 without flanges 15 for mounting hatch 16 with plugs 17 are installed on inclined sections 8 and 12, and reinforced concrete pipes 6 with flanges 15 for mounting hatch 16 and plugs 17 are installed on horizontal section 10 (Fig. 2, 4). The number and location of reinforced concrete pipes 5 and 6 is set by the project.

At the end of sinking of microtunnels 1 and 2, a fan unit 18 is installed at the mouth of the outlet inclined section 11 of the service microtunnel 1, an oil exhaust system 19 with an exhaust fan 20 is installed at the mouth of the output inclined section 12. After the fan unit 18 and the oil gas extraction system are put into operation 19, in the service microtunnel 1, a monorail 21, a compressed air supply pipe 22 for drilling equipment and additional ventilation, a fire pipe, are mounted along its entire length 23, the power cables 24 (Fig. 3). Then, in the horizontal section 9, plugs 14 are removed from the windows 13 on reinforced concrete pipes 5. From the open windows 13, niches 25 are drilled passing over the oil gathering microtunnel 2 perpendicular to the longitudinal axis of the service microtunnel 1, the niches 25 are fastened with a reinforced concrete heat-insulated support 26 (Fig. 2).

From the niche 27, which runs similarly to the niche 25 and is located in close proximity to the transition of the horizontal section 10 of the oil gathering microtunnel 2 to the output inclined section 12, the sump 28 is drilled and arranged to collect the oil-containing liquid, a pump 29 is installed in the sump 28 to pump the oil-containing liquid to the surface , in the output inclined section 12 of the microtunnel 2 is the installation of the pipeline pumping oily liquid 30 to the surface. At the entrance to the niche 27 from the side of the service microtunnel 1, a sealed gateway 31 is installed, an additional ventilation pipe 32 is laid from the compressed air supply pipe 22 to the internal space of the niche 27 (Fig. 3).

In the niches 25 vertical wells 33 pass down to the oil gathering microtunnel 2, plugs 17 are dismantled on the reinforced concrete pipes 6, the hatch 16 is installed on the vacant flanges 16. Then, in the inlet inclined section 9 and the horizontal section 10 of the oil gathering microtunnel 2, a steam supply line 34 for supplying steam to the underground steam distribution wells, the steam line 34 is equipped with nozzles 35, leaving through the hatches 16 in the niche 25.

In the niches 25, underground steam distribution wells 36 and underground production wells 37 are drilled. At the mouth of the underground steam distribution wells 36, a shut-off-control device 38 with a remote drive 39 is installed, a steam supply pipe 35 is connected to the shut-off-control device 38. At the mouth of underground production wells 37, a storage tank 40 is installed, equipped with level 41 signaling devices and an optical oil temperature sensor 42, as well as shut-off valves 43 with a remote drive 44 and a pipe 45 passing through the hatches 16 to drain the oil-containing liquid from the storage tank 42 into the oil gathering microtunnel 2 (Fig. 2).

At the entrance to the niches 25 from the side of the service microtunnel 1, airtight locks 31 are installed, the additional ventilation pipes 32 are installed from the compressed air supply pipe 22 into the internal space of the niche 25, and the control and monitoring unit 46 of the automatic control system is installed in the niches 25 from the side of the service microtunnel 1 as well as remote drives 39 and 44 on the elongated shafts of the shut-off and control device 38 and shut-off valves 43. The laying of fiber optic cable 47 of the information channel AI to the control computer 48 of the surface control station.

At the mouth of the input inclined section 8 of the oil gathering microtunnel 2 is installed sealed jumper 49.

Surface injection wells 50 are drilled from the surface according to a design-defined grid, which are equipped with control devices 51 for regulating steam injection and metering units 52.

Upon completion of the preparatory work and verification of the installed equipment, the locks 31 are closed, the microtunnels 1 and 2 are put into unattended operation, and the injection of superheated water vapor into underground steam distribution wells 36 and surface injection wells 50 begins.

The incoming steam warms up the massif, under the thermal influence of the steam, the oil viscosity decreases, and together with the condensate it enters the underground production wells 37, accumulating in the storage tanks 40. When the set upper level is reached, the alarm 41 activates, the computer 48 issues a command to open the shutoff valves 43, and the oily liquid is discharged through the nozzle 45 into the oil gathering microtunnel 2. After lowering the level in the storage tank 40, the alarm 41 is activated, the computer 48 issues a command to close stop valves 43 and the discharge of oily liquid ceases. The collected oily liquid is pumped from the oil gathering microtunnel 2 through a pipe 30 to the surface.

The steam supply to the surface injection wells 50 and underground steam distribution wells 36 is regulated by the readings of the temperature sensors 42, it stops when the set value is exceeded and resumes after the temperature of the accumulated liquid drops to the set value. In this case, the volumes, time and parameters of steam injection into the surface injection wells 50 and underground steam distribution wells 36 are set by the computer 48.

If it is necessary to carry out work in niches 25, the air supply is preliminarily increased through the compressed air supply pipe 22 through the pipe 32 to the internal volume of the niche 25, after the temperature has been reduced and the vapors have been removed, the gateway 31 is opened and the necessary work is performed.

Using the method and device described above for its implementation allows to reduce the cost of construction and maintenance of mine workings, to exclude the flow of steam into the mine workings and oil drainage into open grooves, to normalize the temperature regime in the mine workings, to control the flow rate of the wells and decide on whether to continue operating or about well repair.

From the description and practical application of the present inventions, other particular forms of their implementation will be apparent to those skilled in the art. This description and examples are considered as material illustrating inventions, the essence of which and the scope of patent claims are defined in the following claims, a combination of essential features and their equivalents.

Claims (2)

1. The method of thermal mine development of high-viscosity oil fields with mine workings, including drilling surface injection and underground producing and steam distribution wells, using optical sensors to control the temperature of underground wells, transmitting information from sensors through an optical cable to a computer in which the received information is processed, transmitting control commands from a computer to control devices of surface injection wells, steam injection to the surface production injection wells and the cessation of steam injection with increasing temperature in underground production wells, characterized in that the microtunneling method leads to the drilling of two parallel different diameters of the mine workings - microtunnels, each microtunnel being made up of an inclined input section starting from the surface, a horizontal section and the output inclined section extending to the surface, a microtunnel of a larger diameter is a service for placement of technological equipment and elements of the automatic control system for servicing underground wells, and the second microtunnel of smaller diameter is an oil gathering channel for collecting oil-containing liquid and placing a steam supply pipe to underground steam distribution wells, in which a sump is installed at the point of transition from a horizontal section to an inclined outlet section, for collecting oil-containing liquid, which is pumped to the surface through an oil pipeline laid in the outlet inclined section, while steam distribution and production The drilling wells are drilled from niches that are perpendicular to the longitudinal axis of the horizontal section of the service microtunnel above the oil gathering microtunnel and are connected to the small microtunnel by a vertical well with an airtight hatch, and the internal volume of the niches is separated from the service microtunnel by a hermetic lock.
2. The device of thermal mine development of high-viscosity oil fields for implementing the method according to claim 1, characterized in that it contains two microtunnels, service, made of reinforced concrete pipes, equipped with windows for driving niches, closed with removable covers with the possibility of dismantling them from the inner space of the microtunnel, and oil gathering microtunnel, made of reinforced concrete pipes, equipped in the upper part with a flange for fastening a tight manhole for access from a niche, closed with a protective plug from the outside mounting nodes, while the service microtunnel is equipped with a compressed air supply duct designed to create excess air pressure in the niches from the side of the wellheads and to cool the air when working in niches, a sump is equipped at the oil gathering microtunnel at the transition point from the horizontal section to the inclined outlet section for collecting oily liquid that is pumped to the surface through an oil pipeline laid in the outlet inclined section, and steam distribution and production wells The wells are made of niches that are perpendicular to the longitudinal axis of the horizontal section of the service microtunnel above the oil gathering microtunnel and are connected to the small microtunnel by a vertical well with an airtight hatch, while the internal volume of the niches is separated from the service microtunnel by a hermetic lock, equipped with an underground steam distribution and production wells tanks and shut-off valves with remote drive piping system displayed in the oil gathering microtunnel, at the same time, the storage tanks are equipped with temperature sensors and signaling devices for the oily liquid level of the automatic control system.
RU2017130745A 2017-08-30 2017-08-30 Method of thermal-mining development of deposits of high-viscosity oil mine workings and device for implementation the same RU2661952C1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458945A (en) * 1981-10-01 1984-07-10 Ayler Maynard F Oil recovery mining method and apparatus
RU2267604C1 (en) * 2005-03-09 2006-01-10 Аркадий Анатольевич Боксерман Mine oil field development method
RU2330950C1 (en) * 2006-12-11 2008-08-10 Открытое акционерное общество "Татнефть" им. В.Д. Шашина Method of high vicous oil and bitumen deposits development
RU100553U1 (en) * 2009-06-17 2010-12-20 ООО "ПечорНИПИнефть" High-viscous oil field development device
RU2455476C1 (en) * 2010-12-20 2012-07-10 Рауф Нухович Рахманов Method of heavy oil production
CA2853432A1 (en) * 2013-06-05 2014-12-05 Chan-Hee Park Single pipe-type bitumen mining system for a simultaneously supplying heat and performing bitumen extraction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458945A (en) * 1981-10-01 1984-07-10 Ayler Maynard F Oil recovery mining method and apparatus
RU2267604C1 (en) * 2005-03-09 2006-01-10 Аркадий Анатольевич Боксерман Mine oil field development method
RU2330950C1 (en) * 2006-12-11 2008-08-10 Открытое акционерное общество "Татнефть" им. В.Д. Шашина Method of high vicous oil and bitumen deposits development
RU100553U1 (en) * 2009-06-17 2010-12-20 ООО "ПечорНИПИнефть" High-viscous oil field development device
RU2455476C1 (en) * 2010-12-20 2012-07-10 Рауф Нухович Рахманов Method of heavy oil production
CA2853432A1 (en) * 2013-06-05 2014-12-05 Chan-Hee Park Single pipe-type bitumen mining system for a simultaneously supplying heat and performing bitumen extraction

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