JPWO2008050645A1 - Oil extraction system and oil extraction monitoring system - Google Patents

Abstract

The present invention has been made in view of such problems, and provides an oil collection system and an oil collection monitoring system capable of performing efficient oil collection by using a pump-off signal in secondary and tertiary collection. A soccer rod pump (10) for pumping crude oil provided in the production well (2), a signal detector (12) for detecting a pump-off signal of the soccer rod pump (10), and a press-fit well (3 ), And a press-fitting pump (20) that press-fits a fluid used for secondary collection or tertiary collection, in a pumping-off signal detected by the signal detection unit (12) Based on this, the press-fitting pump (20) is operated.

Description

  The present invention relates to an oil collection system for forcibly recovering oil and an oil collection monitoring system for monitoring the oil collection system.

  When oil is extracted from underground oil fields, production is first performed using only natural oil drainage energy, or artificial oil extraction (gas lift oil extraction, pump oil extraction, etc.) that does not involve EOR, which will be described later (primary collection). .

Then, after production declines due to primary collection, water and natural gas are injected into the oil reservoir (water flooding, gas injection) to provide artificial oil drainage energy and increase the yield. (Secondary collection).

In addition, after the second collection, an enhanced oil recovery method has been employed in order to collect the oil remaining in the underground crude oil-containing layer. The enhanced recovery method is a collection method aiming at a higher replacement efficiency obtained by a normal water flooding method or a gas injection method. As an enhanced recovery method, a surfactant is added to water and oil such as petroleum and heavy oil to form a microemulsion, which is injected into an underground crude oil-containing layer to collect crude oil, a polyacrylamide, polyalkyl acrylate A polymer attack method is used in which water-soluble polymer substances such as polyalkyl methacrylate, polyacrylonitrile, and xanthan gum are added to injection water to increase the viscosity of water and improve the oil collection rate (for example, Patent Document 1). reference)). A microbial attack using microorganisms is also used. The microbial attack method is a method in which a function similar to that of the EOR technique is expected in the underground crude oil-containing layer using a microorganism that produces a metabolite such as a polymer, a surfactant, carbon dioxide gas, methane gas, and acid ( For example, see Patent Document 2).
Thus, the conventional oil collection method makes full use of the extraction method to efficiently extract oil.

Incidentally, a soccer rod pump 300 as shown in FIG. 3 is used as a pump for collecting oil. The soccer rod pump 300 is connected to a plunger (not shown) at the tip of the rod 301 and lowered into the tubing, and the rod is moved up and down by the ground equipment, and the movement is transmitted to the plunger to collect oil. Because of its simplicity, it is most widely used in onshore oil fields (see, for example, Patent Document 3).
The soccer rod pump may be pumped off. As a control method, a technique for detecting and controlling the pump off occurrence under a predetermined condition is known (for example, see Patent Document 4).
JP-A-11-236556 (page 2-5) Japanese Patent Publication No. 6-13699 (pages 2-9) Japanese Patent No. 3184229 (pages 9-17, FIG. 7) WO00 / 66892 (page 9-17)

In recent years, when an oil field is developed, which principle of sampling method is applied at what point in time to determine the production plan with the highest overall economic efficiency has been studied. However, there are cases where a clear solution cannot be obtained, and an optimal production plan has not always been obtained.
The present invention has been made in view of such problems, and provides an oil collection system and an oil collection monitoring system capable of performing efficient oil collection by using a pump-off signal in secondary and tertiary collection. The purpose is to do.

In order to solve the above problem, the present invention is configured as follows.
The invention described in claim 1 is provided in a production well and a soccer rod pump that pumps crude oil, a signal detection unit that detects a pump-off signal of the soccer rod pump, and a press-fit well. In an oil collection system comprising a press-in pump for press-fitting a fluid used for secondary collection or tertiary collection, the press-fit pump is operated based on a pump-off signal detected by the signal detection unit. To do.
According to a second aspect of the present invention, the signal detection unit is an inverter that drives a power source of the soccer rod pump.
According to a third aspect of the present invention, the signal detection unit is a host controller of an inverter that drives a power source of the soccer rod pump.
According to a fourth aspect of the present invention, the pump-off signal is transmitted to an inverter that drives a power source of the press-fit pump.
The invention according to claim 5 is characterized in that the fluid is water, gas or a surfactant.
The invention described in claim 6 is characterized in that a microorganism is used instead of the fluid.
According to a seventh aspect of the present invention, there is provided a soccer rod pump for pumping crude oil provided in a production well, a signal detector for detecting a pump-off signal of the soccer rod pump, and a press-fit well. And a press-fitting pump that press-fits a fluid used for secondary collection or tertiary collection, and the signal detection unit detects the pump-off signal and based on the detected pump-off signal The press-fitting pump is operated.
The invention according to claim 8 is characterized in that the signal detection unit is an inverter that drives a power source of the soccer rod pump.
Further, the invention described in claim 9 is characterized in that the signal detection unit is a host controller of an inverter that drives a power source of the soccer rod pump.
The invention described in claim 10 is characterized in that the pump-off signal is transmitted to an inverter that drives a power source of the press-fitting pump.
The invention according to claim 11 is characterized in that the fluid is water, gas or a surfactant.
The invention described in claim 12 is characterized in that a microorganism is used instead of the fluid.
The invention according to claim 13 is a soccer rod pump that is provided in a production well and pumps up crude oil, an inverter that drives the soccer rod pump, a remote monitoring unit that operates the inverter, A first wireless communication unit connected to a remote unit, a second wireless communication unit for wireless communication with the wireless communication unit, and a computer connected to the wireless communication unit It is.
The invention described in claim 14 is characterized in that the command is transmitted in a predetermined cycle.
The invention according to claim 15 is a soccer rod pump that is installed in a production well and pumps up crude oil, an inverter that drives the soccer rod pump, a remote monitoring unit that operates the inverter, In an oil collection monitoring system comprising: a first wireless communication unit connected to a remote unit; a second wireless communication unit for wireless communication with the wireless communication unit; and a computer connected to the wireless communication unit. A predetermined command is transmitted from the computer to the inverter via the second wireless communication unit, and the remote monitoring unit receives the predetermined command via the first wireless communication unit, and The inverter is operated according to a command, and the result of the operation is transmitted to the computer via the first and second wireless communication units. It is intended.
The invention according to claim 16 is characterized in that the command is transmitted in a predetermined cycle.

According to the invention described in claims 1 to 12, in the secondary and tertiary collection, the pump for press-fitting water, gas, surfactant (fluid) or microorganism and the soccer rod pump for collecting oil are pumped off of the inverter. Since cooperative operation can be performed using the detection signal, efficient oil collection is possible.
In addition, according to the invention described in claims 13 to 16, since monitoring is performed by wireless communication, it is possible to produce and maintain crude oil at a remote location.

1 is a configuration diagram of an oil collection system showing a first embodiment of the present invention. Configuration diagram of oil extraction monitoring system showing a second embodiment of the present invention Illustration of a conventional soccer rod pump

Explanation of symbols

1 Underground crude oil content layer (oil layer)
2 Production Well 3 Press-In Well 10 Soccer Rod Pump 11 Motor 12 First Inverter 20 Press-In Pump 21 Motor 22 Second Inverter 23 Signal Transmission Unit 51 Communication Interface 52 Remote Monitoring Unit 53 Wireless Communication Unit 60 Central Monitoring System 61 Wireless Communication Unit 62 Communication Interface 63 Computer 300 Soccer Rod Pump 301 Rod

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of an oil collection system according to the present invention. In the following, oil extraction will be described as being based on water flooding, but it can be applied to any flooding as long as it is based on secondary and tertiary harvesting.
In the figure, 1 is an underground crude oil containing layer (oil layer). Reference numeral 2 denotes a production well that is a well for collecting oil. 3 is a pressure well for injecting water.
10 is a soccer rod pump that pumps crude oil. A motor 11 serves as a power source for the soccer rod pump 10. Reference numeral 12 denotes a first inverter that drives the motor 11. The first inverter 12 can detect a pump-off signal by a known technique.
Reference numeral 20 denotes a press-fitting pump for injecting water. A motor 21 serves as a power source for the press-fitting pump 20. Reference numeral 22 denotes a second inverter that drives the motor 21. A signal transmission unit 23 transmits a pump-off signal from the first inverter 12 to the second inverter 22, and includes a transmitter, a signal line, and a receiver (not shown).

The operation of the oil collection system of the present invention with the above configuration will be described below.
If the crude oil is continuously pumped up by the soccer rod pump 10, the oil reservoir pressure gradually decreases, and the oil extraction efficiency gradually decreases. And when an oil layer pressure falls, it will be in the state where pump-off is easy to generate | occur | produce.
Here, when the pump-off signal is detected in the first inverter 12, this signal is transmitted to the second inverter 22 via the signal transmission unit 23. That is, the first inverter is a pump-off signal detection unit. When this pump-off signal is transmitted, the second inverter 22 starts operation and press-fits water (fluid).
As a result, the oil reservoir pressure is restored, so that stable oil collection in the production well becomes possible.

In this embodiment, the first inverter detects the pump-off, but it may be detected by a host controller (not shown) or directly by a sensor provided in the soccer rod pump. Further, the pump-off signal of the first inverter is directly transmitted to the second inverter 22, but it is only necessary that the second inverter can be operated based on the pump-off signal. That is, the pump off may be detected by some means, and water may be injected based on this.
Furthermore, even if the second inverter is not started immediately after the pump-off is detected, the operation may be started after detecting a predetermined number of times, and the operation is started when the number of detections per unit time exceeds a predetermined value. You may do it.

  As described above, in secondary and tertiary collection, a pump that press-fits water, gas, surfactant (fluid) or microorganisms and a soccer rod pump that collects oil are coordinated using the pump-off detection signal of the inverter. This makes it possible to efficiently collect oil.

FIG. 2 is a block diagram showing the oil collection monitoring system of the second embodiment. In addition, since the same code | symbol is attached | subjected to the same thing as 1st Example, description is abbreviate | omitted.
In the figure, reference numeral 51 denotes a communication interface, which is a communication interface card for the first inverter 12 to transmit / receive data to / from a remote monitoring unit described later. A remote monitoring unit 52 receives a command from the central monitoring system and operates the inverter in accordance with the content of the command. A wireless communication unit 53 is used for transmitting and receiving wireless signals.
A central monitoring system 60 includes a wireless communication unit 61, a communication interface 62, and a computer 63.

When a predetermined command is transmitted from the computer 63 under the above configuration, the command data is transmitted to the remote monitoring unit 52 via the wireless communication units 61 and 53.
The remote monitoring unit 52 operates the inverter according to the command and returns the result data to the computer 63.
For example, when a rotational speed read command is transmitted from the computer 63, the remote monitoring unit reads information on the rotational speed managed by the inverter and returns it to the computer 63.
If the command is transmitted periodically, the resulting data can be periodically obtained, so that the data can be monitored.
As described above, the operation status of the inverter is regularly checked by the computer 63, and the oil collection amount / transition of the entire oil field, the oil collection amount / change of each soccer rod / pump, the operation status, the maintainability, the availability ( availability) and the like can be monitored and managed.

  In this embodiment, the communication interface is provided inside the first inverter, but may be provided outside.

  Thus, since monitoring is performed by wireless communication, crude oil production and maintenance management can be performed at a remote location.

Claims (16)

A soccer rod pump for pumping crude oil installed in the production well, a signal detection unit for detecting a pump-off signal of the soccer rod pump, and a secondary injection or tertiary sampling provided for the injection well. In an oil collection system comprising a press-in pump for press-fitting a fluid used for storage,
An oil collection system for operating the press-fitting pump based on a pump-off signal detected by the signal detection unit. 2. The oil collection system according to claim 1, wherein the signal detection unit is an inverter that drives a power source of the soccer rod pump. 2. The oil collection system according to claim 1, wherein the signal detection unit is a host controller of an inverter that drives a power source of the soccer rod pump. The oil pumping system according to claim 1, wherein the pump-off signal is transmitted to an inverter that drives a power source of the press-fitting pump. The oil collection system according to claim 1, wherein the fluid is water, gas, or a surfactant. The oil collection system according to claim 1, wherein a microorganism is used instead of the fluid. A soccer rod pump for pumping crude oil installed in the production well, a signal detection unit for detecting a pump-off signal of the soccer rod pump, and a secondary injection or tertiary sampling provided for the injection well. In an oil collection system comprising a press-in pump for press-fitting a fluid used for storage,
The signal detector detects the pump-off signal;
An oil collection method comprising operating the press-fitting pump based on the detected pump-off signal. 8. The oil collection system according to claim 7, wherein the signal detection unit is an inverter that drives a power source of the soccer rod pump. 8. The oil collection system according to claim 7, wherein the signal detection unit is a host controller of an inverter that drives a power source of the soccer rod pump. The oil pumping system according to claim 7, wherein the pump-off signal is transmitted to an inverter that drives a power source of the press-fitting pump. The oil collection system according to claim 7, wherein the fluid is water, gas, or a surfactant. 8. The oil collection system according to claim 7, wherein a microorganism is used instead of the fluid. A soccer rod pump that is installed in the production well and pumps up crude oil,
An inverter for driving the soccer rod pump;
A remote monitoring unit for operating the inverter;
A first wireless communication unit connected to the remote unit;
A second wireless communication unit for wireless communication with the wireless communication unit;
An oil collection monitoring system comprising: a computer connected to the wireless communication unit. The oil collection monitoring system according to claim 13, wherein the command is transmitted at a predetermined cycle. A soccer rod pump installed in a production well for pumping crude oil, an inverter for driving the soccer rod pump, a remote monitoring unit for operating the inverter, and a first wireless communication unit connected to the remote unit An oil collection monitoring system comprising: a second wireless communication unit for wireless communication with the wireless communication unit; and a computer connected to the wireless communication unit.
A predetermined command is transmitted from the computer to the inverter via the second wireless communication unit,
The remote monitoring unit receives the predetermined command via the first wireless communication unit;
Operating the inverter according to the predetermined command,
The oil collection monitoring method, wherein the result of the operation is transmitted to the computer via the first and second wireless communication units. The oil collection monitoring method according to claim 15, wherein the command is transmitted at a predetermined cycle.

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