CN214091823U - Accurate water injection system of oil field low injection well - Google Patents
Accurate water injection system of oil field low injection well Download PDFInfo
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- CN214091823U CN214091823U CN202023316637.1U CN202023316637U CN214091823U CN 214091823 U CN214091823 U CN 214091823U CN 202023316637 U CN202023316637 U CN 202023316637U CN 214091823 U CN214091823 U CN 214091823U
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Abstract
The utility model belongs to the technical field of the oil field water injection, an accurate water injection system of oil field low notes well is disclosed. The system comprises a single well water inlet pipe, a water inlet cutting gate, a spiral multifunctional flowmeter, a water injection cutting gate, a temperature transmitter, an oil pressure transmitter and a well mouth of a water well which are sequentially connected; the well head comprises a Christmas tree; the Christmas tree comprises a plug, a small four-way joint, a production gate, a production emptying gate, a main gate, a large four-way joint, a casing well washing gate and a casing pressure measuring emptying gate; the sleeve pressure measuring and emptying gate is connected with a sleeve pressure transmitter; the days of winter production of the water injection well can be prolonged, and the phenomenon that the well head of the low injection well is frozen and the pipeline is frozen in the winter production process is prevented; the aims of less closing of the well, no closing of the well and more water injection are achieved. The development effect of the well layer of the low-injection area of the oil field is improved.
Description
Technical Field
The utility model belongs to the technical field of the oil field water injection, the utility model relates to an accurate water injection system of oil field low notes well.
Background
A low injection well is a production well with daily injection capacity below 30 cubic meters. Due to the lack of accurate measurement and the inability of real-time monitoring of dynamic data in production management, such wells are forced to take line-sweeping and well-closing measures before entering winter to prevent the danger of frost cracking of the well head and the pipelines of the water well exposed on the ground. However, the anti-freezing well shut-in measure seriously influences the development effect of the well layer in the low-injection area of the oil field, and increases the staged workload and the production cost.
Currently, oil fields have entered the development of ultra-high water cut periods and simultaneously entered the era of accurate metering. For an oil field which uses water to replace oil, particularly for the development of a well layer in a low-permeability and low-injection area, effective development can be improved only by realizing scientific water injection.
To some extent, the size of the water injection volume has a significant impact on benefit development. Therefore, we are objectively required to more accurately analyze the water injection interval and the water injection quantity; the current fine adjustment requirement can be met only by achieving higher metering precision.
Currently, the accuracy of the water meter in use in an oil field (accuracy: first grade; lower limit of flow range: 0.8 m)3H is used as the reference value. Accuracy: second-stage; lower limit of flow range: 0.28m3The/h) is lower. This directly affects the accurate injection of the low injection well, and the accuracy and the lower limit of the flow range cannot meet the requirement of accurate measurement in the low injection area.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides an accurate water injection system for a low injection well in an oil field, which can prolong the production days of the low injection well in winter and prevent the low injection well from freezing the well and freezing the pipeline in the production process in winter; the aims of less closing of the well, no closing of the well and more water injection are achieved. Especially improve the development effect of the well layer in the low-injection area.
The utility model provides a technical scheme that its technical problem adopted is: an oil field low injection well accurate water injection system comprises a single well water inlet pipe, a water inlet cutting gate, a spiral multifunctional flowmeter, a water injection cutting gate, a temperature transmitter, an oil pressure transmitter and a water well mouth which are sequentially connected;
the well head comprises a Christmas tree; the Christmas tree comprises a plug, a small four-way joint, a production gate, a production emptying gate, a main gate, a large four-way joint, a casing well washing gate and a casing pressure measuring emptying gate;
a small cross is connected above the main gate, the horizontal two ends of the small cross are respectively connected with a production gate and a production emptying gate, a large cross is connected below the main gate, the two ends of the large cross in the horizontal direction are respectively connected with a casing well washing gate and a casing pressure measuring emptying gate, and the plug is arranged at the top of the Christmas tree; the sleeve pressure measuring and emptying gate is connected with a sleeve pressure transmitter;
the oil field low injection well accurate water injection system also comprises a data acquisition and transmission terminal; the data acquisition and transmission terminal is respectively connected with the pumping pressure transmitter, the spiral multifunctional flowmeter, the temperature transmitter, the oil pressure transmitter and the sleeve pressure transmitter through power supply communication cables; and the data acquisition and transmission terminal is connected with a solar power supply device.
The production gate and the production emptying gate are arranged on the same horizontal line and are arranged on two sides of the small four-way joint above the main gate; the casing well-flushing gate and the casing pressure-measuring emptying gate are arranged on the same horizontal line and are arranged on two sides of a large four-way joint below the main gate;
a pumping pressure transmitter is arranged at the spiral multifunctional flowmeter;
and the pumping pressure transmitter, the spiral multifunctional flowmeter, the temperature transmitter, the oil pressure transmitter and the sleeve pressure transmitter are respectively connected with the PLC system.
When the water from the water injection well passes through the injection allocation process flow, a pumping pressure transmitter and a spiral multifunctional flowmeter (the accuracy is 0.2 grade, the lower limit of the flow range is 0.2 m)3The device comprises a temperature transmitter, an oil pressure transmitter and a casing pressure transmitter, wherein the temperature transmitter, the oil pressure transmitter and the casing pressure transmitter start to work, and upload signals of a pump pressure meter, an instantaneous flow meter, an accumulated flow meter, a temperature meter, an oil pressure meter and a casing pressure meter to a meter head of a spiral multifunctional flowmeter, and upload the signals to a data acquisition transmission terminal through a meter head of the flowmeter with a 485 communication function, so that production parameters are transmitted to a production management platform of an oil extraction team in real time.
Compared with the prior art, the utility model beneficial effect who has is:
the production days of the low injection well in winter can be prolonged, and the phenomenon that the well head of the low injection well is frozen and the pipeline is frozen in the production process in winter is prevented; the purposes of less closing of the well, no closing of the well and more water injection are achieved, and the development effect of the well layer in the low injection area is improved. Compared with the prior low injection well water injection method, the method has the following advantages:
1. the utility model discloses can be in winter when temperature is 5 ~ 30 degrees below zero, through the production parameter change of the accurate water injection system of real-time supervision, the accurate analysis water injection pipeline freezes the corresponding relation of temperature and water injection instantaneous flow, and the limit of low notes well of accurate division is opened a well production and is closed a well and stop annotating winter. The prior art is that the line is swept in winter and the well is shut down and the injection is stopped.
2. The utility model discloses the spiral multifunctional flow meter degree of accuracy: grade 0.2; lower limit of flow range: 0.2m3H is used as the reference value. The prior art has the following accuracy: a first stage; lower limit of flow range: 0.8m3H is used as the reference value. Second-stage; lower limit of flow range: 0.28m3/h。
3. The utility model discloses can long-range real-time admission oil pressure, casing pressure, pumping pressure, temperature, instantaneous flow and accumulative total flow data. The prior art manually records data once a day. The pressure gauge is respectively installed and disassembled for 3 times, and the pump pressure, oil pressure and sleeve pressure data and the water meter instantaneous flow and accumulated flow data are recorded.
4. The utility model can monitor the abnormal phenomena of the water injection well in the production process in real time and give an alarm (for example, the external force is destroyed, the pipeline and the well mouth are leaked, the pressure fluctuation of the water injection pipe network and other reasons cause the change of the production parameters such as oil pressure, pump pressure, instantaneous flow and the like). The prior art is regularly patrolled by people.
5. The utility model discloses but real-time browsing production dynamic data, production operation curve and historical trend, the automatic production daily statement that generates avoids reporting by the wrong report that artifical admission data caused. The prior art consists of manual recording.
Drawings
The invention will be further described with reference to the following figures and examples:
figure 1 is the utility model discloses the accurate water injection system schematic diagram of oil field low notes well.
In the figure, 1, an incoming water direction, 2, an incoming water cut-off gate, 3, a pumping pressure transmitter, 4, a spiral multifunctional flowmeter, 5, a water injection cut-off gate, 6, a temperature transmitter, 7, an oil pressure transmitter, 8, a plug, 9, a production gate, 10, a production emptying gate, 11, a main gate, 12, a sleeve well washing gate, 13, a sleeve pressure measuring emptying gate, 14, a sleeve pressure transmitter, 15, a power supply communication cable, 16, a data acquisition and transmission terminal and 17, a solar power supply device.
Detailed Description
The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments. In the embodiment, a pumping pressure transmitter, a spiral multifunctional flowmeter, a temperature transmitter, an oil pressure transmitter and a sleeve pressure transmitter which are connected with a PLC system are not limited to a certain model; the spiral multifunctional flowmeter is not limited in model, and can realize flow measurement and feed back signals to a PLC system.
Example 1
An accurate water injection system of an oil field water injection well is shown in figure 1 and comprises a single well water inlet pipe, an inlet water cutting gate 2, a spiral multifunctional flowmeter 4, a water injection cutting gate 5, a temperature transmitter 6, an oil pressure transmitter 7 and a water well mouth which are sequentially connected;
the well head comprises a Christmas tree; the Christmas tree comprises a plug 8, a small four-way valve, a production gate 9, a production emptying gate 10, a main gate 11, a large four-way valve, a casing well washing gate 12 and a casing pressure measuring emptying gate 13;
a small cross is connected above the main gate 11, the horizontal two ends of the small cross are respectively connected with a production gate 9 and a production emptying gate 10, a large cross is connected below the main gate 11, the two ends of the large cross in the horizontal direction are respectively connected with a casing well washing gate 12 and a casing pressure measuring emptying gate 13, and the plug 8 is arranged at the top of the Christmas tree; the sleeve pressure measuring and emptying gate 13 is connected with a sleeve pressure transmitter 14; a pumping pressure transmitter 3 is arranged at the spiral multifunctional flowmeter 4;
the oil field low injection well accurate water injection system also comprises a data acquisition and transmission terminal 16; the data acquisition and transmission terminal 16 is respectively connected with the pumping pressure transmitter 3, the spiral multifunctional flowmeter 4, the temperature transmitter 6, the oil pressure transmitter 7 and the sleeve pressure transmitter 14 through power supply communication cables; the data acquisition and transmission terminal 16 is connected with a solar power supply device 17.
The production gate 9 and the production emptying gate 10 are arranged on the same horizontal line and are arranged on two sides of a small four-way joint above the main gate 11; the casing well-flushing gate 12 and the casing pressure-measuring emptying gate 13 are arranged on the same horizontal line and are arranged on two sides of a large four-way joint below the main gate 11;
and the pumping pressure transmitter 3, the spiral multifunctional flowmeter 4, the temperature transmitter 6, the oil pressure transmitter 7 and the sleeve pressure transmitter 14 are respectively connected with the PLC system.
The working process of the accurate water injection system of the oil field low injection well is as follows: closing the incoming water cutting gate 2, the water injection cutting gate 5, the emptying gate 10, the casing well washing gate 12 and the screwing plug 8. Production gate 9, main gate 11, casing manometric gate 13 are opened. The water injection station transmits high-pressure water to the incoming water cut-off gate 2 through a single-well water inlet pipe network, and the outlet pressure of the high-pressure water injection pump is larger than 15 mpa. And opening the incoming water cut-off gate 2, and slowly opening the water injection cut-off gate 5 according to the daily injection amount and the instantaneous flow of the low injection well so as to enter a normal production state. The solar power supply device 17 is started to supply 220v alternating current to the data acquisition and transmission terminal 16, and 24v direct current is supplied to the pumping pressure transmitter 3, the oil pressure transmitter 7, the sleeve pressure transmitter 14, the spiral multifunctional flowmeter 4 and the temperature transmitter 6 through the switching power supply. After the low injection well is normally produced, when water enters a water injection station and passes through an injection allocation process flow, a pumping pressure transmitter 3, a spiral multifunctional flowmeter 4, a temperature transmitter 6, an oil pressure transmitter 7 and a casing pressure transmitter 14 which are installed on the injection allocation process flow start to work, instrument signals such as pumping pressure, flow, temperature, oil pressure, casing pressure and the like are uploaded to a data acquisition and transmission terminal 16 through a signal line, and production parameters are transmitted to a production management platform of an oil recovery team in real time through the data acquisition and transmission terminal 16. The meter head of the spiral multifunctional flowmeter 4 has the functions of displaying pump pressure, oil pressure, flow and instantaneous flow, has the function of 485 communication, and uploads production parameters such as pump pressure, oil pressure, flow, instantaneous flow and the like to the data acquisition and transmission terminal 16; the production parameters of the temperature transmitter 6 and the casing pressure transmitter 14 can also be directly transmitted to the data acquisition and transmission terminal 16.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (2)
1. The utility model provides an accurate water injection system of oil field low notes well which comprises: the system comprises a single-well water inlet pipe, an inlet water cut-off gate (2), a spiral multifunctional flowmeter (4), a water injection cut-off gate (5), a temperature transmitter (6), an oil pressure transmitter (7) and a well mouth of a water well which are sequentially connected;
the well head comprises a Christmas tree; the Christmas tree comprises a plug (8), a small four-way joint, a production gate (9), a production emptying gate (10), a main gate (11), a large four-way joint, a casing well washing gate (12) and a casing pressure measuring emptying gate (13);
a small cross is connected above the main gate (11), the horizontal two ends of the small cross are respectively connected with a production gate (9) and a production emptying gate (10), a large cross is connected below the main gate (11), the horizontal two ends of the large cross are respectively connected with a casing well washing gate (12) and a casing pressure measuring emptying gate (13), and the plug (8) is arranged at the top of the Christmas tree; the sleeve pressure measuring and emptying gate (13) is connected with a sleeve pressure transmitter (14); a pumping pressure transmitter (3) is arranged at the spiral multifunctional flowmeter (4);
the oil field low-injection well accurate water injection system further comprises a data acquisition and transmission terminal (16); the data acquisition and transmission terminal (16) is respectively connected with the pumping pressure transmitter (3), the spiral multifunctional flowmeter (4), the temperature transmitter (6), the oil pressure transmitter (7) and the sleeve pressure transmitter (14) through power supply communication cables; the data acquisition and transmission terminal (16) is connected with a solar power supply device (17).
2. The accurate water injection system of the low injection well of the oil field according to claim 1, characterized in that, the production gate (9) and the production emptying gate (10) are arranged on the same horizontal line and are arranged at two sides of the small cross above the main gate (11); the casing well-flushing gate (12) and the casing pressure-measuring and emptying gate (13) are arranged on the same horizontal line and are arranged on two sides of the large four-way joint below the main gate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202023316637.1U CN214091823U (en) | 2020-12-31 | 2020-12-31 | Accurate water injection system of oil field low injection well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023316637.1U CN214091823U (en) | 2020-12-31 | 2020-12-31 | Accurate water injection system of oil field low injection well |
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| CN214091823U true CN214091823U (en) | 2021-08-31 |
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| CN202023316637.1U Active CN214091823U (en) | 2020-12-31 | 2020-12-31 | Accurate water injection system of oil field low injection well |
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