Metering device for crude oil dynamic handover

Abstract

The invention discloses a metering device for crude oil dynamic handover. The system comprises a volumetric flowmeter intelligent digital display conversion device, a first pressure transmitter, a first temperature transmitter, a hub-spoke type multi-point sampler, a skid-mounted unit, a data acquisition calculator and a data display calculation monitoring system, compared with the prior art, the metering device for crude oil dynamic handover has the advantages that the density, the water content, the flow, the pressure and the temperature of crude oil can be collected online in real time, the oil handover amount is calculated accordingly, the automation degree is high, and nuclear production and allocation of the crude oil are supported through scientific and objective data; and the whole process has no leakage risk, so that the safety is good. The number of workers can be reduced, the labor intensity of workers is relieved, and therefore the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield storage and transportation and ground engineering, and in particular relates to a metering device for dynamic transfer of crude oil. Background Art

[0002] In oilfield production, crude oil transportation involves dehydrating the crude oil collected from each oil well and injecting it into a crude oil storage tank, then transporting it step by step to the next level joint station through the oil pipeline, and finally collecting it into the crude oil storage and transportation depot for storage and sales. Multiple parallel flow meters are installed on each oil pipeline to prevent damage to one of the flow meters and affect normal production. The dynamic handover of crude oil is a key task in calculating crude oil production. Over the years, the dynamic handover of crude oil has always relied on manual timed sampling, testing and measurement, and then manual calculations were performed in accordance with GB / T 9109.5-2017 "Dynamic Measurement of Petroleum and Liquid Petroleum Products Part 5: Oil Quantity Calculation".

[0003] Obviously, manual handover measurement has problems such as poor real-time performance, low monitoring level, and inability to grasp the changes in oil products in real time; and the labor intensity of the staff is high and there are many measurement personnel. Influenced by various factors such as the staff's laboratory operation level, experience, equipment and sampling frequency, in fact, there are still differences in the consistency of the laboratory and measurement results of each joint station, which has brought impacts on production and operation. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide a metering device for dynamic transfer of crude oil.

[0005] In order to achieve the above-mentioned purpose, the metering device for dynamic transfer of crude oil provided by the present invention includes an intelligent digital display conversion device of a volumetric flowmeter, a first pressure transmitter, a first temperature transmitter, a hub-and-spoke multi-point sampler, a skid-mounted unit, a data acquisition calculator and a data display calculation monitoring system; wherein, the first pressure transmitter and the first temperature transmitter are installed on the oil pipeline; a volumetric flowmeter intelligent digital display conversion device is installed on each volumetric flowmeter of the oil pipeline, which is used to calculate the volume of crude oil flowing through the flowmeter within a fixed time period according to the difference in the base number of the flowmeter before and after a certain time period; the skid-mounted unit is connected to the hub-and-spoke multi-point sampler through a sampling pipeline; the hub-and-spoke multi-point sampler is connected to the oil pipeline through a flange, which is used to ensure that the crude oil flowing through the skid-mounted unit is representative; the data acquisition calculator is electrically connected to the intelligent digital display conversion device of the volumetric flowmeter, the first pressure transmitter, the first temperature transmitter, the skid-mounted unit and the data display calculation monitoring system respectively.

[0006] The skid-mounted unit includes a sampling pump, a second pressure transmitter, an online water content analyzer, an online density meter, a second temperature transmitter, a control system explosion-proof connector, a sampling pipeline and a water content analyzer processing unit; wherein, the two ends of the sampling pipeline are respectively connected to the outlet and the inlet of the hub-assisted multi-point sampler; at least two sampling pumps are installed on the sampling pipeline in parallel, and serve as a backup for each other, and are used as a circulating power source for the crude oil sample to flow through the skid-mounted unit for detection and then flow back to the oil pipeline; the second pressure transmitter, the online water content analyzer, the online density meter and the second temperature transmitter are installed on the sampling pipeline; the control system explosion-proof connector is electrically connected to the sampling pump, the second pressure transmitter, the online density meter, the second temperature transmitter and the data acquisition computer, respectively, and is electrically connected to the online water content analyzer through the water content analyzer processing unit, and is used to collect data and operating status of all sensors in the skid-mounted unit and upload them to the data acquisition computer.

[0007] The skid-mounted unit also includes a sampling valve and an artificial sampling pipeline; the artificial sampling pipeline is connected to the sampling pipeline, and the sampling valve is installed on the artificial sampling pipeline and serves as a sampling port for artificial sampling and testing.

[0008] The metering device for dynamic transfer of crude oil provided by the present invention has the following beneficial effects: it can collect the density, water content, flow rate, pressure and temperature of crude oil in real time online, and calculate the transfer oil volume accordingly, so it has a high degree of automation, and supports the nuclear production allocation of crude oil through scientific and objective data; the whole process has no risk of leakage, so it has good safety. It can reduce the number of workers, reduce the labor intensity of workers, and thus reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the composition of the metering device for dynamic transfer of crude oil provided by the present invention.

[0010] Figure 2 This is a schematic diagram of the skid-mounted unit in the metering device for dynamic transfer of crude oil provided by the present invention. DETAILED DESCRIPTION

[0011] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0012] like Figure 1-Figure 2As shown, the metering device for dynamic transfer of crude oil provided by the present invention includes a volumetric flowmeter intelligent digital display conversion device 1, a first pressure transmitter 2, a first temperature transmitter 3, a hub-and-spoke multi-point sampler 4, a skid-mounted unit 5, a data acquisition calculator 6 and a data display calculation monitoring system 7; wherein, the first pressure transmitter 2 and the first temperature transmitter 3 are installed on the oil pipeline 8; a volumetric flowmeter intelligent digital display conversion device 1 is installed on each volumetric flowmeter of the oil pipeline 8, which is used to calculate the volume of crude oil flowing through the flowmeter within a fixed time period according to the difference in the base number of the flowmeter before and after a certain time period; the skid-mounted unit 5 is connected to the hub-and-spoke multi-point sampler 4 through a sampling pipeline 5-8; the hub-and-spoke multi-point sampler 4 is connected to the oil pipeline 8 through a flange, which is used to ensure that the crude oil flowing through the skid-mounted unit 5 is representative; the data acquisition calculator 6 is electrically connected to the volumetric flowmeter intelligent digital display conversion device 1, the first pressure transmitter 2, the first temperature transmitter 3, the skid-mounted unit 5 and the data display calculation monitoring system 7 respectively.

[0013] The skid-mounted unit 5 includes a sampling pump 5-1, a second pressure transmitter 5-2, an online water content analyzer 5-3, an online density meter 5-4, a second temperature transmitter 5-5, a control system explosion-proof connector 5-7, a sampling pipeline 5-8 and a water content analyzer processing unit 5-9; wherein, both ends of the sampling pipeline 5-8 are respectively connected to the outlet and the inlet of the hub-assisted multi-point sampler 4; at least two sampling pumps 5-1 are installed in parallel on the sampling pipeline 5-8, and serve as a backup for each other, and are used as a circulating power for the crude oil sample to flow through the skid-mounted unit 5 for detection and then flow back to the oil pipeline 8 Source; the second pressure transmitter 5-2, the online water content analyzer 5-3, the online density meter 5-4 and the second temperature transmitter 5-5 are installed on the sampling pipe 5-8; the control system explosion-proof connector 5-7 is electrically connected to the sampling pump 5-1, the second pressure transmitter 5-2, the online density meter 5-4, the second temperature transmitter 5-5 and the data acquisition computer 6 respectively, and is electrically connected to the online water content analyzer 5-3 through the water content analyzer processing unit 5-9, which is used to collect the data and operating status of all sensors in the skid-mounted unit 5 and upload them to the data acquisition computer 6.

[0014] The skid-mounted unit 5 also includes a sampling valve 5-6 and a manual sampling pipeline 5-10; the manual sampling pipeline 5-10 is connected to the sampling pipeline 5-8, and the sampling valve 5-6 is installed on the manual sampling pipeline 5-10, which is used as a sampling port for manual sampling and testing.

[0015] The working principle of the crude oil dynamic transfer metering device provided by the present invention is described as follows:

[0016] In oil field production, when crude oil flows through the flow meter on the oil pipeline 8, under the control of the data acquisition calculator 6, the volumetric flow meter intelligent digital display conversion device 1 installed on the flow meter will calculate the volume of crude oil flowing through the flow meter within a fixed time according to the difference in the base number of the flow meter before and after a certain time period, and then transmit it to the data acquisition calculator 6; the first pressure transmitter 2 and the first temperature transmitter 3 will respectively detect the pressure and temperature of the crude oil in the oil pipeline 8, and then transmit them to the data acquisition calculator 6; turn on the sampling pump 5-1, at this time, part of the crude oil in the oil pipeline 8 will flow into the sampling pipeline 5-8 evenly through the outlet of the hub-and-spoke multi-point sampler 4 as a sample, and then flow back to the oil pipeline 8 through the inlet of the hub-and-spoke multi-point sampler 4; in this process, the second pressure transmitter 2 and the first temperature transmitter 3 will detect the pressure and temperature of the crude oil in the oil pipeline 8 respectively, and then transmit them to the data acquisition calculator 6; turn on the sampling pump 5-1, and then ... the second pressure transmitter 2 and the first temperature transmitter 3 will detect the pressure and temperature of the crude oil in the oil pipeline 8 respectively, and then transmit them to the data acquisition calculator 6; turn on the sampling pump 5-1, and then the second pressure transmitter 2 and the first temperature transmitter 3 will detect the pressure and temperature of the crude oil in the oil pipeline 8 respectively, and then transmit them to the data acquisition The transmitter 5-2, the online moisture analyzer 5-3, the online density meter 5-4 and the second temperature transmitter 5-5 respectively detect the pressure, moisture content, density and temperature of the sample in the sampling pipe 5-8, and then transmit the moisture content detection data to the control system explosion-proof connector 5-7 after being processed by the moisture analyzer processing unit 5-9, and directly transmit the pressure, density and temperature detection data to the control system explosion-proof connector 5-7, which is then transmitted to the data acquisition calculator 6 by the control system explosion-proof connector 5-7; finally, the data acquisition calculator 6 calculates the amount of oil to be transferred by combining the detection data of the volumetric flow meter intelligent digital display conversion device 1, the first pressure transmitter 2 and the first temperature transmitter 3, and displays them synchronously on the data display calculation monitoring system 7, which is convenient for the duty room staff to monitor. In addition, if the device fails and manual sampling is required, it is very convenient to open the sampling valve 5-6 on the manual sampling pipe 5-10.

[0017] The method for calculating the transfer oil volume by the data acquisition calculator 6 is as follows:

[0018] The standard density ρ20 of the oil product is calculated by looking up the table according to the temperature data detected by the second temperature transmitter 5-5 in the skid-mounted unit 5 and the density data detected by the online density meter 5-4; the volume temperature correction coefficient Ctl of the oil product is calculated by looking up the table according to the temperature data detected by the first temperature transmitter 3 on the oil pipeline 8 and the standard density ρ20 of the oil product; the density ρ15 is calculated by looking up the table according to the standard density ρ20 of the oil product; the compression coefficient F×10 is calculated by looking up the table according to the density ρ15 and the temperature data detected by the first temperature transmitter 3 -6 ; According to the pressure data detected by the first pressure transmitter 2 on the oil pipeline 8 and the compression coefficient F×10 -6Calculate the oil volume pressure correction coefficient Cpl; calculate the standard volume of the handover according to the crude oil volume output by the intelligent digital display conversion device 1 of the volumetric flowmeter, the above-mentioned oil volume temperature correction coefficient Ctl and the oil volume pressure correction coefficient Cpl; calculate the mixed oil amount according to the standard volume and the standard density ρ20 of the oil, and calculate the handover water amount according to the mixed oil amount and the water content data detected by the online water analyzer 5-3; finally, calculate the handover pure oil amount according to the mixed oil amount and the handover water amount.

Claims

1. A metering device for dynamic transfer of crude oil, characterized in that: The metering device for dynamic transfer of crude oil comprises a volumetric flow meter intelligent digital display conversion device (1), a first pressure transmitter (2), a first temperature transmitter (3), a hub-and-spoke multi-point sampler (4), a skid-mounted unit (5), a data acquisition computer (6) and a data display calculation monitoring system (7); wherein the first pressure transmitter (2) and the first temperature transmitter (3) are installed on an oil pipeline (8); each volumetric flow meter of the oil pipeline (8) is installed with a volumetric flow meter intelligent digital display conversion device (1) for converting the volumetric flow of crude oil before and after a certain time period into a volumetric flow. The volume of crude oil flowing through the flow meter within a fixed time is calculated based on the base difference of the flow meter; the skid-mounted unit (5) is connected to the hub-assisted multi-point sampler (4) through a sampling pipeline (5-8); the hub-assisted multi-point sampler (4) is connected to the oil pipeline (8) through a flange to ensure that the crude oil flowing through the skid-mounted unit (5) is representative; the data acquisition calculator (6) is electrically connected to the volumetric flow meter intelligent digital display conversion device (1), the first pressure transmitter (2), the first temperature transmitter (3), the skid-mounted unit (5) and the data display calculation monitoring system (7).

2. The crude oil dynamic transfer metering device according to claim 1, characterized in that: The skid-mounted unit (5) comprises a sampling pump (5-1), a second pressure transmitter (5-2), an online water content analyzer (5-3), an online density meter (5-4), a second temperature transmitter (5-5), a control system explosion-proof connector (5-7), a sampling pipeline (5-8) and a water content analyzer processing unit (5-9); wherein the two ends of the sampling pipeline (5-8) are respectively connected to the outlet and the inlet of the hub-assisted multi-point sampler (4); at least two sampling pumps (5-1) are installed in parallel on the sampling pipeline (5-8) to serve as a backup for each other and are used as a circulating power for the crude oil sample to flow through the skid-mounted unit (5) for detection and then flow back to the oil pipeline (8). source; a second pressure transmitter (5-2), an online water content analyzer (5-3), an online density meter (5-4) and a second temperature transmitter (5-5) are installed on the sampling pipeline (5-8); a control system explosion-proof connector (5-7) is electrically connected to the sampling pump (5-1), the second pressure transmitter (5-2), the online density meter (5-4), the second temperature transmitter (5-5) and the data acquisition computer (6), respectively, and is electrically connected to the online water content analyzer (5-3) through the water content analyzer processing unit (5-9), so as to collect data and operating status of all sensors in the skid-mounted unit (5) and upload them to the data acquisition computer (6).

3. The crude oil dynamic transfer metering device according to claim 2, characterized in that: The skid-mounted unit (5) further comprises a sampling valve (5-6) and an artificial sampling pipeline (5-10); the artificial sampling pipeline (5-10) is connected to the sampling pipeline (5-8), and the sampling valve (5-6) is installed on the artificial sampling pipeline (5-10) and serves as a sampling port for artificial sampling and testing.

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