Automatic monitoring system for reinjection water of offshore production platform

Abstract

The utility model discloses an automatic monitoring system for reinjection water of an offshore production platform. The automatic monitoring system comprises a water sampling mechanism, a water distribution mechanism, a monitoring mechanism and a processing mechanism, the water sampling mechanism comprises a water source and a water sampling pump; the water distribution mechanism comprises a main pipeline and three branch pipelines, a water distribution valve is arranged between the main pipeline and the three branch pipelines, and the other ends of the three branch pipelines are all communicated with a water collection valve; the monitoring mechanism comprises a shunt valve I, a shunt valve II and a shunt valve III which are respectively arranged on the three branch pipelines; the shunt valve I is respectively connected with a suspended matter analyzer, a dissolved oxygen analyzer and a corrosion detector; the shunt valve II is connected with a particulate matter analyzer; the shunt valve III is connected with an oil-in-water analyzer; and the treatment mechanism comprises a collecting tank communicated with the water collecting valve and a wastewater treatment device. The utility model can effectively prevent the quality of reinjected water from not reaching the standard, reduce the pollution to an underground water layer, improve the effectiveness of data, reduce the labor investment, improve the yield of an oil well and ensure the long-period operation of the oil field.

Description

Technical Field

[0001] The utility model belongs to the field of oil and gas field development, and in particular relates to an automatic monitoring system for reinjection water of an offshore oil production platform. Background Art

[0002] In the development of offshore oil fields, water injection wells are usually arranged according to certain rules to maintain formation pressure and improve recovery, and the quality of reinjection water must meet relevant standards. At present, the quality of reinjection water is usually measured by on-site sampling and laboratory analysis, which has a series of shortcomings such as low monitoring frequency, poor data timeliness, and high labor input. Therefore, it is urgent to solve the problem of automatic monitoring of reinjection water. Utility Model Content

[0003] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide an automatic monitoring system for reinjection water of an offshore oil production platform.

[0004] The utility model is realized by the following technical solutions:

[0005] An automatic monitoring system for reinjection water of an offshore oil production platform comprises a water production mechanism, a water distribution mechanism, a monitoring mechanism and a processing mechanism; the water production mechanism comprises a water source and a water production pump connected through pipelines; the water distribution mechanism comprises a main pipeline and three branch pipelines arranged in parallel, a water distribution valve is arranged between the main pipeline and the three branch pipelines, and the other ends of the three branch pipelines are all connected to a water collecting valve; the monitoring mechanism comprises a No. Ⅰ water diversion valve, a No. Ⅱ water diversion valve and a No. Ⅲ water diversion valve respectively arranged on the three branch pipelines; the No. Ⅰ water diversion valve is connected to a suspended matter analyzer, a dissolved oxygen analyzer and a corrosion detector respectively; a particle analyzer is arranged on the pipeline between the No. Ⅱ water diversion valve and the water collecting valve; an oil-in-water analyzer is arranged on the pipeline between the No. Ⅲ water diversion valve and the water collecting valve; the processing mechanism comprises a collection tank connected to the water collecting valve and a wastewater treatment device.

[0006] In the above technical scheme, a control mechanism is also included, which includes an industrial computer, and the industrial computer is electrically connected to the water collection pump, water distribution valve, water diversion valve No. Ⅰ, water diversion valve No. Ⅱ, water diversion valve No. Ⅲ, suspended matter analyzer, dissolved oxygen analyzer, corrosion detector, particulate matter analyzer, oil in water analyzer and water collection valve.

[0007] In the above technical solution, the suspended matter analyzer, dissolved oxygen analyzer and corrosion detector all adopt a probe type structure.

[0008] In the above technical solution, the suspended matter analyzer, dissolved oxygen analyzer and corrosion detector are all connected to the No. 1 water diversion valve through a three-way pipe.

[0009] The beneficial effects of the utility model are:

[0010] The utility model provides an automatic monitoring system for reinjection water of an offshore oil production platform, which can effectively avoid the reinjection water quality not meeting the standard, reduce the pollution to the groundwater layer, improve the validity of data, and at the same time reduce the labor input, increase the output of oil wells, and ensure the long-term operation of the oil field. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] in:

[0013] 1. Water source; 2. Water collection pump; 3. Water distribution valve; 4. Water diversion valve No. I; 5. Water diversion valve No. II; 6. Water diversion valve No. III; 7. Suspended matter analyzer; 8. Dissolved oxygen analyzer; 9. Corrosion detector; 10. Particle analyzer; 11. Oil in water analyzer; 12. Water collection valve; 13. Collection tank.

[0014] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0016] like Figure 1 As shown, an automatic monitoring system for reinjection water of an offshore oil production platform includes a water production mechanism, a water distribution mechanism, a monitoring mechanism and a processing mechanism;

[0017] The water collection mechanism comprises a water source 1 and a water collection pump 2 connected by a pipeline;

[0018] The water distribution mechanism comprises a main pipeline and three branch pipelines arranged in parallel, a water distribution valve 3 is arranged between the main pipeline and the three branch pipelines, and the other ends of the three branch pipelines are all connected to the water collection valve 12;

[0019] The monitoring mechanism includes a No. I water diversion valve 4, a No. II water diversion valve 5 and a No. III water diversion valve 6 respectively arranged on three branch pipes;

[0020] The No. Ⅰ water diversion valve 4 is connected to the suspended matter analyzer 7, the dissolved oxygen analyzer 8 and the corrosion detector 9 respectively;

[0021] A particle analyzer 10 is provided on the pipeline between the water diversion valve 5 and the water collection valve 12;

[0022] An oil-in-water analyzer 11 is provided on the pipeline between the water diverter valve 6 and the water collecting valve 12;

[0023] The treatment mechanism includes a collection tank 13 connected to the water collection valve 12 and a wastewater treatment device. The collection tank 13 collects wastewater discharged from each analysis unit. The wastewater treatment device regularly treats the wastewater in the collection tank 13, and the wastewater is sent to the closed discharge system after the wastewater meets the treatment standards.

[0024] The automatic monitoring system for reinjection water of the offshore oil production platform also includes a control mechanism, which includes an industrial computer. The industrial computer is electrically connected to various equipment to complete the system water collection and distribution control according to a pre-set program, and start a series of actions such as water sample measurement, instrument calibration, zero point verification, range verification, and cleaning.

[0025] In this embodiment, the water sampling mechanism adopts a self-priming pump to sample water, thereby ensuring that the collected water sample is representative and that the physical and chemical properties of the water sample do not change in the transmission pipeline.

[0026] In this embodiment, the water distribution valve 3 and the water collection valve 12 both adopt a four-way structure and are connected to the pipeline through threads.

[0027] In this embodiment, the suspended matter analyzer 7, dissolved oxygen analyzer 8 and corrosion detector 9 all adopt a probe structure, are installed in a three-way pipe, and the probe and analyzer are threadedly connected and built into the three-way pipe. The above are all conventional instrument installation methods. The flow of water samples from left to right ensures the flow rate requirements of suspended matter, dissolved oxygen and corrosion monitoring.

[0028] The monitoring mechanism of the utility model is provided with three parallel pipelines, one of which completes the monitoring of suspended matter, dissolved oxygen and oil in water in the sample; the second completes the monitoring of particulate matter in the sample; and the third completes the monitoring of oil in water in the sample, thereby realizing the automation of offshore oilfield reinjection water monitoring.

[0029] The utility model can effectively avoid the substandard quality of reinjected water, reduce the pollution to the groundwater layer, improve the validity of data, and at the same time reduce the input of labor, increase the output of oil wells, and ensure the long-term operation of the oil field.

[0030] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. An automatic monitoring system for reinjection water of an offshore oil production platform, characterized in that: The invention comprises a water collection mechanism, a water distribution mechanism, a monitoring mechanism and a treatment mechanism; the water collection mechanism comprises a water source (1) and a water collection pump (2) connected by pipelines; the water distribution mechanism comprises a main pipeline and three branch pipelines arranged in parallel, a water distribution valve (3) is arranged between the main pipeline and the three branch pipelines, and the other ends of the three branch pipelines are all connected to a water collection valve (12); the monitoring mechanism comprises a No. I water distribution valve (4), a No. II water distribution valve (5) and a No. III water distribution valve (6) respectively arranged on the three branch pipelines; the No. I water distribution valve (4) is respectively connected to a suspended matter analyzer (7), a dissolved oxygen analyzer (8) and a corrosion detector (9); a particle analyzer (10) is arranged on the pipeline between the No. II water distribution valve (5) and the water collection valve (12); and an oil-in-water analyzer (11) is arranged on the pipeline between the No. III water distribution valve (6) and the water collection valve (12); the treatment mechanism comprises a collection tank (13) connected to the water collection valve (12) and a wastewater treatment device.

2. The automatic monitoring system for reinjection water of an offshore oil production platform according to claim 1 is characterized in that: The invention also comprises a control mechanism, wherein the control mechanism comprises an industrial computer, and the industrial computer is electrically connected to the water collection pump (2), the water distribution valve (3), the No. I water diversion valve (4), the No. II water diversion valve (5), the No. III water diversion valve (6), the suspended matter analyzer (7), the dissolved oxygen analyzer (8), the corrosion detector (9), the particle analyzer (10), the oil in water analyzer (11) and the water collection valve (12).

3. The automatic monitoring system for reinjection water of an offshore oil production platform according to claim 1 is characterized in that: The suspended matter analyzer (7), dissolved oxygen analyzer and corrosion detector (9) all adopt a probe-type structure.

4. The automatic monitoring system for reinjection water of an offshore oil production platform according to claim 1 is characterized in that: The suspended matter analyzer (7), dissolved oxygen analyzer and corrosion detector (9) are all connected to the No. 1 water diversion valve (4) via a three-way pipeline.

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